Datasheet

MAX9938
1µA, 4-Bump UCSP/SOT23,
Precision Current-Sense Amplifier
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(V
RS+
= V
RS-
= 3.6V, V
SENSE
= (V
RS+
- V
RS-
) = 0V, T
A
= -40°C to +85°C, unless otherwise noted. Typical values are at T
A
= +25°C.) (Note 1)
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.
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
V
RS+
= 5V, T
A
= +25°C 0.5 0.85
V
RS+
= 5V, -40°C < T
A
< +85°C 1.1
V
RS+
= 28V, T
A
= +25°C 1.1 1.8
Supply Current (Note 2) I
CC
V
RS+
= 28V, -40°C < T
A
< +85°C 2.5
μA
Common-Mode Input Range V
CM
Guaranteed by CMRR , -40°C < T
A
< +85°C 1.6 28 V
Common-Mode Rejection Ratio CMRR 1.6V < V
RS+
< 28V, -40°C < T
A
< +85°C 94 130 dB
T
A
= +25°C ±100 ±500
Input Offset Voltage (Note 3) V
OS
-40°C < T
A
< +85°C ±600
μV
MAX9938T 25
MAX9938F 50
MAX9938H 100
Gain G
MAX9938W 200
V/V
T
A
= +25°C ±0.1 ±0.5
M AX 9938T/M AX 9938F/
MAX9938H
- 40°C < T
A
< + 85°C ±0.6
T
A
= +25°C ±0.1 ±0.7
Gain Error (Note 4) GE
MAX9938W
- 40°C < T
A
< + 85°C ±0.8
%
MAX9938T/F/H 7.0 10 13.2
Output Resistance R
OUT
(Note 5)
MAX9938W 14.0 20 26.4
kΩ
Gain = 25 1.5 15
Gain = 50 3 30
Gain = 100 6 60
OUT Low Voltage V
OL
Gain = 200 12 120
mV
OUT High Voltage V
OH
V
OH
= V
RS-
- V
OUT
(Note 6) 0.1 0.2 V
V
SENSE
= 50mV, gain = 25 125
V
SENSE
= 50mV, gain = 50 60
V
SENSE
= 50mV, gain = 100 30
Small-Signal Bandwidth
(Note 5)
BW
V
SENSE
= 50mV, gain = 200 15
kHz
Output Settling Time t
S
1% final value, V
SENSE
= 50mV 100 μs
RS+, RS- to GND....................................................-0.3V to +30V
OUT to GND .............................................................-0.3V to +6V
RS+ to RS- ...........................................................................±30V
Short-Circuit Duration: OUT to GND ..........................Continuous
Continuous Input Current (Any Pin)..................................±20mA
Continuous Power Dissipation (T
A
= +70°C)
4-Bump UCSP (derate 3.0mW/°C above +70°C).........238mW
5-Pin SOT23 (derate 3.9mW/°C above +70°C)............312mW
6-Pin μDFN (derate 4.5mW/°C above +70°C) .............358mW
Operating Temperature Range ...........................-40°C to +85°C
Junction Temperature......................................................+150°C
Storage Temperature Range ............................-65°C to +150°C
Lead Temperature (excluding UCSP, soldering, 10s).....+300°C
Soldering Temperature (reflow) .......................................+260°C