AD7880CRZ

Overview

The AD7880CRZ is a monolithic 12-bit analog-to-digital converter (ADC) fabricated in Analog Devices' LC2MOS process. It operates from a single +5 V supply and features a throughput rate of 66 kS/s with a conversion time of 12 μs and an acquisition time of 3 μs. The device includes a power save mode reducing typical power dissipation to 2 mW, while normal operation consumes 25 mW. It offers a signal-to-noise ratio (SNR) of 70 dB and supports three user-selectable input ranges: 0 V to 5 V, 0 V to 10 V, and ±5 V. The component is housed in a 24-lead SOIC package.

Feature Summary

• Supports multiple unipolar and bipolar input ranges using a single +5 V supply via internal resistor networks.
• Integrates a low-power successive-approximation architecture with a track-and-hold amplifier for high-speed data acquisition.
• Provides fast bus access times and standard control inputs for direct interfacing with microprocessors and DSPs.

Applications

• Battery-powered portable systems
• Digital signal processing
• Speech recognition and synthesis
• High-speed modems

Procurement Notes

Verify the specific suffix 'CRZ' against the manufacturer's ordering guide to confirm the industrial temperature range (-40°C to +85°C) and SOIC package variant. Ensure compatibility with system voltage requirements and clock frequencies before finalizing procurement.

Selection Notes

Select this component when a 12-bit resolution and 66 kS/s sampling rate are required within a single-supply design. Consider the available input ranges and interface logic compatibility with the target digital processor. Evaluate thermal constraints as power dissipation varies between normal and power-save modes.

Part Context

The AD7880 series comprises 12-bit ADCs designed for applications requiring moderate speed and precision. The CRZ designation indicates the commercial/industrial grade version packaged in a small outline integrated circuit (SOIC). This model belongs to a family that includes DIP and ceramic variants with similar electrical characteristics but different physical footprints.

Replacement Considerations

Direct pin-compatible alternatives include other models within the AD7880 series such as the AD7880BRZ or AD7880CNZ, depending on the required accuracy specifications and packaging preference. Verify that substitute components meet the same throughput and power consumption requirements.