ALD1722ESAL

Overview

The ALD1722ESAL is a monolithic rail-to-rail precision CMOS operational amplifier featuring integrated user-programmable EPAD-based offset voltage adjustment. It offers a typical input bias current of 0.01pA, an initial input offset voltage of 25µV, and a bandwidth of 1.5MHz. The device supports a supply voltage range of ±2.0V to ±5.0V with a supply current of 0.8mA. It provides a slew rate of 2.1V/µs and can drive capacitive loads up to 4000pF at unity gain.

Feature Summary

• EPAD technology enables computer-assisted in-system programming for permanent offset voltage trimming
• Rail-to-rail input and output voltage ranges accommodate full signal swing
• High capacitive loading capability allows driving loads up to 4000pF
• Extremely low input bias current minimizes source impedance distortion

Applications

• Sensor interface circuits
• Precision analog cable driver
• Biochemical probe interface
• Precision Sample and Hold amplifiers
• Current sources

Procurement Notes

Verify the specific package variant (SOIC) against the datasheet pinout diagram. Confirm that the application circuit accommodates the required VE1 and VE2 programming pulses during system calibration. Ensure static control procedures are followed due to ESD sensitivity. Check compatibility with standard EPAD programmers for offset adjustment.

Selection Notes

Select this component when high precision requires eliminating manual trimming errors. It is suitable for applications needing rail-to-rail performance with minimal power consumption. Consider its use where high source impedance electrodes require ultra-low input bias currents. Evaluate its suitability for systems requiring periodic in-system calibration to compensate for component tolerances.

Part Context

This part belongs to the ALD1722E series of low-power CMOS operational amplifiers. It serves as a direct replacement for the ALD1712, adding programmable offset voltage capabilities. The 'SAL' suffix indicates an 8-pin Small Outline Plastic Dip (SOIC) package with lead-free (RoHS) compliance. It operates within a commercial temperature range of 0°C to +70°C.

Replacement Considerations

The ALD1722E is documented as a direct replacement for the ALD1712. Verify pinout compatibility and ensure the replacement circuit supports the necessary EPAD programming voltages on pins VE1 and VE2.