AD7763BSVZ-REEL

Overview

The AD7763BSVZ-REEL is a high-performance, 24-bit Sigma-Delta analog-to-digital converter (ADC) from Analog Devices Inc. It features a fully differential modulator input and an on-chip differential amplifier for signal buffering. The device supports a maximum output data rate of 625 kSPS with a Signal-to-Noise Ratio (SNR) of 107 dB at this speed, or 112 dB at 78 kHz. It includes a low-pass finite impulse response (FIR) filter with user-programmable coefficients and digital offset/gain correction registers. The component operates over the industrial temperature range of -40°C to +85°C and utilizes a flexible serial interface.

Feature Summary

• Integrates a fully differential modulator input with an on-chip differential amplifier for signal buffering and level shifting.
• Features a programmable oversampling rate ranging from 32x to 256x and a low-pass FIR filter with default or user-programmable coefficients.
• Includes internal gain and offset registers for digital calibration and an overrange alert bit for status monitoring.
• Supports synchronization of multiple devices via a dedicated SYNC pin and offers I2S interface mode compatibility.

Applications

• Data acquisition systems
• Vibration analysis
• Instrumentation

Procurement Notes

Verify the specific ordering suffix REEL indicates tape-and-reel packaging when sourcing components. Confirm that the supply voltage requirements match the application design, as the device requires separate analog and digital power domains. Ensure the serial interface configuration aligns with the host microcontroller's capabilities before finalizing procurement.

Selection Notes

Select this component for applications requiring high-speed, high-resolution conversion with minimal external signal conditioning. The integrated buffer and programmable FIR filter reduce the need for complex front-end designs. Consider the power dissipation characteristics and thermal management requirements due to the exposed paddle package when designing the PCB layout.

Part Context

The AD7763 belongs to a family of high-performance Sigma-Delta ADCs from Analog Devices. Related variants include the AD7760 and AD7762, which offer parallel interfaces or different sampling rates. The BS in the part number typically denotes the industrial temperature grade (-40°C to +85°C), distinguishing it from commercial grade options.

Replacement Considerations

Direct functional substitutes within the same series include the AD7762BSVZ-REEL, which shares similar performance metrics but utilizes a parallel interface instead of serial. Designers should verify interface compatibility and register mapping differences when considering alternative models from the manufacturer.

FAQ

What is the maximum output data rate supported by the AD7763?

The AD7763 supports a maximum fully filtered output word rate of 625 kSPS.

How does the device handle signal buffering?

It integrates an on-chip differential amplifier that provides signal buffering and level shifting, reducing the requirement for external signal conditioning components.

Can the digital filter characteristics be customized?

Yes, the device includes a low-pass finite impulse response (FIR) filter that allows for user-programmable coefficients to tailor its characteristics to specific application needs.