ADA4051-1AKSZ-R7

Overview

The ADA4051-1AKSZ-R7 is a single-channel, micropower, zero-drift operational amplifier manufactured by Analog Devices Inc. It operates on a single supply voltage ranging from 1.8 V to 5.5 V and features rail-to-rail input and output capabilities. The device utilizes an innovative chopping technique to achieve extremely low offset voltage (maximum 17 µV) and minimal drift (0.1 µV/°C). Key electrical parameters include a typical supply current of 15 µA per amplifier, a gain-bandwidth product of 125 kHz, and a slew rate of 60 mV/µs at 5 V operation. It is housed in a 5-lead SC-70 package and supports the extended industrial temperature range of -40°C to +125°C.

Feature Summary

• Utilizes a novel chopping technique with autocorrection feedback to suppress offset-related ripple without increasing in-band noise.
• Provides rail-to-rail input and output swing capability for maximum dynamic range in low-voltage applications.
• Delivers high precision through very low offset voltage and exceptionally low offset voltage drift over temperature.
• Operates with micropower consumption, drawing only 15 µA typical supply current per amplifier.

Applications

• Pressure and position sensors
• Temperature measurements
• Electronic scales
• Medical instrumentation
• Battery-powered equipment

Procurement Notes

Verify the specific ordering suffix AKSZ corresponds to the 5-lead SC-70 package configuration before procurement. Confirm that the manufacturer's datasheet specifications align with your design requirements regarding thermal resistance and ESD sensitivity. Ensure supply voltages are established simultaneously with input signals to prevent damage due to internal clamp diodes.

Selection Notes

Select this component when designing battery-powered systems requiring high precision without the complexity of external filtering. The zero-drift architecture eliminates the need for post-filtering chopper ripple in many DC applications. Consider the 125 kHz bandwidth and 60 mV/µs slew rate for signal conditioning tasks where speed is secondary to accuracy and power efficiency.

Part Context

This device belongs to the ADA4051 series of CMOS micropower zero-drift operational amplifiers. The series includes dual-channel variants like the ADA4051-2, which share similar electrical characteristics but differ in channel count and package options such as MSOP or LFCSP. The ADA4051-1 variant specifically provides a single amplifier optimized for space-constrained designs using small footprint packages.

Replacement Considerations

Direct functional replacements within the same family include the ADA4051-1ARJZ (SOT-23 package) or ADA4051-1ARMZ (MSOP package), provided pin compatibility and package dimensions are verified against the PCB layout.

FAQ

Does the ADA4051-1 require an external post-filter?

No, the device employs an autocorrection feedback loop that nulls initial offset in the DC domain, preventing output ripple and eliminating the need for off-chip post-filters.

What is the input common-mode voltage range?

The inputs operate rail-to-rail, allowing the common-mode voltage to extend from the negative supply (V–) to the positive supply (V+).

How does the device handle overload recovery?

The amplifier exhibits fast positive and negative overload recovery times, ensuring quick return to linear operation after saturation events.