AD7714ANZ-3

Analog To Digital Converters (ADC) Overview

The AD7714ANZ-3 is a complete analog front end for low-frequency measurement applications, featuring a sigma-delta conversion technique that provides up to 24 bits of no missing codes performance. It accepts low-level signals directly from transducers and outputs a serial digital word through a three-wire serial interface compatible with SPI, QSPI, MICROWIRE, and DSP systems. The device includes a five-channel programmable gain front end with gains ranging from 1 to 128, configurable as three fully differential or five pseudo-differential inputs. Operating on a single +3 V supply, it features an internal reference voltage of 1.25 V, a maximum sampling rate of 1 kS/s, and operates within a temperature range of -40°C to +85°C.

Analog To Digital Converters (ADC) Feature Summary

• Integrates a charge balancing ADC with a proprietary programmable gain front end based on an analog modulator.
• Features a low-pass digital filter with programmable cutoff frequencies and notch settings for noise rejection.
• Supports self-calibration, system calibration, and background calibration modes to eliminate endpoint errors.
• Includes Schmitt triggers on SCLK and DIN inputs for improved noise immunity in noisy environments.

Analog To Digital Converters (ADC) Applications

• Portable industrial instruments
• Portable weigh scales
• Loop-powered systems
• Pressure transducers

Analog To Digital Converters (ADC) Procurement Notes

Verify the specific suffix 'ANZ-3' against official Analog Devices documentation to confirm package type, lead-free status, and voltage rating. Ensure compatibility with existing PCB footprints and power supply rails before procurement.

Analog To Digital Converters (ADC) Selection Notes

Select this component when a 24-bit resolution and low noise floor are required for precision signal conditioning. Consider the available gain settings and input configuration options to match sensor requirements. Verify that the operating temperature range meets the application's environmental constraints.

Analog To Digital Converters (ADC) Part Context

The AD7714 belongs to a family of signal conditioning ADCs designed for high-precision measurements. Variants include different voltage ratings (3V/5V), temperature grades (A/Y), and packages (DIP/SOIC/SSOP/TSSOP). The AD7714ANZ-3 specifically denotes the 3V operation version in a PDIP package.

Analog To Digital Converters (ADC) Replacement Considerations

Direct substitutes may include other ADI sigma-delta ADCs with similar pinouts and specifications, such as the AD7715 or AD719x series. Verify functional compatibility regarding interface protocols, gain ranges, and calibration methods before substitution.

Analog To Digital Converters (ADC) FAQ

What is the maximum sampling rate of the AD7714?

The maximum sampling rate is 1 kS/s, which depends on the selected gain setting and master clock frequency.

Can the AD7714 be configured for both differential and pseudo-differential inputs?

Yes, the device can be configured as either three fully differential inputs or five pseudo-differential inputs via software control.

How does the AD7714 handle calibration?

The device supports self-calibration, system calibration, and background calibration modes, allowing users to read and write on-chip calibration registers to remove zero-scale and full-scale errors.