MAX4172 Maxim, MAX4172 Datasheet - Page 4

• Manufacturer Part Number: MAX4172
• Description: The MAX4172 is a low-cost, precision, high-side current-sense amplifier for portable PCs, telephones, and other systems where battery/DC power-line monitoring is critical
• Manufacturer: Maxim

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