07/03/01

3

ES5129

4-1/2 digit with LCD

9

F2, E2, DP2

O Output to LCD segment.

10

B3, C3, MINUS

O Output to LCD segment.

11

A3, G3, D3

O Output to LCD segment.

12

F3, E3, DP3

O Output to LCD segment.

13

B4, C4, BC5

O Output to LCD segment.

14

A4, G4, D4

O Output to LCD segment.

15

F4, E4, DP4

O Output to LCD segment.

16

BP3

O LCD backplane signal

17

BP2

O LCD backplane signal

18

BP1

O LCD backplane signal

19

VDISP

P Negative supply for display drivers.

20

DP4/OR

I/O

Input: Turns on most significant decimal point when HI.

Output: Pulled HI when result count exceeds ±19,999.

21

DP3/UR

I/O

Output: Pulled HI when result count is less than ±1,000.

22

LATCH/HOLD I/O

Input: when floating, ES5129 operates in the free-run

mode. When pulled high, the last display reading is held.

When pulled LO, the result counter contents are shown

incrementing during the de-integrate phase of cycle.

Output: Negative going edge occurs when the data latche

are upgraded. Can be used as a converter status signal.

23

V-

P Negative power supply terminal

24

V+

P Positive power supply terminal

25

CAZ

I/O Integrator amplifier input

26

CINT

I/O Integrator amplifier output

27

CONTINUITY I/O

Input: when LO, continuity flag on the display is off.

When HI, continuity flag is on.

Output: HI when voltage between inputs is less than

+200mV. LO when voltage between inputs is more than

+200mV.

28

COMMON

O Set common-mode voltage of 3.2V below V+.

29

CREF+

I/O Positive connection to external reference capacitor

30

CREF-

I/O Negative connection to external reference capacitor

31

BUFFER

O Buffer amplifier output

32

IN_LO

I Negative input voltage terminal

33

IN_HI

I Positive input voltage terminal

34

REF_HI

I Positive reference voltage terminal

35

REF_LO

I Negative reference voltage terminal

36

DGND

O Ground reference for digital section

37

RANGE

I Pulled HIGH externally for 2V scale.

38

DP2

I When HI, decimal point 2 will be on.

39

DP1

I When HI, decimal point 1 will be on.

40

OSC2

I/O

Output of first clock inverter. Input of second clock

inverter.