LT1011/LT1011A - Voltage Comparator

The LT1011 is a general purpose comparator with significantly better input characteristics than the LM111. Although pin compatible with the LM111, it offers four times lower bias current, six times lower offset voltage and five times higher voltage gain. Offset voltage drift, a previously unspecified parameter, is guaranteed at 15μV/°C. Additionally, the supply current is lower by a factor of two with no loss in speed. The LT1011 is several times faster than the LM111 when subjected to large overdrive conditions. It is also fully specified for DC parameters and response time when operating on a single 5V supply. The LT1011 retains all the versatile features of the LM111, including single 3V to ±18V supply operation, and a floating transistor output with 50mA source/sink capability. It can drive loads referenced to ground, negative supply or positive supply, and is specified up to 50V between V– and the collector output. A differential input voltage up to the full supply voltage is allowed, even with ±18V supplies, enabling the inputs to be clamped to the supplies with simple diode clamps.

  • Pin-Compatible with LM111 Series Devices
  • Guaranteed Max. 0.5mV Input Offset Voltage
  • Guaranteed Max. 25nA Input Bias Current
  • Guaranteed Max. 3nA Input Offset Current
  • Guaranteed Max. 250ns Response Time
  • Guaranteed Min. 200,000 Voltage Gain
  • 50mA Output Current Source or Sink
  • ±30V Differential Input Voltage
  • Fully Specified for Single 5V Operation
  • Available in 8-Lead PDIP and SO Packages
Typical Application
LT1011 Typical Application
LT1011 Typical Application
  • SAR A/D Converters
  • Voltage to Frequency Converters
  • Precision RC Oscillator
  • Peak Detector
  • Motor Speed Control
  • Pulse Generator
  • Relay/Lamp Driver
LT1011 Package Drawing
LT1011 Package Drawing
Order Information
Part NumberPackageTempPrice(1-99)Price (1k)*
Application Note
Design Note
Reliability Data
CAD Symbol
Related Products
LT1011/LT1011A - Voltage Comparator
AN12 - Circuit Techniques for Clock Sources
AN13 - High Speed Comparator Techniques
AN14 - Designs for High Performance Voltage-to-Frequency Converters
AN17 - Considerations for Successive Approximation A ->D Converters
AN2 - Performance Enhancement Techniques for Three-Terminal Regulators
AN20 - Application Considerations for an Instrumentation Lowpass Filter
AN29 - Some Thoughts on DC-DC Converters
AN30 - Switching Regulator Circuit Collection
AN67 - Linear Technology Magazine Circuit Collection, Volume III
AN7 - Some Techniques for Direct Digitization of Transducer Outputs
AN8 - Power Conditioning Techniques for Batteries
AN9 - Application Considerations and Circuits for a New Chopper-Stabilized Op Amp
DN111 - LT1510 High Efficiency Lithium-Ion Battery Charger
R088 Reliability Data
LT1011 Footprints and Symbols