TC7106CLW_技术文档

TC7106/A/TC7107/A

3-1/2 Digit Analog-to-Digital Converters

Features:

General Description:

• Internal Reference with Low Temperature Drift:

- TC7106/TC7107: 80 ppm/°C (Typical)

- TC7106A/TC7107A: 20 ppm/°C (Typical)

The TC7106A and TC7107A 3-1/2 digit direct display

drive Analog-to-Digital Converters allow existing

TC7106/TC7107 based systems to be upgraded. Each

device has a precision reference with a 20 ppm/°C

maximum temperature coefficient. This represents a 4

to 7 times improvement over similar 3-1/2 digit

converters. Existing TC7106 and TC7107 based

systems may be upgraded without changing external

passive component values. The TC7107A drives

common anode light emitting diode (LED) displays

directly with 8 mA per segment. A low cost, high

resolution indicating meter requires only a display, four

resistors, and four capacitors. The TC7106A low-power

drain and 9V battery operation make it suitable for por-

table applications.

• Drives LCD (TC7106) or LED (TC7107)

Display Directly

• Zero Reading with Zero Input

• Low Noise for Stable Display

• Auto-Zero Cycle Eliminates Need for Zero

Adjustment

• True Polarity Indication for Precision Null

Applications

• Convenient 9V Battery Operation (TC7106A)

• High-Impedance CMOS Differential Inputs: 10¹²Ω

• Differential Reference Inputs Simplify Ratiometric

Measurements

The TC7106A/TC7107A reduces linearity error to less

than 1 count. Rollover error – the difference in readings

for equal magnitude, but opposite polarity input signals,

is below ±1 count. High-impedance differential inputs

• Low-Power Operation: 10 mW

offer 1 pA leakage current and

a

10¹²Ω input

Applications:

impedance. The differential reference input allows

ratiometric measurements for ohms or bridge

transducer measurements. The 15 µV_P–Pnoise

performance ensures a “rock solid” reading. The auto-

zero cycle ensures a zero display reading with a zero

volts input.

• Thermometry

• Bridge Readouts: Strain Gauges, Load Cells, Null

Detectors

• Digital Meters: Voltage/Current/Ohms/Power, pH

• Digital Scales, Process Monitors

• Portable Instrumentation

DS21455D-page 1

TC7106/A/TC7107/A

Package Type

40-Pin PDIP

44-Pin PLCC

V+

1

2

40 OSC1

Normal Pin

Configuration

D

1

39

38

OSC2

OSC3

6

5

4

3

2

1

44 43 42 41 40

C

1

3

B

1

4

37 TEST

7

REF LO

F

G

E

39

38

37

A

1

5

36

35

1s

'

V

+

-

REF

F

1

8

C

6

REF

G

1

34 C_REF

-

7

9

C

REF

E

1

33

C

-

8

REF

D

C

10

11

12

13

14

15

16

17

36 COMMON

2

TC7106ACPL

TC7107AIPL

9

32 ANALOG

COMMON

31

D

C

2

IN HI

NC

35

34

33

10

11

12

13

14

15

16

17

18

19

20

V

+

-

IN

TC7106ACLW

TC7107ACLW

B

A

30 V

IN

10s

'

B

IN LO

29 C

AZ

2

F

E

28

27

26

25

24

V

2

A

F

E

32 A/Z

31 BUFF

30 INT

29 V-

BUFF

INT

2

D

V-

G

3

B

3

2

100s

'

D

2

F

E

C

3

100s

'

23 A

22

3

AB

18 19 20 21 22 23 24 25 26 27 28

1000s

'

G

4

3

21

POL

(Minus Sign)

BP/GND

(7106A/7107A)

44-Pin MQFP

44 43 42 41 40 39 38 37 36 35 34

1

2

NC

33

32

31

30

29

28

27

G

2

TEST

OSC3

NC

3

C

3

4

A

3

5

G

3

TC7106ACKW

TC7107ACKW

OSC2

OSC1

V+

6

BP/GND

POL

7

8

26 AB

4

D

C

B

9

25

24

23

E

1

3

10

11

F

B

3

12 13 14 15 16 17 18 19 20 21 22

DS21455D-page 2

TC7106/A/TC7107/A

Typical Application

0.1 µF

33

LCD Display (TC7106/A) or

Common Node with LED

Display (TC7107/A)

34

C

+

C

-

REF

1 MΩ

31

Segment

Drive

2 - 19

+

V

+

IN

22 - 25

Analog

0.01 µF

Input

20

30

32

POL

V

-

IN

–

Minus Sign

Backplane

Drive

21

1

BP

V+

ANALOG

COMMON

TC7106/A

24 kΩ

1 kΩ

TC7107/A

28

+

V

BUFF

9V

V

47 kΩ

REF

36

+

V

0.47 µF

29

REF

C

V

AZ

100 mV

35

26

V

-

REF

0.22 µF

27

INT

V-

OSC2 OSC3 OSC1

To Analog

Common (Pin 32)

C

39

38

40

OSC

R

100 pF

3 Conversions/Sec

200 mV Full Scale

OSC

100 kΩ

DS21455D-page 3

TC7106/A/TC7107/A

TC7107A

1.0

ELECTRICAL

CHARACTERISTICS

Supply Voltage (V+)..........................................................+6V

Supply Voltage (V-)............................................................-9V

Analog Input Voltage (either Input) (Note 1).............. V+ to V-

Absolute Maximum Ratings†

TC7106A

Reference Input Voltage (either Input)....................... V+ to V-

Clock Input.............................................................GND to V+

Package Power Dissipation (T_A≤ 70°C) (Note 2):

Supply Voltage (V+ to V-)..................................................15V

40-Pin PDIP......................................................1.23W

44-Pin PLCC ....................................................1.23W

44-Pin MQFP....................................................1.00W

Analog Input Voltage (either Input) (Note 1) .............. V+ to V-

Reference Input Voltage (either Input) ....................... V+ to V-

Clock Input ..............................................................Test to V+

Package Power Dissipation (T_A≤ 70°C) (Note 2):

Operating Temperature Range:

C (Commercial) Devices ....................... 0°C to +70°C

I (Industrial) Devices..........................-25°C to +85°C

40-Pin PDIP......................................................1.23W

44-Pin PLCC.....................................................1.23W

44-Pin MQFP....................................................1.00W

Storage Temperature Range.........................-65°C to +150°C

† Notice: Stresses above those listed under “Absolute Maximum

Ratings” may cause permanent damage to the device. These are

stress ratings only and functional operation of the device at these or

any other conditions above those indicated in the operation sections of

the specifications is not implied. Exposure to Absolute Maximum Rat-

ing conditions for extended periods may affect device reliability.

Operating Temperature Range:

C (Commercial) Devices........................0°C to +70°C

I (Industrial) Devices..........................-25°C to +85°C

Storage Temperature Range.........................-65°C to +150°C

TC7106/A AND TC7107/A ELECTRICAL SPECIFICATIONS

Electrical Characteristics: Unless otherwise noted, specifications apply to both the TC7106/TC7106A and TC7107/TC7107A at

T_A= +25°C, f_CLOCK= 48 kHz. Parts are tested in the circuit of the Typical Operating Circuit.

Parameter

Zero Input Reading

Symbol

Z_IR

Min

Typ

Max

Unit

Test Conditions

-000.0

±000.0

+000.0

Digital V_IN= 0.0V

Reading Full Scale = 200.0 mV

Ratiometric Reading

999

-1

999/1000

±0.2

1000

+1

Digital

Reading V_REF= 100 mV

Counts _IN- = + V_IN+ ≅ 200 mV

V_IN= V_REF

Rollover Error (Difference in Reading for R/O

Equal Positive and Negative Reading

Near Full Scale)

V

Linearity (Maximum Deviation from Best

Straight Line Fit)

-1

—

±0.2

50

+1

—

Counts Full Scale = 200 mV or

Full Scale = 2.000V

Common Mode Rejection Ratio (Note 3) CMRR

µV/V

V_CM= ±1V, V_IN= 0V,

Full Scale = 200.0 mV

Noise (Peak to Peak Value not

Exceeded 95% of Time)

e_N

I_L

15

µV

V_IN= 0V

Full Scale - 200.0 mV

Leakage Current at Input

Zero Reading Drift

—

1

10

1

pA

V_IN= 0V

0.2

µV/°C V_IN= 0V

“C” Device = 0°C to +70°C

_IN= 0V

“I” Device = -25°C to +85°C

ppm/°C V_IN= 199.0 mV,

“C” Device = 0°C to +70°C (Ext.

Ref = 0 ppm°C)

_IN= 199.0 mV

—

1.0

1

2

5

µV/°C

V

Scale Factor Temperature Coefficient

TC_SF

—

0.8

20

1.8

ppm/°C

mA

V

“I” Device = -25°C to +85°C

Supply Current (Does not include LED

Current For TC7107/A)

I_DD

V_IN= 0.8

Analog Common Voltage (with Respect V_C

to Positive Supply)

2.7

3.05

3.35

V

25 kΩ Between Common and

Positive Supply

Note 1: Input voltages may exceed the supply voltages, provided the input current is limited to ±100 µA.

2: Dissipation rating assumes device is mounted with all leads soldered to printed circuit board.

3: Refer to “Differential Input” discussion.

4: Backplane drive is in phase with segment drive for “OFF” segment, 180° out of phase for “ON” segment. Frequency is 20

times the conversion rate. Average DC component is less than 50 mV.

DS21455D-page 4

TC7106/A/TC7107/A

TC7106/A AND TC7107/A ELECTRICAL SPECIFICATIONS (CONTINUED)

Electrical Characteristics: Unless otherwise noted, specifications apply to both the TC7106/TC7106A and TC7107/TC7107A at

T_A= +25°C, f_CLOCK= 48 kHz. Parts are tested in the circuit of the Typical Operating Circuit.

Parameter

Symbol

Min

Typ

Max

Unit

Test Conditions

Temperature Coefficient of Analog

Common (with Respect to Positive

Supply)

V_CTC

—

25 kΩ Between Common and

Positive Supply

7106/7/A

7106/7

20

80

50

—

ppm/°C 0°C ≤ T_A≤ +70°C

ppm/°C (“C” Commercial Temperature

Range Devices)

Temperature Coefficient of Analog

Common (with Respect to Positive

Supply)

V_CTC

—

75

ppm/°C 0°C ≤ T_A≤ +70°C

(“I” Industrial Temperature

Range Devices)

TC7106A ONLY Peak to Peak

Segment Drive Voltage

V_SD

V_BD

4

5

6

V

V+ to V- = 9V

(Note 4)

TC7106A ONLY Peak to Peak

Backplane Drive Voltage

V

V+ to V- = 9V

(Note 4)

TC7107A ONLY Segment Sinking

Current (Except Pin 19)

5

8.0

16

—

mA

V+ = 5.0V

Segment Voltage = 3V

TC7107A ONLY Segment Sinking

Current (Pin 19)

10

V+ = 5.0V

Segment Voltage = 3V

Note 1: Input voltages may exceed the supply voltages, provided the input current is limited to ±100 µA.

2: Dissipation rating assumes device is mounted with all leads soldered to printed circuit board.

3: Refer to “Differential Input” discussion.

4: Backplane drive is in phase with segment drive for “OFF” segment, 180° out of phase for “ON” segment. Frequency is 20

times the conversion rate. Average DC component is less than 50 mV.

DS21455D-page 5

TC7106/A/TC7107/A

2.0

PIN DESCRIPTIONS

The descriptions of the pins are listed in Table 2-1.

TABLE 2-1:

PIN FUNCTION TABLE

Pin Number

Pin No.

(40-Pin PDIP) (40-Pin PDIP)

Symbol

Description

Normal

(Reversed

1

(40)

(39)

(38)

(37)

(36)

(35)

(34)

(33)

(32)

(31)

(30)

(29)

(28)

(27)

(26)

(25)

(24)

(23)

(22)

(21)

(20)

(19)

(18)

(17)

(16)

(15)

(14)

V+

D₁

C₁

B₁

Positive supply voltage.

2

Activates the D section of the units display.

Activates the C section of the units display.

Activates the B section of the units display.

Activates the A section of the units display.

Activates the F section of the units display.

Activates the G section of the units display.

Activates the E section of the units display.

Activates the D section of the tens display.

Activates the C section of the tens display.

Activates the B section of the tens display.

Activates the A section of the tens display.

Activates the F section of the tens display.

Activates the E section of the tens display.

Activates the D section of the hundreds display.

Activates the B section of the hundreds display.

Activates the F section of the hundreds display.

Activates the E section of the hundreds display.

Activates both halves of the 1 in the thousands display.

Activates the negative polarity display.

3

4

5

A₁

6

F₁

7

G₁

E₁

8

9

D₂

C₂

B₂

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

A₂

F₂

E₂

D₃

B₃

F₃

E₃

AB₄

POL

BP/GND LCD Backplane drive output (TC7106A). Digital Ground (TC7107A).

G₃

A₃

Activates the G section of the hundreds display.

Activates the A section of the hundreds display.

Activates the C section of the hundreds display.

Activates the G section of the tens display.

Negative power supply voltage.

C₃

G₂

V-

V_INT

Integrator output. Connection point for integration capacitor. See INTEGRATING

CAPACITOR section for more details.

28

29

(13)

(12)

V_BUFF

C_AZ

Integration resistor connection. Use a 47 kΩ resistor for a 200 mV full scale range

and a 47 kΩ resistor for 2V full scale range.

The size of the auto-zero capacitor influences system noise. Use a 0.47 µF capacitor

for 200 mV full scale, and a 0.047 µF capacitor for 2V full scale. See Section 7.1

“Auto-Zero Capacitor (CAZ)” on Auto-Zero Capacitor for more details.

30

31

32

(11)

(10)

(9)

V_IN

-

The analog LOW input is connected to this pin.

+

The analog HIGH input signal is connected to this pin.

ANALOG This pin is primarily used to set the Analog Common mode voltage for battery

COMMON operation or in systems where the input signal is referenced to the power supply. It

also acts as a reference voltage source. See Section 8.3 “Analog Common (Pin

32)” on ANALOG COMMON for more details.

33

34

(8)

(7)

C_REF

-

See Pin 34.

+

A 0.1 µF capacitor is used in most applications. If a large Common mode voltage

exists (for example, the V_IN- pin is not at analog common), and a 200 mV scale is

used, a 1 µF capacitor is recommended and will hold the rollover error to 0.5 count.

35

(6)

V_REF

-

See Pin 36.

DS21455D-page 6

TC7106/A/TC7107/A

TABLE 2-1:

PIN FUNCTION TABLE (CONTINUED)

Pin Number

Pin No.

(40-Pin PDIP) (40-Pin PDIP)

Symbol

Description

Normal

(Reversed

36

(5)

V_REF

+

The analog input required to generate a full scale output (1999 counts). Place

100 mV between Pins 35 and 36 for 199.9 mV full scale. Place 1V between Pins 35

and 36 for 2V full scale. See paragraph on Reference Voltage.

37

(4)

TEST

Lamp test. When pulled HIGH (to V+) all segments will be turned on and the display

should read -1888. It may also be used as a negative supply for externally generated

decimal points. See paragraph under TEST for additional information.

38

39

40

(3)

(2)

(1)

OSC3

OSC2

OSC1

See Pin 40.

Pins 40, 39, 38 make up the oscillator section. For a 48 kHz clock (3 readings per

section), connect Pin 40 to the junction of a 100 kΩ resistor and a 100 pF capacitor.

The 100 kΩ resistor is tied to Pin 39 and the 100 pF capacitor is tied to Pin 38.

DS21455D-page 7

TC7106/A/TC7107/A

For a constant V_IN:

3.0

DETAILED DESCRIPTION

(All Pin designations refer to 40-Pin PDIP.)

EQUATION 3-2:

T_RI

T_SI

3.1

Dual Slope Conversion Principles

V_IN= V_R

The TC7106A and TC7107A are dual slope, integrating

Analog-to-Digital Converters. An understanding of the

dual slope conversion technique will aid in following the

detailed operation theory.

The dual slope converter accuracy is unrelated to the

integrating resistor and capacitor values as long as

they are stable during a measurement cycle. An

inherent benefit is noise immunity. Noise spikes are

integrated or averaged to zero during the integration

periods. Integrating ADCs are immune to the large

The conventional dual slope converter measurement

cycle has two distinct phases:

• Input Signal Integration

conversion

errors

that

plague

successive

• Reference Voltage Integration (De-integration)

approximation converters in high noise environments.

Interfering signals with frequency components at

multiples of the averaging period will be attenuated.

Integrating ADCs commonly operate with the signal

integration period set to a multiple of the 50/60Hz

power line period (see Figure 3-2).

The input signal being converted is integrated for a

fixed time period (T_SI). Time is measured by counting

clock pulses. An opposite polarity constant reference

voltage is then integrated until the integrator output

voltage returns to zero. The reference integration time

is directly proportional to the input signal (T_RI). See

Figure 3-1.

30

C

Analog

Input

Integrator

Signal

Comparator

–

20

–

+

+/–

Switch

Driver

10

Phase

Control

Polarity Control

REF

Voltage

Control

Logic

T = Measured Period

0

0.1/T

1/T

10/T

Counter

DISPLAY

Input Frequency

V

µ V

µ

IN

REF

1/2

V

REF

IN

FIGURE 3-2:

Normal Mode Rejection of

Dual Slope Converter.

Fixed Variable

Signal Reference

Integrate Integrate

Time Time

V_FS

1

⎛

⎝

⎞ ⎛

⎞

⎠

------------ -----------

(4000)

⎠ ⎝

F_OSCR_INT

FIGURE 3-1:

Basic Dual Slope Converter.

complete

C_INT= -----------------------------------------------------

V_INT

In simple dual slope converter,

a

Where:

F_OSC

V_FS

conversion requires the integrator output to “ramp-up”

and “ramp-down.” A simple mathematical equation

relates the input signal, reference voltage and

integration time.

=

Clock Frequency at Pin 38

Full Scale Input Voltage

Integrating Resistor

=

R_INT

V_INT

Desired Full Scale Integrator Output

Swing

EQUATION 3-1:

T_SI

V_RT_RI

V_IN(t)dt = --------------

RC

1

RC

-------

∫

0

Where:

V_R

=

Reference voltage

T_SI

Signal integration time (fixed)

T_RI

Reference voltage integration time

(variable).

DS21455D-page 8

TC7106/A/TC7107/A

4.3

Reference Integrate Phase

4.0

ANALOG SECTION

The third phase is reference integrate or de-integrate.

V_IN- is internally connected to analog common and

V_IN+ is connected across the previously charged

reference capacitor. Circuitry within the chip ensures

that the capacitor will be connected with the correct

polarity to cause the integrator output to return to zero.

In addition to the basic signal integrate and de-

integrate cycles discussed, the circuit incorporates an

auto-zero cycle. This cycle removes buffer amplifier,

integrator, and comparator offset voltage error terms

from the conversion. A true digital zero reading results

without adjusting external potentiometers. A complete

conversion consists of three cycles: an auto-zero,

signal integrate, and reference integrate cycle.

The time required for the output to return to zero is

proportional to the input signal and is between 0 and

2000 counts.

4.1

Auto-Zero Cycle

The digital reading displayed is:

During the auto-zero cycle, the differential input signal

is disconnected from the circuit by opening internal

analog gates. The internal nodes are shorted to analog

common (ground) to establish a zero input condition.

Additional analog gates close a feedback loop around

the integrator and comparator. This loop permits

comparator offset voltage error compensation. The

voltage level established on C_AZcompensates for

device offset voltages. The offset error referred to the

input is less than 10 µV.

EQUATION 4-2:

V_IN

1000 = ------------

V_REF

The auto-zero cycle length is 1000 to 3000 counts.

4.2

Signal Integrate Cycle

The auto-zero loop is entered and the internal

differential inputs connect to V_IN+ and V_IN-. The

differential input signal is integrated for a fixed time

period. The TC7106/TC7106A signal integration period

is 1000 clock periods or counts. The externally set

clock frequency is divided by four before clocking the

internal counters.

The integration time period is:

EQUATION 4-1:

4

------------

T_SI

=

× 1000

F_OSC

Where:

F_OSC

=

Externally set clock frequency

The differential input voltage must be within the device

Common mode range when the converter and

measured system share the same power supply

common (ground). If the converter and measured

system do not share the same power supply common,

V_IN- should be tied to analog common.

Polarity is determined at the end of signal integrate

phase. The sign bit is a true polarity indication, in that

signals less than 1 LSB are correctly determined. This

allows precision null detection limited only by device

noise and auto-zero residual offsets.

DS21455D-page 9

TC7106/A/TC7107/A

5.0

DIGITAL SECTION (TC7106A)

The TC7106A (Figure 5-2) contains all the segment

drivers necessary to directly drive a 3-1/2 digit liquid

crystal display (LCD). An LCD backplane driver is

included. The backplane frequency is the external

clock frequency divided by 800. For three

conversions per second, the backplane frequency is

60Hz with a 5V nominal amplitude. When a segment

driver is in phase with the backplane signal, the

segment is “OFF.” An out of phase segment drive

signal causes the segment to be “ON” or visible. This

AC drive configuration results in negligible DC voltage

across each LCD segment. This insures long LCD

display life. The polarity segment driver is “ON” for

negative analog inputs. If V_IN+ and V_IN- are reversed,

this indicator will reverse.

When the TEST pin on the TC7106A is pulled to V+, all

segments are turned “ON.” The display reads -1888.

During this mode, the LCD segments have a constant

DC voltage impressed. DO NOT LEAVE THE

DISPLAY IN THIS MODE FOR MORE THAN

SEVERAL MINUTES! LCD displays may be destroyed

if operated with DC levels for extended periods.

The display font and the segment drive assignment are

shown in Figure 5-1.

Display Font

1000s' 100s'

10s'

1s'

FIGURE 5-1:

Display Font and Segment

Assignment

In the TC7106A, an internal digital ground is generated

from a 6-volt zener diode and a large P channel source

follower. This supply is designed to absorb the large

capacitive currents when the backplane voltage is

switched.

DS21455D-page 10

TC7106/A/TC7107/A

FIGURE 5-2:

TC7106A Block Diagram.

DS21455D-page 11

TC7106/A/TC7107/A

6.2

Clock Circuit

6.0

DIGITAL SECTION (TC7107A)

Three clocking methods may be used (see Figure 6-1):

Figure 6-2 shows a TC7106A block diagram. It is

designed to drive common anode LEDs. It is identical

to the TC7106A, except that the regulated supply and

backplane drive have been eliminated and the segment

drive is typically 8 mA. The 1000’s output (Pin 19) sinks

current from two LED segments, and has a 16 mA drive

capability.

1. An external oscillator connected to Pin 40.

2. A crystal between Pins 39 and 40.

3. An RC oscillator using all three pins.

TC7106A

TC7107A

In both devices, the polarity indication is “ON” for

negative analog inputs. If V_IN- and V_IN+ are reversed,

this indication can be reversed also, if desired.

To

Counter

µ

4

The display font is the same as the TC7106A.

40

Crystal

39

38

6.1

System Timing

EXT

OSC

The oscillator frequency is divided by 4 prior to clocking

the internal decade counters. The four-phase

measurement cycle takes a total of 4000 counts, or

16,000 clock pulses. The 4000-count cycle is indepen-

dent of input signal magnitude.

RC Network

To TEST Pin on TSC7106A

To GND Pin on TSC7107A

FIGURE 6-1:

Clock Circuits.

Each phase of the measurement cycle has the

following length:

1. Auto-zero phase: 1000 to 3000 counts (4000 to

12000 clock pulses).

For signals less than full scale, the auto-zero phase is

assigned the unused reference integrate time period:

2. Signal integrate: 1000 counts (4000 clock

pulses).

This time period is fixed. The integration period is:

EQUATION 6-1:

4

------------

T_SI

=

× 1000

F_OSC

Where:

F_OSC

=

Externally set clock frequency

3. Reference Integrate: 0 to 2000 counts (0 to 8000

clock pulses).

The TC7106A/TC7107A are drop-in replacements for

the TC7106/TC7107 parts. External component value

changes are not required to benefit from the low drift

internal reference.

DS21455D-page 12

TC7106/A/TC7107/A

FIGURE 6-2:

TC7107A Block Diagram.

DS21455D-page 13

TC7106/A/TC7107/A

7.4

Integrating Resistor (R_INT)

7.0

COMPONENT VALUE

SELECTION

The input buffer amplifier and integrator are designed

with class A output stages. The output stage idling

current is 100 µA. The integrator and buffer can supply

20 µA drive currents with negligible linearity errors.

R_INTis chosen to remain in the output stage linear drive

region, but not so large that printed circuit board

leakage currents induce errors. For a 200 mV full scale,

R_INTis 47 kΩ. 2.0V full scale requires 470 kΩ.

7.1

Auto-Zero Capacitor (C_AZ)

The C_AZcapacitor size has some influence on system

noise. A 0.47 µF capacitor is recommended for 200 mV

full scale applications where 1LSB is 100 µV. A

0.047 µF capacitor is adequate for 2.0V full scale

applications. A mylar type dielectric capacitor is

adequate.

TABLE 7-1:

COMPONENT VALUES AND

NOMINAL FULL SCALE

VOLTAGE

7.2

Reference Voltage Capacitor

(C_REF

)

Nominal Full Scale Voltage

Component

Value

The reference voltage used to ramp the integrator out-

put voltage back to zero during the reference integrate

cycle is stored on C_REF. A 0.1 µF capacitor is

acceptable when V_IN- is tied to analog common. If a

large Common mode voltage exists (V_REF- – analog

common) and the application requires 200 mV full

scale, increase C_REFto 1.0 µF. Rollover error will be

held to less than 1/2 count. A mylar dielectric capacitor

is adequate.

200.0 mV

2.000V

C_AZ

R_INT

C_INT

0.47 µF

47 kΩ

0.047 µF

470 kΩ

0.22 µF

Note:

F_OSC= 48 kHz (3 readings per sec).

7.5

Oscillator Components

R_OSC(Pin 40 to Pin 39) should be 100 kΩ. C_OSCis

selected using the equation:

7.3

Integrating Capacitor (C_INT)

C_INTshould be selected to maximize the integrator

output voltage swing without causing output saturation.

Due to the TC7106A/TC7107A superior temperature

coefficient specification, analog common will normally

supply the differential voltage reference. For this case,

a ±2V full scale integrator output swing is satisfactory.

For 3 readings/second (F_OSC= 48 kHz), a 0.22 µF

value is suggested. If a different oscillator frequency is

used, C_INTmust be changed in inverse proportion to

maintain the nominal ±2V integrator swing.

EQUATION 7-2:

0.45

RC

F_OSC= ---------

Where:

F_OSC

C_OSC

=

48 kHz

100 pF

Note that F_OSCis divided by four to generate the

TC7106A internal control clock. The backplane drive

signal is derived by dividing F_OSCby 800.

An exact expression for C_INTis:

EQUATION 7-1:

To achieve maximum rejection of 60 Hz noise pickup,

the signal integrate period should be a multiple of

60 Hz. Oscillator frequencies of 240 kHz, 120 kHz,

80 kHz, 60 kHz, 48 kHz, 40 kHz, etc. should be

selected. For 50 Hz rejection, oscillator frequencies of

200 kHz, 100 kHz, 66-2/3 kHz, 50 kHz, 40 kHz, etc.

would be suitable. Note that 40 kHz (2.5 readings/

second) will reject both 50 Hz and 60 Hz.

V_FS

1

⎛

⎝

⎞ ⎛

⎞

⎠

------------ -----------

(4000)

⎠ ⎝

F_OSCR_INT

C_INT= -----------------------------------------------------

V_INT

Where:

F_OSC

V_FS

=

Clock Frequency at Pin 38

Full Scale Input Voltage

Integrating Resistor

=

R_INT

7.6

Reference Voltage Selection

V_INT

Desired Full Scale Integrator Output

Swing

A full scale reading (2000 counts) requires the input

signal be twice the reference voltage.

C_INTmust have low dielectric absorption to minimize

Required Full Scale Voltage*

V_REF

rollover error.

recommended.

A

polypropylene capacitor is

200.0 mV

2.000V

100.0 mV

1.000V

* V_FS= 2V_REF

DS21455D-page 14

TC7106/A/TC7107/A

In some applications, a scale factor other than unity

may exist between a transducer output voltage and the

required digital reading. Assume, for example, a

pressure transducer output is 400 mV for 2000 lb/in².

Rather than dividing the input voltage by two, the

reference voltage should be set to 200 mV. This

permits the transducer input to be used directly.

V+

6.8V

Zener

V

+

-

REF

6.8 kΩ

V

TC7106A

TC7107A

REF

20 k

Ω

TC7106A

TC7107A

I

The differential reference can also be used when a

digital zero reading is required when V_INis not equal to

zero. This is common in temperature measuring

instrumentation. A compensating offset voltage can be

applied between analog common and V_IN-. The

transducer output is connected between V_IN+ and

analog common.

Z

V

+

REF

1.2V

Ref

V

-

REF

Common

(b)

(a)

FIGURE 7-1:

External Reference.

The internal voltage reference potential available at

analog common will normally be used to supply the

converter’s reference. This potential is stable

whenever the supply potential is greater than

approximately 7V. In applications where an externally

generated reference voltage is desired, refer to

Figure 7-1.

DS21455D-page 15

TC7106/A/TC7107/A

8.2

Differential Reference

_REF+ (Pin 36), V_REF- (Pin 35)

8.0

DEVICE PIN FUNCTIONAL

DESCRIPTION

V

The reference voltage can be generated anywhere

within the V+ to V- power supply range.

8.1

Differential Signal Inputs

V_IN+ (Pin 31), V_IN- (Pin 30)

To prevent rollover type errors being induced by large

Common mode voltages, C_REFshould be large

compared to stray node capacitance.

The TC7106A/TC7107A is designed with true

differential inputs and accepts input signals within the

input stage common mode voltage range (V_CM). The

typical range is V+ – 1.0 to V+ + 1V. Common mode

voltages are removed from the system when the

TC7106A/TC7107A operates from a battery or floating

power source (isolated from measured system) and

V_IN- is connected to analog common (V_COM) (see

Figure 8-2).

The TC7106A/TC7107A circuits have a significantly

lower analog common temperature coefficient. This

gives a very stable voltage suitable for use as a

reference. The temperature coefficient of analog

common is 20 ppm/°C typically.

8.3

Analog Common (Pin 32)

In systems where Common mode voltages exist, the

86 dB Common mode rejection ratio minimizes error.

Common mode voltages do, however, affect the

integrator output level. Integrator output saturation

must be prevented. A worst-case condition exists if a

large positive V_CMexists in conjunction with a full scale

negative differential signal. The negative signal drives

the integrator output positive along with V_CM(see

Figure 8-1). For such applications the integrator output

swing can be reduced below the recommended 2.0V

full scale swing. The integrator output will swing within

0.3V of V+ or V- without increasing linearity errors.

The analog common pin is set at a voltage potential

approximately 3.0V below V+. The potential is between

2.7V and 3.35V below V+. Analog common is tied

internally to the N channel FET capable of sinking

20 mA. This FET will hold the common line at 3.0V

should an external load attempt to pull the common line

toward V+. Analog common source current is limited to

10 µA. Analog common is, therefore, easily pulled to a

more negative voltage (i.e., below V+ – 3.0V).

The TC7106A connects the internal V_IN+ and V_IN-

inputs to analog common during the auto-zero cycle.

During the reference integrate phase, V_IN- is

connected to analog common. If V_IN- is not externally

connected to analog common, a Common mode

voltage exists. This is rejected by the converter’s 86 dB

Common mode rejection ratio. In battery operation,

analog common and V_IN- are usually connected,

removing Common mode voltage concerns. In systems

where V- is connected to the power supply ground, or

to a given voltage, analog common should be

connected to V_IN-.

C

I

Input Buffer

R

+

I

–

V

I

V

IN

+

Integrator

–

T

I

V =

V_CM– V_IN

[

I

[

R

C

I

V

CM

Where:

4000

=

T = Integration Time

I

F

OSC

C = Integration Capacitor

I

R = Integration Resistor

I

FIGURE 8-1:

Common Mode Voltage

Reduces Available Integrator Swing (V_COM≠ V_IN).

DS21455D-page 16

TC7106/A/TC7107/A

Segment

Drive

LCD Display

Measured

System

V

C

V

INT

POL BP

OSC1

BUF

+

AZ

V

IN

TC7106A

V+

V-

OSC3

-

OSC2

V-

GND

Analog

Common

V

REF

+

-

REF

V+

V-

GND

Power

Source

+

9V

FIGURE 8-2:

Common Mode Voltage Removed in Battery Operation with V - = Analog Common.

IN

The analog common pin serves to set the analog section

reference or common point. The TC7106A is specifically

designed to operate from a battery, or in any

measurement system where input signals are not

referenced (float), with respect to the TC7106A power

source. The analog common potential of V+ – 3.0V gives

a 6V end of battery life voltage. The common potential

has a 0.001% voltage coefficient and a 15Ω output

impedance.

external voltage references. External R and C values

do not need to be changed. Figure 8-4 shows analog

common supplying the necessary voltage reference for

the TC7106A/TC7107A.

200

180

No Maximum Specified

No

Maximum

Specified

160

140

120

100

With sufficiently high total supply voltage (V+ – V- >

7.0V), analog common is a very stable potential with

excellent temperature stability, typically 20 ppm/°C.

This potential can be used to generate the reference

voltage. An external voltage reference will be

unnecessary in most cases because of the 50 ppm/°C

maximum temperature coefficient. See Section 8.5

“Internal Voltage Reference”.

Typical

No

Maximum

Specified

Maximum

Limit

80

60

40

20

Typical

TC

ICL7106

ICL7136

7106A

8.4

TEST (Pin 37)

0

The TEST pin potential is 5V less than V+. TEST may

be used as the negative power supply connection for

external CMOS logic. The TEST pin is tied to the

internally generated negative logic supply (Internal

FIGURE 8-3:

Temperature Coefficient.

Analog Common

Logic Ground) through

a 500Ω resistor in the

TC7106A. The TEST pin load should be no more than

1 mA.

1

24k

Ω

V-

V+

If TEST is pulled to V+ all segments plus the minus sign

will be activated. Do not operate in this mode for more

than several minutes with the TC7106A. With

TEST = V+, the LCD segments are impressed with a

DC voltage which will destroy the LCD.

TC7106A

TC7107A

36

V

1kΩ

+

REF

V

REF

The TEST pin will sink about 10 mA when pulled to V+.

35

V

-

REF

32

Analog

Common

8.5

Internal Voltage Reference

Set V

= 1/2 V

FULL SCALE

The analog common voltage temperature stability has

been significantly improved (Figure 8-3). The “A”

version of the industry standard circuits allow users to

upgrade old systems and design new systems without

REF

FIGURE 8-4:

Connection.

Internal Voltage Reference

DS21455D-page 17

TC7106/A/TC7107/A

9.1

TC7107 Power Dissipation

Reduction

9.0

POWER SUPPLIES

The TC7107A is designed to work from ±5V supplies.

However, if a negative supply is not available, it can be

generated from the clock output with two diodes, two

capacitors, and an inexpensive IC (Figure 9-1).

The TC7107A sinks the LED display current and this

causes heat to build up in the IC package. If the internal

voltage reference is used, the changing chip

temperature can cause the display to change reading.

By reducing the LED common anode voltage, the

TC7107A package power dissipation is reduced.

V+

CD4009

Figure 9-3 is a curve tracer display showing the

relationship between output current and output voltage

for a typical TC7107CPL. Since a typical LED has 1.8

volts across it at 7 mA, and its common anode is

connected to +5V, the TC7107A output is at 3.2V (point

A on Figure 9-3). Maximum power dissipation is

8.1 mA x 3.2V x 24 segments = 622 mW.

V+

OSC1

OSC2

0.047

µF

1N914

+

–

OSC3

10

µF

TC7107A

1N914

GND

V-

10.000

V- = -3.3V

9.000

FIGURE 9-1:

Generating Negative Supply

A

From +5V.

8.000

7.000

6.000

B

In selected applications a negative supply is not

required. The conditions to use a single +5V supply

are:

C

• The input signal can be referenced to the center

of the Common mode range of the converter.

2.00

2.50

3.00

3.50

4.00

Output Voltage (V)

• The signal is less than ±1.5V.

• An external reference is used.

FIGURE 9-3:

Output Voltage.

TC7107 Output Current vs.

The TSC7660 DC-to-DC converter may be used to

generate -5V from +5V (Figure 9-2).

Notice, however, that once the TC7107A output voltage

is above two volts, the LED current is essentially

constant as output voltage increases. Reducing the

output voltage by 0.7V (point B in Figure 9-3) results in

7.7 mA of LED current, only a 5 percent reduction.

Maximum power dissipation is only 7.7 mA x 2.5V x 24

= 462 mW, a reduction of 26%. An output voltage

reduction of 1 volt (point C) reduces LED current by

10% (7.3 mA) but power dissipation by 38% (7.3 mA x

2.2V x 24 = 385 mW).

+5V

1

36

V+

V

+

REF

35

32

V

-

REF

LED

DRIVE

Reduced power dissipation is very easy to obtain.

Figure 9-4 shows two ways: either a 5.1Ω, 1/4W

resistor, or a 1A diode placed in series with the display

(but not in series with the TC7107A). The resistor will

reduce the TC7107A output voltage, when all 24

segments are “ON,” to point “C” of Figure 9-4. When

segments turn off, the output voltage will increase. The

diode, on the other hand, will result in a relatively

steady output voltage, around point “B”.

COM

TC7107A

31

V

+

IN

V

IN

30

21

V

-

IN

GND

V-

26

8

TC7660

2

4

+

(-5V)

5

10 µF

3

+

10 µF

FIGURE 9-2:

Negative Power Supply

Generation with TC7660.

DS21455D-page 18

TC7106/A/TC7107/A

In addition to limiting maximum power dissipation, the

resistor reduces the change in power dissipation as the

display changes. This effect is caused by the fact that,

as fewer segments are “ON,” each “ON” output drops

more voltage and current. For the best case of six

segments (a “111” display) to worst-case (a “1888”

display), the resistor will change about 230 mW, while

a circuit without the resistor will change about 470 mW.

Therefore, the resistor will reduce the effect of display

dissipation on reference voltage drift by about 50%.

The change in LED brightness caused by the resistor is

almost unnoticeable as more segments turn off. If

display brightness remaining steady is very important

to the designer, a diode may be used instead of the

resistor.

IN

-5V

+5V

+

–

1 MΩ

24 kΩ

150

Ω

TP3

1 kΩ

0.47

µF

0.22

µF

100 pF

0.01

µ

F

TP5

100

kΩ

Display

TP2

TP1

0.1

47

µ

F

k

Ω

40

1

30

TP

4

21

20

TC7107A

10

Display

5.1 1/4W

Ω

1N4001

FIGURE 9-4:

Diode or Resistor Limits

Package Power Dissipation.

DS21455D-page 19

TC7106/A/TC7107/A

input and the voltage across the known resistor is

applied to the reference input. If the unknown equals

the standard, the display will read 1000.

10.0 TYPICAL APPLICATIONS

10.1 Decimal Point and Annunciator

Drive

The displayed reading can be determined from the

following expression:

The TEST pin is connected to the internally generated

digital logic supply ground through a 500Ω resistor. The

TEST pin may be used as the negative supply for

external CMOS gate segment drivers. LCD display

annunciators for decimal points, low battery indication,

or function indication may be added without adding an

additional supply. No more than 1 mA should be

supplied by the TEST pin; its potential is approximately

5V below V+ (see Figure 10-1).

EQUATION 10-1:

R_UNKNOWN

-----------------------------

Displayed (Reading) =

× 1000

R_STANDARD

The display will over range for:

R_UNKNOWN≥ 2 x R_STANDARD

V+

V

+

-

REF

V_REF

R

V+

STANDARD

V+

LCD Display

V

+

^INTC7106A

4049

R

UNKNOWN

TC7106A

To LCD

Decimal

Point

21

BP

V -

IN

Analog

Common

GND

37

TEST

To LCD

Backplane

FIGURE 10-2:

Low Parts Count

Ratiometric Resistance Measurement.

V+

+

9V

V+

BP

160 k

Ω

300 k

Ω

300kΩ

To LCD

Decimal

Point

V+

-

V-

Decimal

Point

Select

TC7106A

V

IN

R

50 k

1N4148

Sensor

V

+

1

Ω

IN

TC7106A

V

= 2V

4030

GND

TEST

FS

R

V

+

2

REF

50 k

Ω

V

-

REF

Common

FIGURE 10-1:

Decimal Point Drive Using

Test as Logic Ground.

FIGURE 10-3:

Temperature Sensor.

10.2 Ratiometric Resistance

Measurements

The true differential input and differential reference

make ratiometric reading possible. Typically in a

ratiometric operation, an unknown resistance is

measured, with respect to

a

known standard

resistance. No accurately defined reference voltage is

needed.

The unknown resistance is put in series with a known

standard and a current passed through the pair. The

voltage developed across the unknown is applied to the

DS21455D-page 20

TC7106/A/TC7107/A

To Pin 1

+

9V

Set V

= 100 mV

REF

40

39

38

37

36

35

34

33

32

31

30

29

28

27

26

25

24

23

22

21

100 k

Ω

5.6 k

Ω

160 kΩ

V+

V-

100 pF

R

V

-

1

Ω

1N914

IN

20 k

+5V

1 k

Ω

22 k

1 M

Ω

V

+

0.1 µF

IN

Ω

+

–

TC7106A

0.7%/×C

PTC

TC7107A

R

20 k

R

3

2

Ω

V

+

IN

0.01 µF

47 k

REF

0.47 µF

Ω

V

-

REF

0.22µF

Common

-5V

To Display

FIGURE 10-4:

Positive Temperature

Coefficient Resistor Temperature Sensor.

FIGURE 10-6:

TC7107 Internal Reference:

200 mV Full Scale, 3RPS, V_IN- Tied to GND for

Single Ended Inputs.

To Pin 1

Set V

= 100 mV

REF

40

39

38

37

36

35

34

33

32

31

30

29

28

27

26

25

24

23

22

21

100 k

Ω

100 pF

V+

1

40

1 k

Ω

22 k

1M

Ω

0.1 µF

To Logic

+

–

V

CC

TC7106A

IN

0.01 µF

47 k

To Logic

V

TC7106A

CC

+

–

0.47 µF

Ω

9V

0.22 µF

V-

O/R

U/R

To Display

To Backplane

20

21

CD4023

OR 74C10

CD4077 O/R = Over Range

U/R = Under Range

FIGURE 10-5:

Reference: 200 mV Full Scale, 3 Readings-Per-

Second (RPS).

TC7106A, Using the Internal

FIGURE 10-7:

Circuit for Developing Under

Range and Over Range Signals from TC7106A

Outputs.

DS21455D-page 21

TC7106/A/TC7107/A

To Pin 1

To PIn 1

Set V

= 1V

REF

40

39

38

37

36

35

34

33

32

31

30

29

28

27

26

25

24

23

22

21

100 k

Ω

40

39

38

37

36

35

34

33

32

31

30

29

28

27

26

25

24

23

22

21

100k

Ω

Set V

= 100mV

REF

100 pF

100pF

24 k

Ω

10kΩ

10k

Ω

V+

25 k

Ω

1k

Ω

0.1 µF

0.1µF

1 M

0.01 µF

470 k

Ω

+

1.2V

0.01µF

TC7106A

TC7107A

IN

1MΩ

0.047 µF

–

0.47µ

F

–

Ω

47k

Ω

0.22µF

0.22 µF

V-

To Display

FIGURE 10-8:

TC7106/TC7107:

FIGURE 10-9:

TC7107 Operated from

Recommended Component Values for 2.00V Full

Scale.

Single +5V Supply.

+

9V

+

IN4148

200 mV

1 mF

26

–

V

27

29

28

1

IN

V-

V+

V

14

13

12

11

10

9

1

2

3

4

5

6

7

10 k

1 M

Ω

9 M

Ω

24 k

Ω

2V

0.02

mF

Ω

TC7106A

900 k

Ω

1 M

Ω

36

+

20V

200V

1 k

Ω

REF

AD636

47 k

1W

10%

Ω

–

35

32

31

V

-

REF

90 k

10 k

Ω

6.8µF

+

Analog Common

V +

1 MΩ 10%

40

8

IN

0.01

µF

20 k

Ω

2.2µF

10%

30

26

38

39

V

-

COM

IN

C1 = 3 - 10 pF Variable

C2 = 132 pF Variable

V-

BP

SEG

DRIVE

LCD Display

FIGURE 10-10:

3-1/2 Digit True RMS AC DMM.

DS21455D-page 22

TC7106/A/TC7107/A

9V

2

1

Constant 5V

V+

V

+

REF

TC7106A

REF02

51 k

Ω

5.1 k

Ω

TC911

50 k

Ω

6

V

R

-

2

OUT

REF

R

5

4

V

= 2.00V

FS

5

3

2

–

8

1

ADJ

NC

V

-

IN

3

+

TEMP

V

=

OUT

4

+

1.86V @

25×C

IN

Temperature

Dependent

Output

50 k

1.3k

R

1

Common

V-

GND

4

26

FIGURE 10-11:

Integrated Circuit Temperature Sensor.

DS21455D-page 23

TC7106/A/TC7107/A

11.0 PACKAGING INFORMATION

11.1 Package Marking Information

40-Pin PDIP

Example:

XXXXXXXXXXXXXXXXXX

TC7106CPL^

e3

^

XXXXXXXXXXXXXXXXXX

YYWWNNN

*h

0743256

*h

44-Pin MQFP

Example:

M

^^0743256

XXXXXXXXXX

YYWWNNN

TC106CKW

e

3

44-Pin PLCC

Example:

1

M

XXXXXXXXXXX

YYWWNNN

TC7106CLW

e

3

^^0743256

Legend: XX...X Customer-specific information

Y

Year code (last digit of calendar year)

YY

Year code (last 2 digits of calendar year)

WW

NNN

Week code (week of January 1 is week ‘01’)

Alphanumeric traceability code

Pb-free JEDEC designator for Matte Tin (Sn)

This package is Pb-free. The Pb-free JEDEC designator (

can be found on the outer packaging for this package.

e

3

e

3

*

)

Note: In the event the full Microchip part number cannot be marked on one line, it will

be carried over to the next line, thus limiting the number of available

characters for customer-specific information.

DS21455D-page 24

TC7106/A/TC7107/A

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+ꢉꢇꢌꢅꢏꢕꢅꢚꢌꢉꢏꢃꢄꢛꢅꢂꢊꢉꢄꢌ

ꢚꢘꢕꢈꢊꢋꢌꢐꢅꢏꢕꢅꢚꢘꢕꢈꢊꢋꢌꢐꢅ:ꢃꢋꢏꢘ

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5ꢌꢉꢋꢅ-ꢘꢃꢖ/ꢄꢌꢇꢇ

1##ꢌꢐꢅ5ꢌꢉꢋꢅ:ꢃꢋꢏꢘ

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ꢛꢗꢋꢄꢊꢜ

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ꢁ !ꢃꢑꢌꢄꢇꢃꢕꢄꢇꢅ!ꢅꢉꢄꢋꢅꢝꢀꢅꢋꢕꢅꢄꢕꢏꢅꢃꢄꢖꢊꢈꢋꢌꢅꢑꢕꢊꢋꢅꢎꢊꢉꢇꢘꢅꢕꢐꢅ#ꢐꢕꢏꢐꢈꢇꢃꢕꢄꢇꢁꢅ$ꢕꢊꢋꢅꢎꢊꢉꢇꢘꢅꢕꢐꢅ#ꢐꢕꢏꢐꢈꢇꢃꢕꢄꢇꢅꢇꢘꢉꢊꢊꢅꢄꢕꢏꢅꢌꢍꢖꢌꢌꢋꢅꢁ%ꢀ%&ꢅ#ꢌꢐꢅꢇꢃꢋꢌꢁ

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DS21455D-page 25

TC7106/A/TC7107/A

ꢀꢀꢂꢃꢄꢅꢆꢇꢈꢉꢅꢊꢋꢌꢍꢇ ꢄꢋ!ꢌꢍꢇ"ꢏꢅꢆꢇ#ꢉꢅꢋ$ꢅꢍ%ꢇꢒ&'ꢓꢇMꢇ(ꢁ)(ꢁ)*ꢇꢕꢕꢇꢖꢗꢆꢘ+ꢇ,-*ꢁꢇꢕꢕꢇꢙ "#ꢈꢚ

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DS21455D-page 26

TC7106/A/TC7107/A

ꢀꢀꢂꢃꢄꢅꢆꢇꢈꢉꢅꢊꢋꢌꢍꢇꢃꢄꢅꢆꢄꢆꢇ./ꢌ$ꢇ.ꢅ!!ꢌꢄ!ꢇꢒꢃ'ꢓꢇMꢇ01ꢏꢅ!ꢄꢇꢙꢈꢃ..ꢚ

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DS21455D-page 27

TC7106/A/TC7107/A

NOTES:

DS21455D-page 28

TC7106/A/TC7107/A

APPENDIX A: REVISION HISTORY

Revision D (February 2008)

The following is the list of modifications.

1. Updated Section 11.0 “Packaging Informa-

tion”.

2.

3. Added Appendix A.

4. Updated the Product Identification System

page.

Revision C (April 2006)

The following is the list of modifications:

• Undocumented Changes.

Revision B (May 2002)

The following is the list of modifications:

• Undocumented Changes.

Revision A (April 2002)

• Original Release of this Document.

DS21455D-page 29

TC7106/A/TC7107/A

NOTES:

DS21455D-page 30

TC7106/A/TC7107/A

PRODUCT IDENTIFICATION SYSTEM

To order or obtain information, e.g., on pricing or delivery, refer to the factory or the listed sales office.

Examples:

PART NO.

Device

X

XX

XXX

a)

b)

c)

TC7106CLW:

3-3/4 A/D Converter,

44LD PLCC package.

3-3/4 A/D Converter,

40LD PDIP package.

3-3/4 A/D Converter,

44LD MQFP package,

Tape and Reel.

Temperature

Range

Package Tape &

Reel

TC7106CPL:

TC7106CKW713:

Device:

TC7106: 3-3/4 Digit A/D, with Frequency Counter and Probe

TC7106A: 3-3/4 Digit A/D, with Frequency Counter and Probe

TC7106: 3-3/4 Digit A/D, with Frequency Counter and Probe

TC7107A: 3-3/4 Digit A/D, with Frequency Counter and Probe

a)

b)

c)

TC7106ACLW:

TC7106ACPL:

3-3/4 A/D Converter,

44LD PLCC package.

3-3/4 A/D Converter,

40LD PDIP package.

3-3/4 A/D Converter,

44LD MQFP package,

Tape and Reel

Temperature Range:

Package:

C

I

=

0°C to +70°C

-25°C to +85°C

TC7106ACKW713:

LW

PL

KW

=

Plastic Leaded Chip Carrier (PLCC), 44-lead

Plastic DIP, (600 mil Body), 40-lead

Plastic Metric Quad Flatpack, (MQFP), 44-lead

a)

b)

c)

TC7107CLW:

TC7107CLP:

3-3/4 A/D Converter,

44LD PLCC package.

3-3/4 A/D Converter,

40LD PDIP package.

3-3/4 A/D Converter,

44LD MQFP package

Tape and Reel.

Tape & Reel:

713

=

Tape and Reel

TC7107CKW713:

a)

b)

c)

TC7107ACLW:

TC7107ACLP:

TC7107ACKW:

3-3/4 A/D Converter,

44LD PLCC package.

3-3/4 A/D Converter,

40LD PDIP package.

3-3/4 A/D Converter,

44LD MQFP package.

DS21455D-page 31

TC7106/A/TC7107/A

NOTES:

DS21455D-page 32

Note the following details of the code protection feature on Microchip devices:

•

Microchip products meet the specification contained in their particular Microchip Data Sheet.

•

Microchip believes that its family of products is one of the most secure families of its kind on the market today, when used in the

intended manner and under normal conditions.

•

There are dishonest and possibly illegal methods used to breach the code protection feature. All of these methods, to our

knowledge, require using the Microchip products in a manner outside the operating specifications contained in Microchip’s Data

Sheets. Most likely, the person doing so is engaged in theft of intellectual property.

•

Microchip is willing to work with the customer who is concerned about the integrity of their code.

Neither Microchip nor any other semiconductor manufacturer can guarantee the security of their code. Code protection does not

mean that we are guaranteeing the product as “unbreakable.”

Code protection is constantly evolving. We at Microchip are committed to continuously improving the code protection features of our

products. Attempts to break Microchip’s code protection feature may be a violation of the Digital Millennium Copyright Act. If such acts

allow unauthorized access to your software or other copyrighted work, you may have a right to sue for relief under that Act.

Information contained in this publication regarding device

applications and the like is provided only for your convenience

and may be superseded by updates. It is your responsibility to

ensure that your application meets with your specifications.

MICROCHIP MAKES NO REPRESENTATIONS OR

WARRANTIES OF ANY KIND WHETHER EXPRESS OR

IMPLIED, WRITTEN OR ORAL, STATUTORY OR

OTHERWISE, RELATED TO THE INFORMATION,

INCLUDING BUT NOT LIMITED TO ITS CONDITION,

QUALITY, PERFORMANCE, MERCHANTABILITY OR

FITNESS FOR PURPOSE. Microchip disclaims all liability

arising from this information and its use. Use of Microchip

devices in life support and/or safety applications is entirely at

the buyer’s risk, and the buyer agrees to defend, indemnify and

hold harmless Microchip from any and all damages, claims,

suits, or expenses resulting from such use. No licenses are

conveyed, implicitly or otherwise, under any Microchip

intellectual property rights.

Trademarks

The Microchip name and logo, the Microchip logo, Accuron,

dsPIC, KEELOQ, KEELOQ logo, MPLAB, PIC, PICmicro,

PICSTART, PRO MATE, rfPIC and SmartShunt are registered

trademarks of Microchip Technology Incorporated in the

U.S.A. and other countries.

FilterLab, Linear Active Thermistor, MXDEV, MXLAB,

SEEVAL, SmartSensor and The Embedded Control Solutions

Company are registered trademarks of Microchip Technology

Incorporated in the U.S.A.

Analog-for-the-Digital Age, Application Maestro, CodeGuard,

dsPICDEM, dsPICDEM.net, dsPICworks, dsSPEAK, ECAN,

ECONOMONITOR, FanSense, In-Circuit Serial

Programming, ICSP, ICEPIC, Mindi, MiWi, MPASM, MPLAB

Certified logo, MPLIB, MPLINK, mTouch, PICkit, PICDEM,

PICDEM.net, PICtail, PIC³²logo, PowerCal, PowerInfo,

PowerMate, PowerTool, REAL ICE, rfLAB, Select Mode, Total

Endurance, UNI/O, WiperLock and ZENA are trademarks of

Microchip Technology Incorporated in the U.S.A. and other

countries.

SQTP is a service mark of Microchip Technology Incorporated

in the U.S.A.

All other trademarks mentioned herein are property of their

respective companies.

Printed on recycled paper.

Microchip received ISO/TS-16949:2002 certification for its worldwide

headquarters, design and wafer fabrication facilities in Chandler and

Tempe, Arizona; Gresham, Oregon and design centers in California

and India. The Company’s quality system processes and procedures

are for its PIC^®MCUs and dsPIC^®DSCs, KEELOQ^®code hopping

devices, Serial EEPROMs, microperipherals, nonvolatile memory and

analog products. In addition, Microchip’s quality system for the design

and manufacture of development systems is ISO 9001:2000 certified.

DS21455D-page 33

WORLDWIDE SALES AND SERVICE

AMERICAS

ASIA/PACIFIC

EUROPE

Corporate Office

Asia Pacific Office

Suites 3707-14, 37th Floor

Tower 6, The Gateway

Harbour City, Kowloon

Hong Kong

Tel: 852-2401-1200

Fax: 852-2401-3431

India - Bangalore

Tel: 91-80-4182-8400

Fax: 91-80-4182-8422

Austria - Wels

Tel: 43-7242-2244-39

Fax: 43-7242-2244-393

2355 West Chandler Blvd.

Chandler, AZ 85224-6199

Tel: 480-792-7200

Fax: 480-792-7277

Technical Support:

http://support.microchip.com

Web Address:

www.microchip.com

Denmark - Copenhagen

Tel: 45-4450-2828

Fax: 45-4485-2829

India - New Delhi

Tel: 91-11-4160-8631

Fax: 91-11-4160-8632

France - Paris

Tel: 33-1-69-53-63-20

Fax: 33-1-69-30-90-79

India - Pune

Tel: 91-20-2566-1512

Fax: 91-20-2566-1513

Australia - Sydney

Tel: 61-2-9868-6733

Fax: 61-2-9868-6755

Atlanta

Duluth, GA

Tel: 678-957-9614

Fax: 678-957-1455

Germany - Munich

Tel: 49-89-627-144-0

Fax: 49-89-627-144-44

Japan - Yokohama

Tel: 81-45-471- 6166

Fax: 81-45-471-6122

China - Beijing

Tel: 86-10-8528-2100

Fax: 86-10-8528-2104

Italy - Milan

Tel: 39-0331-742611

Fax: 39-0331-466781

Korea - Daegu

Tel: 82-53-744-4301

Fax: 82-53-744-4302

Boston

China - Chengdu

Tel: 86-28-8665-5511

Fax: 86-28-8665-7889

Westborough, MA

Tel: 774-760-0087

Fax: 774-760-0088

Netherlands - Drunen

Tel: 31-416-690399

Fax: 31-416-690340

Korea - Seoul

China - Hong Kong SAR

Tel: 852-2401-1200

Fax: 852-2401-3431

Tel: 82-2-554-7200

Fax: 82-2-558-5932 or

82-2-558-5934

Chicago

Itasca, IL

Tel: 630-285-0071

Fax: 630-285-0075

Spain - Madrid

Tel: 34-91-708-08-90

Fax: 34-91-708-08-91

China - Nanjing

Tel: 86-25-8473-2460

Fax: 86-25-8473-2470

Malaysia - Kuala Lumpur

Tel: 60-3-6201-9857

Fax: 60-3-6201-9859

Dallas

Addison, TX

Tel: 972-818-7423

Fax: 972-818-2924

UK - Wokingham

Tel: 44-118-921-5869

Fax: 44-118-921-5820

China - Qingdao

Tel: 86-532-8502-7355

Fax: 86-532-8502-7205

Malaysia - Penang

Tel: 60-4-227-8870

Fax: 60-4-227-4068

Detroit

Farmington Hills, MI

Tel: 248-538-2250

Fax: 248-538-2260

China - Shanghai

Tel: 86-21-5407-5533

Fax: 86-21-5407-5066

Philippines - Manila

Tel: 63-2-634-9065

Fax: 63-2-634-9069

Kokomo

Kokomo, IN

Tel: 765-864-8360

Fax: 765-864-8387

China - Shenyang

Tel: 86-24-2334-2829

Fax: 86-24-2334-2393

Singapore

Tel: 65-6334-8870

Fax: 65-6334-8850

China - Shenzhen

Tel: 86-755-8203-2660

Fax: 86-755-8203-1760

Taiwan - Hsin Chu

Tel: 886-3-572-9526

Fax: 886-3-572-6459

Los Angeles

Mission Viejo, CA

Tel: 949-462-9523

Fax: 949-462-9608

China - Wuhan

Tel: 86-27-5980-5300

Fax: 86-27-5980-5118

Taiwan - Kaohsiung

Tel: 886-7-536-4818

Fax: 886-7-536-4803

Santa Clara

Santa Clara, CA

Tel: 408-961-6444

Fax: 408-961-6445

China - Xiamen

Tel: 86-592-2388138

Fax: 86-592-2388130

Taiwan - Taipei

Tel: 886-2-2500-6610

Fax: 886-2-2508-0102

Toronto

Mississauga, Ontario,

Canada

Tel: 905-673-0699

Fax: 905-673-6509

China - Xian

Tel: 86-29-8833-7252

Fax: 86-29-8833-7256

Thailand - Bangkok

Tel: 66-2-694-1351

Fax: 66-2-694-1350

China - Zhuhai

Tel: 86-756-3210040

Fax: 86-756-3210049

01/02/08

DS21455D-page 34


型号：	TC7106CLW
厂家：	MICROCHIP
描述：	3-1/2 Digit Analog-to-Digital Converters 转换器
文件：	总34页 (文件大小：411K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

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