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 1012Ω; 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 200Ω 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