ALD2721ESBL

Overview

The ALD2721ESBL is a dual precision CMOS operational amplifier featuring rail-to-rail input and output capabilities. It incorporates Electrically Programmable Analog Device (EPAD) technology for user-programmable offset voltage adjustment, allowing in-system calibration to compensate for component tolerances and environmental factors. The device operates on supply voltages ranging from ±1V to ±5V with a typical supply current of 200μA per amplifier. Key electrical specifications include a bandwidth of 700kHz, a slew rate of 0.7V/μs, an initial input offset voltage of 35μV (ALD2721E), and an input bias current of 0.01pA. It is housed in a 14-pin Small Outline Plastic Dip (SOIC) package.

Feature Summary

• Integrates EPAD technology for computer-assisted, user-programmable offset voltage trimming that persists after power-down.
• Features rail-to-rail input and output voltage ranges compatible with low-voltage single-supply or dual-supply systems.
• Provides extremely low input bias currents and high open-loop gain suitable for high-impedance sensor interfaces.
• Supports application-specific and in-system programming modes to minimize total system offset errors.

Applications

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

Procurement Notes

Verify the specific suffix 'L' against official manufacturer documentation, as standard datasheets list 'SB', 'PB', and 'DB' variants without this suffix. Confirm RoHS compliance status, as some ALD listings indicate non-compliance while others specify Yes. Ensure the ordering code matches the exact temperature range and package requirements defined in the manufacturer's current catalog.

Selection Notes

Select the ALD2721E variant if precise programmable offset voltage adjustment within a wider range is required. Choose the standard ALD2721 if minimal programming is needed. Consider the SOIC package for surface-mount applications requiring small functional volume. Verify that the application circuit can accommodate the programming pulses and that VExx pins are shielded from digital noise during operation.

Part Context

The ALD2721 series belongs to Advanced Linear Devices' EPAD family of micropower CMOS operational amplifiers. This family utilizes proprietary electrically programmable analog devices to replace traditional mechanical trimming methods. The dual-channel configuration allows independent programming for each amplifier channel, enhancing flexibility in precision analog signal conditioning designs.

Replacement Considerations

Direct replacements include ALD2721ESB (standard SOIC package). For higher temperature ratings, consider ALD2721EDB. Verify pin compatibility and EPAD programmer support when substituting.