ADA4522-2ARMZ

Overview

The ADA4522-2ARMZ is a dual-channel, zero-drift operational amplifier featuring ultralow noise and rail-to-rail output. It operates on supply voltages from 4.5 V to 55 V (±2.25 V to ±27.5 V) with an input voltage range including ground. Key electrical parameters include a maximum offset voltage of 5 µV, drift of 22 nV/°C, typical voltage noise density of 5.8 nV/√Hz, and unity-gain crossover of 3 MHz. The device draws 830 µA per amplifier and offers high CMRR and PSRR.

Feature Summary

• Integrated EMI filters provide high immunity to electromagnetic interference without external components.
• Zero-drift architecture ensures optimized total accuracy over time, temperature, and voltage conditions.
• Ground sensing inputs allow single-supply operation with input voltage ranges extending to the negative rail.

Applications

• Inductance, capacitance, and resistance (LCR) meter front-end amplifiers
• Load cell and bridge transducer signal conditioning
• High precision shunt current sensing
• Thermocouple and resistance temperature detector (RTD) sensors

Procurement Notes

Verify the specific package suffix RM corresponds to the 8-lead MSOP form factor required for your PCB layout. Confirm that the operating environment remains within the specified -40°C to +125°C temperature range to maintain guaranteed electrical characteristics. Ensure power sequencing applies positive supply before negative supply if simultaneous application is not possible.

Selection Notes

Select this component when system requirements demand low DC error stability combined with wide dynamic range. The dual-channel configuration is suitable for differential signal processing or instrumentation applications requiring matched performance between channels. Consider the integrated EMI filtering for noisy industrial environments where external suppression components are undesirable.

Part Context

This device belongs to the ADA4522 series of precision amplifiers, which includes single-channel (ADA4522-1) and quad-channel (ADA4522-4) variants. All members share identical core specifications regarding offset voltage, noise, and bandwidth, differing only in channel count and pinout configurations to accommodate various packaging options like SOIC and TSSOP.

Replacement Considerations

ADA4522-2ARZ

FAQ

Does the ADA4522-2 require external calibration?

No, the zero-drift technology eliminates the need for external calibration circuits to maintain accuracy over temperature and time.

What is the input voltage range capability?

The input voltage range includes ground (V-) and extends up to approximately 3.5 V below the positive rail (V+), allowing for single-supply ground sensing.