MAX471 Ver la hoja de datos (PDF) - Maxim Integrated
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MAX471 Datasheet PDF : 12 Pages
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Precision, High-Side
Current-Sense Amplifiers
__________________________________________Typical Operating Characteristics
(Typical Operating Circuit (MAX471) or circuit of Figure 4, RG1 = RG2 = 200Ω, ROUT = 2kΩ (MAX472), TA = +25°C, unless
otherwise noted.)
SUPPLY CURRENT vs.
SUPPLY VOLTAGE
65
60
TA = +85°C
55
TA = +25°C
50
45
TA = -40°C
40
SHUTDOWN CURRENT vs.
SUPPLY VOLTAGE
2.5
TA = -40°C
2.0
1.5
TA = +25°C
1.0
TA = +85°C
0.5
SIGN THRESHOLD vs.
SUPPLY VOLTAGE
4
TA = -40°C
3
2
1
TA = +25°C
0
TA = +85°C
-1
35
3 6 9 12 15 18 21 24 27 30 33 36
VRS+ (V)
MAX471
NO-LOAD OFFSET CURRENT vs.
SUPPLY VOLTAGE
2.4
VS+ = VS-
2.2
TA = -40°C
2.0
1.8
1.6
TA = +85°C
1.4
1.2
TA = +25°C
1.0
0.8
0.6
3
40
6 9 12 15 18 21 24 27 30 33 36
VRS+ (V)
MAX471
RS+ TO RS- RESISTANCE vs.
TEMPERATURE
38
36
0
3 6 9 12 15 18 21 24 27 30 33 36
VRS+(V)
MAX471
ERROR vs. LOAD CURRENT
15
12
ILOAD FROM RS- TO RS+
9
6
3
0
-3
-6
-9
ILOAD FROM RS+ TO RS-
-12
-15
0.01
0.10
1
10
ILOAD (A)
MAX472
NO-LOAD OUTPUT ERROR vs.
SUPPLY VOLTAGE
3.0
RG1 = RG2 = 0Ω
2.5
TA = +85°C
2.0
-2
3 6 9 12 15 18 21 24 27 30 33 36
VRS+ (V)
MAX471
POWER-SUPPLY REJECTION RATIO
vs. FREQUENCY
40
ILOAD = 1A
35
RS+ RS–
30
OUT
V = 0V TO 0.5V
GND
A
25
5V
1µF
V = 0V TO 1V
20
V 5Ω
15
V = 0mV TO 50mV
10
5
0
0.01 0.10 1
10 100 1000
POWER-SUPPLY FREQUENCY (kHz)
MAX472
ERROR vs. SUPPLY VOLTAGE
1.10
VRG1-VRG2 = 60mV,
RG1 = RG2 = 200Ω
1.00
TA = +85°C
34
32
30
28
-40 -20 0
20 40 60 80
TEMPERATURE (°C)
1.5
TA = +25°C
1.0
TA = -40°C
0.5
0
3 6 9 12 15 18 21 24 27 30 33 36
VCC (V)
0.90
TA = +25°C
0.80
TA = -40°C
0.70
3 6 9 12 15 18 21 24 27 30 33 36
VCC (V)
4 _______________________________________________________________________________________
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