ALD2331PAL

Overview

The ALD2331PAL is a dual precision CMOS voltage comparator in an 8-pin PDIP package. It features ultra-low input offset voltages and currents, with typical values of 0.5mV and 10pA respectively. The device operates on single (+5V) or dual (±5V) supplies within a 3V to 10V range. Key electrical parameters include a response time of 750ns for a 10mV step, 55µA supply current per comparator, and 50mA open-drain output sink capability.

Feature Summary

• Integrates input pre-amplifier, precision comparator, and high-current driver on-chip
• Offers extremely low input bias currents to minimize source impedance effects
• Provides wired-OR open-drain outputs compatible with various external pull-up voltages
• Maintains pinout compatibility with industry standard LM193 comparators

Applications

• High source impedance voltage comparison circuits
• Dual limit window comparator configurations
• Photo-detector sensor monitoring circuits
• Battery operated instruments requiring low standby power
• Remote signal detection systems

Procurement Notes

Verify the specific suffix 'PAL' corresponds to the 8-pin Plastic DIP package variant when sourcing. Confirm lead-free status if required by assembly specifications. Ensure operating temperature range requirements align with the commercial grade specification of 0°C to +70°C. Cross-reference ordering codes with manufacturer documentation to distinguish between A, B, and standard variants based on offset voltage tolerances.

Selection Notes

Select this component for applications demanding high input impedance and low power consumption. The open-drain architecture allows flexible interfacing with TTL, CMOS, or NMOS logic levels. Consider the 50mA sink current capability for direct driving of relays or LEDs without additional buffering. Evaluate the 3V to 10V supply range against system power constraints.

Part Context

This part belongs to the ALD2331 family of dual precision voltage comparators manufactured by Advanced Linear Devices. The family utilizes silicon gate EPAD CMOS technology to achieve high performance in analog applications. The PAL designation specifically identifies the through-hole plastic DIP packaging option within the broader product line that also includes surface mount SOIC variants.

Replacement Considerations

The datasheet notes pinout compatibility with the LM193 industry standard voltage comparator. Verify electrical parameter alignment before substitution.