LTC1040 - Dual Micropower Comparator


  • Micropower
    1.5µW (1 Sample/Second)
  • Power Supply Flexibility
    Single Supply 2.8V to 16V
    Split Supply ±2.8V to ±8V
  • Guaranteed Max Offset 0.75mV
  • Guaranteed Max Tracking Error Between Input Pairs ± 0.1%
  • Input Common Mode Range to Both Supply Rails
  • TTL/CMOS Compatible with ±5V or Single 5V Supply
  • Input Errors are Stable with Time and Temperature

Typical Application

LTC1040 Typical Application
LTC1040 Typical Application


The LTC™1040 is a monolithic CMOS dual comparator manufactured using Linear Technology’s enhanced LTCMOS® silicon gate process. Extremely low operating power levels are achieved by internally switching the comparator ON for short periods of time. The CMOS output logic holds the output information continuously while not consuming any power.

In addition to switching power ON, a switched output is provided to drive external loads during the comparator’s active time. This allows not only low comparator power, but low total system power.

Sampling is controlled by an external strobe input or an internal oscillator. The oscillator frequency is set by an external RC network.

Each comparator has a unique input structure, giving two differential inputs. The output of the comparator will be high if the algebraic sum of the inputs is positive and low if the algebraic sum of the inputs is negative.


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
LTC1040CN#PBF N-18 N C 05-08-1510 (N18) Yes
LTC1040CSW#PBF SW-18 SW C 05-08-1620 (SW18) Yes
LTC1040CSW#TRPBF SW-18 SW C 05-08-1620 (SW18) Yes

LTC1040 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
LTC1040CN#PBF N-18 C $2.58 $2.10 Yes
LTC1040CSW#PBF SW-18 C $3.08 $2.70 Yes
LTC1040CSW#TRPBF SW-18 C $2.80 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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