ALD2702SAL

Overview

The ALD2702SAL is a dual monolithic operational amplifier fabricated with silicon gate CMOS technology, housed in an 8-pin Small Outline Plastic DIP (SOIC) package. It features rail-to-rail input and output voltage ranges, allowing operation from +4V to +10V single supply or ±2.5V to ±5V dual supplies. Key electrical parameters include a unity gain bandwidth of 1.5 MHz, a slew rate of 1.9 V/µs, and typical input bias current below 1 pA. 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 1 pA make it suitable for high source impedance applications.
• Internally compensated for unity gain stability with robust design resistant to parasitic oscillations.
• On-chip offset voltage trimming allows use without external nulling in most precision applications.

Applications

• Voltage follower/buffer circuits
• Photodiode amplifiers
• Charge integrators
• Data acquisition systems
• Active filters

Procurement Notes

Verify the specific suffix 'SAL' corresponds to the 8-pin SOIC package variant when ordering. Confirm that the required operating temperature range aligns with the standard commercial grade specifications provided in the datasheet. Ensure static control procedures are followed during handling due to ESD sensitivity inherent to CMOS devices.

Selection Notes

Select this component for applications requiring low power dissipation and high input impedance in single or dual supply environments. It is appropriate for portable instruments and sensor interfaces where rail-to-rail performance minimizes voltage headroom requirements. Consider the 8-pin SOIC package constraints for PCB layout and thermal management relative to other available package options.

Part Context

The ALD2702 series includes variants such as the ALD2702A, ALD2702B, and ALD2702, differentiated primarily by offset voltage specifications. The ALD2702SAL specifically denotes the standard version packaged in an 8-pin plastic SOIC format. This family is designed for versatile analog applications in mixed digital/analog systems powered by 5V rails.

Replacement Considerations

Direct pin-compatible substitutes within the same manufacturer family include ALD2702ASAL and ALD2702BSAL, which share identical pinouts but differ in offset voltage tolerances. Cross-manufacturer replacements require verification of rail-to-rail capabilities, input bias current levels, and package dimensions to ensure functional equivalence.

FAQ

Does the ALD2702SAL require external frequency compensation?

No, the device is internally compensated for unity gain stability using a novel scheme that provides more than 70 degrees of phase margin at the unity gain frequency.

What is the maximum capacitive load the ALD2702SAL can drive?

In a non-inverting unity gain connection, it can typically drive up to 400 pF of load capacitance without stability problems. In inverting unity gain mode, it can drive double that capacitance.