DRV421_15 Datasheet, PDF (10/44 Pages) Texas Instruments – DRV421 Integrated Magnetic Fluxgate Sensor for Closed-Loop Current Sensing

DRV421
SBOS704A – MAY 2015 – REVISED JULY 2015
Typical Characteristics (continued)
at V_DD = 5 V and T_A = +25°C (unless otherwise noted)
50
40
30
20
10
0
Common-Mode Rejection Ratio (2V/V)
D019
Figure 19. Shunt Sense Amplifier Common-Mode Rejection
Ratio Histogram
70
60
50
40
30
20
10
0
Power-Supply Rejection Ratio (2V/V)
D0021
Figure 21. Shunt Sense Amplifier Power-Supply Rejection
Ratio Histogram
100
80
60
40
20
0
AINP Input Impedance (k:)
D023
Figure 23. Shunt Sense Amplifier AINP Input Impedance
Histogram
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100
80
60
40
20
0
0.01
0.1
1
10
100
Input Signal Frequency (kHz)
1000
D020
Figure 20. Shunt Sense Amplifier Common-Mode Rejection
Ratio vs Input Signal Frequency
100
80
60
40
20
0
0.01
0.1
1
10
100
Ripple Frequency (kHz)
1000
D022
Figure 22. Shunt Sense Amplifier Power-Supply Rejection
Ratio vs Ripple Frequency
51
50.8
50.6
50.4
50.2
50
49.8
49.6
49.4
49.2
49
-40 -25 -10 5 20 35 50 65 80 95 110 125
Temperature (°C)
D024
Figure 24. Shunt Sense Amplifier AINP Input Impedance vs
Temperature
10
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