GENERAL DESCRIPTION

The ALD4303A/ALD4303 is a precision monolithic high performance quad voltage comparator with open drain output built with advanced silicon gate CMOS technology. It features very high typical input impedance of 1012?; low input bias current of 10pA; very low power dissipation of 7.5μA per comparator; micropower operation; high output drive and single (+5V) or dual (±5V) power supply operation.

The input voltage range includes ground, making this comparator ideal for single supply low level signal detection with high source impedance. The ALD4303A/ALD4303 can be used in connection with other voltage comparator circuits such as the ALD2301, ALD2302, and ALD4302 voltage comparators. The outputs can be connected to a higher external voltage than V+ and used in a wired-OR connection with other open drain circuits such as the ALD2301 and ALD2303.

FEATURES

? 3V, 5V and 10V supply

? Guaranteed to drive 200? loads

? Fanout of 30LS TTL loads

? Guaranteed maximum supply current of 22μA per comparator

? Industry standard pinout of LM393 type

? Extremely low input bias currents -- typically 10pA

? Virtually eliminates source impedance effects

? Single (+5V) and dual supply (±5V) operation

? CMOS, NMOS and TTL compatible

? Open drain wired-OR outputs

? Compatible with push-pull outputs

? High output sinking current -- typically 60mA

? Low supply current spikes

? High gain -- 100V/mV

APPLICATIONS

? Sensor detection circuits

? PCMCIA instruments

? MOSFET driver

? High source impedance voltage comparison circuits

? Multiple limit window comparator

? Power supply voltage monitor

? Photodetector sensor circuit

? High speed LED driver

? Oscillators

? Battery operated instruments

? Remote signal detection

? Multiple relay drivers