1

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December 1997

ICL7134

14-Bit Multiplying

Microprocessor-Compatible D/A Converter

Features

• 14-Bit Linearity (0.003% FSR)

• No Gain Adjustment Necessary

• Microprocessor-Compatible with Double Buffered

Inputs

• Bipolar Application Requires No Extra Adjustments or

External Resistors

• Low Linearity and Gain Temperature Coefficients

• Low Power Dissipation

• Full Four-Quadrant Multiplication

• 883B Processed Versions Available

Description

The ICL7134 combines a four-quadrant multiplying DAC

using thin film resistor and CMOS circuitry with an on-chip

PROM-controlled correction circuit to achieve true 14-bit

linearity without laser trimming.

Microprocessor bus interfacing is eased using standard

memory WRITE cycle timing and control signal use. Two

input buffer registers are separately loaded with the 8 least

significant bits (LS register) and the 6 most significant bits

(MS register). Their contents are then transferred to the

14-bit DAC register, which controls the current switches. The

DAC register can also be loaded directly from the data

inputs, in which case the MS and LS registers are

transparent.

The ICL7134 is available in two versions. The ICL7134U is

programmed for unipolar operation while the ICL7134B is

most significant bit of the DAC is separated from the

reference input to the remainder of the ladder. For unipolar

use, the two reference inputs are tied together, while for

bipolar operation, the polarity of the MSB reference is

reversed, giving the DAC a true 2’s complement input

transfer function. Two resistors which facilitate the reference

inversion are included on the chip, so only an external

op-amp is needed. The PROM is coded to correct for errors

in these resistors as well as the inversion of the MSB.

Ordering Information

PACKAGE

0 to 70

-25 to 85

-55 to 125

BIPOLAR VERSIONS

0.01% (12-bit)

ICL7134BJCJI

ICL7134BJIJI

ICL7134BJMJI

28 Ld CERDIP

0.006% (13-bit)

ICL7134BKCJI

ICL7134BKIJI

ICL7134BKMJI

28 Ld CERDIP

0.003% (14-bit)

ICL7134BLCJI

ICL7134BLIJI

ICL7134BLMJI

28 Ld CERDIP

UNIPLAR VERSIONS

0.01% (12-bit)

ICL7134UJCJI

ICL7134UJIJI

ICL7134UJMJI

28 Ld CERDIP

0.006% (13-bit)

ICL7134UKCJI

ICL7134UKIJI

ICL7134UKMJI

28 Ld CERDIP

0.003% (14-bit)

ICL7134ULCJI

ICL7134ULIJI

ICL7134ULMJI

28 Ld CERDIP

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

File Number

3113.1

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