Datasheet

MAX4172
Low-Cost, Precision, High-Side
Current-Sense Amplifier
2
Maxim Integrated
T
A
= 0°C to +85°C
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(V+ = +3V to +32V; V
RS+
, V
RS-
= 0 to 32V; T
A
= T
MIN
to T
MAX
; unless otherwise noted. Typical values are at V+ = +12V,
V
RS+
= 12V, T
A
= +25°C.)
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.
V+, RS+, RS-, PG ...................................................-0.3V to +36V
OUT ..............................................................-0.3V to (V+ + 0.3V)
Differential Input Voltage, V
RS+
- V
RS-
............................±700mV
Current into Any Pin..........................................................±50mA
Continuous Power Dissipation (T
A
= +70°C)
SO (derate 5.88mW/°C above +70°C)..........................471mW
µMAX (derate 4.10mW/°C above +70°C) .....................330mW
Operating Temperature Range
MAX4172E_A....................................................-40°C to +85°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
Soldering Temperature (reflow) .......................................+260°C
I
OUT
= 0mA
3V ≤ V+ ≤ 32V, V
RS+
> 2.0V
V
SENSE
= 100mV, V+ = 12V,
V
RS+
= 12V
V
SENSE
= 6.25mV, V+ = 12V,
V
RS+
= 12V (Note 1)
V+ = 12V, V
RS+
= 12V
V
RS+
≤ 2.0V
2.0V < V
RS+
< 32V
CONDITIONS
µA/V0.03∆I
OUT
/∆V
RS+
OUT Common-Mode
Rejection Ratio
mA0.8 1.6I
V+
Supply Current
V032V
RS-
V332V+Operating Voltage Range
Input Voltage Range
µA/V0.2∆I
OUT
/∆V+
OUT Power-Supply
Rejection Ratio
±20
µA
±8.0
Low-Level Current Error
±0.1 ±0.75
4
mV150 175Maximum V
SENSE
Voltage
UNITSMIN TYP MAXSYMBOLPARAMETER
V
RS+
> 2.0V, I
OUT
= 0mA
V
RS+
≤ 2.0V, I
OUT
= 0mA
0 27 42.5
µA
-325 +42.5
I
RS+
Positive Input Bias Current
V
RS+
> 2.0V
V
RS+
≤ 2.0V
05085
µA
-650 85
I
RS-
Negative Input Bias Current
MAX4172ESA,
T
A
= -40°C to 0°C
MAX4172ESA
MAX4172ESA
V
OS
Input Offset Voltage mV
MAX4172EUA ±0.2 ±1.6
MAX4172EUA
±15
MAX4172EUA,
T
A
= -40°C to 0°C
±50
MAX4172EUA,
T
A
= 0°C to +85°C
µA
Output Current Error
±15
MAX4172ESA,
T
A
= 0°C to +85°C
±10