AD7715ARU-5REEL

Overview

The AD7715ARU-5REEL is a single-channel, 16-bit sigma-delta analog-to-digital converter (ADC) manufactured by Analog Devices Inc. It operates with a nominal 5 V analog supply and a 3 V to 5.25 V digital supply. The device features a programmable gain front end supporting gains of 1, 2, 32, and 128, and accepts differential inputs. Static performance includes integral nonlinearity of ±0.0015% FSR and guaranteed 16-bit no missing codes. It utilizes a three-wire serial interface compatible with SPI, QSPI, Microwire, and DSP standards. Power consumption is typically 450 µA at 3 V supplies.

Feature Summary

• Integrates a charge-balancing ADC with a proprietary programmable gain front end for direct transducer interfacing.
• Includes an on-chip digital filter with programmable output update rates and notch frequencies.
• Supports self-calibration and system calibration modes to eliminate zero-scale and full-scale errors.
• Features a low-power CMOS design with a software-selectable power-down mode.

Applications

• Strain gauge and load cell measurement systems
• Industrial process control and smart transmitters
• Portable battery-powered instrumentation

Procurement Notes

Verify the specific suffix against official documentation to confirm voltage rating and package type. Confirm that the reel packaging matches the required quantity for production runs. Ensure compatibility with existing board layouts regarding the TSSOP-16 footprint and pinout configuration before finalizing orders.

Selection Notes

Select this component for applications requiring high precision with minimal external signal conditioning. Verify that the master clock frequency aligns with the desired data rate and filter characteristics. Ensure the reference voltage requirements match the available system references for optimal accuracy.

Part Context

This part belongs to the AD7715 family of low-frequency signal conditioning ADCs. It is designed to replace discrete amplifier and ADC solutions in weight scale and industrial sensor applications. The device integrates the modulator, digital filter, and serial interface into a single chip.

Replacement Considerations

Direct replacements include other parts within the AD7715 series such as the AD7715ARZ-5 or AD7715ARUZ-5. Verify pin compatibility and electrical specifications when substituting different package variants like SOIC or PDIP.

FAQ

What are the supported gain settings?

The AD7715 supports programmable gain settings of 1, 2, 32, and 128 via its internal control registers.

How is the digital filter configured?

The digital filter's first notch frequency and output update rate can be programmed using the on-chip control register to reject specific interference frequencies.

What is the maximum operating temperature?

The A version of the AD7715 has an operating temperature range from -40°C to +85°C.