ALD1726ESAL

Overview

The ALD1726ESAL is a monolithic rail-to-rail ultra-micropower precision CMOS operational amplifier featuring integrated user-programmable EPAD offset voltage adjustment. It operates on a single supply of 2V to 10V or dual supplies of ±1V to ±5V, with a typical supply current of 25µA. Key electrical parameters include a gain bandwidth product of 400 kHz, a slew rate of 0.17V/µs, and an input bias current of 0.01pA. The device offers a programmable offset voltage range of ±20mV and achieves a total input offset voltage as low as 50µV after programming.

Feature Summary

• Integrates EPAD technology for computer-assisted, in-system programming of offset voltage without external components
• Features rail-to-rail input and output voltage ranges with tolerance to over-voltage input spikes
• Provides extremely low input bias current and high open-loop voltage gain for precision applications
• Eliminates chopper clocking noise and dynamic power dissipation associated with traditional trimming methods

Applications

• Sensor interface circuits and transducer biasing
• Biochemical probe interfaces and high source impedance electrode amplifiers
• Precision sample and hold amplifiers and current-to-voltage converters
• Portable instruments requiring periodic in-system calibration

Procurement Notes

Verify the specific suffix 'SAL' corresponds to the lead-free (RoHS compliant) 8-pin SOIC package variant. Confirm that the application circuit supports the necessary programming pulses for VE1 and VE2 pins if in-system programming is required. Ensure static control procedures are observed due to ESD sensitivity. Check for any obsolescence notices regarding new design recommendations.

Selection Notes

Select this component when system-level precision requires compensating for external component tolerances and environmental drifts. It is suitable for designs needing micropower consumption with rail-to-rail signal handling. Consider the need for an EPAD programmer and adapter module for the trimming process. Evaluate if the 400 kHz bandwidth and 0.17V/µs slew rate meet the signal processing requirements.

Part Context

This part belongs to the ALD1726E series of ultra-micropower CMOS operational amplifiers. It serves as a direct replacement for the ALD1706, adding the capability for user-programmable offset voltage trimming. The series utilizes Advanced Linear Devices' enhanced A CMOS silicon gate process to achieve low power and high precision characteristics.

Replacement Considerations

The datasheet identifies the ALD1726E as a direct replacement for the ALD1706 operational amplifier.