AD7716BSZ

Overview

The AD7716BSZ is a 22-bit, four-channel sigma-delta analog-to-digital converter (ADC) designed for high-precision data acquisition systems. It features on-chip low-pass digital filtering with programmable cutoff frequencies ranging from 584 Hz to 36.5 Hz. The device operates on ±5 V supplies and provides a usable dynamic range of up to 111 dB at the lowest bandwidth setting. It supports serial communication via a five-line interface and includes software-controllable filter settings. The component is housed in a 44-pin Plastic Quad Flatpack (PQFP) package and is rated for operation within a temperature range of -40°C to +85°C.

Feature Summary

• Four independent sigma-delta ADC channels enable simultaneous processing of multiple input signals.
• Integrated digital low-pass filter allows software selection of cutoff frequencies to optimize noise performance.
• Five-line serial interface facilitates direct connection to microcomputers and DSPs without complex timing logic.
• Cascading capability through dedicated control pins simplifies expansion to multi-channel systems.

Applications

• Biomedical data acquisition systems such as ECG and EEG machines
• High accuracy instrumentation requiring precise signal measurement
• Process control applications involving chemical or physical sensors
• Seismic systems for monitoring ground motion data

Procurement Notes

Verify the specific ordering suffix to confirm the package type, as the BSZ designation indicates the PQFP variant. Confirm that the required supply voltages match the ±5 V specification before integration. Ensure that the system clock frequency aligns with the device's operational limits to maintain specified performance metrics.

Selection Notes

Select this component when high resolution and low-frequency precision are prioritized over high-speed sampling rates. Consider the settling time associated with the digital filter when designing multiplexed systems. Evaluate the power consumption requirements against the available supply rails to ensure compatibility with the ±5 V operating condition.

Part Context

The AD7716 series belongs to Analog Devices' LC2MOS family of data acquisition components. This series focuses on providing integrated signal conditioning and conversion for low-frequency applications. The AD7716 specifically addresses the need for high-resolution multi-channel acquisition without external filtering complexity.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Verify pinout and electrical specifications carefully if considering alternative devices from other manufacturers.