LTC6943 查看數據表（PDF） - Linear Technology

零件编号

产品描述 (功能)

生产厂家

LTC6943

Micropower, Dual Precision Instrumentation Switched Capacitor Building Block

Linear Technology 

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 PaUckage

APPLICATIO S

■ Ultra Precision Voltage Inverters, Multipliers

and Dividers

■ V–F and F–V Converters

■ Sample-and-Hold

■ Current Sources

■ Precision Instrumentation Amplifiers

, LTC and LT are registered trademarks of Linear Technology Corporation.

LTCMOS is a trademark of Linear Technology Corporation.

TYPICAL APPLICATIO

Precision Voltage Controlled Current Source

with Ground Referred Input and Output

5V

INPUT 3 +

5

0V TO 3.7V

1

LTC2050

4–

2

0.68µF

5V

1k

3

1/2 LTC6943

7

6

9

1µF

1µF

1k

10

12

11

15

14

0.001µF

IOUT =

VIN

1000Ω

OPERATES FROM A

SINGLE 5V SUPPLY

6943 • TA01a

LTC6943

Micropower, Dual Precision

Instrumentation Switched

Capacitor Building Block

DESCRIPTIO

The LTC®6943 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 func-

tionally compatible with the LTC1043.

Precision Current Sensing in Supply Rails

I

POSITIVE OR

NEGATIVE RAIL

E

RSHUNT

1/2 LTC6943

11

12

10

1µF

1µF

9

E I= E

RSHUNT

6

7

14

15

0.01µF

6943 • TA01b

6943f

1

Share Link: