AD7224

NOT RECOMMENDED FOR NEW DESIGNS

LC2MOS 8-Bit DAC with Output Amplifiers

Data Sheet (Rev. B) Product Selection Table
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Overview

  • 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
  • mP-Compatible with Double Buffered Inputs
  • Standard 18-Pin DIPs, and 20-Terminal Surface
    Mount Package and SOIC Package

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 register determines the analog output of the converter. The double buffering allows simultaneous update in a system containing multiple AD7224's. 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 (5V) level compatible and the control logic is speed compatible with most 8-bit microprocessors.

Specified performance is guaranteed for input reference voltages from +2V to +12.5V when using dual supplies. The part is also specified for single supply operation using a reference of +10V. The ouput amplifier is capable of developing +10V 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.
AD7224
LC2MOS 8-Bit DAC with Output Amplifiers
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Documentation

Data Sheet 2

Application Note 1

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Software Resources

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Hardware Ecosystem

Parts Product Life Cycle Description
AD5300
PRODUCTION 2.7 V to 5.5 V, 140 µA, Rail-to-Rail Voltage Output 8-Bit DAC in SOT-23 and MicroSOIC Packages
AD5601
PRODUCTION 2.7 V to 5.5 V, <100 μA, 8-Bit nanoDAC, SPI Interface in LFCSP and SC70
AD5611
PRODUCTION 2.7 V to 5.5 V, <100 μA, 10-Bit nanoDAC, SPI Interface in LFCSP and SC70
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Tools & Simulations

Precision DAC Error Budget Tool

The Precision DAC Error Budget Tool is a web application that calculates the DC Accuracy of precision DAC signal chains. It shows how the static errors accumulate throughout your signal chain to quickly evaluate the design tradeoffs. Calculations include the DC errors introduced by Voltage References, Operation Amplifiers and Precision DACs.

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