P re c is io n , Hig h -S id e
Cu rre n t -S e n s e Am p lifie rs
1/MAX472
____________________________Typ ic a l Op e ra t in g Ch a ra c t e ris t ic s (c o n t in u e d )
(Typical Operating Circuit (MAX471) or circuit of Figure 4, RG1 = RG2 = 200Ω, R
= 2kΩ (MAX472), T = +25°C, unless
OUT
A
otherwise noted.)
MAX472
ERROR vs. SENSE VOLTAGE
25
MAX471
NOISE vs. LOAD CURRENT
0.5
0.4
15
V
-V
RG1 RG2
0.3
5
0
0.2
0.1
-5
V
-V
RG2 RG1
-15
-25
0
1A
10mA
0.1
1
10
100
1000
1mA
100mA
SENSE
I
V
(mV)
SENSE
MAX471
MAX471
-100mA to +100mA TRANSIENT RESPONSE
0mA to 100mA TRANSIENT RESPONSE
LOAD
CURRENT
100mA/div
0A
LOAD
CURRENT
50mA/div
0A
V
OUT
50mV/div
V
OUT
50mV/div
50mA/div
SIGN
50mV/div
100µs/div
100µs/div
V
CC
= 10V, R = 2kΩ 1%, SIGN PULL-UP = 50kΩ 1%
OUT
V
CC
= 10V, R = 2kΩ 1%, SIGN PULL-UP = 50kΩ 1%
OUT
MAX471
MAX471
START-UP DELAY
0A TO 3A TRANSIENT RESPONSE
I
LOAD
1A/div
V
OUT
500mV/div
V
OUT
V
SHDN
10mV/div
5V/div
10µs/div
10µs/div
I
= 1A, R = 2kΩ 1%
R
OUT
= 2kΩ 1%
LOAD
OUT
_______________________________________________________________________________________
5
MAXIM [ MAXIM INTEGRATED PRODUCTS ]
