Datasheet

MAX9918/MAX9919/MAX9920
-20V to +75V Input Range, Precision
Uni-/Bidirectional, Current-Sense Amplifiers
5
Maxim Integrated
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)
PARAMETERS SYMBOL CONDITIONS MIN TYP MAX UNITS
MAX9918, MAX9919_
0V ≤ V
REFIN
≤ (V
CC
- 1.9V)
82 103
REFIN Common-Mode Rejection
Ratio
RE FIN
C M R R
MAX9920
0V ≤ V
REFIN
≤ (V
CC
- 2.4V)
75 90
dB
M AX 9918, M AX 9919_, V
RS +
= V
RS -
= ± 50m V ±100
REFIN Current I
REFIN
MAX9920, V
RS+
= V
RS-
= ±200mV ±100
μA
SHDN Logic-High V
IH
2.0 V
SHDN Logic-Low V
IL
0.8 V
SHDN Logic Input Current 0 ≤ V
SHDN
≤ V
CC
5μA
Supply Voltage Range V
CC
Inferred from PSRR test 4.5 5.5 V
MAX9918, MAX9919_ 4.5V ≤ V
CC
≤ 5.5V 74 103
Power-Supply Rejection Ratio
(Note 3)
PSRR
MAX9920 4.5V ≤ V
CC
≤ 5.5V 68 100
dB
T
A
= +25°C 0.7 1.2
V
RS+
= V
RS-
= +14V
T
A
= - 40°C to + 125°C 1.5
T
A
= +25°C 1.0 1.6
Supply Current I
CC
V
RS+
= V
RS-
= -2V
T
A
= - 40°C to + 125°C 2.2
mA
Shutdown Supply Current I
CC_SHDN
V
SHDN
= V
CC
= 5V 0.5 10 μA
MAX9918, V
SENSE
= 50mV 75
MAX9919F, V
SENSE
= 50mV 250
MAX9919N, V
SENSE
= 50mV 120
Small Signal -3dB Bandwidth BW
MAX9920, V
SENSE
= 200mV 230
kHz
MAX9918 0.6
MAX9919F 0.9
MAX9919N 3.0
Slew Rate SR
MAX9920 1.5
V/μs
V
SENSE
= 5mV to 50mV step 12
MAX9918
V
SENSE
= 50mV to 5mV step 7
V
SENSE
= 5mV to 50mV step 3.5
MAX9919F
V
SENSE
= 50mV to 5mV step 2.5
V
SENSE
= 5mV to 50mV step 3.5
MAX9919N
V
SENSE
= 50mV to 5mV step 3
V
S E N S E
= 20m V to 200m V step 5
1% Settling Time from V
SENSE
Step
MAX9920
V
S E N S E
= 200m V to 20m V step 3
μs