Precision, High-Side
Current-Sense Amplifiers
____________________________Typical Operating Characteristics (continued)
(Typical Operating Circuit (MAX471) or circuit of Figure 4, RG1 = RG2 = 200Ω, R
OUT
= 2kΩ (MAX472), T
A
= +25°C, unless
otherwise noted.)
MAX472
ERROR vs. SENSE VOLTAGE
MAX471-10
MAX471/MAX472
MAX471
NOISE vs. LOAD CURRENT
MAX471-15
25
0.5
0.4
IOUT NOISE (µA
RMS
)
15
V
RG1
-V
RG2
ERROR (%)
5
0
-5
V
RG2
-V
RG1
0.3
0.2
-15
0.1
-25
0.1
1
10
V
SENSE
(mV)
100
1000
0
1mA
10mA
100mA
ISENSE
1A
MAX471
0mA to 100mA TRANSIENT RESPONSE
0A
LOAD
CURRENT
50mA/div
MAX471
-100mA to +100mA TRANSIENT RESPONSE
LOAD
CURRENT
100mA/div
0A
V
OUT
50mV/div
V
OUT
50mV/div
50mA/div
100µs/div
V
CC
= 10V, R
OUT
= 2kΩ 1%, SIGN PULL-UP = 50kΩ 1%
SIGN
50mV/div
100µs/div
V
CC
= 10V, R
OUT
= 2kΩ 1%, SIGN PULL-UP = 50kΩ 1%
MAX471
START-UP DELAY
MAX471
0A TO 3A TRANSIENT RESPONSE
I
LOAD
1A/div
V
OUT
500mV/div
V
SHDN
5V/div
V
OUT
10mV/div
10µs/div
I
LOAD
= 1A, R
OUT
= 2kΩ 1%
R
OUT
= 2kΩ 1%
10µs/div
_______________________________________________________________________________________
5
MAXIM [ MAXIM INTEGRATED PRODUCTS ]
