ALD2721SBL

Overview

The ALD2721SBL is a dual monolithic rail-to-rail precision CMOS operational amplifier featuring integrated user-programmable EPAD-based offset voltage adjustment. It provides extremely low input currents of 0.01pA typical, high open-loop voltage gain, and a useful bandwidth of 700KHz with a slew rate of 0.7V/μs. The device supports supply voltages from 2.0V to 10.0V single or ±1.0V to ±5.0V dual supplies, consuming a low typical supply current of 200μA for both amplifiers.

Feature Summary

• Features Electrically Programmable Analog Device (EPAD) technology allowing computer-assisted in-system programming of individual offset voltage trimming without external components.
• Provides rail-to-rail input and output voltage ranges with tolerance to over-voltage input spikes of 300mV beyond supply rails.
• Achieves simultaneous ultra-low input bias current and precise offset voltage compensation through internal CMOS FET trimming circuits.

Applications

• Sensor interface circuits
• Biochemical probe interface
• Precision Sample and Hold amplifiers

Procurement Notes

Verify the specific suffix 'SBL' against official manufacturer documentation to confirm package type and temperature range. Ensure compatibility with standard EPAD programmers for in-system programming functionality. Confirm operating temperature specifications match application requirements before procurement.

Selection Notes

Select this component when system-level calibration is required to compensate for external component tolerances and environmental drift. Ideal for high source impedance applications due to minimal input bias current. Suitable for portable instruments where micropower consumption and low voltage operation are critical design constraints.

Part Context

This part belongs to the ALD2721E/ALD2721 family of dual micropower CMOS operational amplifiers manufactured by Advanced Linear Devices. It serves as the dual-channel version of the ALD1721E/ALD2721 single-channel amplifier, offering identical EPAD trimming capabilities within a compact 14-pin package configuration.

Replacement Considerations

Consult factory documentation for high-temperature versions if extended operating ranges are needed. Verify pinout compatibility with existing designs, noting that unused pins must be connected to supply voltages to prevent oscillation.

FAQ

How does the EPAD technology function during operation?

EPAD technology utilizes internal CMOS FETs as in-circuit elements for trimming offset voltage bias characteristics. Once programmed via software control, the set parameters are stored indefinitely within the device even after power-down.

What is the maximum load capacitance supported?

The device supports capacitive loading up to 50pF while maintaining stability, making it effective as an analog signal buffer for high source impedance sensors.