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LT1168 Datasheet(PDF) 1 Page - Linear Technology

Part No. LT1168
Description  Low Power, Single Resistor Gain Programmable, Precision Instrumentation Amplifier
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LT1168 Datasheet(HTML) 1 Page - Linear Technology

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1
LT1168
1168fa
Low Power, Single
Resistor Gain Programmable,
Precision Instrumentation Amplifier
TheLT
®1168isamicropower,precisioninstrumentationam-
plifier that requires only one external resistor to set gains of
1 to 10,000. The low voltage noise of 10nV/
√Hz (at 1kHz) is
notcompromisedbylowpowerdissipation(350
µAtypicalfor
±15Vsupplies).Thewidesupplyrangeof±2.3Vto±18Vallows
the LT1168 to fit into a wide variety of industrial as well as
battery-powered applications.
ThehighaccuracyoftheLT1168isduetoa20ppmmaximum
nonlinearityand0.4%maxgainerror(G=10).Previousmono-
lithic instrumentation amps cannot handle a 2k load resistor
whereas the nonlinearity of the LT1168 is specified for loads
as low as 2k. The LT1168 is laser trimmed for very low input
offsetvoltage(40
µVmax),drift(0.3µV/°C),highCMRR(90dB,
G = 1) and PSRR (103dB, G = 1). Low input bias currents of
250pA max are achieved with the use of superbeta process-
ing. The output can handle capacitive loads up to 1000pF in
any gain configuration while the inputs are ESD protected up
to 13kV (human body). The LT1168 with two external 5k
resistors passes the IEC 1000-4-2 level 4 specification.
The LT1168 is a pin-for-pin improved second source for the
AD620 and INA118. The LT1168, offered in 8-pin PDIP and
SO packages, requires significantly less PC board area than
discrete op amp resistor designs. These advantages make
the LT1168 the most cost effective solution for precision
instrumentation amplifier applications.
Supply Current: 530
µA Max
Meets IEC 1000-4-2 Level 4 (
±15kV) ESD Tests
with Two External 5k Resistors
Single Gain Set Resistor: G = 1 to 10,000
Gain Error: G = 10, 0.4% Max
Input Offset Voltage Drift: 0.3
µV/°C Max
Gain Nonlinearity: G = 10, 20ppm Max
Input Offset Voltage: 40
µV Max
Input Bias Current: 250pA Max
PSRR at AV =1: 103dB Min
CMRR at AV = 1: 90dB Min
Wide Supply Range:
±2.3V to ±18V
1kHz Voltage Noise: 10nV/
√Hz
0.1Hz to 10Hz Noise: 0.28
µVP-P
Available in 8-Pin PDIP and SO Packages
Bridge Amplifiers
Strain Gauge Amplifiers
Thermocouple Amplifiers
Differential to Single-Ended Converters
Differential Voltage to Current Converters
Data Acquisition
Battery-Powered and Portable Equipment
Medical Instrumentation
Scales
Single Supply* Pressure Monitor
G = 1000
OUTPUT VOLTAGE (2V/DIV)
1168 TA01a
RL = 2k
VOUT = ±10V
Gain Nonlinearity
*See Theory of Operation section
FEATURES
DESCRIPTIO
APPLICATIO S
TYPICAL APPLICATIO
+
2
3
2
1
1
1
1/2
LT1112
3.5k
5V
3.5k
3.5k
3.5k
8
7
6
1168 TA01
5
40k
20k
40k
DIGITAL
DATA
OUTPUT
4
R1
G = 200
249
3
REF
IN
AGND
ADC
LTC
®1286
BI TECHNOLOGIES
67-8-3 R40KQ, (0.02% RATIO MATCH)
+
LT1168
, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.


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