The AD7244 is a fast, complete, dual 14-bit voltage output D/A converter. It consists of a 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.
- 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
130mW typcal low power
