AD7762BSVZ-REEL

Overview

The AD7762BSVZ-REEL is a high-performance, 24-bit Sigma-Delta analog-to-digital converter (ADC) designed for industrial applications. It operates over an extended temperature range from -40°C to +85°C and features a fully differential modulator input with an integrated on-chip differential amplifier for signal buffering and level shifting. The device supports a maximum fully filtered output word rate of 625 kHz. Key dynamic performance metrics include a typical dynamic range of 120 dB at a 78 kHz output data rate and 109 dB at 625 kHz. Signal-to-noise ratio specifications are 112 dB at 78 kHz and 106 dB at 625 kHz. The architecture incorporates a low-pass finite impulse response (FIR) filter with user-programmable coefficients, digital offset and gain correction registers, and a programmable oversampling rate ranging from 32x to 256x.

Feature Summary

• Integrated on-chip differential amplifier provides signal buffering and level shifting, reducing external component requirements.
• Programmable low-pass FIR filter allows adjustment of default characteristics or loading of user-defined coefficients.
• Internal digital offset and gain correction registers enable precise calibration without external hardware adjustments.
• Synchronization capability via the SYNC pin facilitates coherent operation across multiple devices in a system.

Applications

• Data acquisition systems
• Vibration analysis
• Instrumentation

Procurement Notes

Verify that the ordering suffix REEL indicates tape-and-reel packaging rather than tube packaging when reviewing distributor listings. Confirm the specific revision status matches the required documentation version. Ensure the exposed paddle connection is properly addressed during assembly planning to maintain thermal and electrical grounding integrity as specified in the datasheet outline dimensions.

Selection Notes

Select this component when high-speed data acquisition requires wide input bandwidth combined with high resolution. The integrated buffer simplifies front-end design by handling single-ended to differential conversion. Consider the power supply requirements carefully, as the device utilizes separate supplies for the modulator, general analog circuitry, and digital logic. Evaluate the decimation rate settings against the necessary group delay and output data rate constraints for the target application.

Part Context

The AD7762 belongs to Analog Devices' family of high-resolution Sigma-Delta converters. It serves as a parallel interface counterpart to the serial-interface AD7763, offering similar performance metrics but with a different communication protocol. This positioning makes it suitable for systems where parallel throughput is preferred over serial simplicity. The device shares architectural similarities with other members like the AD7760, differing primarily in speed and interface type.

Replacement Considerations

The AD7763 offers equivalent dynamic performance but utilizes a serial interface instead of parallel. Designers requiring a serial alternative should verify compatibility with existing bus architectures. No direct parallel interface replacements with identical specifications are listed in the provided documentation.