Rainbow Electronics MAX9920 - Manual (Page 3)

MAX9918/MAX9919/MAX9920
-20V to +75V Input Range, Precision
Uni-/Bidirectional, Current-Sense Amplifiers
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PARAMETERS SYMBOL CONDITIONS MIN TYP MAX UNITS
V RS+ = V RS- = +14V ±1.2
MAX9918
V RS+ = V RS- = -2V ±3.3
V RS+ = V RS- = +14V ±1.8
MAX9919_
V RS+ = V RS- = -2V ±1.8
V RS+ = V RS- = +14V ±2.4
Input Offset Voltage Drift
(Note 3)
V OSD
MAX9920
V RS+ = V RS- = -2V ±8.8
μV/°C
Common-Mode Range V
CM
Inferred from CMRR tests -20 +75 V
-2V ≤ V
CM
≤ +14V 80
M AX 9918, M AX 9919
-20V ≤ V
CM
≤ +75V 96
-2V ≤ V
CM
≤ +14V 72
Common-Mode Rejection Ratio
(Note 3)
CMRR
MAX9920
-20V ≤ V
CM
≤ +75V 86
dB
T A = +25°C ±175
Input Bias Current I RS+ , I RS- -20V ≤ V
CM
≤ +75V
T A = -40°C to +125°C ±250
μA
Input Offset Current ( I RS + - I RS - ) 0 ±8 μA
Input Leakage Current in
Shutdown
-20V ≤ V
CM
≤ +75V, V
SHDN = V CC = 5V ±30 μA
Input Leakage Current V RS+ = V RS- = +14V, +75V, V CC = 0V ±30 μA
Common mode 300 k Ω
MAX9918,
MAX9919_
Differential 715 Ω
Common mode 330 k Ω
Input Resistance
MAX9920
Differential 224 Ω
MAX9918, MAX9919_ 50
Full-Scale Sense Voltage (Note 4) V SENSE
Inferred from gain
error test
MAX9920 200
mV
MAX9918, MAX9920 Adj
MAX9919F 45 Gain (Notes 2, 4) G
MAX9919N 90
V/V
MAX9918 30
Minimum Adjustable Gain G ADJ
MAX9920 7.5
V/V
ELECTRICAL CHARACTERISTICS (continued)
(V CC = 5V, V RS+ = V RS- = +14V, V SENSE = (V RS+ - V RS- ) = 0V, V SHDN = V GND = 0V, V REFIN = V CC /2, R L = 100kΩ; for MAX9918, A V =
90V/V, R2/R1 = 89kΩ/1kΩ; for MAX9920, A V = 20V/V, R2/R1 = 79kΩ/1kΩ; T A = -40°C to +125°C, unless otherwise noted. Typical val-
ues are at T A = +25°C.) (Note 1)