ADA4523-1BRZ

Overview

The ADA4523-1BRZ is a single-channel, zero-drift operational amplifier manufactured by Analog Devices Inc. It operates within a supply voltage range of 4.5 V to 36 V and features rail-to-rail output capability. Key electrical specifications include a maximum offset voltage of ±4 µV at 5 V, an offset voltage drift of 0.01 µV/°C, and a gain-bandwidth product of 5 MHz. The device exhibits low input noise with a spectral density of 4.2 nV/√Hz at 1 kHz and integrates EMI filters for enhanced immunity.

Feature Summary

• Zero-drift architecture utilizing self-calibrating circuitry to suppress offset voltage and 1/f noise over time and temperature variations.
• Integrated electromagnetic interference (EMI) filtering provides high rejection ratios across multiple frequency bands.
• Rail-to-rail output swing combined with ground-sense input capability allows operation near the negative supply rail.
• Dedicated shutdown mode significantly reduces power consumption when the amplifier is not in active use.

Applications

• High resolution data acquisition systems
• Precision reference buffering circuits
• Thermocouple signal amplification
• Strain gauge instrumentation
• Low-side current sensing

Procurement Notes

Verify the specific package variant against the ordering suffix, as the BRZ designation corresponds to the 8-lead SOIC package. Confirm RoHS compliance status and ensure the selected component matches the required thermal resistance characteristics for the intended PCB layout. Cross-reference the datasheet revision to validate performance parameters before finalizing procurement.

Selection Notes

Select this component for applications requiring ultra-low DC offset and minimal drift without external trimming. Consider the 5 MHz bandwidth and 1.8 V/µs slew rate for dynamic signal requirements. Evaluate the shutdown current consumption if power efficiency is critical during idle periods. Ensure the supply voltage remains within the specified 4.5 V to 36 V range for optimal PSRR and CMRR performance.

Part Context

The ADA4523-1 belongs to the ADA4523 family of precision, zero-drift operational amplifiers designed for high-dynamic-range instrumentation. It serves as a successor to older chopper-stabilized designs by offering improved noise performance and integrated EMI protection. The device complements other Analog Devices precision components such as the LTC6655 voltage references and LT6202 high-speed amplifiers in complex signal chains.

Replacement Considerations

The ADA4522-1 is a documented companion product within the same family, offering similar zero-drift performance but potentially differing in channel count or specific electrical limits. Verify pin compatibility and parameter alignment before substitution.

FAQ

How does the ADA4523-1 handle electromagnetic interference?

The device incorporates on-chip EMI filters that provide high rejection ratios, achieving up to 140 dB rejection at 900 MHz, ensuring stable operation in noisy environments.

What is the input common-mode voltage range?

The input common-mode range includes the negative supply rail (V− − 0.1 V) and extends up to V+ − 1.5 V, allowing for ground-sense applications.

Does the amplifier support shutdown functionality?

Yes, the ADA4523-1 features a dedicated shutdown pin (SD) that reduces the supply current to microampere levels when activated.