Low-Cost, Precision, High-Side
Current-Sense Amplifier
MAX4172
____________________________Typical Operating Characteristics (continued)
(V+ = +12V, V
RS+
= 12V, R
OUT
= 1kΩ, T
A
= +25°C, unless otherwise noted.)
POWER-SUPPLY REJECTION RATIO
vs. FREQUENCY
MAX4172-04
ERROR vs. SENSE VOLTAGE
40
35
30
ERROR (%)
ERROR (%)
25
20
15
10
5
0
-5
0.1m
1m
10m
V
SENSE
(V)
100m
1
10
5
0
0.01
25
20
15
35
30
V
SENSE
= 100mV
0.5Vp-p
1.0Vp-p
5mVp-p
0.1
1
10
100
1000
POWER-SUPPLY FREQUENCY (kHz)
OUTPUT ERROR
vs. COMMON-MODE VOLTAGE
MAX4172-06
V+ THRESHOLD FOR PG OUTPUT LOW
vs. TEMPERATURE
2.90
V+ TRIP THRESHOLD (V)
2.85
2.80
2.75
2.70
2.65
2.60
2.55
2.50
2.45
V+ FALLING VOLTAGE
V+ RISING VOLTAGE
MAX4172-07
0.75
0.55
0.35
ERROR (%)
0.15
-0.05
-0.25
-0.45
-0.65
0
6
12
18
V
RS-
(V)
24
30
T
A
= +25°C
T
A
= +85°C
T
A
= -40°C
V
SENSE
= 100mV
2.95
40
-40
-15
10
35
60
85
TEMPERATURE (°C)
0mV to 10mV V
SENSE
TRANSIENT RESPONSE
MAX4172-08
0mV to 100mV V
SENSE
TRANSIENT RESPONSE
MAX4172-09
V
SENSE
5mV/div
GND
V
SENSE
50mV/div
GND
V
OUT
50mV/div
GND
V
OUT
500mV/div
GND
10µs/div
10µs/div
4
_______________________________________________________________________________________
MAX4172-05
MAXIM [ MAXIM INTEGRATED PRODUCTS ]
