Analog Microelectronics, Inc.

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AME811/AME811A/AME811R

3-1/2 Digit A/D Converter - Low Power

With HOLD And Differential Reference Inputs

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l 100µV Resolution

l High Impedance Differential Inputs

l Differential Reference

l Drive LCD Directly

l Three New Convenient Features

(AME811A Only)

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l Digital multimeter

l pH meter

l Capacitance meter

l Thermometer

l Digital Panel meter

l Photometer

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The AME811 family are high performance, low power.

3-1/2 digit, dual-slope integrating A/D converters, with

on-chip display drivers. The AME811 is designed for a

single battery operated system, will drive non-multi-

plexed LCD display directly.

These A/D converters are inherently versatile and ac-

curate. They are immune to the high noise environ-

ments. The true differential high impedance inputs and

differential reference are very useful for making

ratiometric measurement, such as resistance, strain

gauge and bridge transducers. The built-in auto-zero

feature automatically corrects the system offset with-

out any external adjustments.

Low-battery flag, integration and de-integration status

flags are three additional features which are available

in the 44-pin package, AME811ACKW.

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pin configuration on page 4 and pin description on page 5 & 6.

AN ALOG

INPUT

IN HI

LCD DISPLAY

SEGMENT

DRIVE

IN LO

PO L

BP

V+

CO M

MINUS SIGN

BACKPLANE

DRIVE

BUF

A/Z

INT

FULL SCALE IN PUT

200.0mV

100.0mV

TO ANALO G

COM MON (P32)

V-

OSC

OSC

21

35

31

2-19

22-25

30

20

21

38

36

9V

33

26

40

39

20pF

10pF

V+

V+

32

28

29

27

34

1M

47K

24K

1K

0.01

0.1

0.47

0.22

20M

40KHz

470K