LM393

The LM393 is an IC consisting of two independent, high-precision voltage comparators with low offset voltage, 2.0mV maximum. It is designed for wide voltage range, single-supply operation, and can also be operated from dual supplies; the supply current drain is independent of the supply voltage. A key feature is that the common-mode input voltage range of the comparators extends to ground level, even with single-supply operation. Typical applications include limiters, simple ADCs, pulse generators, square wave generators, delay generators, wide-range VCOs, MOS clock timers, multivibrators, and high-voltage digital logic gates. The LM393 is designed to directly interface with TTL and CMOS; when operated from dual supplies, it is compatible with MOS logic — a distinct advantage of the low-power LM393 over standard comparators.

Applications

• Limiter
• Simple A/D converter
• Pulse generator
• Square wave generator
• Delay generator
• Wide-frequency VCO
• MOS clock timer
• Multi-frequency oscillator
• High-level digital logic gate circuit
• Two-stage high-frequency VCO
• Limit comparator
• Crystal-controlled oscillator
• Dual-supply applications
• Zero-crossing detector
• Comparator with negative reference voltage

Key features

• Wide supply voltage range:
• Single supply: 2.0V to 36V
• Dual supply: ±1.0V to ±18V
• Low supply current consumption (0.4mA)
• Low input bias current: 25nA
• Low input offset current: ±5nA
• Maximum input offset voltage: ±3mV
• Input common-mode voltage range extends close to ground
• Differential input voltage range equals supply voltage
• Low output saturation voltage: 250mV @ 4mA
• Output compatible with TTL, DTL, ECL, MOS, and CMOS logic families