AD7719BR-REEL

Overview

The AD7719BR-REEL is a low voltage, low power, factory-calibrated dual Sigma-Delta analog-to-digital converter (ADC) from Analog Devices. It integrates two independent ADCs: a 24-bit main channel with a programmable gain amplifier (PGA) and a 16-bit auxiliary channel. The device supports single 3 V or 5 V operation, consuming 4.5 mW with both ADCs enabled at 3 V. It features a 32 kHz crystal oscillator with an on-chip PLL, software-programmable output data rates up to 105 Hz, and simultaneous sampling capabilities. Key specifications include 24-bit no missing codes for the main ADC, integral nonlinearity of ±10 ppm, and offset error of ±3 µV.

Feature Summary

• Factory-calibrated architecture eliminates the need for field calibration.
• Dual-channel design allows simultaneous sampling and conversion of two signal sources without multiplexing delay.
• Integrated signal conditioning includes rail-rail input buffers, programmable gain amplifiers, and switchable excitation current sources.
• On-chip functions provide system-level integration with digital I/O ports, temperature sensors, and low-side power switches.

Applications

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

Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to confirm package type and temperature range. Confirm that the component meets RoHS compliance requirements for the intended market. Ensure that the supply chain source provides valid traceability documents. Check for any obsolescence notices or lifecycle status updates directly from Analog Devices before finalizing procurement plans.

Selection Notes

Select this component for low-frequency measurement applications requiring high resolution and precision. The dual ADC structure is suitable for applications needing simultaneous acquisition of different signal types. Consider the available PGA settings and reference inputs when designing the analog front end. Verify that the operating temperature range and power supply constraints align with the system requirements.

Part Context

The AD7719 belongs to Analog Devices' family of low-power, high-resolution Sigma-Delta ADCs designed for industrial sensor interfaces. It builds upon previous generations by offering dual converters in a single package, enhancing throughput and reducing board space. The device is part of the broader AD771x series, which includes variants with different channel counts and resolutions.

Replacement Considerations

Public confirmed substitute part numbers are not provided in the verified source material. Consult Analog Devices for alternative components within the same product family or updated generations if availability is a concern.