AD7719BRUZ-REEL7

Overview

The AD7719BRUZ-REEL7 is a low voltage, low power, factory-calibrated dual Sigma-Delta analog-to-digital converter (ADC) from Analog Devices Inc. It integrates two independent ADCs: a 24-bit main channel and a 16-bit auxiliary channel. The device operates on a single 3 V or 5 V supply with typical normal mode current consumption of 1.5 mA at 3 V. It features a programmable gain front end, simultaneous sampling capability, and separate reference inputs for each channel. The part supports output data rates up to 105 Hz and includes built-in excitation current sources, digital I/O ports, and a temperature sensor.

Feature Summary

• Factory-calibrated architecture eliminates the need for field calibration.
• Simultaneous sampling and conversion of two signal sources without multiplexing delay.
• Integrated rail-rail input buffer and programmable gain amplifier for direct transducer interfacing.
• On-chip dual switchable excitation current sources simplify sensor biasing.

Applications

• Sensor measurement systems
• Temperature measurement applications
• Pressure measurement instrumentation
• Weigh scales
• Portable instrumentation

Procurement Notes

Verify component authenticity through authorized distribution channels. Confirm package integrity and pin alignment upon receipt. Check datasheet specifications against application requirements before integration. Ensure proper handling procedures are followed due to electrostatic sensitivity.

Selection Notes

Select this component for low-frequency, high-resolution measurement tasks requiring dual-channel synchronization. Consider the 24-bit main channel for precision signals and the 16-bit auxiliary channel for secondary monitoring. Evaluate power supply constraints as the device supports both 3 V and 5 V operation. Verify interface compatibility with host microcontrollers using the serial communication protocol.

Part Context

The AD7719 belongs to Analog Devices' family of low-power, high-resolution Sigma-Delta ADCs designed for industrial and portable applications. It succeeds earlier generations by offering integrated signal conditioning and calibration. The BRUZ suffix indicates a TSSOP-28 surface-mount package variant optimized for space-constrained designs.

Replacement Considerations

Direct replacements within the same series include the AD7718 and AD7714. Verify pinout compatibility and register mapping when substituting. Check resolution and channel count requirements to ensure functional equivalence in the target design.