Datasheet > LT1168AI

LT1168AI

更新时间： 2024-11-12 22:34:19

品牌	Logo	应用领域
凌特 - Linear		仪表放大器
页数	文件大小	规格书
20页	302K
描述
Low Power, Single Resistor Gain Programmable, Micropower Precision Instrumentation Amplifier

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LT1168AI 数据手册

LT1168

Low Power, Single

Resistor Gain Programmable,

Precision Instrumentation Amplifier

FEATURES

DESCRIPTIO

TheLT^®1168isamicropower,precisioninstrumentationam-

■

Supply Current: 530µA 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: 0.3µV/°C Max

Gain Nonlinearity: G = 10, 20ppm Max

Input Offset Voltage: 40µV Max

Input Bias Current: 250pA Max

PSRR at A_V=1: 103dB Min

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(350µAtypicalfor

±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(40µVmax),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.

CMRR at A_V= 1: 90dB Min

Wide Supply Range: ±2.3V to ±18V

1kHz Voltage Noise: 10nV/√Hz

0.1Hz to 10Hz Noise: 0.28µV_P-P

Available in 8-Pin PDIP and SO Packages

APPLICATIO S

■

Bridge Amplifiers

■

Strain Gauge Amplifiers

■

Thermocouple Amplifiers

Differential to Single-Ended Converters

TheLT1168isapin-for-pinimprovedsecondsourceforthe

AD620andINA118.TheLT1168,offeredin8-pinPDIPand

SOpackages,requiressignificantlylessPCboardareathan

discrete op amp resistor designs. These advantages make

the LT1168 the most cost effective solution for precision

instrumentation amplifier applications.

■

Differential Voltage to Current Converters

■

Data Acquisition

■

Battery-Powered and Portable Equipment

■

Medical Instrumentation

Scales

■

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

TYPICAL APPLICATIO

Single Supply* Pressure Monitor

Gain Nonlinearity

BI TECHNOLOGIES

67-8-3 R40KQ, (0.02% RATIO MATCH)

40k

–

3.5k

REF

G = 200

249Ω

LT1168

DIGITAL

ADC

20k

DATA

LTC^®1286

OUTPUT

1/2

AGND

40k

LT1112

–

G = 1000

= 2k

OUT

OUTPUT VOLTAGE (2V/DIV)

1168 TA01a

1168 TA01

= ±10V

*See Theory of Operation section

12 3 4 5 6 7...20

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LT1168CN8#PBF	Linear	获取价格	LT1168 - Low Power, Single Resistor Gain Programmable, Precision Instrumentation Amplifier
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