AD7715AN-5

Overview

The AD7715AN-5 is a complete analog front end for low frequency measurement applications, featuring a 16-bit Sigma-Delta ADC with no missing codes. It operates from a single 5 V supply and includes a programmable gain front end with gains of 1, 2, 32, and 128. The device supports differential inputs and offers integral nonlinearity of ±0.0015% FSR. It features a three-wire serial interface compatible with SPI, QSPI, Microwire, and DSP systems. Power consumption is typically 450 µA at 3 V supplies.

Feature Summary

• Integrates a charge-balancing ADC with a proprietary programmable gain front end based on an analog modulator.
• Includes an on-chip digital filter with a programmable first notch to adjust cutoff frequency and output update rate.
• Supports self-calibration and system calibration options to eliminate gain and offset errors.
• Features a serial interface configurable for three-wire operation to reduce interconnect lines.

Applications

• Pressure measurement systems
• Temperature measurement applications
• Smart transmitters

Procurement Notes

Verify the specific suffix ANZ against official Analog Devices documentation to confirm lead-free status and RoHS compliance. Confirm package type availability as PDIP-16. Check current distribution channels for stock levels and delivery schedules directly with authorized suppliers.

Selection Notes

Select the AD7715AN-5 when a 5 V analog supply is required. Ensure the master clock frequency matches the desired output data rate and filter notch settings. Verify that the differential input range aligns with the sensor signal amplitude and selected gain setting.

Part Context

The AD7715 belongs to the AD7715 family of low-frequency measurement ADCs. The -5 suffix indicates operation with a 5 V analog supply voltage. Other variants include the AD7715-3 for 3 V operation. The component is designed for high-precision applications requiring low power consumption and direct sensor interfacing.

Replacement Considerations

Direct pin-compatible replacements within the same family include the AD7715-3 for 3 V systems. For different supply voltages or packages, verify electrical compatibility and register mapping before substitution.

FAQ

What are the available gain settings for the AD7715?

The AD7715 supports programmable gain settings of 1, 2, 32, and 128.

How does the AD7715 handle calibration?

The device includes self-calibration and system calibration options to eliminate zero-scale and full-scale errors caused by temperature drift or internal offsets.

What is the maximum operating temperature for the AD7715AN-5?

The AD7715AN-5 has an operating temperature range of -40°C to +85°C.