AD7764BRUZ

Overview

The AD7764BRUZ is a high-performance, 24-bit sigma-delta analog-to-digital converter (ADC) manufactured by Analog Devices Inc. It features a fully differential modulator input and an on-chip differential amplifier for signal buffering. The device supports pin-selectable oversampling rates of 64×, 128×, and 256×, achieving a maximum output data rate of 312.5 kSPS. It provides 109 dB dynamic range at the maximum rate and 115 dB at 78.125 kSPS. The ADC utilizes a full-band, low-pass finite impulse response (FIR) filter and operates with a 2.5 V digital supply and a 5 V analog supply over an industrial temperature range of −40°C to +85°C.

Feature Summary

• Integrates a fully differential amplifier and reference buffer to minimize external component requirements.
• Features a full-band, low-pass finite impulse response (FIR) filter for enhanced anti-aliasing protection.
• Supports flexible serial peripheral interface (SPI) communication with daisy-chaining capabilities.
• Includes an overrange alert pin and internal gain correction registers for system monitoring.

Applications

• Data acquisition systems
• Vibration analysis
• Instrumentation

Procurement Notes

Verify the specific ordering suffix BRUZ corresponds to the TSSOP-28 package and reel packaging configuration required for your assembly process. Confirm that the voltage domains match your system design, as the device requires distinct 2.5 V and 5 V supplies. Ensure compatibility with the 4.096 V external reference voltage specification before finalizing procurement.

Selection Notes

Select this component when high-speed AC signal acquisition with simultaneous DC accuracy is required. The pin-selectable decimation rates allow optimization between bandwidth and noise performance. Consider the integrated on-chip buffers if reducing external signal conditioning complexity is a priority. Verify that the 28-lead TSSOP footprint fits within the mechanical constraints of the target application.

Part Context

The AD7764 belongs to the AD776x family of high-performance sigma-delta ADCs from Analog Devices. This series includes variants such as the AD7760, AD7762, and AD7763, which offer different output data rates and interface types. The AD7764 specifically targets applications requiring a balance of wide input bandwidth and high resolution in a compact serial interface format.

Replacement Considerations

The AD7763 is a compatible alternative offering similar performance with a serial output interface. For parallel output requirements, consider the AD7760 or AD7762. Lower speed options include the AD7765, AD7766, and AD7767, which provide lower power consumption at reduced sampling rates.