DRV421_16 Datasheet, PDF (8/44 Pages) Texas Instruments – Integrated Magnetic Fluxgate Sensor for Closed-Loop Current Sensing

DRV421
SBOS704B – MAY 2015 – REVISED MARCH 2016
Typical Characteristics (continued)
at V_DD = 5 V and T_A = +25°C (unless otherwise noted)
60
50
40
30
20
10
0
Saturation Trip Level (mT)
D007
Figure 7. Fluxgate Sensor Saturation (ER Pin) Trip Level
Histogram
50
40
30
20
10
0
-40 -25 -10 5 20 35 50 65 80 95 110 125
Temperature (°C)
D009
Figure 9. Fluxgate Sensor Front-End DC Open-Loop Gain vs
Temperature
5
4
3
2
1
0
-250 -225 -200 -175 -150 -125 -100 -75
Negative Peak Current (mA)
V_DD = 5 V
V_DD = 3.3 V
-50 -25
0
D011
Figure 11. Voltage Swing at ICOMPx Pins vs
Negative Peak Current
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60
50
40
30
20
10
0
DC Open-Loop Gain (V/PT)
D008
Figure 8. Fluxgate Sensor Front-End DC Open-Loop Gain
Histogram
160
GSEL[1:0]=00
GSEL[1:0]=01
140
GSEL[1:0]=10
GSEL[1:0]=11
120
100
80
60
40
0.001
0.01
0.1
1
10
100
Frequency (kHz)
D010
Figure 10. Fluxgate Sensor Front-End AC Open-Loop Gain
vs Frequency
0
V_DD = 5 V
V_DD = 3.3 V
-1
-2
-3
-4
-5
0 25 50 75 100 125 150 175 200 225 250
Positive Peak Current (mA)
D012
Figure 12. Voltage Swing at ICOMPx Pins vs
Positive Peak Current
8
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