ALD2331ASAL

Overview

The ALD2331ASAL is a dual precision CMOS voltage comparator with open-drain output drivers, manufactured by Advanced Linear Devices. It utilizes silicon gate EPAD® CMOS technology for high-precision analog applications. The device operates on single (+5V) or dual (±5V) power supplies within a 3V to 10V range. Key electrical characteristics include an input bias current of 10pA, typical response time of 750ns with a 10mV step, and low power dissipation of 55µA per comparator. It features a 50mA open-drain sink current capability and fits in an 8-pin SOIC package.

Feature Summary

• Ultra-low input offset voltages and currents integrated with a pre-amplifier and output driver
• Open-drain outputs allowing wired-OR connections and flexible pull-up resistor selection
• High-speed performance for both large and small level signals
• CMOS, NMOS, and TTL compatible logic levels

Applications

• Simple precision reference voltage setting
• High source impedance voltage comparison circuits
• Dual limit window comparator
• Photo-detector sensor circuit
• Battery operated instruments

Procurement Notes

Verify the specific suffix 'SAL' corresponds to the 8-pin Small Outline Integrated Circuit (SOIC) package variant when ordering. Confirm that the lead-free designation aligns with project requirements. Ensure the selected grade matches the required offset voltage specifications, as the datasheet lists variations such as A and B grades with different performance thresholds.

Selection Notes

Select this component for applications requiring low standby power combined with high output current drive capabilities. The wide common-mode input voltage range including ground makes it suitable for low-level signal detection. Consider the open-drain architecture if interfacing with varying logic voltage levels via external pull-up resistors.

Part Context

This part belongs to the ALD2331 family, which includes variants like the ALD2331APAL and ALD2331ASAL. These devices are designed as industry-standard replacements for comparators like the LM193, offering enhanced precision through advanced CMOS technology while maintaining pinout compatibility.

Replacement Considerations

The datasheet indicates the ALD2331 series maintains pinout compatibility with the LM193 industry standard voltage comparator. Verify functional equivalence regarding supply voltage ranges and output drive capabilities before substitution.