ALD2704BSAL

Overview

The ALD2704BSAL is a dual monolithic CMOS operational amplifier manufactured by Advanced Linear Devices. It features rail-to-rail input and output voltage ranges, with an input range extending up to 300mV beyond the supply rails. The device offers a typical slew rate of 5.0 V/µs and a unity gain bandwidth of 2.1 MHz. Input bias current is typically less than 1.0 pA (max 20 pA at 25°C). Operating electrical characteristics specify a maximum input offset voltage of 6.0 mV at 25°C and 7.0 mV over the 0°C to +70°C temperature range. Supply voltage ranges from ±3.25V to ±5.0V.

Feature Summary

• Rail-to-rail input and output voltage ranges allow signal swings close to power supply limits.
• Extremely low input bias currents ensure minimal distortion for high source impedance applications.
• High capacitive load capability supports driving loads up to 4000pF at a gain of 5.
• Internal frequency compensation ensures unity gain stability without external components.

Applications

• Voltage follower/buffer
• Photodiode amplifier
• Charge integrator
• Active filters
• Data acquisition systems

Procurement Notes

Verify the specific suffix 'SAL' corresponds to the 8-pin Small Outline Plastic package (SOIC) when ordering. Confirm that the 'B' designation indicates the tighter offset voltage specifications required for the application. Ensure the operating environment remains within the specified 0°C to +70°C range for this package variant. Cross-reference the manufacturer's latest datasheet revision to confirm pinout compatibility and absolute maximum ratings before integration.

Selection Notes

Select the ALD2704BSAL for designs requiring rail-to-rail performance with low input bias current in single or dual supply configurations. This component is suitable for replacing J-FET input amplifiers where lower operating voltages are utilized. Consider the 8-pin SOIC package constraints regarding thermal dissipation and PCB layout. Evaluate the 2.1 MHz bandwidth against the required signal frequencies to ensure adequate phase margin and settling time for the target application.

Part Context

The ALD2704 series includes variants such as the ALD2704ASAL and ALD2704SAL, differentiated primarily by input offset voltage specifications. The ALD2704BSAL specifically denotes the version with tighter offset voltage tolerances compared to the standard ALD2704. All variants share the same dual rail-to-rail architecture and are manufactured using Advanced Linear Devices' enhanced ACMOS silicon gate process.

Replacement Considerations

Direct substitutes include other parts from the ALD2704 family, such as the ALD2704ASAL or ALD2704SAL, provided the offset voltage requirements align with the design specifications. Verify pinout compatibility and package dimensions (SOIC-8) before substitution.

FAQ

What is the maximum capacitive load the ALD2704BSAL can drive?

The device can drive up to 4000pF of capacitive load when configured at a gain of 5. At unity gain, it typically drives 400pF without stability issues.

How does the input voltage range compare to the supply rails?

The input voltage range extends beyond the positive and negative power supply voltages by up to 300mV, supporting true rail-to-rail operation.

Is external frequency compensation required for the ALD2704BSAL?

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