器件名称: OP297_03
功能描述: Dual Low Bias Current Precision Operational Amplifier
文件大小: 266.84KB 共12页
简 介:Dual Low Bias Current Precision Operational Amplifier OP297
FEATURES Low Offset Voltage: 50 V Max Low Offset Voltage Drift: 0.6 V/C Max Very Low Bias Current: 100 pA Max Very High Open-Loop Gain: 2000 V/mV Min Low Supply Current (Per Amplifier): 625 A Max Operates From 2 V to 20 V Supplies High Common-Mode Rejection: 120 dB Min Pin Compatible to LT1013, AD706, AD708, OP221, LM158, and MC1458/1558 with Improved Performance APPLICATIONS Strain Gage and Bridge Amplifiers High Stability Thermocouple Amplifiers Instrumentation Amplifiers Photo-Current Monitors High Gain Linearity Amplifiers Long-Term Integrators/Filters Sample-and-Hold Amplifiers Peak Detectors Logarithmic Amplifiers Battery-Powered Systems PIN CONNECTIONS
OUTA 1 –INA 2 +INA 3 V– 4 A B
8 7 6 5
V+ OUTB –INB +INB
Precision performance of the OP297 includes very low offset, under 50 V, and low drift, below 0.6 V/°C. Open-loop gain exceeds 2000 V/mV, ensuring high linearity in every application. Errors due to common-mode signals are eliminated by the OP297’s common-mode rejection of over 120 dB, which minimizes offset voltage changes experienced in battery-powered systems. Supply current of the OP297 is under 625 A per amplifier, and the part can operate with supply voltages as low as ± 2 V. The OP297 uses a super-beta input stage with bias current cancellation to maintain picoamp bias currents at all temperatures. This is in contrast to FET input op amps whose bias currents start in the picoamp range at 25°C, but d……
