AD7714ARS-3REEL

Overview

The AD7714ARS-3REEL is a signal conditioning analog-to-digital converter manufactured by Analog Devices Inc. It features a 24-bit resolution with no missing codes and utilizes sigma-delta conversion architecture. The device includes a five-channel programmable gain front end with gains ranging from 1 to 128, supporting three fully differential or five pseudo-differential inputs. It operates on a single +3 V supply (AVDD) and accepts reference voltages up to 1.25 V. The component communicates via a serial interface compatible with SPI, QSPI, Microwire, and DSP standards. It is housed in a 28-lead shrink small outline package (SSOP).

Feature Summary

• Integrates a complete analog front end with a charge balancing ADC for low-frequency measurement applications.
• Features a proprietary programmable gain front end based around an analog modulator for direct transducer interfacing.
• Includes an on-chip digital filter with programmable cutoff frequencies and notch settings for noise rejection.
• Supports self-calibration, system calibration, and background calibration modes to eliminate endpoint errors.

Applications

• Portable industrial instruments
• Portable weigh scales
• Loop-powered systems
• Pressure transducers

Procurement Notes

Verify the specific ordering suffix against official documentation to confirm package type and reel configuration. Ensure the voltage grade matches the application requirements, as the -3 suffix indicates operation at +3 V. Confirm that the SSOP-28 package dimensions align with the target PCB layout constraints before finalizing procurement.

Selection Notes

Select this model when a single +3 V supply is required for the analog section. Verify compatibility with the desired reference voltage range of approximately 1.25 V. Consider the 28-lead SSOP package availability if surface-mount assembly is preferred over through-hole options. Ensure the microcontroller interface supports the required serial communication protocols.

Part Context

This component belongs to the AD7714 family of signal conditioning ADCs designed for high-precision measurements. The AD7714 series integrates programmable gain amplifiers and digital filters to simplify system design. Variants within the family differ primarily in operating voltage, temperature range, and physical package style.

Replacement Considerations

Direct replacements include other variants within the AD7714 family such as the AD7714AR-3 or AD7714YR, provided the package and voltage specifications are compatible. Cross-referencing pinouts and electrical characteristics is essential when substituting components.