DRV401-Q1 Datasheet, PDF (11/39 Pages) Texas Instruments – DRV401-Q1 Sensor Signal Conditioning Device for Closed-Loop Magnetic Current Sensor

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DRV401-Q1
SBOS814 – DECEMBER 2016
Typical Characteristics (continued)
at T_A = 25°C and V_DD1 = V_DD2 = 5 V with external 100-kHz filter bandwidth, (unless otherwise noted)
50.250
70
50.125
50.000
49.875
60
50
40
Pin Gain = High
30
Pin Gain = Low
49.750
49.625
-50 -25 0
25 50 75
Temperature (°C)
100 125 150
20
10
0
100
1k
10 k
Frequency (Hz)
100 k
Figure 19. Differential Amplifier: REF_IN Resistance vs
Temperature
2000
1500
1000
500
0
-500
At 250 kHz, 5.0 V
-1000
-1500
At 400 kHz, 5.0 V
-2000
-50 -25 0
25 50 75
Temperature (°C)
100 125 150
Figure 20. Compensation Loop: Small-Signal Gain
V_ICOMP1 - V_ICOMP2 = 4.2 V
I_LOAD = 210 mA
Gain Pin Low
Gain (ppm/V)
Figure 21. Compensation Loop: Duty Cycle Error vs
Temperature
5.00
4.75
125°C 25°C -50°C
4.50
4.25
4.00
1.00
0.75
0.50
125°C 25°C -50°C
0.25
0
0
50
100
150
200
250
300
Output Current (mA)
Figure 22. Compensation Loop: DC Gain: Duty Cycle Error
Change
35.0
32.5
30.0
27.5
25.0
-50 -25 0
25 50 75
Temperature (°C)
100 125 150
Figure 23. I_COMP Output Swing to Rail vs Output Current
Figure 24. Probe Comparator Threshold Current vs
Temperature
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