ADA4254ACPZ-RL

Overview

The ADA4254ACPZ-RL is a zero drift, high voltage, low power programmable gain instrumentation amplifier (PGIA) designed for process control and industrial applications. It features 12 binary weighted gains from 1/16 V/V to 128 V/V and three scaling options of 1 V/V, 1.25 V/V, and 1.375 V/V. The device offers excellent DC precision with a maximum input offset voltage of ±14 μV and drift of ±0.08 μV/°C. It includes an integrated ±60 V protected input multiplexer, excitation current sources, and seven GPIO ports. Power consumption is 22 mW at ±12 V supplies. It operates over a temperature range of −40°C to +105°C and is available in 28-lead LFCSP and 24-lead TSSOP packages.

Feature Summary

• Zero drift amplifier topology that self-calibrates DC errors and low frequency noise for excellent DC precision.
• Integrated input multiplexer providing ±60 V protection and switching capability between two input sources.
• Built-in excitation current sources suitable for biasing sensors such as resistance temperature detectors.
• Seven general-purpose input/output pins configurable for various special functions including external multiplexer control.

Applications

• Universal process control front ends
• Data acquisition systems
• Test and measurement systems

Procurement Notes

Verify the specific package variant required, as the ADA4254 is offered in both 28-lead LFCSP and 24-lead TSSOP configurations. Confirm supply voltage requirements align with the specified ranges: VDDH-VSSH up to 56 V, AVDD-AVSS between 2.7 V and 5 V, and DVDD-DVSS between 2.7 V and 5 V. Ensure compatibility with SPI interface timing specifications for system integration.

Selection Notes

Select this component when high DC precision and robustness against harsh industrial environments are required. The zero drift architecture minimizes calibration needs across the full operating temperature range. Consider the integrated multiplexer and excitation currents if sensor interfacing is needed, reducing external component count. Verify that the available gain settings cover the required signal conditioning range for the application.

Part Context

The ADA4254 is part of Analog Devices' portfolio of precision analog signal chain components. It complements companion products such as ADCs (AD4007, AD7768), ADC drivers (ADA4945-1), and voltage references (ADR4550). The device is optimized for synchronization with ADCs and supports safety integrity level certification through internal fault detection and CRC error checking on the SPI interface.

Replacement Considerations

No public confirmed substitute part numbers are documented in the provided datasheet.

FAQ

How does the ADA4254 handle DC precision?

The device utilizes a zero drift amplifier topology that self-calibrates DC errors and low frequency 1/f noise, achieving excellent DC precision over the entire specified temperature range without requiring frequent external calibration.

What protection features are included for the inputs?

The ADA4254 features an integrated input multiplexer that provides ±60 V protection to the high impedance inputs. It also includes internal fault detection capabilities and EMI filtering to block harsh RF noise.