ALD1701APAL

Overview

The ALD1701APAL is a 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 or dual supply systems ranging from +2V to +10V or ±1V to ±5V. The device offers a unity gain bandwidth of 700 kHz, a slew rate of 0.7 V/µs, and extremely low input bias current with a typical value of 1 pA and maximum of 30 pA at 25°C. It operates within an ambient temperature range of 0°C to +70°C and is housed in an 8-pin Small Outline Integrated Circuit (SOIC) package.

Feature Summary

• Rail-to-rail input and output voltage capability allows signal levels to reach the positive and negative supply rails.
• Internally compensated for unity gain stability without requiring external frequency compensation components.
• Extremely low input bias current ensures minimal distortion of analog signals from high source impedance circuits.
• Output stage provides short circuit protection and can drive resistive loads as low as 10 kΩ.

Applications

• Voltage amplifier
• Photodiode amplifier
• Data acquisition systems
• Active filters
• Picoammeter

Procurement Notes

Verify that the component matches the specific ALD1701APAL designation, which indicates the standard performance grade packaged in an 8-pin SOIC format. Confirm the operating temperature range aligns with the 0°C to +70°C specification required for your application environment. Ensure static control procedures are followed during handling due to the device's sensitivity to electrostatic discharge.

Selection Notes

Select this component when designing circuits that require operation from low voltage battery sources or mixed digital-analog power supplies. The rail-to-rail functionality maximizes dynamic range in single-supply configurations. Consider the 700 kHz bandwidth and 0.7 V/µs slew rate for applications requiring moderate speed. The low power dissipation makes it appropriate for portable instruments where energy efficiency is critical.

Part Context

The ALD1701 series includes variants such as the ALD1701A, ALD1701B, ALD1701G, and ALD1701. These devices share the same pinout and general architecture but differ in electrical specifications like offset voltage and drift. The ALD1701APAL specifically denotes the standard grade version in the plastic SOIC package, distinct from the higher precision A/B grades or the ceramic DA package options.

Replacement Considerations

The datasheet notes compatibility with industry standard pin configurations found in µA741 and ICL7611 types. However, direct replacement requires verifying that the substitute supports rail-to-rail operation and meets the specific low voltage requirements of the original design.

FAQ

Does the ALD1701APAL require external frequency compensation?

No, the device is internally compensated for unity gain stability and does not require external compensation components.

What is the maximum supply voltage for the ALD1701APAL?

The absolute maximum supply voltage is 10.6V. For normal operation, it supports single supplies up to +10V or dual supplies up to ±5V.

How does the input switching point affect buffer applications?

The internal switching point between complementary input stages occurs approximately 1.5V below the positive supply. In unity gain buffer configurations, this may cause input offset voltage variations if the common mode voltage exceeds this point.