ALD4303SBL

Overview

The ALD4303SBL is a quad precision micropower CMOS voltage comparator with open-drain outputs. It operates on single supplies from 3V to 10V or dual supplies of ±5V. Each comparator draws a maximum supply current of 22 µA and features an input bias current typically of 10pA. The device provides high output sinking current, typically 60mA, and supports fanout of 30 LS TTL loads. Operating temperature range for the SBL package is 0°C to +70°C.

Feature Summary

• Micropower operation with extremely low input bias currents
• High output sinking capability suitable for direct load driving
• Open-drain wired-OR compatible outputs
• CMOS, NMOS, and TTL logic compatibility

Applications

• Sensor detection circuits
• MOSFET driver stages
• Power supply voltage monitoring
• Photodetector sensor interfaces
• Battery operated instruments

Procurement Notes

Verify the specific suffix 'SBL' corresponds to the 14-pin Small Outline Plastic Dip (SOIC) package when ordering. Confirm that the required operating temperature range aligns with the commercial grade specification of 0°C to +70°C. Ensure the design accommodates the open-drain output configuration by providing appropriate pull-up resistors for the desired logic levels.

Selection Notes

Select this component for applications requiring very low quiescent power consumption alongside high output drive strength. The high input impedance makes it suitable for interfacing with high source impedance sensors without loading effects. Consider the ALD4303A variant if tighter offset voltage specifications are required compared to the standard ALD4303.

Part Context

This device belongs to the ALD4303 family of quad comparators manufactured by Advanced Linear Devices. It shares functional similarities with industry-standard LM393 types but utilizes advanced silicon gate CMOS technology to achieve significantly lower power dissipation and higher input impedance characteristics.

Replacement Considerations

The datasheet notes compatibility with other voltage comparators such as the ALD2301, ALD2302, and ALD4302. Designers may substitute these parts in mixed configurations using common V+ rails.