AD7244AQ

LC2MOS双，完整， 12位/ 14位串行数模转换器 LC2MOS Dual, Complete, 12-Bit/14-Bit Serial DACs

Product Details

The AD7242/AD7244 is a fast, complete, dual 12-bit/14-bit voltage output D/A converter. It consists of a 12-bit/14-bit DAC, 3 V buried Zener reference, DAC output amplifiers and high speed serial interface logic.

Interfacing to both DACs is serial, minimizing pin count and allowing a small package size. Standard control signals allow interfacing to most DSP processors and microcontrollers. Asynchronous control of DAC updating for both DACs is made possible with a separate LDAC input for each DAC.

The AD7242/AD7244 operates from ±5 V power supplies, providing an analog output range of ±3 V. A REF OUT/REF IN function allows the DACs to be driven from the on-chip 3 V reference or from an external reference source.

The AD7242/AD7244 is fabricated in Linear Compatible CMOS LC2MOS, an advanced mixed technology process that combines precision bipolar circuits with low power CMOS logic. Both parts are available in a 24-pin, 0.3-inch wide, plastic or hermetic dual-in-line package DIP and in a 28-pin, plastic small outline SOIC package. The AD7242 and AD7244 are available in the same pinout to allow easy upgrade from 12-bit to 14-bit performance.

### Features and Benefits

.

Two 12-Bit/14-Bit DACs with Output Amplifiers

AD7242: 12-Bit Resolution

AD7244: 14-Bit Resolution

.

Fast Settling Time

AD7242: 3 µs to ±1/2 LSB

AD7244: 4 µs to ±1/2 LSB

.

On-Chip Voltage Reference

.

High Speed Serial Interface

.

Operates from ±5 V Supplies

.

Specified Over-40°C to +85°C 

.

in Plastic Packages

.

Low Power - 130 mW typ