1

®

November 2000

HI7131, HI7133

LCD/LED Display-Type A/D Converters

Features

• 120dB CMRR Equal to

±0.01 Count/V of Common

Mode Voltage Error

• Fast Recovery from Input Overrange Results “Correct

First-Reading” After Overload

• Guaranteed 0000 Reading for 0V Input

• True Polarity at Zero for Precise Null Detection

• 1pA Input Current (Typ)

• True Differential Input and Reference

• Single or Dual Supply Operation Capability

• Direct LCD Display Drive - HI7131

• Direct LED Display Drive - HI7133

• Low Noise, 15

Hangover

• Low Power Dissipation, Guaranteed Less Than 1mW,

Results 8000 Hours (Typ) 9V Battery Life

• No Additional Active Components Required

Applications

• Handheld Instruments

• Basic Measurements: Voltage, Current, Resistance

Pressure, Temperature, Fluid Flow and Level, pH,

Weight, Light Intensity

• DMMs and DPMs

Description

ers that have been optimized for superior DC Common

Mode Rejection (CMRR) when used with a split

±5V supply

or a single 9V battery. The HI7131 contains all the neces-

sary active components on a single IC to directly interface an

LCD (Liquid Crystal Display). The supply current is under

100

µA and is ideally suited for battery operation. The HI7133

contains all the necessary active components on a single IC

to directly interface an LED (Light Emitting Diode).

The HI7131 and HI7133 feature high accuracy performance

like, 120dB of CMRR, auto-zero to less than 10

µV of offset,

fast recovery from over load, zero drift of less than 1

input bias current of 10pA maximum, and rollover error of

less than one count. A true differential signal and reference

inputs are useful features in all systems, but gives the

designer an advantage when measuring load cells, strain

gauges and other bridge-type transducers.

The HI7131 and HI7133 are supplied in a 40 lead plastic DIP

and a 44 lead metric plastic quad flatpack package.

Ordering Information

PART NO.

TEMP.

PACKAGE

PKG. NO.

HI7131CPL

0 to 70

40 Ld PDIP

E40.6

HI7131CM44

0 to 70

44 Ld MQFP

Q44.10x10

HI7133CPL

0 to 70

40 Ld PDIP

E40.6

HI7133CM44

0 to 70

44 Ld MQFP

Q44.10x10

File Number

3373.3

CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.

1-888-INTERSIL or 321-724-7143

Copyright © Intersil Americas Inc. 2002. All Rights Reserved

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