ALD4706PBL

Overview

The ALD4706PBL is a quad monolithic CMOS ultra micropower rail-to-rail operational amplifier manufactured by Advanced Linear Devices. It operates on single supplies from +2V to +10V or dual supplies from ±1V to ±5V, with total supply current of 200 µA maximum at 5V. Key electrical parameters include a unity gain bandwidth of 200 kHz, a slew rate of 0.17 V/µs, and an input bias current as low as 0.1 pA. The device features high open-loop voltage gain (up to 300 V/mV), output short-circuit protection, and is specified for operation within the 0°C to +70°C temperature range.

Feature Summary

• Rail-to-rail input and output voltage ranges enable full signal swing near supply rails.
• Ultra micropower consumption with extremely low input bias currents suitable for high source impedance applications.
• Internally compensated for unity gain stability without requiring external nulling resistors.
• Output stage provides short-circuit protection and can drive capacitive loads up to 25pF.

Applications

• Voltage follower and buffer circuits
• Photodiode amplifiers and picoammeters
• High-performance portable instruments
• Active filters and sample/hold amplifiers

Procurement Notes

Verify the specific package variant against the ordering suffix 'PBL', which indicates a 14-pin Small Outline Plastic DIP (SOIC) in a lead-free (RoHS) configuration. Confirm that the application environment remains within the specified commercial operating temperature range of 0°C to +70°C. Ensure static control procedures are followed during handling due to ESD sensitivity. Cross-reference the pinout with standard LM324 or ICL7641 configurations if replacing legacy components.

Selection Notes

Select this component when designing battery-operated systems requiring low power dissipation and wide dynamic input/output voltage ranges. The ALD4706PBL is appropriate for applications demanding high input impedance and minimal warm-up time. Consider the trade-off between its moderate slew rate and ultra-low quiescent current. Verify that the load requirements do not exceed the specified resistive and capacitive drive capabilities.

Part Context

The ALD4706 series includes variants such as the ALD4706ASBL, ALD4706APBL, and ALD4706ADB, differentiated by package type and operating temperature range. The PBL suffix specifically denotes the plastic SOIC package intended for commercial temperature operations. This part belongs to a family of CMOS operational amplifiers designed for compatibility with industry-standard pinouts while offering enhanced performance in low-voltage environments.

Replacement Considerations

The datasheet notes compatibility with LM324 and ICL7641 pin configurations. No specific substitute part numbers are documented in the provided material.

FAQ

Does the ALD4706PBL require external frequency compensation?

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

What is the typical input bias current for this amplifier?

The typical input bias current is 0.1 pA, which is attributed to reverse bias leakage currents of internal protection diodes.