Rainbow Electronics MAX9937 User Manual
Page 2
MAX9937
Automotive Current-Sense Amplifier
with Reverse-Battery Protection
2
_______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(V
CC
= 5V, V
BAT
= V
RS+
= 12V, V
SENSE
= (V
RS+
- V
RS-
) = 0, R
RSP
= R
RSN
= 500
Ω, R
OUT
= 10k
Ω, T
A
= -40°C to +125°C. Typical
values are at T
A
= +25°C, unless otherwise noted. See the
Typical Application Circuit.) (Note 2)
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
RSP, RSN to GND Voltage Continuous ..................-0.3V to +30V
RSP, RSN to GND Load-Dump Voltage Duration
(V
BAT
= 40V) with
Typical Application Circuit .......................1s
RSP, RSN to GND Reverse-Battery Voltage Duration
(V
BAT
= -20V) with
Typical Application Circuit........Continuous
Differential Input Voltage (RSP - RSN)................................±0.3V
V
CC
to GND ...........................................................-0.3V to +6.0V
OUT to GND ...............................................-0.3V to (V
CC
+ 0.3V)
Output Short Circuit to Ground ..................................Continuous
Continuous Input Current into RSN, RSP* ........................±50mA
Continuous Input Current into OUT*.................................±25mA
Thermal Limits (Note 1)
5 SC70 Multiple-Layer PCB
Continuous Power Dissipation (T
A
= +70°C)
(derate 3.1mW/°C above +70°C) ............................246.9mW
θ
JA
...............................................................................324°C/W
θ
JC
...............................................................................115°C/W
Operating Temperature Range .........................-40°C to +125°C
Junction Temperature ......................................................+150°C
Lead Temperature (soldering, 10s) .................................+300°C
Lead Temperature (reflow) ..............................................+260°C
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
DC CHARACTERISTICS
Input Common-Mode Voltage
Range
V
RSP
,
V
RSN
Inferred from CMRR test
4
28
V
Supply Voltage Range
V
CC
Inferred from PSRR test
2.7
5.5
V
T
A
= +25°C
±0.3
±1.2
Input Offset Voltage (Note 3)
V
OS
T
A
= -40°C to +125°C
±1.6
mV
T
A
= +25°C
100
120
Common-Mode Rejection Ratio
CMRR
V
BAT
= +4V to +28V
T
A
= +125°C
90
dB
Power-Supply Rejection Ratio
PSRR
V
CC
= +2.7V to +5.5V
90
120
dB
Quiescent Supply Current
I
CC
V
CC
= 5V
20
55
µA
T
A
= +25°C
0.8
2
5.6
Input Bias Current (Note 4)
I
B+
, I
B-
T
A
= -40°C to +125°C
0.65
6.5
µA
T
A
= +25°C
±1
±12
%
Input Bias Current Mismatch
ΔI
B
/ I
B
2 x (I
B+
- I
B-
)/(I
B+
+I
B-
)
T
A
= -40°C to
+125°C
±15
%
T
A
= +25°C, V
CC
= 0
0.01
1
Input Current in Shutdown
I
RSP
+ I
RSN
T
A
= -40°C to +125°C, V
CC
= 0
10
µA
Voltage Gain
Gain = R
OUT
/R
RSP
20
V/V
T
A
= +25°C
±0.2
±1.5
Voltage Gain Error (Notes 3, 5)
T
A
= -40°C to +125°C
±2.0
%
Note 1: Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a 4-layer
*
Junction temperature rating due to power dissipation must also be observed.