Input offset and bias — what they mean for the threshold
The LM2903QPWRG4Q1: Maximum input offset voltage is 7 mV at 5 V — this sets the window for the switching threshold. In a 12 V battery monitoring circuit with a 10:1 divider, 7 mV of offset at the comparator input translates to roughly 70 mV of uncertainty at the battery, well within the margin for an over-voltage or under-voltage alarm. For a high-impedance sensor front-end using 100 kΩ source resistors, the 0.25 µA bias develops a 25 mV error across the resistor — significant enough that a lower-impedance divider or a buffer ahead of the comparator is worth considering.
Output stage flexibility
The output supports CMOS, MOS, open-collector, and TTL logic levels — the open-collector option lets multiple comparators share a single pull-up resistor for wired-OR interrupt signals on a microcontroller GPIO. Typical output current is 20 mA, enough to drive a small relay or LED directly.
Temperature range and compliance
ROHS3 compliant per the manufacturer's lifecycle status — no exemption-based restrictions on EU market placement.