AD7715ARUZ-3

Overview

The AD7715ARUZ-3 is a 16-bit, single-channel Sigma-Delta analog-to-digital converter (ADC) designed for low-frequency measurement applications. It operates from a single 3 V supply and features a charge-balancing architecture with no missing codes. The device integrates a programmable gain front end supporting gains of 1, 2, 32, and 128, along with a differential analog input and a digital filter with programmable output update rates. It utilizes a three-wire serial interface compatible with SPI, QSPI, Microwire, and DSP standards. The component is housed in a 16-lead TSSOP package.

Feature Summary

• Integrates a complete analog front end with a programmable gain amplifier to directly accept low-level sensor signals.
• Employs a charge-balancing Sigma-Delta conversion technique to achieve high-resolution performance without missing codes.
• Includes on-chip self-calibration and system calibration options to eliminate offset and gain errors.
• Features a flexible three-wire serial interface that reduces interconnect lines and supports isolated system designs.

Applications

• Pressure measurement systems
• Temperature measurement applications
• Smart transmitters

Procurement Notes

Verify the specific ordering suffix against the manufacturer's current documentation to confirm voltage operation and packaging details. Ensure the procurement source provides valid traceability and authenticity guarantees for Analog Devices components. Confirm that the delivered part matches the specified 16-lead TSSOP package dimensions and pinout configuration.

Selection Notes

Select this component for single-channel, low-speed signal acquisition requiring high precision. The integrated programmable gain amplifier simplifies circuit design by reducing external signal conditioning requirements. Verify that the application environment falls within the specified operating temperature range and that the required update rate aligns with the available digital filter settings.

Part Context

This component belongs to the AD7715 family of low-frequency analog front ends manufactured by Analog Devices. The family includes variants optimized for different supply voltages, such as the AD7715-5 for 5 V operation. The AD7715 series is engineered for applications demanding accurate DC and low-frequency AC measurements with minimal external support circuitry.

Replacement Considerations

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

FAQ

What clock frequencies are supported by the AD7715?

The device supports master clock input frequencies of 1 MHz and 2.4576 MHz.

How does the AD7715 handle calibration?

The part contains on-chip registers that allow software control over self-calibration and system calibration modes to remove zero-scale and full-scale errors.

What types of input signal ranges can the AD7715 process?

It can handle unipolar ranges of 0 mV to 20 mV, 0 mV to 80 mV, 0 V to 1.25 V, and 0 V to 2.5 V, as well as bipolar ranges of ±20 mV, ±80 mV, ±1.25 V, and ±2.5 V.