GENERAL DESCRIPTION

The AD7303 is a dual, 8-bit voltage out DAC that operates from a single +2.7 V to +5.5 V supply. Its on-chip precision output buffers allow the DAC outputs to swing rail to rail. This device uses a versatile 3-wire serial interface that operates at clock rates up to 30 MHz, and is compatible with QSPI, SPI, microwire and digital signal processor interface standards. The serial input register is sixteen bits wide; 8 bits act as data bits for the DACs, and the remaining eight bits make up a control register.

FEATURES

Two 8-Bit DACs in One Package

8-Pin DIP/SOIC and microSOIC Packages

+2.7 V to +5.5 V Operation

Internal & External Reference Capability

Individual DAC Power-Down Function

Three-Wire Serial Interface

QSPI™, SPI™ and Microwire™ Compatible

On-Chip Output Buffer

Rail-to-Rail Operation

On-Chip Control Register

Low Power Operation: 2.3 mA @ 3.3 V

Full Power-Down to 1 mA max, typically 80 nA

APPLICATIONS

Portable Battery Powered Instruments

Digital Gain and Offset Adjustment

Programmable Voltage and Current Sources

Programmable Attenuators