ALD2701APAL

Overview

The ALD2701APAL is a dual monolithic CMOS micropower operational amplifier manufactured by Advanced Linear Devices. It features rail-to-rail input and output voltage ranges, making it suitable for low-voltage single (+2V to +10V) or dual (±1V to ±5V) supply systems. The device offers an extremely low typical input bias current of 1.0pA, high open-loop voltage gain up to 100V/mV, and a unity-gain bandwidth of 0.7MHz at +5V single supply. It operates within a commercial temperature range of 0°C to +70°C and is housed in an 8-pin Plastic DIP package.

Feature Summary

• Rail-to-rail input and output voltage capability allows signal levels to reach the positive and negative supply rails.
• Extremely low input bias current of 1.0pA ensures minimal distortion of analog signals from high-impedance sources.
• Internally compensated for unity gain stability without requiring external nulling resistors.
• Output short circuit protection and robust design suitable for rugged environments.

Applications

• Voltage follower/buffer/amplifier
• Photodiode amplifier
• Charge integrator
• Data acquisition systems
• Picoammeter

Procurement Notes

Verify that the specific part number suffix 'PAL' corresponds to the 8-pin Plastic DIP package and the commercial operating temperature range of 0°C to +70°C. Confirm RoHS compliance status if required, as leaded versions may be available upon request. Ensure the application environment does not exceed the absolute maximum ratings for supply voltage or power dissipation.

Selection Notes

Select this component when designing circuits with low-voltage battery supplies or mixed digital/analog systems sharing a common power source. The rail-to-rail performance is critical for maximizing dynamic range in single-supply applications. Consider the 1.0pA input bias current for interfacing with high-impedance sensors where leakage currents must be minimized.

Part Context

This device belongs to the ALD2701 family, which includes variants like ALD2701ASAL and ALD2701ADA. These variations differ primarily in packaging (SOIC, CERDIP) and operating temperature ranges (-55°C to +125°C). The ALD2701APAL specifically denotes the plastic DIP version intended for standard commercial temperature operations.

Replacement Considerations

The datasheet notes compatibility with industry-standard pin configurations found in µA741 and ICL7621 types. However, electrical parameters such as slew rate and input bias current differ significantly. Verify functional equivalence before substitution.

FAQ

Does the ALD2701APAL require external compensation?

No, the device is internally compensated for unity gain stability using a novel scheme that does not use a nulling resistor.

What is the maximum capacitive load the output can drive?

The output stage can typically drive up to 50pF capacitive loads while maintaining stability.