AD4110-1BCPZ

Overview

The AD4110-1BCPZ is a single-channel, universal input analog-to-digital front end featuring a 24-bit Sigma-Delta ADC. It supports high-voltage inputs up to ±30 V with overvoltage protection and software-configurable modes for current (±20 mA), voltage (±10 V), thermocouples, and RTDs. The device includes an internal programmable gain amplifier with 16 settings, excitation current sources for resistive sensors, and field power supply capabilities. Operating from dual supplies of ±12 V to ±20 V and a +5 V logic supply, it delivers data rates from 5 SPS to 125 kSPS with simultaneous 50 Hz/60 Hz rejection. Integrated diagnostics monitor overtemperature, overvoltage, undervoltage, open wire, and overcurrent conditions.

Feature Summary

• Universal Input: Software-selectable for ±20 mA current, ±10 V voltage, thermocouples, and RTDs.
• High Voltage Protection: Inputs protected up to ±30 V; functional range extends to ±12.5 V at minimum gain.
• Integrated Diagnostics: Detects overvoltage, undervoltage, open wire, overcurrent, and overtemperature events.
• Sensor Support: Includes programmable RTD excitation currents (0.1–1 mA) and field power supply for loop-powered sensors.

Applications

• Process control and industrial automation systems
• Remote and distributed control modules
• Industrial instrumentation and measurement devices
• Sensor and data acquisition systems requiring universal input flexibility

Procurement Notes

Verify the specific suffix 'BCPZ' corresponds to the standard commercial temperature grade (-40°C to +105°C) and LFCSP package as defined in the official Analog Devices ordering guide. Confirm that the procurement source provides the Rev. 0 datasheet documentation to ensure alignment with the specified electrical characteristics and pinout definitions.

Selection Notes

Select this component when a single channel must interface with multiple sensor types including high-voltage signals. Ensure the system power architecture supports dual supplies (VDD/VSS) of ±12 V to ±20 V for the analog section and +5 V for digital I/O. Consider the 125 kSPS maximum output rate and the requirement for external reference buffering if utilizing the internal 2.5 V reference buffer.

Part Context

The AD4110-1 belongs to the AD411x family of precision analog front ends designed for industrial process control. Unlike lower-channel-count variants, this part provides a complete solution for a single high-performance channel with extensive diagnostic features. It replaces discrete solutions by integrating the ADC, PGA, and sensor conditioning circuits into a 40-lead LFCSP package.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Evaluate cross-model compatibility within the AD411x family based on channel count and input configuration requirements.

FAQ

How does the AD4110-1 handle current mode operation without system power?

In current mode, the unique input circuit architecture provides a path for the loop current even in the absence of the system module power supply, allowing operation in a no-power-supply state.

What is the maximum overvoltage protection rating for the analog inputs?

The AIN(+) and AIN(−) pins are protected against overvoltage up to ±30 V referred to AGND, provided an external RC low-pass filter with R = 10 Ω and C = 47 nF is used.

Can the AD4110-1 power loop-driven sensors directly?

Yes, the device offers a field power supply mode that can provide power to loop-powered current output sensors via the AIN(+) pin.