AD7766BRUZ-2

Overview

The AD7766BRUZ-2 is a high-performance, single-channel, 24-bit oversampled successive approximation (SAR) analog-to-digital converter manufactured by Analog Devices. Operating at an output data rate of 32 kSPS with a main clock frequency of 1.024 MHz, it delivers a dynamic range of 115.5 dB and a signal-to-noise ratio of 113.5 dB. The device consumes 8.5 mW of power while maintaining exceptional DC accuracy, characterized by an integral nonlinearity of ±6 ppm typical and ±15 ppm maximum. It features a fully differential input structure, an on-chip low-pass FIR filter with linear phase response, and operates from a 2.5 V supply with logic interface options ranging from 1.8 V to 3.6 V.

Feature Summary

• Oversampled SAR architecture providing high AC and DC accuracy with exceptionally low power consumption.
• Integrated digital FIR filter offering linear phase response and significant stop-band attenuation to eliminate out-of-band noise.
• Differential analog input structure designed for high common-mode rejection and robust ESD protection.
• Flexible serial interfacing capabilities supporting daisy-chain configurations and multi-device synchronization.

Applications

• Low power PCI/USB data acquisition systems
• Vibration analysis instrumentation
• High precision medical acquisition

Procurement Notes

Verify the specific suffix BRUZ corresponds to the industrial temperature range and TSSOP package configuration required for your design. Confirm that the ordering documentation explicitly lists the AD7766-2 variant specifications, particularly the 32 kSPS decimation rate and associated power dissipation limits, to ensure compatibility with system timing constraints.

Selection Notes

Select this component when ultralow power consumption is critical alongside high resolution. The AD7766-2 variant is optimal for applications requiring 32 kSPS throughput where maximizing dynamic range to 115.5 dB is necessary. Ensure the external reference voltage supports the 2.5 V analog supply requirements and that the host microcontroller supports the required serial clock frequencies for data retrieval.

Part Context

This device belongs to the AD7766 family of 24-bit ADCs, which includes variants optimized for different speed-power trade-offs. While the standard AD7766 operates at 128 kSPS and the AD7766-1 at 64 kSPS, the AD7766-2 specifically targets the lowest power segment by reducing the output data rate to 32 kSPS. This allows designers to choose the precise balance between bandwidth and energy efficiency for battery-operated or thermally constrained environments.

Replacement Considerations

The AD7766-1 serves as a higher-speed alternative within the same package if 64 kSPS is acceptable. For parallel interface requirements, consider the AD7762 or AD7763 series. If sigma-delta architecture is preferred over SAR, the AD7768-1 offers comparable performance metrics with different filtering characteristics.