AD7225CQ

Overview

The AD7225CQ is a CMOS quad 8-bit digital-to-analog converter (DAC) featuring integrated voltage-output amplifier latches. It contains four independent DAC channels with separate reference inputs, eliminating the need for external trimming to achieve specified performance. The device utilizes double-buffered inputs for microprocessor compatibility and supports simultaneous updating of all outputs. It operates from single or dual power supplies and is housed in a 24-lead CERDIP package. Key electrical parameters include an 8-bit resolution, parallel word input format, and operation within a temperature range extending up to 85 °C.

Feature Summary

• Quad 8-bit DAC architecture with integrated output buffer amplifiers
• Separate reference input terminal for each DAC channel
• Double-buffered inputs enabling simultaneous update of all four outputs
• Microprocessor-compatible parallel interface logic

Applications

• Battery-powered equipment requiring low power consumption
• Graphic cards and peripheral cards
• Digital still cameras
• CDMA/GSM cellular handsets
• Laptop and notebook computers

Procurement Notes

Verify the manufacturer designation, as Maxim Integrated was acquired by Analog Devices. Confirm the package type matches the required 24-lead CERDIP specification. Check RoHS compliance status, as older production runs may differ from current manufacturing standards. Ensure the operating temperature range meets the specific application requirements of up to 85 °C.

Selection Notes

Select this component when multiple independent 8-bit voltage outputs are needed on a single chip. The separate reference inputs allow for individual calibration of each channel. Verify that the supply voltage range supports both single and dual supply configurations. Consider the package size constraints, as the 24-lead DIP form factor requires specific PCB footprint planning.

Part Context

The AD7225 series belongs to the LC2MOS family of analog converters. It serves as a multi-channel solution for applications previously requiring discrete DACs. The CQ suffix typically denotes the commercial temperature grade and ceramic DIP packaging variant within the broader AD7225 product line.

Replacement Considerations

The AD7225CRSZ-RL is a compatible alternative offering identical functional specifications. Both devices provide quad 8-bit conversion with separate references. Verify package compatibility, as the CRSZ variant uses SOIC/SSOP packages instead of the CERDIP format found in the CQ model.