Rainbow Electronics MAX9920 - Manual (Page 16)

MAX9918/MAX9919/MAX9920
-20V to +75V Input Range, Precision
Uni-/Bidirectional, Current-Sense Amplifiers
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A
INPUT
INPUT STAGE/
LEVEL SHIFTER
FIXED GAIN
G = 45V/V OR 90V/V
V CC
RS+
RS-
FB
OUT
REFIN
R2
R1
GND SHDN
MAX9919F
I LOAD
50mV (typ) R SENSE
A
INPUT
INPUT STAGE/
LEVEL SHIFTER
ADJUSTABLE GAIN
V CC
RS+
RS-
FB
OUT
REFIN
R2
R1
GND SHDN
MAX9918
MAX9920
I LOAD
MAX9918
50mV (typ)
MAX9920
200mV (typ)
R SENSE
GAIN IS SET BY EXTERNAL RESISTORS, R1 AND R2
G = [1+(R2/R1)] FOR MAX9918
G = [1+(R2/R1)]/4 FOR MAX9920
Functional Diagram
Chip Information
PROCESS: BiCMOS