AD7713AR

Analog To Digital Converters (ADC) Overview

The AD7713AR is a complete analog front end for low frequency measurement applications, featuring a charge balancing ADC with 24-bit resolution and no missing codes. It includes a 3-channel programmable gain front end with gains from 1 to 128, comprising two differential inputs (AIN1, AIN2) and one single-ended high voltage input (AIN3). The device operates on a single 5 V supply with typical power dissipation of 3.5 mW in normal mode and 150 µW in standby. It supports bidirectional microcontroller serial interfaces and offers internal or external reference options.

Analog To Digital Converters (ADC) Feature Summary

• Integrates a charge balancing ADC with a programmable gain front end for direct transducer signal conditioning
• Includes on-chip current sources for RTD excitation and burn-out detection capabilities
• Features self-calibration and system calibration modes to eliminate zero-scale and full-scale errors
• Supports bidirectional serial communication with software-configurable filter cutoffs and gain settings

Analog To Digital Converters (ADC) Applications

• Loop-powered smart transmitters
• RTD transducers
• Process control systems
• Portable industrial instruments

Analog To Digital Converters (ADC) Procurement Notes

Verify the specific suffix against the ordering guide to confirm package type and temperature range. The AD7713AR designation corresponds to the SOIC-24 package with an operating temperature range of -40°C to +85°C. Ensure compatibility with existing board layouts for the 24-lead small outline package before procurement.

Analog To Digital Converters (ADC) Selection Notes

Select this component for applications requiring high accuracy signal conditioning with minimal external components. The integrated PGA and digital filter simplify design for low-frequency measurements. Consider the AIN3 input for higher voltage signals up to four times the reference voltage. Verify that the required sampling rate and noise performance align with the selected filter notch frequencies.

Analog To Digital Converters (ADC) Part Context

The AD7713 belongs to Analog Devices' family of loop-powered signal conditioning ADCs. It is designed to replace discrete signal conditioning circuits by integrating amplification, filtering, and conversion. The part is suitable for replacing older generation ADCs in industrial instrumentation where space and power consumption are critical constraints.

Analog To Digital Converters (ADC) Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.