AD7719BR-REEL7

Overview

The AD7719BR-REEL7 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 operates on a single 3 V or 5 V supply, 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 a digital I/O port.

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 excitation current sources simplify sensor interfacing and improve measurement accuracy.
• On-chip temperature sensor and digital I/O port provide additional system monitoring and control.

Applications

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

Procurement Notes

Verify the specific suffix REEL7 indicates tape and reel packaging when sourcing. Confirm the B grade designation corresponds to the specified performance parameters in the datasheet. Ensure compatibility with the required operating temperature range of -40°C to +85°C for the intended application environment.

Selection Notes

Select this component for applications requiring high-resolution, low-frequency signal acquisition with minimal external signal conditioning. The integrated PGA and reference inputs reduce bill-of-materials complexity. Consider the available package options, such as SOIC or TSSOP, based on board space constraints and thermal requirements.

Part Context

The AD7719 belongs to Analog Devices' family of low-power, high-resolution Sigma-Delta ADCs designed for precision measurement applications. It builds upon previous generations by offering dual converters and enhanced on-chip functionality, targeting industrial process control and portable instrumentation markets where power efficiency and accuracy are critical.

Replacement Considerations

Public confirmed substitute part numbers are not provided in the verified source material.