ALD2321ASCL

Overview

The ALD2321ASCL is a dual precision CMOS voltage comparator utilizing EPAD® electronic-trimming technology. It features ultra-low offset voltages and input bias currents, enabling the detection of signals as low as 0.004pW without external amplification. The device operates on single (+5V) or dual (±5V) supplies within a 4V to 10V range. Each comparator provides separate push-pull outputs with a high current sink capability of up to 50mA and a source capability of 2mA. It includes four e-trim pins for factory offset adjustment.

Feature Summary

• Ultra-low signal power detection capability down to 4 femtowatts
• Integrated electronic trimming for minimal input offset voltage
• Dual complementary output drivers allowing flexible configuration
• High-speed response suitable for small and large level signals

Applications

• Dual limit window comparators
• Power supply voltage monitoring
• Photo-detector sensor circuits
• Relay or LED driver interfaces
• Battery operated instruments

Procurement Notes

Verify that the ordering suffix 'SCL' corresponds to the 16-lead Small Outline Plastic DIP (SOIC) package. Confirm the specific grade suffix (A, B, or none) matches the required offset voltage specifications. Ensure lead-free compliance if required by the application environment. Check the operating temperature range against the package type, as the SOIC variant supports 0°C to +70°C.

Selection Notes

Select this component when high impedance sources require direct interfacing without pre-amplification stages. Choose the ALD2321ASCL for applications demanding precise threshold detection near ground potential. Consider the dual complementary outputs for driving both NPN and MOSFET loads simultaneously. Evaluate the low supply current consumption for battery-powered designs requiring extended operational life.

Part Context

This part belongs to the ALD2321 series of monolithic precision dual voltage comparators manufactured by Advanced Linear Devices. The series utilizes advanced silicon gate CMOS technology to achieve high input impedance and low power dissipation. The ALD2321ASCL specifically denotes the SOIC package version, distinct from the PDIP or CERDIP variants available in the same family.

Replacement Considerations

Direct pin-compatible substitutes include the ALD2321APCL (PDIP package) and ALD2321ADC (CERDIP package). Verify that alternative packages maintain the same electrical characteristics and thermal performance requirements for the specific installation constraints.