ICL7135C, TLC7135C

4 1/2DIGIT PRECISION

ANALOGTODIGITAL CONVERTERS

SLAS074D − DECEMBER 1986 − REVISED SEPTEMBER 2003

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POST OFFICE BOX 655303

at Zero

Output

UARTs or Microprocessors

Under-Range Signals

Intersil ICL7135, Maxim ICL7135, and

Siliconix Si7135

DESCRIPTION

The ICL7135C and TLC7135C converters are manufactured with Texas Instruments highly efficient CMOS

technology. These 4 1/2-digit, dual-slope-integrating, analog-to-digital converters (ADCs) are designed to

provide interfaces to both a microprocessor and a visual display. The digit-drive outputs D1 through D4 and

multiplexed binary-coded-decimal outputs B1, B2, B4, and B8 provide an interface for LED or LCD

decoder/drivers as well as microprocessors.

The ICL7135C and TLC7135C offer 50-ppm (one part in 20,000) resolution with a maximum linearity error of

one count. The zero error is less than 10

µV and zero drift is less than 0.5 µV/°C. Source-impedance errors are

minimized by low input current (less than 10 pA). Rollover error is limited to

±1 count.

The BUSY, STROBE, RUN/HOLD, OVER RANGE, and UNDER RANGE control signals support

microprocessor-based measurement systems. The control signals also can support remote data acquisition

systems with data transfer through universal asynchronous receiver transmitters (UARTs).

The ICL7135C and TLC7135C are characterized for operation from 0

°C to 70°C.

AVAILABLE OPTIONS

PACKAGE

TA

PLASTIC DIP

(N)

SMALL OUTLINE

(DW)

0

°C to 70°C

ICL7135CN

0

°C to 70°C

TLC7135CN

TLC7135CDW

Caution. These devices have limited built-in protection. The leads should be shorted together or the device placed in conductive foam

during storage or handlilng to prevent electrostatic damage to the MOS gates.

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

Copyright

 1999−2003, Texas Instruments Incorporated

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of Texas Instruments

standard warranty. Production processing does not necessarily include

testing of all parameters.

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REF

ANLG COMMON

INT OUT

AUTO ZERO

BUFF OUT

IN −

IN +

D5

B1

B2

UNDER RANGE

OVER RANGE

STROBE

RUN/HOLD

DGTL GND

POLARITY

CLK

BUSY

D1

D2

D3

D4

B8

B4

DW OR N PACKAGE

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