LTC6943 - Micropower, Dual Precision Instrumentation Switched Capacitor Building Block

Features

  • Low Power, IS = 60µA(Max)
  • Robust, Latch Up Proof
  • Instrumentation Front End with 120dB CMRR
  • Precise, Charge-Balanced Switching
  • Operates from 5V to 18V
  • Internal or External Clock
  • Operates up to 5MHz Clock Rate
  • Two Independent Sections with One Clock
  • Tiny SSOP-16 Package

Typical Application

LTC6943 Typical Application
LTC6943 Typical Application

Description

The LTC6943 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 LTC6943 can also be driven with an external CMOS clock.

The LTC6943, 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 LTC6943 is manufactured using Linear Technology’s enhanced LTCMOSTM silicon gate process, and it is functionally compatible with the LTC1043.

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
LTC6943CGN#PBF SSOP-16 GN C 05-08-1641 (GN16) Yes
LTC6943CGN#TRPBF SSOP-16 GN C 05-08-1641 (GN16) Yes
LTC6943HGN#PBF SSOP-16 GN H 05-08-1641 (GN16) Yes
LTC6943HGN#TRPBF SSOP-16 GN H 05-08-1641 (GN16) Yes
LTC6943IGN#PBF SSOP-16 GN I 05-08-1641 (GN16) Yes
LTC6943IGN#TRPBF SSOP-16 GN I 05-08-1641 (GN16) Yes


LTC6943 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
LTC6943CGN#PBF SSOP-16 C $4.29 $3.00 Yes
LTC6943CGN#TRPBF SSOP-16 C $3.06 Yes
LTC6943HGN#PBF SSOP-16 H $4.91 $3.45 Yes
LTC6943HGN#TRPBF SSOP-16 H $3.51 Yes
LTC6943IGN#PBF SSOP-16 I $4.91 $3.45 Yes
LTC6943IGN#TRPBF SSOP-16 I $3.51 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

  • Ultra Precision Voltage Inverters, Multipliers and Dividers
  • V–F and F–V Converters
  • Sample-and-Hold
  • Current Sources
  • Precision Instrumentation Amplifiers

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Design Tools

Linear Technology provides a variety of custom design simulation tools and device models to allow even novice designers to quickly and easily evaluate circuits using high performance switching regulators, amplifiers, data converters, filters and more. Please visit our Design Tools page to view and download:

  • LTspice - A powerful SPICE simulator, schematic capture and waveform viewer with enhancements and models for easing the simulation of switching regulators
  • LTpowerCAD - A complete power supply selection, synthesis and design tool
  • LTpowerPlay - A development environment supporting Linear Technology's Digital Power System Management (PSM) products
  • PScope & QuikEval - USB-based product demonstration and data acquisition system for use with our ADCs, DACs, and more
  • Linduino - Arduino compatible system for developing and distributing firmware libraries and example code
  • LinearLab Tools - A collection of Matlab and Python programs that provide direct access to Linear Technology’s data converter evaluation boards
  • And More!

Technical Support