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LT1168 Folha de dados(PDF) 1 Page - Linear Technology |
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LT1168 Folha de dados(HTML) 1 Page - Linear Technology |
1 / 20 page 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 Ω 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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Descrição semelhante - LT1168_06 |
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