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® INA120
Precision INSTRUMENTATION AMPLIFIER
FEATURES
q LOW OFFSET VOLTAGE: 25µV max q LOW OFFSET VOLTAGE DRIFT:
0.25µV/°C max q PIN-STRAPPED GAINS: 1, 10, 100, 1000 q LOW GAIN DRIFT: 30ppm/°C max
at G = 100 q HIGH COMMON-MODE REJECTION:
106dB at 60Hz, G = 100
APPLICATIONS
q BRIDGE AMPLIFIER q THERMOCOUPLE AMPLIFIER q RTD SENSOR AMPLIFIER q MEDICAL INSTRUMENTATION q DATA ACQUISITION SYSTEM q SWITCHED-GAIN AMPLIFIER
Gain Sense 1 4 3 –In
Gain Set 1 5
2kΩ
RC 8
44Ω
X1000 9 400Ω
X100 10
2kΩ
X10 11
1kΩ 1kΩ
1kΩ 1kΩ
DESCRIPTION
The INA120 is a precision instrumentation amplifier ideal for accurate signal acquisition. It combines precision, protected-input operational amplifiers, lasertrimmed gain-setting resistors, and a high commonmode rejection difference amplifier on a single chip.
Simple pin-strapped connections set precise gains of 1, 10, 100 or 1000. External resistors can be used to set any gain from one to 5000. Gains can be digitally selected with a.