DESCRIPTION

The DAC7800, DAC7801 and DAC7802 are members of a

new family of monolithic dual 12-bit CMOS multiplying Digi-

tal-to-Analog Converters (DACs). The digital interface speed

and the AC multiplying performance are achieved by using

an advanced CMOS process optimized for data conversion

circuits. High stability on-chip resistors provide true 12-bit

integral and differential linearity over the wide industrial

temperature range of –40

°C to +85°C.

The DAC7800 features a serial interface capable of clocking-

in data at a rate of at least 10MHz. Serial data is clocked

(edge triggered) MSB first into a 24-bit shift register and then

latched into each DAC separately or simultaneously as

required by the application. An asynchronous CLEAR control

is provided for power-on reset or system calibration func-

tions. It is packaged in a 16-pin 0.3" wide plastic DIP.

The DAC7801 has a 2-byte (8 + 4) double-buffered interface.

Data is first loaded (level transferred) into the input registers

in two steps for each DAC. Then both DACs are updated

simultaneously. The DAC7801 features an asynchronous

CLEAR control. The DAC7801 is packaged in a 24-pin 0.3"

wide plastic DIP. The DAC7802 has a single-buffered 12-bit

data word interface. Parallel data is loaded (edge triggered)

into the single DAC register for each DAC. The DAC7802 is

packaged in a 24-pin 0.3" wide plastic DIP.

FEATURES

q TWO DACs IN A 0.3" WIDE PACKAGE

q SINGLE +5V SUPPLY

q HIGH-SPEED DIGITAL INTERFACE:

Serial—DAC7800

8 + 4-Bit Parallel—DAC7801

12-Bit Parallel—DAC7802

q MONOTONIC OVER TEMPERATURE

q LOW CROSSTALK: –94dB min

APPLICATIONS

q PROCESS CONTROL OUTPUTS

q ATE PIN ELECTRONICS LEVEL SETTING

q PROGRAMMABLE FILTERS

q PROGRAMMABLE GAIN CIRCUITS

q AUTO-CALIBRATION CIRCUITS

Dual Monolithic CMOS 12-Bit Multiplying

DIGITAL-TO-ANALOG CONVERTERS

Serial Interface

8-Bit Interface

8 Bits + 4 Bits

Serial

DAC7801

DAC7800

12-Bit MDAC

DAC A

FB B

I

OUT B

12-Bit MDAC

DAC B

R

12-Bit Interface

DAC7802

12

8

12

12

AGND B

REF B

V

FB A

I

OUT A

R

AGND A

REF A

V

DAC7800

DAC7801

DAC7802

SBAS005B – JANUARY 1990 – REVISED FEBRUARY 2004

www.ti.com

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.

Copyright © 1990-2004, Texas Instruments Incorporated

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.

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