LTC1043 - Dual Precision Instrumentation Switched-Capacitor Building Block

Features

  • Instrumentation Front End with 120dB CMRR
  • Precise, Charge-Balanced Switching
  • Operates from 3V to 18V
  • Internal or External Clock
  • Operates up to 5MHz Clock Rate
  • Low Power
  • Two Independent Sections with One Clock

Typical Application

LTC1043 Typical Application
LTC1043 Typical Application

Description

The LTC™1043 is a monolithic, charge-balanced, dual switched capacitor instrumentation building block. A pair of switches alternately connects an external capacitor to an input voltage and then connects the charged capacitor across an output port. The internal switches have a break-before-make action. An internal clock is provided and its frequency can be adjusted with an external capacitor.The LTC1043 can also be driven with an external CMOS clock.

The LTC1043, when used with low clock frequencies, provides ultra precision DC functions without requiring precise external components. Such functions are differential voltage to single-ended conversion, voltage inversion, voltage multiplication and division by 2, 3, 4, 5, etc. The LTC1043 can also be used for precise VµF and FµV circuits without trimming, and it is also a building block for switched capacitor filters, oscillators and modulators.

The LTC1043 is manufactured using Linear Technology’s enhanced LTCMOS® silicon gate process.

Packaging

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
Drawing
RoHS
LTC1043CN#PBF N-18 N C 05-08-1510 (N18) Yes
LTC1043CSW#PBF SW-18 SW C 05-08-1620 (SW18) Yes
LTC1043CSW#TRPBF SW-18 SW C 05-08-1620 (SW18) Yes


LTC1043 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
(1-99)
Price
(1k)*
RoHS
LTC1043CN#PBF N-18 C $3.42 $2.85 Yes
LTC1043CSW#PBF SW-18 C $3.75 $3.00 Yes
LTC1043CSW#TRPBF SW-18 C $3.10 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

Applications

  • Precision Instrumentation Amplifiers
  • Ultra Precision Voltage Inverters, Multipliers and Dividers
  • V-F and F-V Converters
  • Sample and Hold
  • Switched-Capacitor Filters

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Design Tools

LTspice

LTspice® software is a powerful, fast and free simulation tool, schematic capture and waveform viewer with enhancements and models for improving the simulation of switching regulators. Click here to download LTspice

Models for the following parts are available in LTspice:
LTC1043

Technical Support