LTC1542 - Micropower Op Amp, Comparator and Reference

The LTC1541/LTC1542 combine a micropower amplifier, comparator and bandgap reference (LTC1541) in an 8-pin package. The part operates from a single 2.5V to 12.6V or dual ±1.25V to ±6.3V supply with a typical supply current of 5µA. Both the op amp and comparator feature a common mode input voltage range that extends from the negative supply to within 1.3V of the positive supply. The op amp output stage swings from rail-to-rail. The comparator's inverting input is internally connected to the reference output (LTC1541).

The reference output voltage is 1.2V ±1% over the extended temperature range. The output can drive a bypass capacitor of up to 0.01µF without any oscillations. It can also source up to 2mA and sink up to 20µA.

The op amp is internally compensated to be unity-gain stable with typical GBW at 12kHz and slew rate of 8V/ms. The comparator has ±2.25mV of internal hysteresis to ensure clean output switching, even with slow moving input signals.

The LTC1541/LTC1542 are available in MSOP and SO-8 packages. For space-limited applications, the LTC1541/LTC1542 are available in a 3mm x 3mm low profile(0.8mm) dual fine-pitch leadless package (DFN).

  • Quiescent Current: 5µA Typ
  • Outputs Swing Rail-to-Rail
  • Low Op Amp Offset Voltage: 700µV Max
  • Reference Output Drives 0.01µF Capacitor
  • Internal 1.2V ±0.4% Reference Output (LTC1541)
  • Low Input Bias Current: 1nA Max
  • Reference Output Can Source Up to 2mA
  • Internal ±2.25mV Comparator Hysteresis
  • Comparator and Op Amp Input Range Includes Ground
  • Op Amp Capable of Driving Up to 1000pF Load
  • Unity-Gain Stable and 12kHz Bandwidth
  • 2.5V to 12.6V Supply Voltage Range
  • Pin Compatible Upgrade for MAX951/MAX953
  • Available in 3mm x 3mm x 0.8mm DFN Package
Typical Application
LTC1542 Typical Application
LTC1542 Typical Application
  • Battery- or Solar-Powered Systems
  • Automotive Keyless Entry
  • Low Frequency, Local Area Alarms/Detectors
  • Infrared Receivers for Remote Controls
  • Smoke Detectors and Safety Sensors
  • GSM Portable Phones
LTC1542 Package Drawing
LTC1542 Package Drawing
LTC1542 Package Drawing
LTC1542 Package Drawing
LTC1542 Package Drawing
LTC1542 Package Drawing
Order Information
Part NumberPackageTempPrice(1-99)Price (1k)*
LTC1542CDD#PBF3x3 DFN-8C$1.94$1.45
LTC1542CDD#TRPBF3x3 DFN-8C$1.50
LTC1542IDD#PBF3x3 DFN-8I$2.13$1.61
LTC1542IDD#TRPBF3x3 DFN-8I$1.66
Reliability Data
Product Selector Card
CAD Symbol
Related Products
LTC1541/LTC1542 - Micropower Op Amp, Comparator and Reference
R312 Reliability Data
High Speed Comparators
LTC1542 Footprints and Symbols