TC7116CKW [MICROCHIP]
3-1/2 Digit Analog-to-Digital Converters with Hold; 3-1 / 2位模数转换与保持转换器型号: | TC7116CKW |
厂家: | MICROCHIP |
描述: | 3-1/2 Digit Analog-to-Digital Converters with Hold |
文件: | 总22页 (文件大小:549K) |
中文: | 中文翻译 | 下载: | 下载PDF数据表文档文件 |
TC7116/A/TC7117/A
3-1/2 Digit Analog-to-Digital Converters with Hold
Features
General Description
• Low Temperature Drift Internal Reference
- TC7116/TC7117 80 ppm/°C Typ.
- TC7116A/TC7117A 20 ppm/°C Typ.
• Display Hold Function
The TC7116A/TC7117A are 3-1/2 digit CMOS analog-
to-digital converters (ADCs) containing all the active
components necessary to construct a 0.05% resolution
measurement system. Seven-segment decoders,
polarity and digit drivers, voltage reference, and clock
circuit are integrated on-chip. The TC7116A drives liq-
uid crystal displays (LCDs) and includes a backplane
driver. The TC7117A drives common anode light emit-
ting diode (LED) displays directly with an 8mA drive
current per segment.
• Directly Drives LCD or LED Display
• Zero Reading with Zero Input
• Low Noise for Stable Display
- 2V or 200mV Full Scale Range (FSR)
• Auto-Zero Cycle Eliminates Need for Zero
• Adjustment Potentiometer
These devices incorporate a display hold (HLDR) func-
tion. The displayed reading remains indefinitely, as
long as HLDR is held high. Conversions continue, but
output data display latches are not updated. The refer-
• True Polarity Indication for Precision Null
Applications
• Convenient 9V Battery Operation:
(TC7116/TC7116A)
• High Impedance CMOS Differential Inputs: 1012Ω
ence low input (V
-) is not available, as it is with the
REF
TC7106/7107. V
- is tied internally to analog com-
REF
mon in the TC7116A/7117A devices.
• Low Power Operation: 10mW
The TC7116A/7117A 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
Applications
• Thermometry
12
offer 1pA leakage current and a 10 Ω input imped-
• Bridge Readouts: Strain Gauges, Load Cells,
Null Detectors
ance. The 15µV
noise performance enables a “rock
P-P
solid” reading. The auto-zero cycle ensures a zero dis-
play reading with a 0V input.
• Digital Meters: Voltage/Current/Ohms/Power, pH
• Digital Scales, Process Monitors
• Portable Instrumentation
The TC7116A and TC7117A feature a precision, low
drift internal reference, and are functionally identical to
the TC7116/TC7117. A low drift external reference is
not normally required with the TC7116A/TC7117A.
Device Selection Table
Package Code
Package
Temperature Range
CPL
IJL
40-Pin PDIP
40-Pin CERDIP
44-Pin PQFP
44-Pin PLCC
0°C to +70°C
-25°C to +85°C
0°C to +70°C
0°C to +70°C
CKW
CLW
2002 Microchip Technology Inc.
DS21457B-page 1
TC7116/A/TC7117/A
Package Type
40-Pin PDIP
40-Pin CERDIP
40
39
38
37
36
35
34
33
32
31
30
HLDR
OSC1
OSC2
OSC3
TEST
1
2
40
39
38
37
36
35
34
33
32
31
30
HLDR
OSC1
OSC2
OSC3
TEST
1
2
D
1
D
1
C
1
3
C
1
3
B
1
4
B
1
4
A
1
5
1's
V
+
A
1
5
1's
V
+
REF
REF
F
1
6
V+
C
F
1
6
V+
C
1
G
1
+
-
7
G
+
-
7
REF
REF
E
1
C
8
E
1
C
8
REF
REF
TC7116CPL
TC7116ACPL
TC7117CPL
TC7117ACPL
TC7116IJL
TC7116AIJL
TC7117IJL
TC7117AIJL
9
D
2
COMMON
9
D
2
COMMON
10
11
12
13
14
15
16
17
18
19
20
C
2
V
V
+
-
10
11
12
13
14
15
16
17
18
19
20
C
2
V
V
+
-
IN
IN
B
2
B
2
IN
IN
10's
10's
A
2
29 C
AZ
A
2
29 C
AZ
F
2
28
27
26
25
24
23
22
21
V
V
F
28
V
BUFF
2
BUFF
INT
E
2
E
2
27
V
INT
D
3
V-
G
26
D
3
V-
B
3
B
3
25
24
23
22
21
G
2
2
100's
100's
F
C
F
3
C
A
3
3
3
100's
100's
A
E
E
3
3
3
3
AB
G
1000's
AB
G
1000's
4
3
4
3
POL
(Minus Sign)
BP/GND
(TC7116/7117)
POL
(Minus Sign)
BP/GND
(TC7116/7117)
(TC7116A/TC7117A)
(TC7116A/TC7117A)
44-Pin PLCC
44-Pin PQFP
6
5
4
3
2
1
44 43 42 41 40
44 43 42 41 40 39 38 37 36 35 34
33
1
2
3
4
5
6
7
NC
NC
NC
F
G
E
7
39
38
37
36
35
34
33
32
31
30
29
V+
C
1
32 G
3
3
3
+
-
8
REF
1
C
31
30 A
TEST
OSC3
NC
C
9
REF
1
D
10
11
12
13
14
15
16
17
COMMON
2
29
28
27
26
25
24
23
G
3
C
V
+
TC7116CKW
TC7116ACKW
TC7117CKW
TC7117ACKW
2
IN
NC
TC7116CLW
TC7116ACLW
TC7117CLW
TC7117ACLW
BP/
OSC2
OSC1
NC
B2
GND
POL
V
-
IN
AB
4
HLDR 8
D
A
2
C
V
AZ
E
3
9
1
1
F
2
BUFF
INT
F
3
10
11
C
B
E
2
V
B
3
D
3
1
V-
25 26 27 28
19 20 21 22
12 13 14 15 16 17 18
18 19 20 21 22 23 24
Note 1: NC = No internal connection.
2: Pins 9, 25, 40 and 56 are connected to the die substrate. The potential at these pins is approximately V+. No external
connections should be made.
DS21457B-page 2
2002 Microchip Technology Inc.
TC7116/A/TC7117/A
Typical Application
TC7116/A
TC7117/A
Display
Hold
0.1µF
LCD Display (TC7116/7116A)
or Common Anode LED Display
(TC7117/7117A)
33
1
34
HLDR
-
REF
C
+ C
REF
1MΩ
31
Segment
2–19
+
V
+
IN
Drive
22–25
Analog
Input
–
0.01µF
20
POL
30
32
V
-
IN
Backplane Drive
Minus Sign
21
35
BP/GND
V+
ANALOG
COMMON
24kΩ
28
V
C
BUFF
+
47kΩ
V
9V
36
26
REF
0.47µF
29
V
+
REF
1kΩ
AZ
100mV
0.22µF
27
V
INT
V-
OSC2 OSC3 OSC1
39 38
To Analog
Common (Pin 32)
C
40
OSC
R
OSC
100pF
3 Conversions Per Second
100kΩ
2002 Microchip Technology Inc.
DS21457B-page 3
TC7116/A/TC7117/A
*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 Rating conditions for
extended periods may affect device reliability.
1.0
ELECTRICAL
CHARACTERISTICS
Absolute Maximum Ratings*
Supply Voltage:
TC7116/TC7116A (V+ to V-) ...........................15V
TC7117/TC7117A (V+ to GND) .......................+6V
V- to GND.........................................................-9V
Analog Input Voltage (Either Input) (Note 1)... V+ to V-
Reference Input Voltage (Either Input)............ V+ to V-
Clock Input:
TC7116/TC7116A............................... TEST to V+
TC7117/TC7117A.................................GND to V+
Package Power Dissipation; T ≤ 70°C (Note 2)
A
40-Pin CDIP ................................................2.29W
40-Pin PDIP ................................................1.23W
44-Pin PLCC ...............................................1.23W
44-Pin PQFP...............................................1.00W
Operating Temperature:
C (Commercial) Device ................... 0°C to +70°C
I (Commercial) Device.................... 0°C to +70°C
Storage Temperature..........................-65°C to +150°C
TC7116/A AND TC7117/A ELECTRICAL SPECIFICATIONS
Electrical Characteristics: Unless otherwise noted, specifications apply to both the TC7116/A and TC7117/A at TA = 25°C,
fCLOCK = 48kHz. Parts are tested in the circuit of the Typical Operating Circuit.
Symbol
Parameter
Zero Input Reading
Min
Typ
Max
Unit
Test Conditions
ZIR
—
±0
—
Digital VIN = 0V
Reading Full Scale = 200mV
Ratiometric Reading
999
-1
999/1000
±0.2
1000
+1
Digital VIN = VREF
Reading VREF = 100mV
R/O
Rollover Error (Difference in Reading for
Equal Positive and Negative
Counts VIN- = + VIN+ ≅ 200mV
or ≈ 2V
Readings Near Full Scale)
Linearity (Maximum Deviation from Best
Straight Line Fit)
-1
—
—
±0.2
50
+1
—
—
Counts Full Scale = 200mV or 2V
CMRR
eN
Common Mode Rejection Ratio
(Note 3)
µV/V
µV
VCM = ±1V, VIN = 0V
Full Scale = 200mV
Noise (Peak to Peak 95% of Time)
15
VIN = 0V
Full Scale = 200mV
IL
Leakage Current at Input
Zero Reading Drift
—
—
1
10
1
pA
VIN = 0V
0.2
µV/°C VIN = 0V
“C” Device = 0°C to +70°C
µV/°C “I” Device = -25°C to +85°C
—
1.0
2
Note 1: Input voltages may exceed the supply voltages provided the input current is limited to ±100µA.
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 conversion rate. Average DC component is less than 50mV.
5: The TC7116/TC7116A logic inputs have an internal pull-down resistor connected from HLDR, Pin 1 to TEST, Pin 37. The
TC7117/TC7117A logic inputs have an internal pull-down resistor connected from HLDR, Pin 1 to GND, Pin 21.
DS21457B-page 4
2002 Microchip Technology Inc.
TC7116/A/TC7117/A
TC7116/A AND TC7117/A ELECTRICAL SPECIFICATIONS (CONTINUED)
Electrical Characteristics: Unless otherwise noted, specifications apply to both the TC7116/A and TC7117/A at TA = 25°C,
CLOCK = 48kHz. Parts are tested in the circuit of the Typical Operating Circuit.
f
Symbol
Parameter
Min
Typ
Max
Unit
Test Conditions
TCSF
Scale Factor Temperature Coefficient
—
1
5
ppm/°C VIN = 199mV,
“C” Device = 0°C to +70°C
(Ext. Ref = 0ppm°C)
—
30
—
70
—
20
—
ppm/°C “I” Device = -25°C to +85°C
Input Resistance, Pin 1
VIL, Pin 1
kΩ
V
(Note 5)
—
Test + 1.5
GND + 1.5
—
TC7116/A Only
TC7117/A Only
Both
VIL, Pin 1
—
V+ - 1.5
—
V
VIH, Pin 1
—
V
IDD
Supply Current (Does not Include LED
Current for TC7117/A)
—
0.8
1.8
mA
VIN = 0V
VC
Analog Common Voltage
(with Respect to Positive Supply)
2.4
—
3.05
3.35
V
25kΩ Between Common
and Positive Supply
VCTC
Temperature Coefficient of Analog
Common (with Respect to Positive
Supply)
—
20
80
—
50
—
—
“C” Device: 0°C to +70°C
ppm/°C TC7116A/TC7117A
ppm/°C TC7116/TC7117
VSD
VBD
TC7116/TC7117A ONLY Peak to Peak
Segment Drive Voltage
4
4
5
5
5
8
6
V
V+ to V- = 9V
(Note 4)
TC7116A/TC7116A ONLY Peak to Peak
Backplane Drive Voltage
6
V
V+ to V- = 9V
(Note 4)
TC7117/TC7117A ONLY
Segment Sinking Current
(Except Pin 19)
—
mA
V+ = 5.0V
Segment Voltage = 3V
TC7117/TC7117A ONLY
10
16
—
mA
V+ = 5.0V
Segment Sinking Current (Pin 19 Only)
Segment Voltage = 3V
Note 1: Input voltages may exceed the supply voltages provided the input current is limited to ±100µA.
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 conversion rate. Average DC component is less than 50mV.
5: The TC7116/TC7116A logic inputs have an internal pull-down resistor connected from HLDR, Pin 1 to TEST, Pin 37. The
TC7117/TC7117A logic inputs have an internal pull-down resistor connected from HLDR, Pin 1 to GND, Pin 21.
2002 Microchip Technology Inc.
DS21457B-page 5
TC7116/A/TC7117/A
2.0
PIN DESCRIPTIONS
The descriptions of the pins are listed in Table 2-1.
TABLE 2-1:
PIN FUNCTION TABLE
Pin Number
(40-Pin PDIP)
(40-Pin CERDIP)
Pin Number
Symbol
Description
(44-Pin PQFP)
1
2
8
HLDR
D1
Hold pin, Logic 1 holds present display reading.
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.
9
3
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
C1
4
B1
5
A1
6
F1
7
G1
E1
8
9
D2
10
11
12
13
14
15
16
17
18
19
20
21
C2
B2
A2
F2
E2
D3
B3
F3
E3
AB4
POL
BP/
GND
LCD backplane drive output (TC7116/TC7116A). Digital ground
(TC7117/TC7117A).
22
23
24
25
26
27
29
30
31
32
34
35
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-
VINT
Integrator output. Connection point for integration capacitor.
See Section 4.3, Integrating Capacitor for more details.
28
29
36
37
VBUFF
CAZ
Integration resistor connection. Use a 47kΩ resistor for a 200mV full scale range
and a 470kΩ resistor for 2V full scale range.
The size of the auto-zero capacitor influences system noise. Use a 0.47µF
capacitor for 200mV full scale, and a 0.047µF capacitor for 2V full scale.
See Section 4.1, Auto-Zero Capacitor for more details.
30
31
32
38
39
40
VIN
VIN
-
The analog LOW input is connected to this pin.
+
The analog HIGH input signal is connected to this pin.
COMMON This pin is primarily used to set the Analog Common mode voltage for battery
operation, or in systems where the input signal is referenced to the power supply.
It also acts as a reference voltage source. See Section 3.1.6, Analog Common
for more details.
33
34
41
42
CREF
CREF
-
See Pin 34.
+
A 0.1µF capacitor is used in most applications. If a large Common mode voltage
exists (for example, the VIN- pin is not at analog common), and a 200mV scale is
used, a 1µF capacitor is recommended and will hold the rollover error to
0.5 count.
DS21457B-page 6
2002 Microchip Technology Inc.
TC7116/A/TC7117/A
TABLE 2-1:
PIN FUNCTION TABLE (CONTINUED)
Pin Number
(40-Pin PDIP)
(40-Pin CERDIP)
Pin Number
Symbol
Description
(44-Pin PQFP)
35
36
43
44
V+
Positive Power Supply Voltage.
VREF
+
The analog input required to generate a full scale output (1999 counts). Place
100mV between Pins 32 and 36 for 199.9mV full scale. Place 1V between
Pins 35 and 36 for 2V full scale. See Section 4.6, Reference Voltage.
37
3
TEST
Lamp test. When pulled HIGH (to V+), all segments will be turned on and the dis-
play should read -1888. It may also be used as a negative supply for externally
generated decimal points. See Section 3.1.7, TEST for additional information.
38
39
40
4
6
7
OSC3
OSC2
OSC1
See Pin 40.
See Pin 40.
Pins 40, 39, 38 make up the oscillator section. For a 48kHz clock (3 readings per
section), connect Pin 40 to the junction of a 100kΩ resistor and a 100pF capaci-
tor. The 100kΩ resistor is tied to Pin 39 and the 100pF capacitor is tied to Pin 38.
3.1.2
SIGNAL INTEGRATE PHASE
3.0
DETAILED DESCRIPTION
The auto-zero loop is opened, the internal short is
removed, and the internal high and low inputs are con-
nected to the external pins. The converter then inte-
(All Pin Designations Refer to 40-Pin PDIP.)
3.1
Analog Section
grates the differential voltages between V + and V
-
IN
IN
Figure 3-1 shows the block diagram of the analog sec-
tion for the TC7116/TC7116A and TC7117/TC7117A.
Each measurement cycle is divided into three phases:
(1) Auto-Zero (AZ), (2) Signal Integrate (INT), and
(3) Reference Integrate (REF), or De-integrate (DE).
for a fixed time. This differential voltage can be within a
wide Common mode range: 1V of either supply. How-
ever, if the input signal has no return with respect to the
converter power supply, V - can be tied to analog
IN
common to establish the correct Common mode volt-
age. At the end of this phase, the polarity of the
integrated signal is determined.
3.1.1
AUTO-ZERO PHASE
High and low inputs are disconnected from the pins and
internally shorted to analog common. The reference
capacitor is charged to the reference voltage. A feed-
back loop is closed around the system to charge the
auto-zero capacitor (C ) to compensate for offset volt-
AZ
ages in the buffer amplifier, integrator, and comparator.
Since the comparator is included in the loop, AZ accu-
racy is limited only by system noise. The offset referred
to the input is less than 10µV.
2002 Microchip Technology Inc.
DS21457B-page 7
TC7116/A/TC7117/A
FIGURE 3-1:
ANALOG SECTION OF TC7116/TC7117A AND TC7117/TC7117A
C
C
V
AZ
INT
R
C
+
INT
V+
35
REF
C
REF
+
V
C
-
V
BUFF
REF
INT
REF
Auto-Zero
29
34
36
33
28
27
V+
–
+
Integrator
AZ
10µA
Low
Temp.
Drift
–
+
+
To
Digital
Section
31
V
IN
+
DE
(–±
DE
(+±
INT
AZ
Zener
AZ
–
+
V
REF
Comparator
DE (+±
AZ & DE (± ±
32
30
DE (–±
TC7116
TC7116A
TC7117
Analog
Common
V+ -3V
V
-
IN
TC7117A
26
INT
V-
3.1.3
REFERENCE INTEGRATE PHASE
3.1.6
ANALOG COMMON
The final phase is reference integrate, or de-integrate.
Input low is internally connected to analog common
and input high 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. The time required for the output to return to
zero is proportional to the input signal. The digital
reading displayed is:
This pin is included primarily to set the Common mode
voltage for battery operation (TC7116/TC7116A), or for
any system where the input signals are floating, with
respect to the power supply. The analog common pin
sets a voltage approximately 2.8V more negative than
the positive supply. This is selected to give a minimum
end of life battery voltage of about 6V. However, analog
common has some attributes of a reference voltage.
When the total supply voltage is large enough to cause
the zener to regulate (>7V), the analog common volt-
age will have a low voltage coefficient (0.001%), low
output impedance (≅15Ω), and a temperature coeffi-
cient of less than 20ppm/°C, typically, and 50 ppm max-
imum. The TC7116/TC7117 temperature coefficients
are typically 80ppm/°C.
EQUATION 3-1:
V
IN
1000 =
V
REF
3.1.4
REFERENCE
An external reference may be used, if necessary, as
shown in Figure 3-2.
The positive reference voltage (V
analog common.
+) is referred to
REF
FIGURE 3-2:
USING AN EXTERNAL
REFERENCE
3.1.5
DIFFERENTIAL INPUT
This input can accept differential voltages anywhere
within the Common mode range of the input amplifier
or, specifically, from 1V below the positive supply to 1V
above the negative supply. In this range, the system
has a CMRR of 86dB, typical. However, since the inte-
grator also swings with the Common mode voltage,
care must be exercised to ensure that the integrator
output does not saturate. A worst case condition would
be a large, positive Common mode voltage with a near
full scale negative differential input voltage. The nega-
tive input signal drives the integrator positive, when
most of its swing has been used up by the positive
Common mode voltage. For these critical applications,
the integrator swing can be reduced to less than the
recommended 2V full scale swing with little loss of
accuracy. The integrator output can swing within 0.3V
of either supply without loss of linearity.
V+
V+
6.8kΩ
TC7116
TC7116A
TC7117
TC7117A
20kΩ
V
+
REF
1.2V REF
COMMON
DS21457B-page 8
2002 Microchip Technology Inc.
TC7116/A/TC7117/A
Analog common is also used as V - return during
FIGURE 3-4:
EXCLUSIVE “OR” GATE
FOR DECIMAL POINT
DRIVE
IN
auto-zero and de-integrate. If V - is different from ana-
IN
log common, a Common mode voltage exists in the
system and is taken care of by the excellent CMRR of
the converter. However, in some applications, V - will
V+
IN
be set at a fixed, known voltage (power supply common
for instance). In this application, analog common
should be tied to the same point, thus removing the
Common mode voltage from the converter. The same
holds true for the reference voltage; if it can be conve-
niently referenced to analog common, it should be.
This removes the Common mode voltage from the
reference system.
V+
BP
TC7116
TC7116A
To LCD
Decimal
Point
Decimal
Point
Select
4030
GND
Within the IC, analog common is tied to an N-channel
FET, that can sink 30mA or more of current to hold the
voltage 3V below the positive supply (when a load is
trying to pull the analog common line positive). How-
ever, there is only 10µA of source current, so analog
common may easily be tied to a more negative voltage,
thus overriding the internal reference.
TEST
3.2
Digital Section
Figure 3-5 and Figure 3-6 show the digital section for
TC7116/TC7116A and TC7117/TC7117A, respectively.
For the TC7116/TC7116A (Figure 3-5), an internal dig-
ital ground is generated from a 6V zener diode and a
large P-channel source follower. This supply is made
stiff to absorb the relative large capacitive currents
when the backplane (BP) voltage is switched. The BP
frequency is the clock frequency 4800. For 3 readings
per second, this is a 60Hz square wave with a nominal
amplitude of 5V. The segments are driven at the same
frequency and amplitude, and are in phase with BP
when OFF, but out of phase when ON. In all cases,
negligible DC voltage exists across the segments.
3.1.7
TEST
The TEST pin serves two functions. On the TC7117/
TC7117A, it is coupled to the internally generated digi-
tal supply through a 500Ω resistor. Thus, it can be used
as a negative supply for externally generated segment
drivers, such as decimal points, or any other presenta-
tion the user may want to include on the LCD.
(Figure 3-3 and Figure 3-4 show such an application.)
No more than a 1mA load should be applied.
The second function is a "lamp test." When TEST is
pulled HIGH (to V+), all segments will be turned ON
and the display should read -1888. The TEST pin will
sink about 10mA under these conditions.
Figure 3-6 is the digital section of the TC7117/
TC7117A. It is identical to the TC7116/TC7116A,
except that the regulated supply and BP drive have
been eliminated, and the segment drive is typically
8mA. The 1000's output (Pin 19) sinks current from two
LED segments, and has a 16mA drive capability. The
TC7117/TC7117A are designed to drive common
anode LED displays.
FIGURE 3-3:
SIMPLE INVERTER FOR
FIXED DECIMAL POINT
V+
V+
In both devices, the polarity indication is ON for analog
inputs. If V - and V + are reversed, this indication can
be reversed also, if desired.
IN
IN
TC7116
TC7116A
4049
BP
To LCD
Decimal
21
37
Point
GND
TEST
To LCD
Backplane
2002 Microchip Technology Inc.
DS21457B-page 9
TC7116/A/TC7117/A
FIGURE 3-5:
TC7116/TC7116A DIGITAL SECTION
TC7116
TC7116A
Backplane
21
LCD Phase Driver
Typical Segment Output
0.5mA
V+
7-Segment
Decode
7-Segment
Decode
7-Segment
Decode
÷
200
Segment
Output
Latch
Tens
2mA
Internal Digital Ground
Units
Hundreds
Thousands
To Switch Drivers
From Comparator Output
35
37
V+
~70kΩ
= 1V
Clock
6.2V
500Ω
÷
4
Logic Control
TEST
V-
V
TH
26
Internal Digital Ground
40
39
38
1
OSC1
OSC2
OSC3
HLDR
To achieve maximum rejection of 60Hz pickup, the sig-
nal integrate cycle should be a multiple of 60Hz. Oscil-
lator frequencies of 240kHz, 120kHz, 80kHz, 60kHz,
48kHz, 40kHz, etc. should be selected. For 50Hz rejec-
tion, oscillator frequencies of 200kHz, 100kHz,
66-2/3kHz, 50kHz, 40kHz, etc. would be suitable. Note
that 40kHz (2.5 readings per second) will reject both
50Hz and 60Hz.
3.2.1
SYSTEM TIMING
The clocking method used for the TC7116/TC7116A
and TC7117/TC7117A is shown in Figure 3-6. Three
clocking methods may be used:
1. An external oscillator connected to Pin 40.
2. A crystal between Pins 39 and 40.
3. An RC network using all three pins.
The oscillator frequency is ÷4 before it clocks the
decade counters. It is then further divided to form the
three convert cycle phases: Signal Integrate (1000
counts), Reference De-integrate (0 to 2000 counts),
and Auto-Zero (1000 to 3000 counts). For signals less
than full scale, auto-zero gets the unused portion of ref-
erence de-integrate. This makes a complete measure
cycle of 4000 (16,000 clock pulses), independent of
input voltage. For 3 readings per second, an oscillator
frequency of 48kHz would be used.
3.2.2
HOLD READING INPUT
When HLDR is at a logic HIGH, the latch will not be
updated. Analog-to-digital conversions will continue,
but will not be updated until HLDR is returned to LOW.
To continuously update the display, connect to TEST
(TC7116/TC7116A) or GROUND (TC7117/TC7117A),
or disconnect. This input is CMOS compatible with
70kΩ typical resistance to TEST (TC7116/TC7116A) or
GROUND (TC7117/TC7117A).
DS21457B-page 10
2002 Microchip Technology Inc.
TC7116/A/TC7117/A
FIGURE 3-6:
TC7117/TC711A DIGITAL SECTION
TC7117
TC7117A
Typical Segment Output
V+
7-Segment 7-Segment
7-Segment
Decode
0.5mA
Decode
Decode
To
Segment
8mA
Latch
Digital Ground
Internal Digital Ground
Units
Thousands
Hundreds
Tens
To Switch Drivers
From Comparator Output
V+
35
37
V+
TEST
Clock
÷
4
Control Logic
500Ω
21
Digital
GND
40
OSC1
39
OSC2
38
OSC3
1
~70kΩ
HLDR
2002 Microchip Technology Inc.
DS21457B-page 11
TC7116/A/TC7117/A
4.6
Reference Voltage
4.0
COMPONENT VALUE
SELECTION
To generate full scale output (2000 counts), the analog
input requirement is V = 2V . Thus, for the 200mV
and 2V scale, V
IN
REF
4.1
Auto-Zero Capacitor
should equal 100mV and 1V,
REF
respectively. In many applications, where the ADC is
connected to a transducer, a scale factor exists
between the input voltage and the digital reading. For
instance, in a measuring system, the designer might like
to have a full scale reading when the voltage from the
transducer is 700mV. Instead of dividing the input down
to 200mV, the designer should use the input voltage
The size of the auto-zero capacitor has some influence
on system noise. For 200mV full scale, where noise is
very important, a 0.47µF capacitor is recommended.
On the 2V scale, a 0.047µF capacitor increases the
speed of recovery from overload and is adequate for
noise on this scale.
directly and select V
= 350mV. Suitable values for
REF
4.2
Reference Capacitor
integrating resistor and capacitor would be 120kW and
0.22µF. This makes the system slightly quieter and also
avoids a divider network on the input. The TC7117/
TC7117A, with ±5V supplies, can accept input signals
up to ±4V. Another advantage of this system is when a
A 0.1µF capacitor is acceptable in most applications.
However, where a large Common mode voltage exists
(i.e., the V - pin is not at analog common), and a
200mV scale is used, a larger value is required to pre-
vent rollover error. Generally, 1µF will hold the rollover
error to 0.5 count in this instance.
IN
digital reading of zero is desired for V ≠ 0. Tempera-
IN
ture and weighing systems with a variable tare are
examples. This offset reading can be conveniently gen-
erated by connecting the voltage transducer between
4.3
Integrating Capacitor
V
+ and analog common, and the variable (or fixed)
IN
The integrating capacitor should be selected to give the
maximum voltage swing that ensures tolerance buildup
will not saturate the integrator swing (approximately
0.3V from either supply). In the TC7116/TC7116A or
the TC7117/TC7117A, when the analog common is
used as a reference, a nominal ±2V full scale integrator
swing is acceptable. For the TC7117/TC7117A, with
±5V supplies and analog common tied to supply
ground, a ±3.5V to ±4V swing is nominal. For 3 read-
offset voltage between analog common and V -.
IN
5.0
TC7117/TC7117A POWER
SUPPLIES
The TC7117/TC7117A are designed to operate from
±5V supplies. However, if a negative supply is not avail-
able, it can be generated with a TC7660 DC-to-DC con-
verter and two capacitors. Figure 5-1 shows this
application.
ings per second (48kHz clock), nominal values for C
INT
are 0.22µ1F and 0.10µF, respectively. If different oscil-
lator frequencies are used, these values should be
changed in inverse proportion to maintain the output
swing. The integrating capacitor must have low dielec-
tric absorption to prevent rollover errors. Polypropylene
capacitors are recommended for this application.
In selected applications, a negative supply is not
required. The conditions for using a single +5V supply
are:
1. The input signal can be referenced to the center
of the Common mode range of the converter.
2. The signal is less than ±1.5V.
3. An external reference is used.
4.4
Integrating Resistor
Both the buffer amplifier and the integrator have a class
A output stage with 100µA of quiescent current. They
can supply 20µA of drive current with negligible non-
linearity. The integrating resistor should be large
enough to remain in this very linear region over the
input voltage range, but small enough that undue leak-
age requirements are not placed on the PC board. For
2V full scale, 470kΩ is near optimum and, similarly,
47kΩ for 200mV full scale.
FIGURE 5-1:
NEGATIVE POWER
SUPPLY GENERATION
WITH TC7660
+5V
35
V+
36
V
+
REF
LED
Drive
32
31
COM
4.5
Oscillator Components
TC7117
TC7117A
+
V
+
For all frequency ranges, a 100kΩ resistor is recom-
mended; the capacitor is selected from the equation:
IN
V
IN
30
21
V
-
IN
8
–
2
EQUATION 4-1:
GND
+
10µF
4
V-
26
TC7660
0.45
5
(-5V)
f = -----------
RC
3
+
10µF
For a 48kHz clock (3 readings per second), C = 100pF.
DS21457B-page 12
2002 Microchip Technology Inc.
TC7116/A/TC7117/A
In addition to limiting maximum power dissipation, the
resistor reduces change in power dissipation as the
display changes. The 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 seg-
ments (a “111” display) to worst case (a “1888” display),
the resistor circuit will change about 230mW, while a
circuit without the resistor will change about 470mW.
Therefore, the resistor will reduce the effect of display
dissipation on reference voltage drift by about 50%.
6.0
TYPICAL APPLICATIONS
The TC7117/TC7117A sink the LED display current,
causing heat to build up in the IC package. If the inter-
nal voltage reference is used, the changing chip tem-
perature can cause the display to change reading. By
reducing the LED common anode voltage, the TC7117/
TC7117A package power dissipation is reduced.
Figure 6-1 is a curve tracer display showing the rela-
tionship between output current and output voltage for
typical TC7117CPL/TC7117ACPL devices. Since a
typical LED has 1.8V across it at 8mA and its common
anode is connected to +5V, the TC7117/TC7117A out-
put is at 3.2V (Point A, Figure 6-1). Maximum power
dissipation is 8.1mA x 3.2V x 24 segments = 622mW.
The change in LED brightness caused by the resistor is
almost unnoticeable as more segments turn off. If dis-
play brightness remaining steady is very important to
the designer, a diode may be used instead of the
resistor.
However, notice that once the TC7117/TC7117A's out-
put voltage is above 2V, the LED current is essentially
constant as output voltage increases. Reducing the
output voltage by 0.7V (Point B Figure 6-1) results in
7.7mA of LED current, only a 5% reduction. Maximum
power dissipation is now only 7.7mA x 2.5V x 24 =
462mW, a reduction of 26%. An output voltage reduc-
tion of 1V (Point C) reduces LED current by 10%
(7.3mA), but power dissipation by 38% (7.3mA x 2.2V
x 24 = 385mW).
FIGURE 6-2:
DIODE OR RESISTOR
LIMITS PACKAGE POWER
DISSIPATION
In
-5V
+5V
+
–
1MΩ
TP3
24kΩ
150kΩ
1kΩ
0.47
µF
0.22
µF
100
pF
0.01
µF
TP5
TP2
TP1
0.1
µF
Display
FIGURE 6-1:
TC7117/TC7117A OUTPUT
VS. OUTPUT VOLTAGE
100
47
kΩ
kΩ
40
1
35
30
TP
21
10.000
9.000
8.000
4
TC7117
TC7117A
10
20
A
Display
B
1.5W, 1/4Ω
C
1N4001
7.000
6.000
2.00
2.50
3.00
3.50
4.00
Output Voltage (V)
Reduced power dissipation is very easy to obtain.
Figure 6-2 shows two ways: either a 5.1Ω, 1/4W resis-
tor, or a 1A diode placed in series with the display (but
not in series with the TC7117/TC7117A). The resistor
reduces the TC7117/TC7117A's output voltage (when
all 24 segments are ON) to Point C of Figure 6-1. When
segments turn off, the output voltage will increase. The
diode, however, will result in a relatively steady output
voltage, around Point B.
2002 Microchip Technology Inc.
DS21457B-page 13
TC7116/A/TC7117/A
FIGURE 6-3:
TC7116/TC7117A USING THE INTERNAL REFERENCE
(200mV FULL SCALE, 3 READINGS PER SECOND - RPS)
Set V
REF
= 100mV
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
100kΩ
100pF
22kΩ
1MΩ
0.1pF
1kΩ
+
In
0.01µF
47kΩ
TC7116
TC7116A
+
0.47µF
–
9V
–
0.22µF
To Display
To Backplane
FIGURE 6-4:
TC7117/TC7117A INTERNAL REFERENCE
(200mV FULL SCALE, 3 RPS, V - TIED TO GND FOR SINGLE ENDED INPUTS)
IN
Set V
= 100mV
REF
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
100kΩ
100pF
22kΩ
1MΩ
+5V
1kΩ
0.1pF
+
In
0.01µF
47kΩ
TC7117
TC7117A
0.47µF
–
0.22µF
-5V
To Display
DS21457B-page 14
2002 Microchip Technology Inc.
TC7116/A/TC7117/A
FIGURE 6-5:
CIRCUIT FOR DEVELOPING UNDER RANGE AND OVER RANGE SIGNALS
FROM TC7116/TC7117A OUTPUTS
V+
40
To Logic V
CC
35
To Logic
GND
TC7116
TC7116A
26
V-
O/R
U/R
20
21
CD4023
or 74C10
CD4077 O/R = Over Range
U/R = Under Range
FIGURE 6-6:
TC7117/TC7117A WITH A 1.2 EXTERNAL BANDGAP REFERENCE
(V - TIED TO COMMON)
IN
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
100kΩ
Set V
= 100mV
REF
100pF
10kΩ
10kΩ
V+
1kΩ
0.1pF
+
1.2V
In
0.01µF
47kΩ
1MΩ
TC7117
TC7117A
0.47µF
0.22µF
–
To Display
2002 Microchip Technology Inc.
DS21457B-page 15
TC7116/A/TC7117/A
FIGURE 6-7:
RECOMMENDED COMPONENT VALUES FOR 2V FULL SCALE
(TC7116/TC7116A AND TC7117/TC7117A)
Set V
= 1V
REF
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
100kΩ
100pF
24kΩ
1MΩ
V+
0.1µF
25kΩ
+
TC7116
TC7116A
TC7117
In
0.01µF
470kΩ
0.047µF
–
TC7117A
0.22µF
V-
To Display
FIGURE 6-8:
TC7117/TC7117A OPERATED FROM SINGLE +5V SUPPLY
(AN EXTERNAL REFERENCE MUST BE USED IN THIS APPLICATION)
40
100kΩ
Set V
= 100mV
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
REF
100pF
10kΩ
10kΩ
V+
1kΩ
0.1pF
+
1.2V
In
0.01µF
47kΩ
1MΩ
TC7117
TC7117A
0.47µF
0.22µF
–
To Display
DS21457B-page 16
2002 Microchip Technology Inc.
TC7116/A/TC7117/A
7.0
7.1
PACKAGING INFORMATION
Package Marking Information
Package marking data not available at this time.
7.2
Taping Form
Component Taping Orientation for 44-Pin PLCC Devices
User Direction of Feed
PIN 1
W
P
Standard Reel Component Orientation
for TR Suffix Device
Carrier Tape, Number of Components Per Reel and Reel Size
Package
Carrier Width (W)
Pitch (P)
Part Per Full Reel
Reel Size
44-Pin PLCC
32 mm
24 mm
500
13 in
Note: Drawing does not represent total number of pins.
Component Taping Orientation for 44-Pin PQFP Devices
User Direction of Feed
PIN 1
W
P
Standard Reel Component Orientation
for TR Suffix Device
Carrier Tape, Number of Components Per Reel and Reel Size
Package
Carrier Width (W)
Pitch (P)
Part Per Full Reel
Reel Size
44-Pin PQFP
24 mm
16 mm
500
13 in
Note: Drawing does not represent total number of pins.
2002 Microchip Technology Inc.
DS21457B-page 17
TC7116/A/TC7117/A
7.3
Package Dimensions
40-Pin PDIP (Wide)
PIN 1
.555 (14.10)
.530 (13.46)
2.065 (52.45)
2.027 (51.49)
.610 (15.49)
.590 (14.99)
.200 (5.08)
.140 (3.56)
.040 (1.02)
.020 (0.51)
.015 (0.38)
.008 (0.20)
.150 (3.81)
.115 (2.92)
3° MIN.
.700 (17.78)
.610 (15.50)
.110 (2.79)
.090 (2.29)
.070 (1.78)
.045 (1.14)
.022 (0.56)
.015 (0.38)
Dimensions: inches (mm)
40-Pin CERDIP (Wide)
PIN 1
.540 (13.72)
.510 (12.95)
.098 (2.49) MAX.
.030 (0.76) MIN.
2.070 (52.58)
2.030 (51.56)
.620 (15.75)
.590 (15.00)
.060 (1.52)
.020 (0.51)
.210 (5.33)
.170 (4.32)
.015 (0.38)
.008 (0.20)
3° MIN.
.150 (3.81)
MIN.
.200 (5.08)
.125 (3.18)
.700 (17.78)
.620 (15.75)
.020 (0.51)
.016 (0.41)
.110 (2.79)
.090 (2.29)
.065 (1.65)
.045 (1.14)
Dimensions: inches (mm)
DS21457B-page 18
2002 Microchip Technology Inc.
TC7116/A/TC7117/A
7.3
Package Dimensions (Continued)
44-Pin PLCC
PIN 1
.021 (0.53)
.013 (0.33)
.050 (1.27) TYP.
.695 (17.65)
.685 (17.40)
.630 (16.00)
.591 (15.00)
.656 (16.66)
.650 (16.51)
.032 (0.81)
.026 (0.66)
.020 (0.51) MIN.
.656 (16.66)
.650 (16.51)
.120 (3.05)
.090 (2.29)
.695 (17.65)
.685 (17.40)
.180 (4.57)
.165 (4.19)
Dimenisons: inches (mm)
44-Pin PQFP
7° MAX.
.009 (0.23)
.005 (0.13)
PIN 1
.041 (1.03)
.026 (0.65)
.018 (0.45)
.012 (0.30)
.398 (10.10)
.390 (9.90)
.557 (14.15)
.537 (13.65)
.031 (0.80) TYP.
.010 (0.25) TYP.
.398 (10.10)
.390 (9.90)
.083 (2.10)
.075 (1.90)
.557 (14.15)
.537 (13.65)
.096 (2.45) MAX.
Dimenisons: inches (mm)
2002 Microchip Technology Inc.
DS21457B-page 19
TC7116/A/TC7117/A
PRODUCT IDENTIFICATION SYSTEM
To order or obtain information, e.g., on pricing or delivery, refer to the factory or the listed sales office.
PART CODE
6 = LCD
7 = LED
TC711X X X XXX
}
A or blank*
R (reversed pins) or blank (CPL pkg only)
* "A" parts have an improved reference TC
Package Code (see Device Selection Table)
SALES AND SUPPORT
Data Sheets
Products supported by a preliminary Data Sheet may have an errata sheet describing minor operational differences and recom-
mended workarounds. To determine if an errata sheet exists for a particular device, please contact one of the following:
1. Your local Microchip sales office
2. The Microchip Corporate Literature Center U.S. FAX: (480) 792-7277
3. The Microchip Worldwide Site (www.microchip.com)
Please specify which device, revision of silicon and Data Sheet (include Literature #) you are using.
New Customer Notification System
Register on our web site (www.microchip.com/cn) to receive the most current information on our products.
DS21457B-page 20
2002 Microchip Technology Inc.
TC7116/ATC7117/A
Information contained in this publication regarding device
applications and the like is intended through suggestion only
and may be superseded by updates. It is your responsibility to
ensure that your application meets with your specifications.
No representation or warranty is given and no liability is
assumed by Microchip Technology Incorporated with respect
to the accuracy or use of such information, or infringement of
patents or other intellectual property rights arising from such
use or otherwise. Use of Microchip’s products as critical com-
ponents in life support systems is not authorized except with
express written approval by Microchip. No licenses are con-
veyed, implicitly or otherwise, under any intellectual property
rights.
Trademarks
The Microchip name and logo, the Microchip logo, FilterLab,
KEELOQ, microID, MPLAB, PIC, PICmicro, PICMASTER,
PICSTART, PRO MATE, SEEVAL and The Embedded Control
Solutions Company are registered trademarks of Microchip Tech-
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dsPIC, ECONOMONITOR, FanSense, FlexROM, fuzzyLAB,
In-Circuit Serial Programming, ICSP, ICEPIC, microPort,
Migratable Memory, MPASM, MPLIB, MPLINK, MPSIM,
MXDEV, PICC, PICDEM, PICDEM.net, rfPIC, Select Mode
and Total Endurance are trademarks of Microchip Technology
Incorporated in the U.S.A.
Serialized Quick Turn Programming (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.
© 2002, Microchip Technology Incorporated, Printed in the
U.S.A., All Rights Reserved.
Printed on recycled paper.
Microchip received QS-9000 quality system
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and Mountain View, California in March 2002.
The Company’s quality system processes and
procedures are QS-9000 compliant for its
PICmicro® 8-bit MCUs, KEELOQ® code hopping
devices, Serial EEPROMs, microperipherals,
non-volatile memory and analog products. In
addition, Microchip’s quality system for the
design and manufacture of development
systems is ISO 9001 certified.
2002 Microchip Technology Inc.
DS21457B-page 21
WORLDWIDE SALES AND SERVICE
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2355 West Chandler Blvd.
Chandler, AZ 85224-6199
Tel: 480-792-7966 Fax: 480-792-7456
Microchip Technology Consulting (Shanghai)
Co., Ltd., Beijing Liaison Office
Unit 915
Bei Hai Wan Tai Bldg.
Atlanta
500 Sugar Mill Road, Suite 200B
Atlanta, GA 30350
Tel: 770-640-0034 Fax: 770-640-0307
Boston
2 Lan Drive, Suite 120
Westford, MA 01886
Tel: 978-692-3848 Fax: 978-692-3821
Tel: 82-2-554-7200 Fax: 82-2-558-5934
Singapore
Microchip Technology Singapore Pte Ltd.
200 Middle Road
#07-02 Prime Centre
No. 6 Chaoyangmen Beidajie
Beijing, 100027, No. China
Tel: 86-10-85282100 Fax: 86-10-85282104
China - Chengdu
Microchip Technology Consulting (Shanghai)
Co., Ltd., Chengdu Liaison Office
Rm. 2401, 24th Floor,
Ming Xing Financial Tower
No. 88 TIDU Street
Singapore, 188980
Tel: 65-6334-8870 Fax: 65-6334-8850
Taiwan
Microchip Technology Taiwan
11F-3, No. 207
Tung Hua North Road
Taipei, 105, Taiwan
Tel: 886-2-2717-7175 Fax: 886-2-2545-0139
Chicago
333 Pierce Road, Suite 180
Itasca, IL 60143
Chengdu 610016, China
Tel: 86-28-6766200 Fax: 86-28-6766599
Tel: 630-285-0071 Fax: 630-285-0075
China - Fuzhou
Dallas
Microchip Technology Consulting (Shanghai)
Co., Ltd., Fuzhou Liaison Office
Unit 28F, World Trade Plaza
No. 71 Wusi Road
Fuzhou 350001, China
4570 Westgrove Drive, Suite 160
Addison, TX 75001
EUROPE
Denmark
Microchip Technology Nordic ApS
Regus Business Centre
Lautrup hoj 1-3
Ballerup DK-2750 Denmark
Tel: 45 4420 9895 Fax: 45 4420 9910
Tel: 972-818-7423 Fax: 972-818-2924
Detroit
Tri-Atria Office Building
32255 Northwestern Highway, Suite 190
Farmington Hills, MI 48334
Tel: 248-538-2250 Fax: 248-538-2260
Tel: 86-591-7503506 Fax: 86-591-7503521
China - Shanghai
Microchip Technology Consulting (Shanghai)
Co., Ltd.
Room 701, Bldg. B
Far East International Plaza
No. 317 Xian Xia Road
Shanghai, 200051
Tel: 86-21-6275-5700 Fax: 86-21-6275-5060
Kokomo
France
2767 S. Albright Road
Kokomo, Indiana 46902
Tel: 765-864-8360 Fax: 765-864-8387
Los Angeles
Microchip Technology SARL
Parc d’Activite du Moulin de Massy
43 Rue du Saule Trapu
Batiment A - ler Etage
91300 Massy, France
Tel: 33-1-69-53-63-20 Fax: 33-1-69-30-90-79
Germany
Microchip Technology GmbH
Gustav-Heinemann Ring 125
D-81739 Munich, Germany
Tel: 49-89-627-144 0 Fax: 49-89-627-144-44
18201 Von Karman, Suite 1090
Irvine, CA 92612
Tel: 949-263-1888 Fax: 949-263-1338
China - Shenzhen
Microchip Technology Consulting (Shanghai)
Co., Ltd., Shenzhen Liaison Office
Rm. 1315, 13/F, Shenzhen Kerry Centre,
Renminnan Lu
Shenzhen 518001, China
Tel: 86-755-2350361 Fax: 86-755-2366086
New York
150 Motor Parkway, Suite 202
Hauppauge, NY 11788
Tel: 631-273-5305 Fax: 631-273-5335
San Jose
Microchip Technology Inc.
2107 North First Street, Suite 590
San Jose, CA 95131
Tel: 408-436-7950 Fax: 408-436-7955
Toronto
Hong Kong
Italy
Microchip Technology Hongkong Ltd.
Unit 901-6, Tower 2, Metroplaza
223 Hing Fong Road
Kwai Fong, N.T., Hong Kong
Tel: 852-2401-1200 Fax: 852-2401-3431
Microchip Technology SRL
Centro Direzionale Colleoni
Palazzo Taurus 1 V. Le Colleoni 1
20041 Agrate Brianza
Milan, Italy
6285 Northam Drive, Suite 108
Mississauga, Ontario L4V 1X5, Canada
Tel: 905-673-0699 Fax: 905-673-6509
India
Tel: 39-039-65791-1 Fax: 39-039-6899883
United Kingdom
Arizona Microchip Technology Ltd.
505 Eskdale Road
Winnersh Triangle
Wokingham
Berkshire, England RG41 5TU
Tel: 44 118 921 5869 Fax: 44-118 921-5820
Microchip Technology Inc.
India Liaison Office
Divyasree Chambers
1 Floor, Wing A (A3/A4)
No. 11, O’Shaugnessey Road
Bangalore, 560 025, India
Tel: 91-80-2290061 Fax: 91-80-2290062
03/01/02
DS21457B-page 22
2002 Microchip Technology Inc.
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