ADI AD7224KRZ-18

The AD7224 is a precision 8-bit voltage-output, digital-to-analog converter, with output amplifier and double buffered interface logic on a monolithic CMOS chip. No external trims are required to achieve full specified performance for the part. The double buffered interface logic consists of two 8-bit registers–an input register and a DAC register. Only the data held in the DAC registers determines the analog output of the converter. The double buffering allows simultaneous update in a system containing multiple AD7224s. Both registers may be made transparent under control of three external lines, CS, WR and LDAC. With both registers transparent, the RESET line functions like a zero override; a useful function for system calibration cycles. All logic inputs are TTL and CMOS (5 V) level compatible and the control logic is speed compatible with most 8-bit microprocessors. Specified performance is guaranteed for input reference voltages from +2 V to +12.5 V when using dual supplies. The part is also specified for single supply operation using a reference of +10 V. The output amplifier is capable of developing +10 V across a 2 kΩ load. The AD7224 is fabricated in an all ion-implanted high speed Linear Compatible CMOS (LC²MOS) process which has been specifically developed to allow high speed digital logic circuits and precision analog circuits to be integrated on the same chip.

• 8-Bit CMOS DAC with Output Amplifiers
• Operates with Single or Dual Supplies
• Low Total Unadjusted Error: Less Than 1 LSB Over Temperature
• Extended Temperature Range Operation
• μP -Compatible with Double Buffered Inputs
• Standard 18-Pin DIPs, and 20-Terminal Surface Mount Package and SOIC Package