ALD2722PBL

Overview

The ALD2722PBL is a dual monolithic rail-to-rail precision CMOS operational amplifier featuring integrated user-programmable EPAD offset voltage adjustment. It operates on a single supply of 4.0V to 10.0V or dual supplies of ±2.0V to ±5.0V. Key electrical parameters include a bandwidth of 1.5MHz, a slew rate of 1.9V/µs, and a typical supply current of 2mA for both amplifiers. The device offers an initial input offset voltage of 25µV (typical) with a programmable range of ±5mV for the E version. Input bias current is typically 0.01pA at 25°C.

Feature Summary

• Integrates Electrically Programmable Analog Device (EPAD) technology for computer-assisted, in-system trimming of offset voltage without external components.
• Features rail-to-rail input and output voltage ranges with tolerance to over-voltage input spikes up to 300mV beyond supply rails.
• Supports high capacitive loading up to 4000pF at unity gain while maintaining stability through internal compensation.

Applications

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

Procurement Notes

Verify the specific suffix 'PBL' against manufacturer documentation to confirm package type and temperature grade. Standard ordering information lists PB as 14-Pin Small Outline Plastic Dip and DB as CERDIP. Ensure the required operating temperature range matches the selected package variant before procurement.

Selection Notes

Select this component when system-level calibration is required to compensate for external sensor errors or component tolerances. The dual-channel architecture allows independent programming of each amplifier's offset voltage. Consider the low power consumption and high input impedance for battery-operated or high-impedance source applications.

Part Context

This device belongs to the ALD2722E/ALD2722 family of dual precision CMOS operational amplifiers. It serves as the dual-channel counterpart to the single-channel ALD1722E/ALD2722. The family utilizes exclusive ALD EPAD design to provide cost-effective trimming solutions for analog applications requiring high precision voltage adjustment.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Verify pin compatibility and EPAD programmer requirements if considering alternative devices from other manufacturers.

FAQ

How does the EPAD technology handle temperature drift?

Internally, VE1 and VE2 are programmed differentially. Temperature drift effects between the two internal offset bias circuits cancel each other, introducing less net temperature drift coefficient change than techniques using external trimmer potentiometers.

What happens to the VExx pins after programming?

After programming, the VExx pins must be left open to maintain the programmed voltage levels. They can also serve as capacitively coupled input pins.