AD7715AR-3REEL

Overview

The AD7715AR-3REEL is a single-channel, 16-bit Sigma-Delta analog-to-digital converter (ADC) manufactured by Analog Devices Inc. It operates with an analog supply voltage of 3 V and a digital supply voltage ranging from 3 V to 5.25 V. The device features a programmable gain front end with selectable gains of 1, 2, 32, and 128, supporting differential inputs. It utilizes a charge-balancing ADC architecture to achieve 16 bits of no missing codes performance with integral nonlinearity of ±0.0015% FSR. The component supports SPI, QSPI, Microwire, and DSP-compatible three-wire serial interfaces. It includes on-chip calibration options to eliminate offset and gain errors, ensuring high accuracy in low-frequency measurement applications.

Feature Summary

• Integrates a programmable gain front end for direct transducer signal conditioning
• Features on-chip self-calibration and system calibration capabilities
• Supports multiple serial communication protocols including SPI and Microwire
• Provides low power consumption with dedicated standby mode operation

Applications

• Smart sensor systems requiring microcontroller or DSP interfacing
• Strain gauge and load cell measurement circuits
• Industrial process control and monitoring systems

Procurement Notes

Verify the specific suffix 'REEL' indicates tape-and-reel packaging when sourcing components. Confirm that the '-3' designation strictly corresponds to the 3 V analog supply specification. Ensure compatibility with the required operating temperature range of -40°C to +85°C for the A version before finalizing procurement orders.

Selection Notes

Select this component for applications requiring high precision at low data rates. Verify that the external reference voltage matches the 1.25 V nominal requirement for the 3 V variant. Ensure the host microcontroller supports the selected serial interface timing requirements. Consider the available package options if board space constraints exist.

Part Context

This part belongs to the AD7715 family of low-frequency, low-noise sigma-delta ADCs. It is designed as a complete analog front end, integrating the modulator, digital filter, and programmable gain amplifier. The series is widely used in industrial instrumentation where accurate DC measurements are critical.

Replacement Considerations

Public confirmed substitute part numbers: AD7715ARZ-3REEL.