LT1991 TYPICAL PERFORMANCE CHARACTERISTICSSmall Signal Transient ResponseSmall Signal Transient ResponseSmall Signal Transient Response GAIN = 1 GAIN = 3 GAIN = 9 50mV/DIV 50mV/DIV 50mV/DIV 5µs/DIV 1991 G18 5µs/DIV 1991 G19 5µs/DIV 1991 G20 PIN FUNCTIONS (Difference Amplifier Configuration) P1 (Pin 1): Noninverting Gain-of-1 input. Connects a 450k OUT (Pin 6): Output. VOUT = VREF + 1 • (VP1 – VM1) + 3 • internal resistor to the op amp’s noninverting input. (VP3 – VM3) + 9 • (VP9 – VM9). P3 (Pin 2): Noninverting Gain-of-3 input. Connects a 150k VCC (Pin 7): Positive Power Supply. Can be anything from internal resistor to the op amp’s noninverting input. 2.7V to 36V above the VEE voltage. P9 (Pin 3): Noninverting Gain-of-9 input. Connects a 50k M9 (Pin 8): Inverting Gain-of-9 input. Connects a 50k internal resistor to the op amp’s noninverting input. internal resistor to the op amp’s inverting input. VEE (Pin 4): Negative Power Supply. Can be either ground M3 (Pin 9): Inverting Gain-of-3 input. Connects a 150k (in single supply applications), or a negative voltage (in internal resistor to the op amp’s inverting input. split supply applications). M1 (Pin 10): Inverting Gain-of-1 input. Connects a 450k REF (Pin 5): Reference Input. Sets the output level when internal resistor to the op amp’s inverting input. difference between inputs is zero. Connects a 450k internal Exposed Pad: Must be soldered to PCB. resistor to the op amp’s noninverting input. BLOCK DIAGRAM M1 M3 M9 VCC OUT 10 9 8 7 6 50k 450k 150k 4pF 450k INM OUT 450k INP LT1991 150k 50k 450k 4pF 1 2 3 4 5 1991 BD P1 P3 P9 VEE REF 1991fh 9 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Applications Information Typical Applications Package Description Revision History Typical Application Related Parts
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