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LTC6915IDE

Zero Drift, Precision Instrumentation Amplifier with Digitally Programmable Gain

Linear Technology 

LTC6915

Typical Application

9

X1

4MHz 10

V+ 1

V+

C5

0.1µF

10k

20

VDD

PIC16LF73

RC5/SDO

16

MOSI

OSC1/

CLKIN

RC4/SDI/SDA

15

14

MISO

SCLK

RC3/SCK/SCL

OSC2/

CLKOUT

RC2/CCP1

13 CS1

12 CS2

RC1/T1OSI/CCP2

28

RB7

MCLR/

7

VPP

RAS/AN4/SS

6

RA4/T0CLK1

VSS VSS

8

19

ZETEK

ZXM61P02F

R < 10K

BRIDGE

SENSOR

1 SHDN

V+ 16

2 IN– LTC6915 OUT 15

3 IN+

SENSE 14

4 V–

REF 13

5 HOLD_THRU NC 12

6 CS(D0) PAR_SER 11

7 DIN(D1)

8 CLK(D2)

DGND 10

DOUT(D3) 9

C1

0.1µF

V+

C2

0.1µF

1.25V

1

VCC

2 REF+

SDO 8

3

LTC2431

REF–

SCK

9

4 IN+

CS 7

5 IN–

FO 10

GND

6

10k

V+

V+

MEASURE STANDBY

0V

CONTROL SIGNAL

V+

C3

0.1µF

4 VIN

VOUT 6

LT1790-1.25

C3

1µF

GND1

GND2

1

2

6915 F07

Figure 7. Bridge Amplifier with Programmable Gain and Analog to Digital Conversion. (Standby Current Less than 100µA)

Related Parts

PART NUMBER

LTC1043

LTC1100

LTC1101

LTC1167

LTC1168

LTC1789-1

LTC2050

LTC2051

LTC2052

LTC2053

LTC6800

DESCRIPTION

COMMENTS

Dual Precision Instrumentation Switched-Capacitor

Building Block

Rail-to-Rail Input, 120dB CMRR

Precision Zero-Drift Instrumentation Amplifier

Fixed Gains of 10 or 100, 10µV Offset, 50pA Input Bias Current

Precision, Micropower, Single Supply Instrumentation Fixed Gain of 10 or 100, IS < 105µA

Amplifier

Single Resistor Gain Programmable, Precision

Instrumentation Amplifier

Single Gains Set Resistor, G = 1 to 10,000 Low Noise: 7.5nV/√Hz

Low Power Single Resistor Gain Programmable,

Precision Instrumentation Amplifiers

IS = 530µA

Single Supply, Rail-to-Rail Output, Micropower

Instrumentation Amplifier

IS = 80µA Max

Zero-Drift Operational Amplifier

SOT-23 Package

Dual Zero-Drift Operational Amplifier

MS8 Package

Quad Zero-Drift Operational Amplifier

GN16 Package

Rail-to-Rail Input and Output, Zero-Drift Instrumentation MS8 Package, 10µV Max VOS, 50nV/°C Max Drift

Amplifier with Resistor-Programmable Gain

Rail-to-Rail Input and Output, Instrumentation Amplifier MS8 Package, 100µV Max VOS, 250nV/°C Max Drift

with Resistor-Programmable Gain

18 Linear Technology Corporation

1630 McCarthy Blvd., Milpitas, CA 95035-7417

(408) 432-1900 ● FAX: (408) 434-0507 ● www.linear.com

6915fb

LT 0611 REV B • PRINTED IN USA

 LINEAR TECHNOLOGY CORPORATION 2004

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