AD7225CRSZ

Overview

The AD7225CRSZ is an LC2MOS quad 8-bit digital-to-analog converter (DAC) featuring integrated output buffer amplifiers and a double-buffered parallel interface. It supports simultaneous update of all four channels via the LDAC signal. The device operates with single or dual supplies, requiring VDD between 11.4 V and 16.5 V, with VSS at -5 V for optimal performance. Each DAC has a separate reference input allowing independent voltage ranges from 2 V to (VDD - 4 V). Key static parameters include ±1 LSB relative accuracy and ±1 LSB differential nonlinearity for the C version. Dynamic performance specifies a settling time of 4 µs to ±½ LSB and a slew rate of 2.5 V/µs. The component is housed in a 24-lead SSOP package.

Feature Summary

• Quad 8-bit architecture with individual buffered voltage outputs
• Double-buffered parallel interface enabling simultaneous multi-channel updates
• Separate reference inputs per channel supporting variable voltage levels
• LC2MOS process technology for high-speed digital and precision analog integration

Applications

• Programmable transversal filters
• Digital word multiplication circuits
• Microprocessor-controlled analog signal generation

Procurement Notes

Verify the ordering suffix CRSZ corresponds to the commercial temperature range (-40°C to +85°C) and SSOP package. Confirm that the specific revision matches the required specifications, as performance parameters such as total unadjusted error may vary between K/B and L/C versions. Ensure supply voltages adhere to the specified ranges for guaranteed monotonicity and linearity.

Selection Notes

Select this component when a compact solution for four independent 8-bit DACs is required. The C version offers improved relative accuracy compared to K/B versions. Ensure the application can provide the necessary overhead voltage (VDD - VREF >= 4 V). For bipolar output requirements, external resistors and amplifiers are needed per channel. Verify that the load resistance meets the minimum 2 kΩ requirement for specified performance.

Part Context

The AD7225 belongs to Analog Devices' family of CMOS DACs fabricated on an ion-implanted LC2MOS process. This technology allows the integration of high-speed logic and precision analog circuitry on a single chip. The part number suffix indicates the package type and temperature grade; CRSZ denotes the SSOP package and commercial industrial temperature range.

Replacement Considerations

Direct pin-compatible replacements within the same package and specification class should be verified against the manufacturer's current product selector guide. Cross-model comparisons must account for differences in accuracy grades (K/B vs. L/C) and power supply configurations.