LTC6943 - Micropower, Dual Precision Instrumentation Switched Capacitor Building Block

Features

• Low Power, I_S = 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

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

SSOP-16

Order Info

• Part numbers ending in PBF are lead free. Please contact LTC marketing for information on lead based finish parts.
• 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	Pins	Temp	Price (1-99)	Price (1k)*	RoHS Data
LTC6943CGN	SSOP	16	C	$4.29	$3.00	View
LTC6943CGN#PBF	SSOP	16	C	$4.29	$3.00	View
LTC6943CGN#TR	SSOP	16	C		$3.06	View
LTC6943CGN#TRPBF	SSOP	16	C		$3.06	View
LTC6943HGN	SSOP	16	H	$4.91	$3.45	View
LTC6943HGN#PBF	SSOP	16	H	$4.91	$3.45	View
LTC6943HGN#TR	SSOP	16	H		$3.51	View
LTC6943HGN#TRPBF	SSOP	16	H		$3.51	View
LTC6943IGN	SSOP	16	I	$4.91	$3.45	View
LTC6943IGN#PBF	SSOP	16	I	$4.91	$3.45	View
LTC6943IGN#TR	SSOP	16	I		$3.51	View
LTC6943IGN#TRPBF	SSOP	16	I		$3.51	View
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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.

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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To simulate selected Linear Technology products, please download LTSpice / SwitcherCAD III. This powerful schematic capture and simulation tool includes macro models for 80% of Linear Technology's switching regulators, over 200 op amp models, as well as resistors, transistors and MOSFET models.

For other simulation tools, visit our Design Simulation and Device Models page.