LTC1042 - Window Comparator


  • Micropower 1.5µW (1 Sample/Second)
  • Wide Supply Range - 2.8V to 16V
  • High Accuracy: Center Error ±1mV Max
    Width Error ±0.15% Max
  • Wide Input Voltage Range
    V+ to Ground
  • TTL Outputs with 5V Supply
  • Two Independent Ground-Referred Control Inputs
  • Small Size 8-Pin MiniDIP

Typical Application

LTC1042 Typical Application
LTC1042 Typical Application


The LTC1042 is a monolithic CMOS window comparator manufactured using Linear Technology’s enhanced LTCMOS silicon gate process. Two high impedance voltage inputs, CENTER and WIDTH/2, define the middle and width of the comparison window. Whenever the input voltage, VIN, is inside the window the WITHIN WINDOW output is high. The ABOVE WINDOW output is high whenever VIN is above the window. By interchanging VIN and CENTER, the ABOVE WINDOW output becomes BELOW WINDOW and is high if VIN is below the window.

Sampling techniques provide high impedance voltage inputs that can common mode to both supply rails(V+ and GND). An important feature of the inputs is their non-interaction. Also the device is effectively chopper stabilized, giving it extremely high accuracy over all conditions of temperature, power supply and input voltage range.

Another benefit of the sampling techniques used to design the LTC1042 is the extremely low power consumption. When the device is strobed, it internally turns on the power to the comparators, samples the inputs, stores the outputs in CMOS latches and then turns off power to the comparators. This all happens in about 80us. Average power can be made small, almost arbitrarily, by lowering the strobe rate. The device can be self-strobed using an external RC network or strobed externally by driving the OSC pin witha CMOS gate.


CAD Symbols and Footprints: The downloadable Zip file below contains the schematic symbol and PCB footprints.

For complete and up to date package information and drawings, please refer to our packaging page

Part Number Package Code Temp Package
LTC1042CN8#PBF N-8 N C 05-08-1510 (N8) Yes

LTC1042 Package Drawing

Order Info

  • Part numbers ending in PBF are lead free. Solder plated terminal finish (SnPb) versions are non-standard and special terms and conditions and pricing applies if available. Please contact LTC marketing for information.
  • Part numbers containing TR or TRM are shipped in tape and reel or 500 unit mini tape and reel, respectively
  • Please refer to our general ordering information or the product datasheet for more details

Package Variations and Pricing

Part Number Package Temp Price
LTC1042CN8#PBF N-8 C $2.25 $1.80 Yes
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* The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Linear Technology sales office or authorized distributor.

Demo Boards

Linear Technology offers many demo boards free of charge to qualified customers. Contact your local sales office or distributor to inquire about a demo board. Certain demo boards are also available for sale via credit card on this website. Demo boards are for evaluation purposes only. It remains the customer’s responsibility to verify proper and reliable operation in the actual end application.

Click here to view our complete list of demo boards


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  • Go/No-Go Testing
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