AD7715ARUZ-5

Overview

The AD7715ARUZ-5 is a 16-bit, single-channel sigma-delta analog-to-digital converter (ADC) from Analog Devices. It operates with an analog supply voltage of 5 V and a digital supply voltage ranging from 3 V to 5.25 V. The device features a differential input type and utilizes a charge-balancing architecture. It supports serial interfaces including SPI, Microwire, and 3-Wire configurations. The maximum sampling rate is 500 samples per second. Key performance metrics include a gain error of ±0.0015% FSR and integral nonlinearity of ±0.0015% FSR. Power dissipation is specified at 9.5 mW. The component is housed in a TSSOP-16 package and functions within a temperature range of -40°C to +85°C.

Feature Summary

• Integrates a programmable gain front end capable of accepting low-level signals directly from transducers without external conditioning.
• Includes on-chip self-calibration and system calibration options to eliminate zero-scale and full-scale errors.
• Features a digital filter with a programmable first notch for adjusting cutoff frequency and output update rates.

Applications

• Pressure measurement systems
• Temperature measurement applications
• Smart transmitters

Procurement Notes

Verify the specific ordering suffix against the manufacturer's current documentation to confirm pinout compatibility and electrical specifications. Ensure that the required operating voltage aligns with the 5 V analog supply designation. Confirm package dimensions match the TSSOP-16 outline before finalizing procurement orders.

Selection Notes

Select this component for applications requiring high precision in low-frequency signal acquisition. Evaluate the need for the 5 V analog supply variant versus the 3 V option based on system power constraints. Consider the integrated programmable gain amplifier if minimizing external signal conditioning components is a priority.

Part Context

This part belongs to the AD7715 family of complete analog front ends designed for low-frequency measurement applications. The series employs sigma-delta conversion techniques to achieve high resolution. Variants within the family differ primarily by supply voltage requirements and physical packaging styles such as SOIC or PDIP.

Replacement Considerations

Consult official cross-reference lists for verified substitutes. Verify that any replacement maintains identical interface protocols and calibration capabilities.

FAQ

What types of serial interfaces does the AD7715 support?

The device supports three-wire serial, SPI, QSPI, Microwire, and DSP-compatible interfaces.

How is the digital filter configured?

The first notch of the digital filter can be programmed via the on-chip control register to adjust the filter cutoff and output update rate.

What is the purpose of the programmable gain front end?

It allows the ADC to accept input signals directly from sensors like strain gauges, reducing the need for external signal conditioning circuitry.