AD7715ACHIPS-5

Overview

The AD7715ACHIPS-5 is a 16-bit, low-power sigma-delta analog-to-digital converter (ADC) from Analog Devices. It operates on a single 5 V supply and features a charge-balancing ADC architecture with no missing codes. The device integrates a programmable gain amplifier (PGA) with gains of 1, 2, 32, and 128, supporting differential inputs. Key electrical specifications include ±0.0015% integral nonlinearity, a maximum supply current of 450 µA at 3 V, and a standby current of less than 10 µA. It supports master clock frequencies up to 2.5 MHz and offers a three-wire serial interface compatible with SPI, QSPI, Microwire, and DSP standards.

Feature Summary

• 16-bit resolution with guaranteed no missing codes and ±0.0015% nonlinearity
• Integrated programmable gain amplifier with selectable gains of 1, 2, 32, and 128
• Low power consumption: 450 µA typical active current and <10 µA standby current
• On-chip digital filter with programmable output update rates and notch filtering

Applications

• Smart transmitters for industrial process control
• Pressure measurement systems using strain gauges
• Temperature measurement applications requiring high accuracy
• Microcontroller-based data acquisition systems

Procurement Notes

Verify the specific package type associated with the 'ACHIPS' suffix against the manufacturer's official ordering guide, as standard variants typically utilize SOIC, PDIP, or TSSOP packages. Confirm that the 5 V supply variant meets the required AVDD voltage range of 4.75 V to 5.25 V for specified performance. Ensure compatibility with the intended microcontroller interface protocols.

Selection Notes

Select this component for single-channel, low-frequency signal conditioning where high precision is required. The internal PGA eliminates external amplification needs for signals ranging from ±20 mV to ±2.5 V. Choose the 5 V version when system power rails are fixed at 5 V. Consider the self-calibration features to eliminate zero-scale and full-scale errors across temperature variations.

Part Context

The AD7715 belongs to a family of complete analog front-end solutions designed for low-frequency measurements. It combines a sigma-delta modulator with a digital filter and PGA in a single CMOS chip. This integration reduces the bill of materials by removing external signal conditioning components, making it suitable for isolated systems where minimizing optocouplers is beneficial.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Users should consult the manufacturer's comparable parts list for parametrically similar devices.