ALD1732APAL

Overview

The ALD1732APAL is a precision low-power monolithic CMOS operational amplifier manufactured by Advanced Linear Devices Inc. It features an extremely low input signal power of 0.0003 fW, resulting from a typical input offset voltage of 30 µV and input bias current of 0.01 pA at 25°C. The device supports dual supplies of ±2.0V to ±5.0V or single supply up to 10.0V. Key electrical parameters include a bandwidth of 1.5 MHz, slew rate of 2.1 V/µs, and supply current of 0.8 mA. It offers rail-to-rail input and output capabilities, high open-loop gain (250 V/mV), and can drive capacitive loads up to 400 pF in unity gain mode. The component operates within a temperature range of 0°C to +70°C and is housed in an 8-PDIP package.

Feature Summary

• Extremely low input signal power draw virtually eliminates source loading effects
• Rail-to-rail input and output voltage ranges reduce required supply overhead
• Robust design suitable for operation in temperature-extreme environments
• Industry standard pinout compatible with traditional op-amp configurations

Applications

• Sensor interface circuits
• Unity gain buffer amplifier
• Capacitive and charge integration circuits
• Precision sample and hold amplifiers
• High source impedance electrode amplifiers

Procurement Notes

Verify the specific suffix 'PAL' corresponds to the 8-pin Plastic DIP package and lead-free (RoHS) compliance as defined in the ordering information. Confirm that the operating temperature range requirements align with the 0°C to +70°C specification for this package variant. Ensure static control procedures are followed during handling due to ESD sensitivity. Cross-reference the manufacturer's latest datasheet version for any updates to absolute maximum ratings or recommended operating conditions.

Selection Notes

Select the ALD1732APAL when application demands exceptionally low input bias currents and minimal input signal power to preserve signal integrity from high-impedance sources. The rail-to-rail capability makes it suitable for low-voltage single-supply systems where maximizing dynamic range is critical. Consider this component for designs requiring stability with significant capacitive loads without external compensation components. Verify that the 1.5 MHz bandwidth and 2.1 V/µs slew rate meet the signal frequency and transient response requirements of the target circuit.

Part Context

The ALD1732 series includes variants such as the ALD1732ASAL (SOIC) and ALD1732ADA (CERDIP). The ALD1732A designation typically indicates tighter offset voltage specifications compared to the standard ALD1732. The 'L' suffix denotes lead-free construction compliant with RoHS directives. These devices share the same internal architecture but differ in package type and potentially screening levels for industrial or commercial temperature ranges.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.

FAQ

How does the ALD1732APAL handle input voltages exceeding the supply rails?

The device features tolerance to over-voltage input spikes of 300mV beyond the supply rails, allowing the input voltage to equal or exceed the positive and negative supply voltages without damage.

What is the maximum capacitive load the ALD1732APAL can drive in unity gain mode?

In unity gain mode, the output stage can typically drive up to 400pF of capacitive load without stability problems.

Does the ALD1732APAL require external compensation components?

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