ALD2331SAL

Overview

The ALD2331SAL is a dual precision voltage comparator utilizing EPAD® CMOS technology in an 8-pin SOIC package. It operates on single (+5V) or dual (±5V) supplies ranging from 3V to 10V. Key electrical parameters include a typical input bias current of 10pA, supply current of 55µA per comparator, and open-drain outputs capable of sinking up to 50mA. The device features a response time of 750ns with a 10mV input step, high input impedance of 10^12Ω, and supports wired-OR configurations.

Feature Summary

• Ultra-low input bias current and offset voltage for high precision analog applications
• Open-drain output drivers allowing flexible pull-up resistor selection and higher external voltage connections
• CMOS, NMOS, and TTL compatible logic levels with high fanout capability
• Integrated input pre-amplifier and output buffers eliminating the need for secondary power supplies

Applications

• High source impedance voltage comparison circuits
• Dual limit window comparators
• Photo-detector sensor circuits
• Battery operated instruments
• Remote signal detection

Procurement Notes

Verify the specific suffix 'SAL' corresponds to the 8-pin Small Outline Package (SOIC) variant when ordering. Confirm lead-free status as indicated by the 'L' suffix in the manufacturer's ordering information. Ensure compatibility with the required operating temperature range of 0°C to +70°C for this specific package type before finalizing procurement specifications.

Selection Notes

Select the ALD2331SAL for applications requiring low standby power combined with high output current drive capabilities. The open-drain architecture necessitates external pull-up resistors; ensure these are sized appropriately for the desired load and voltage levels. Consider the 3V to 10V supply range and the inclusion of ground in the common-mode input voltage range when designing low-level signal detection circuits.

Part Context

This component belongs to the ALD2331 family, which includes variants such as ALD2331A, ALD2331B, and ALD2331PAL. The ALD2331SAL specifically denotes the standard version housed in an 8-pin plastic small outline package. It shares the same pinout as industry-standard LM193 voltage comparators, facilitating direct replacement in existing designs requiring enhanced precision and lower power consumption.

Replacement Considerations

The datasheet explicitly states that the pinout matches the industry standard LM193 voltage comparators.