ALD2704SAL

Overview

The ALD2704SAL is a dual monolithic CMOS operational amplifier featuring rail-to-rail input and output voltage ranges. It offers a slew rate of 5.0 V/µs, unity gain bandwidth of 2.1 MHz, and typical input bias current below 1.0 pA. The device operates on supply voltages from ±3.25V to ±5.0V (6.5V to 10.0V single supply) with a supply current of 5.0 mA. It provides symmetrical push-pull output drives up to 10mA, short circuit protection at approximately 15mA, and settles to 0.1% in 2µs. Operating temperature range is 0°C to +70°C.

Feature Summary

• Rail-to-rail input and output voltage ranges expand signal voltage range for given operating supply voltages.
• Symmetrical push-pull output stage capable of sourcing and sinking 10mA into loads.
• Extremely low input bias currents typically less than 1.0pA ideal for high source impedance applications.
• Internally compensated for unity gain stability without external frequency compensation.

Applications

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

Procurement Notes

Verify the specific ordering suffix 'SAL' corresponds to the 8-pin Small Outline Plastic DIP (SOIC) package variant as defined in the manufacturer's ordering information table. Confirm that the lead-free (RoHS) status aligns with project requirements, noting that the 'L' suffix denotes lead-free compliance. Ensure the operating temperature range of 0°C to +70°C meets environmental specifications before procurement.

Selection Notes

Select this component when rail-to-rail performance is required with low power consumption and high input impedance. It serves as an alternative to J-FET input amplifiers in low voltage battery-operated systems. Consider the 2.1 MHz bandwidth and 5V/µs slew rate for moderate-speed signal conditioning. Verify load capacitance limits, as it drives up to 4000pF at a gain of 5 but only 400pF at unity gain.

Part Context

The ALD2704 series includes variants ALD2704A, ALD2704B, and ALD2704, differentiated primarily by input offset voltage precision. The ALD2704SAL specifically utilizes the SOIC-8 surface mount package. This family is manufactured using Advanced Linear Devices' enhanced ACMOS silicon gate process, designed for reliability and cost-effectiveness in analog signal processing applications.

Replacement Considerations

Direct pin-compatible replacements within the same package are limited to other ALD2704 variants such as ALD2704ASAL or ALD2704BSAL, depending on required offset voltage specifications. Cross-family replacements require verification of pinout compatibility and electrical parameter alignment.

FAQ

What is the maximum capacitive load the ALD2704SAL can drive?

The device can drive up to 4000pF of capacitive load at a gain of 5. At unity gain, it is stable driving up to 400pF of external load capacitance.

How does the input voltage range behave relative to the supply rails?

The input voltage range extends beyond the positive power supply voltage V+ or negative power supply voltage V- by up to 300mV, providing true rail-to-rail capability.

Is external frequency compensation required for the ALD2704SAL?

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