ALD2721PBL

Overview

The ALD2721PBL is a dual monolithic 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, consuming 200µA typical supply current. The device offers rail-to-rail input and output capabilities, a bandwidth of 700KHz, and a slew rate of 0.7V/μs. Input bias current is typically 0.01pA, with an initial input offset voltage of 50µV maximum.

Feature Summary

• Integrates Electrically Programmable Analog Device (EPAD) technology for permanent, computer-assisted offset voltage trimming without external components.
• Features rail-to-rail input and output voltage ranges compatible with low-voltage operation.
• Provides extremely low input bias currents and high open-loop gain for precision signal conditioning.
• Supports in-system programming to compensate for component tolerances and environmental drift.

Applications

• Sensor interface circuits
• Transducer biasing circuits
• Capacitive and charge integration circuits
• Biochemical probe interfaces
• Precision sample and hold amplifiers

Procurement Notes

Verify the specific suffix 'PBL' against manufacturer documentation, as standard listings indicate 'PB' for PDIP-14. Confirm availability status, as this component may be designated as not recommended for new designs. Ensure compatibility with the ALD E100 programmer if electrical trimming is required for the application.

Selection Notes

Select this component when system-level calibration is necessary to minimize total input offset voltage errors from PSRR, CMRR, and temperature drift. It is suitable for high source impedance applications due to low input bias current. Consider the limited offset program range compared to the ALD2721E variant if extensive trimming is required.

Part Context

This part belongs to the ALD2721 series of dual micropower CMOS operational amplifiers. It shares functional similarities with the ALD1721 but provides two independent channels in a single package. The EPAD feature distinguishes it from conventional op-amps by allowing post-manufacturing electrical adjustment of bias characteristics.

Replacement Considerations

ALD2721ESB

FAQ

How is the offset voltage programmed?

Offset voltage is programmed using the ALD E100 EPAD Programmer and appropriate adapter module by injecting charge into the VE pins under software control.

What happens to the programmed settings after power loss?

The set parameters are stored indefinitely within the device even after power-down, maintaining the trimmed offset voltage level.