AD7225LP

LC2MOS四通道8位DAC ，具有独立的基准输入 LC2MOS Quad 8-Bit DAC with Separate Reference Inputs

GENERAL DESCRIPTION

The AD7225 contains four 8-bit voltage output digital-to analog converters, with output buffer amplifiers and interface logic on a single monolithic chip. Each DAC has a separate reference input terminal. No external trims are required to achieve full specified performance for the part.

FEATURES

  Four 8-bit DACs with output amplifiers

  Separate reference input for each DAC

  Microprocessor compatible with double-buffered inputs

  Simultaneous update of all 4 outputs

  Operates with single or dual supplies

  Extended temperature range operation

  No user trims required

  Skinny 24-lead PDIP, CERDIP, SOIC, and SSOP packages

  28-lead PLCC package

PRODUCT HIGHLIGHTS

1\. DACs and Amplifiers on CMOS Chip.

   The single-chip design of four 8-bit DACs and amplifiers allows a dramatic reduction in board space requirements and offers increased reliability in systems using multiple converters. Its pinout is aimed at optimizing board layout with all analog inputs and outputs at one end of the package and all digital inputs at the other. 2. Single- or Dual-Supply Operation. The voltage-mode configuration of the AD7225 allows single-supply operation. The part can also be operated with dual supplies, giving enhanced performance for some parameters.

3\. Versatile Interface Logic.

   The AD7225 has a common 8-bit data bus with individual DAC latches, providing a versatile control architecture for simple interface to microprocessors. The double-buffered interface allows simultaneous update of the four outputs.

4\. Separate Reference Input for Each DAC.

   The AD7225 offers great flexibility in dealing with input signals, with a separate reference input provided for each DAC and each reference having variable input voltage capability.