ALD2702BSAL

Overview

The ALD2702BSAL is a dual monolithic CMOS operational amplifier from Advanced Linear Devices, Inc., housed in an 8-pin Small Outline Plastic DIP (SOIC) package. It features rail-to-rail input and output voltage ranges, making it suitable for +5V single supply or ±2.5V to ±5V dual supply systems. Key electrical parameters include a unity gain bandwidth of 1.5MHz, a slew rate of 1.9V/µs, and typical input bias currents below 1pA. The device offers high voltage gain, low offset voltage drift, and internal compensation for unity gain stability.

Feature Summary

• Rail-to-rail input and output voltage ranges enable full signal swing without losing operating margin.
• Extremely low input bias currents typically less than 1pA make the device ideal for high source impedance applications.
• Internal frequency compensation ensures unity gain stability without external components.
• Robust design with output short circuit protection supports operation in temperature-extreme environments.

Applications

• Voltage follower/buffer circuits
• Photodiode amplifiers
• Data acquisition systems
• Active filters
• Sample/Hold amplifiers

Procurement Notes

Verify the specific suffix 'SAL' corresponds to the 8-pin SOIC plastic package variant when ordering. Confirm that the component meets RoHS compliance requirements if applicable to your manufacturing process. Ensure static control procedures are followed during handling due to ESD sensitivity. Cross-reference the manufacturer's latest datasheet revision to confirm pinout and electrical specifications match your design requirements before finalizing procurement.

Selection Notes

Select this component for analog applications requiring precision and low power consumption within a 5V system architecture. The rail-to-rail capability allows for maximum dynamic range in single-supply designs. Consider the 1.5MHz bandwidth and 1.9V/µs slew rate for signal conditioning tasks where moderate speed is required. The low input bias current minimizes errors in high-impedance sensor interfaces, while the internal trimming reduces the need for external nulling circuits.

Part Context

The ALD2702 series includes variants such as the ALD2702ASAL, ALD2702APAL, and ALD2702ADA, distinguished by their package types and operating temperature ranges. The ALD2702BSAL specifically denotes the B-grade version in the SOIC package, offering tighter offset voltage specifications compared to the standard ALD2702. This family is designed for versatile use in portable instruments and industrial sensors.

Replacement Considerations

Direct substitutes may include other dual rail-to-rail CMOS op-amps with similar pinouts and electrical characteristics. Verify compatibility regarding input bias current, bandwidth, and supply voltage ranges. Ensure the replacement device supports the required load capacitance and maintains stability in unity gain configurations.

FAQ

What is the maximum load capacitance the ALD2702BSAL can drive?

In a non-inverting unity gain connection, the device can typically drive up to 400pF of capacitive load. In an inverting unity gain configuration, it can drive up to 800pF.

Does the ALD2702BSAL require external frequency compensation?

No, the device is internally compensated for unity gain stability using a novel scheme, eliminating the need for external frequency compensation components.

What is the typical input bias current for this operational amplifier?

The typical input bias current is less than 1pA at room temperature, which helps prevent distortion of analog signals from high-impedance sources.