LTC1921 datasheet(10/16 Pages) AD

10 / 16 page

LT1990-10

Rev 0

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PIN FUNCTIONS

REF: Reference Input. Sets the output level when the dif-

ference between the inputs is zero.

–IN: Inverting Input. Connects a 1MΩ resistor divider

to the op amp’s inverting input. Designed to permit high

voltage operation.

+IN: Noninverting Input. Connects a 1MΩ resistor divider

to the op amp’s noninverting input. Designed to permit

high voltage operation.

V–: Negative Power Supply. Can be either ground (in single

supply applications) or a negative voltage (in split supply

applications).

NC: Not internally connected. May be tied to any pin or

floated.

OUT: Output. VOUT = 10 • (V+IN – V–IN) + VREF.

V+: Positive Power Supply. Can range from 2.7V to 36V

above the V– voltage.

TYPICAL PERFORMANCE CHARACTERISTICS

Large Signal Transient Response

Input Common Mode Voltage

Transient Response

50µs/DIV

1990 G28

VS = ±15V

VREF = GND

NO LOAD

50µs/DIV

1990 G29

VS = ±15V

RL = 10k

VREF = GND

20µs/DIV

1990 G30

–15

–5

–20

–10

LTC1921 Datasheet(PDF) 10 Page - Analog Devices