FEATURES

l REPLACES ADC574, ADC674 AND ADC774

FOR NEW DESIGNS

l COMPLETE SAMPLING A/D WITH

REFERENCE, CLOCK AND

MICROPROCESSOR INTERFACE

l FAST ACQUISITION AND CONVERSION:

8.5ms max OVER TEMPERATURE

l ELIMINATES EXTERNAL SAMPLE/HOLD

IN MOST APPLICATIONS

l GUARANTEED AC AND DC PERFORMANCE

l SINGLE +5V SUPPLY OPERATION

l LOW POWER: 120mW max

l PACKAGE OPTIONS: 0.6 and 0.3 DIPs,

SOIC

DESCRIPTION

The ADS774 is a 12-bit successive approximation

analog-to-digital converter using an innovative

capacitor array (CDAC) implemented in low-power

CMOS technology. This is a drop-in replacement for

ADC574, ADC674, and ADC774 models in most

applications, with internal sampling, much lower power

consumption, and the ability to operate from a single

+5V supply.

The ADS774 is complete with internal clock, microprocessor

interface, three-state outputs, and internal

scaling resistors for input ranges of 0V to +10V, 0V to

+20V, ±5V, or ±10V. The maximum throughput time

is 8.5ms over the full operating temperature range,

including both acquisition and conversion.

Complete user control over the internal sampling function

facilitates elimination of external sample/hold

amplifiers in most existing designs.

The ADS774 requires +5V, with –15V optional. No

+15V supply is required. Available packages include

0.3 or 0.6 wide 28-pin plastic DIP and 28-pin SOICs.