ES51999 [CYRUSTEK]

ES51999

4 3/4 and 5 3/4 A/D AUTO

Features

External crystal oscillator

4MHz: count up to 44,000 counts

(input range: ±440mV)

10MHz: count up to 440,000 counts

(input range: ±440mV)

Four selectable conversion rates:

20, 10, 5, 2 conversion/sec

On chip resistance switches for range

Changing.

Voltage (DC/AC), current(DC/AC), resistor,

diode, frequency and duty cycle measurement

400mV independent input

on chip OP amp’ for AC/DC conversion

Auto zeroing function

X10 function

I/O port for microprocessor

400MHz Frequency counter and 1MHz duty

cycle measurement

On chip buzzer driving: 2KHz

Single 5V DC power supply (V+ to V-)

Low battery detection

SLEEP mode

64-pin QFP

Description

The ES51999 is a 44,000/440,000-count

dual-slope analog-to-digital converter

(ADC) with X10 functions. The

ES51999 also include frequency and

duty cycle measurement. The conversion

rate

and

resolution

can

be

selected/decided

by

external

microprocessor. In additional, other

functions are also provided for low

battery detection, on chip buzzer driving,

and I/O port with microprocessor.

1

07/07/06

ES51999

4 3/4 and 5 3/4 A/D AUTO

Absolute Maximum Ratings

Characteristic

Positive Supply Voltage

(V+ to AGND)

Negative Supply Voltage

(V- to AGND)

Analog I/O Voltage

Digital I/O Voltage

Power Dissipation

Operating Temperature

Storage Temperature

Lead Temperature

(soldering, 10sec)

Rating

3.5V

-3.5V

((V-) - 0.5V) to ((V+) + 0.5V)

((V-) - 0.5V) to ((V+) + 0.5V)

800mW

0°C to 70°C

-25°C to 125°C

270°C

Electrical Characteristics

TA=25°C, DGND=AGND=0V

Symbol Parameter

Test Condition

V+

V-

I(V+)

I(GND)

Zero

NLV1

REV1

NLV10

REV10

V12

LBATT

TCRF

Positive Power Supply

Negative Power Supply

Operation

Supply Current

Supply Current of DGND

to V-

Zero Input Reading

Nonlinearity (Voltage x1)

Rollover Error

(Voltage x1)

Nonlinearity

(Voltage x10)

Rollover Error

(Voltage x10)

Band Gap Voltage

Reference

Low Battery Detection

Reference Voltage (V12)

Temperature Coefficient

Normal power on (V+ to V-)

∆V

between DGND and V- is -

0.2V

1 MΩ input resistor, null to zero

by uP.

Best case straight line

1 MΩ input resistor

Best case straight line

1 MΩ input resistor

100 kΩ between V12 and AGND

LBATT to V12

100 kΩ between V12 and AGND

(0°C to 70°C)

Min.

2.3

-2.3

-

5

-0

-0.01

-0.01

-0.1

-0.1

-1.31

-60

-

Typ. Max. Unit

2.5

-2.5

1.0

10

0

-

-

-

-

-1.23

0

50

2.7

-2.7

1.7

-

+0

0.01

0.01

0.1

0.1

-1.10

60

-

V

V

mA

mA

count

%F.S.

%F.S.

%F.S.

%F.S.

V

mV

ppm/°C

2

07/07/06

ES51999

4 3/4 and 5 3/4 A/D AUTO

Pin configuration

QFP-64pin

L

B

A

T VV

T + +

A

G

N

D

A

G

N

D

60

O

S

D

C

G

N V V4

D- - M

S

C

L

K

S

T

A

TVE

UC O

S C C

55

50

CAZ

RAZ

BUF

BUFX10

Cref-

Cref+

NC

IVSH

IVSL

TEST5

ACVL

ACVH

ADI

ADO

NC

OVX

OVH

NC

1

CINT

5

45

10

40

15

35

20

25

30

OSC2

OSC1

BUZOUT

BUZIN

NC

FREQ

NC

NC

NC

NC

NC

NC

NC

VR

VRH

NC

NC

NC

NC

Pin Description

Pin No.

Symbol

1

CAZ

2

RAZ

3

CINT

4

BUF

5

BUFX10

6

Cref-

7

Cref+

9

IVSH

10

IVSL

11

TEST5

12

ACVL

13

ACVH

14

ADI

15

ADO

Continued on next page

O

O

O

O

O

I/O

I/O

I

I

I/O

O

O

I

O

O O V V V V N S N V N VN

VR R R R R C G C R C 4 C

S 1 5 4 3 2

N 1

0

0

G

D

m

Type Description

Auto-zero capacitor connection

Auto-zero resistance connection

Integration capacitor connection

Integration resistor connection output

Integration resistor connection output

Negative connection for reference capacitor

Positive connection for reference capacito

High current measurement input

Low current measurement input

Test Pin

Negative output of AC to DC converter

Positive output of AC to DC converter.

Negative input of internal AC to DC OpAmp

Output of internal AC to DC OpAmp.

ES51999

3

07/07/06

ES51999

4 3/4 and 5 3/4 A/D AUTO

Pin No.

17

18

20

21

22

23

24

25

27

29

31

37

38

46

48

49

50

51

52

53

54

55

56

57

58

59

Symbol

OVX

OVH

OVSG

OR1

VR5

VR4

VR3

VR2

SGND

VR1

V400m

VRH

VR

FREQ

BUZIN

BUZOUT

OSC1

OSC2

EOC

VCC

STATUS

SCLK

OSC4M

V-

V-

DGND

Type Description

I

I

I

O

O

O

O

O

G

I

I

O

O

I

I

O

I

O

O

I

I/O

I

I

P

P

G

Input high voltage for resistance measurement.

Output connection for resistance measurement.

Sense low voltage for resistance measurement.

Reference resistor connection for 399.9Ω range.

Voltage measurement

÷

10000 attenuator (4000V.)

Voltage measurement

÷

1000 attenuator (400.0V.)

Voltage measurement

÷

100 attenuator (40.00V.)

Voltage measurement

÷

10 attenuator (4.000V.)

Signal Ground.

Measurement input.

400mV independent input.

Output of band-gap voltage reference. Typically -1.2V

Reference input voltage connection. Typically -200mV

Frequency counter input, offset to V-/2

Enables the buzzer. Low action.

Outputs a 2KHz audio frequency signal for driving piezoelectric buzzer

when BUZIN is low.

Crystal oscillator input connection.

Crystal oscillator output connection.

End of conversion indicator

The high level of digital I/O signals, which is connected to VCC pin of

microprocessor.

ES51966 sends current status to microprocessor or receives controlled

status from microprocessor.

Clock input from microprocessor.

Crystal oscillator selection. NC for 4MHz; connect to V- for 10MHz.

Negative supply voltage, connected to cathode of battery typically..

Negative supply voltage, connected to cathode of battery typically.

Digital Ground ( Output of on-chip DC-DC converter ),

V

DGND

= ( V+ - V- ) / 2

Analog Ground

Analog Ground

Positive supply voltage

Positive supply voltage

Low battery voltage detection

60

AGND

G

61

AGND

G

62

V+

P

63

V+

P

64

LBATT

I

Pin No. :

8 , 16 , 19 , 26 , 28 , 30 , 32-36 , No connected

39-45 , 47

P: Power,

G: Ground,

I: Input,

O: Output

4

07/07/06

ES51999

4 3/4 and 5 3/4 A/D AUTO

Operation `Mode

(1) Digital Interface between ES51999 and Microprocessor

The EOC, SCLK and STATUS of the ES51999 are used as digital communicating

interface between ES51999 and microprocessor. The STATUS pin is bi-directional, and

the others are unilateral: EOC is from ES51999 to microprocessor and SCLK is from

microprocessor to ES51999. The timing and data of the communication are as follows:

mode 1:

ES51999 receives controlled status from microprocessor.

Force A/D entering into AZ phase

t

1

t

6

t

7

SCLK(I)

t

2

START

t

3

t

4

t

5

t

5

END

t

8

E

t

9

D

F

(VCC)

(V-)

STATUS(I/O)

A

B C

status

(VCC)

(V-)

Timing of the above figure:

t

1

(1040 ~ 4096)

T

t

2

512

T

t

3

(4 ~ 256)

T

t

4

> 4

T

t

5

(16 ~ 1024)

T

(T = 0.25µs)

t

6

t

7

t

8

t

9

(32 ~ 512)

T

(520 ~ 1020)

T

(0 ~ 256)

T

520

T

Note: 1. At START:

After time A, ES51999 enter into AZ phase. And at the same time, STATUS is

changed from output pin to input pin with a 3uA pull low current provided by

ES51999 internally. Then microprocessor can send control status to STATUS. It

is suggested that micro-processor begins to drive STATUS between B and C.

2. At END:

The microprocessor stopped driving STATUS between D and E, and ES51999

will begin to drive STATUS after F.

5

07/07/06