ALD2731APAL

Overview

The ALD2731APAL is a precision dual micropower CMOS operational amplifier manufactured by Advanced Linear Devices. It features rail-to-rail input and output voltage ranges, making it suitable for low-voltage single or dual supply systems ranging from +2V to +10V or ±1V to ±5V. The device offers extremely low input bias current of 0.01pA typical and low offset voltage of 0.6mV typical. Key electrical specifications include a unity gain bandwidth of 0.7MHz, a slew rate of 0.7V/µs, and high open-loop voltage gain of 100V/mV. It operates within a temperature range of 0°C to +70°C and is housed in an 8-pin PDIP package.

Feature Summary

• Rail-to-rail input and output voltage capability allows full signal swing near supply rails.
• Extremely low input bias current minimizes errors with high source impedance sensors.
• On-chip offset voltage trimming via EPAD technology eliminates the need for external nulling.
• Internally compensated for unity gain stability without requiring external frequency compensation components.

Applications

• Photodiode amplifiers
• Charge integrators
• Picoammeters
• High-performance portable instruments
• Active filters

Procurement Notes

Verify that the ordering suffix 'PAL' corresponds to the lead-free (RoHS compliant) version in the 8-pin Plastic DIP package. Confirm the operating temperature range matches the application requirements, as this specific suffix denotes the commercial grade (0°C to +70°C). Ensure static control procedures are followed during handling due to ESD sensitivity.

Selection Notes

Select this component when designing circuits that require high precision with minimal power consumption in low-voltage environments. The rail-to-rail performance makes it ideal for battery-operated systems where maximizing dynamic range is critical. Consider its high input impedance for interfacing with capacitive sensors or transducers that have high output impedance.

Part Context

This part belongs to the ALD2731 family of precision dual micro-power operational amplifiers. It utilizes Advanced Linear Devices' enhanced silicon gate CMOS process. The device is pin-compatible with industry standard µA741 and ICL7611 configurations, facilitating drop-in replacements in legacy designs while offering superior CMOS performance characteristics such as lower power and higher input impedance.

Replacement Considerations

The datasheet indicates compatibility with µA741 and ICL7611 pin configurations. Verify if alternative packages like SOIC (ALD2731ASAL) or CERDIP (ALD2731ADA) are needed for different mounting styles or extended temperature ranges (-55°C to +125°C).