ALD4302APBL

Overview

The ALD4302APBL is a monolithic quad precision voltage comparator utilizing advanced silicon gate CMOS technology. It features an extremely high input impedance of 10^12 ohms and low input bias current of 10pA, making it suitable for high source impedance applications. The device operates on a single +5V to +10V or dual ±5V supply with a typical supply current of 150 µA per comparator. It provides push-pull outputs capable of sinking up to 60mA and sourcing 10mA, ensuring compatibility with TTL, CMOS, and NMOS logic families.

Feature Summary

• High input impedance and low bias current minimize source impedance effects
• Push-pull output stage supports wired-OR connections without pull-up resistors
• Compatible with TTL, CMOS, and NMOS logic levels
• Low power consumption with fast response times for large and small signals

Applications

• MOSFET driver circuits
• High speed LED drivers
• Multiple limit window comparators
• Battery operated instruments
• Photo-detector sensor circuits

Procurement Notes

Verify the specific suffix 'PBL' corresponds to the 14-pin Plastic DIP package (PDIP-14) as indicated in the ordering information table. Confirm that the component meets lead-free requirements if necessary, as the datasheet notes an 'L' suffix denotes lead-free versions. Ensure the operating temperature range aligns with your application needs, as the PBL package is rated for 0°C to +70°C.

Selection Notes

Select this component when high input impedance and low standby power are critical alongside significant output drive capability. It is ideal for precision voltage comparison in single-supply systems where ground-referenced inputs are required. Consider the 60mA sink current for direct driving of relays or LEDs without external buffers. Evaluate thermal constraints if operating near maximum current limits due to self-heating effects.

Part Context

This part belongs to the ALD4302A/ALD4302 family of quad precision CMOS voltage comparators manufactured by Advanced Linear Devices. The family includes variants such as the SBL (SOIC) and DB (CERDIP) packages. The ALD4302A typically offers tighter offset voltage specifications compared to the standard ALD4302, though both share identical pinouts and general electrical characteristics.

Replacement Considerations

The datasheet explicitly mentions compatibility with open drain circuits like the ALD2301 and ALD2303 for wired-OR configurations. No direct substitute part numbers are provided in the documentation.