DRV421_16 Datasheet, PDF (11/44 Pages) Texas Instruments – Integrated Magnetic Fluxgate Sensor for Closed-Loop Current Sensing

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Typical Characteristics (continued)
at V_DD = 5 V and T_A = +25°C (unless otherwise noted)
50
40
30
20
10
0
D025
AINN Input Impedance (k:)
Figure 25. Shunt Sense Amplifier AINN Input Impedance
Histogram
100
80
60
40
20
0
D027
Gain Error (%)
Figure 27. Shunt Sense Amplifier Gain Error Histogram
20
15
10
5
0
0.01
0.1
1
10
100
1000 10000
Input Signal Frequency (kHz)
D029
Figure 29. Shunt Sense Amplifier Gain vs
Frequency
DRV421
SBOS704B – MAY 2015 – REVISED MARCH 2016
11
10.8
10.6
10.4
10.2
10
9.8
9.6
9.4
9.2
9
-40 -25 -10 5 20 35 50 65 80 95 110 125
Temperature (°C)
D026
Figure 26. Shunt Sense Amplifier AINN Input Impedance vs
Temperature
0.3
0.25
0.2
0.15
0.1
0.05
0
-0.05
-0.1
-0.15
-0.2
-0.25
-0.3
-40 -25 -10 5 20 35 50 65 80 95 110 125
Temperature (°C)
D028
Figure 28. Shunt Sense Amplifier Gain Error vs Temperature
40
35
30
25
20
15
10
5
0
3
3.5
4
4.5
5
5.5
Supply Voltage (V)
D030
Figure 30. Shunt Sense Amplifier Linearity vs
Supply Voltage
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