ALD1712APAL

Overview

The ALD1712APAL is a rail-to-rail precision operational amplifier manufactured by Advanced Linear Devices. It operates on single +5V to +10V or dual ±2.5V to ±5.0V supplies. Key electrical parameters include a unity gain bandwidth of 1.5MHz, a slew rate of 2.1V/µs, and an input bias current as low as 0.01pA. The device features symmetrical complementary output drive with voltages within 2mV of the rails and can drive up to 4000pF capacitive loads at a gain of 5. It utilizes an ACMOS process for robust performance in temperature-extreme environments.

Feature Summary

• Rail-to-rail input and output operation allows signal swing from supply rail to supply rail without loss of operating voltage margin.
• Input stage operates linearly up to 300mV beyond the supply rails without adverse effects or phase reversals.
• Extremely low input bias currents ensure minimal distortion of analog signals from high-impedance sources.
• Internally compensated for unity gain stability, eliminating the need for external frequency compensation components.

Applications

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

Procurement Notes

Verify that the specific part number suffix matches the required package type and temperature rating. Confirm RoHS compliance status if lead-free materials are mandated for the assembly process. Ensure the ordering quantity aligns with manufacturer minimums and check for any specific handling requirements due to ESD sensitivity during procurement and storage.

Selection Notes

Select this component when designing circuits requiring full signal swing near power supply rails in low-voltage single-supply or dual-supply systems. It is suitable for applications demanding high input impedance and low leakage, such as sensor interfaces. Consider the 1.5MHz bandwidth and 2.1V/µs slew rate for moderate-speed signal processing tasks where precision and low power consumption are prioritized over high-frequency performance.

Part Context

This device belongs to the ALD1712 family of rail-to-rail precision operational amplifiers. Variants include the ALD1712A and ALD1712B, which differ primarily in offset voltage specifications. The APAL suffix indicates an 8-pin Plastic DIP package with a commercial operating temperature range of 0°C to +70°C. Other packages include SOIC and CERDIP options for different thermal and mechanical requirements.

Replacement Considerations

Direct pin-compatible substitutes may include other rail-to-rail CMOS op-amps with similar bandwidth and supply voltage ranges. Verify that replacement devices meet the specific input bias current and offset voltage drift requirements. Ensure the alternative supports the same load capacitance capabilities and maintains stability in unity gain configurations.

FAQ

Does the ALD1712APAL require external frequency compensation?

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

What is the maximum capacitive load the ALD1712APAL can drive?

The device can typically drive up to 4000pF of capacitive load when configured at a gain of 5.

How does the input stage handle voltages outside the supply rails?

The input stage operates linearly up to 300mV above and below the supply voltages without causing phase reversals or adverse effects.