AD7762BSVZ

Overview

The AD7762BSVZ is a high-performance, 24-bit Sigma-Delta analog-to-digital converter (ADC) from Analog Devices. It supports a maximum fully filtered output word rate of 625 kSPS with a dynamic range of 109 dB and an SNR of 106 dB at this speed. At a lower output data rate of 78 kHz, the device achieves a dynamic range of 120 dB and an SNR of 112 dB. The component features a fully differential modulator input, an on-chip differential amplifier for signal buffering, and a low-pass finite impulse response (FIR) filter with default or user-programmable coefficients. It operates within an industrial temperature range of -40°C to +85°C and utilizes a 64-lead TQFP package.

Feature Summary

• Integrates a differential amplifier for signal buffering and level shifting to reduce external conditioning requirements.
• Includes programmable decimation rates ranging from 32x to 256x and a digital FIR filter with adjustable coefficients.
• Features internal offset and gain correction registers alongside an overrange alert bit for enhanced accuracy.
• Supports synchronization of multiple devices via a dedicated SYNC pin.

Applications

• Data acquisition systems
• Vibration analysis
• Instrumentation

Procurement Notes

Verify the specific ordering suffix against the manufacturer's current documentation to ensure compatibility with required packaging and environmental specifications. Confirm that the supply voltage requirements align with the system design, as the device requires distinct analog and digital power rails. Check for any recent revision updates in the datasheet that may affect pinout or electrical characteristics before finalizing procurement orders.

Selection Notes

Select the AD7762BSVZ when high-speed data acquisition requires a wide dynamic range without complex front-end antialiasing filters. Consider the on-chip differential amplifier if signal buffering and level shifting are needed to simplify the circuit design. Evaluate the available decimation rates and FIR filter options to match the specific bandwidth and noise performance requirements of the application.

Part Context

The AD7762 belongs to the AD776x family of high-resolution Sigma-Delta ADCs manufactured by Analog Devices. This series is designed for applications demanding high precision and speed. Related parts include the AD7760, which offers a parallel interface, and the AD7763, which provides a serial interface. These components share similar architectural benefits but differ in interface types and specific throughput capabilities.

Replacement Considerations

The AD7760 serves as a related alternative offering a parallel interface with comparable resolution. The AD7763 provides a serial interface option within the same product family. Verify interface compatibility and pin assignments when considering these substitutes, as they may require different board layouts and software drivers.