DRV5053_15 Datasheet, PDF (14/24 Pages) Texas Instruments – DRV5053 Analog-Bipolar Hall Effect Sensor

DRV5053
SLIS153B – MAY 2014 – REVISED SEPTEMBER 2014
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9.2.2.2 Detailed Design Procedure
In this example we will add an external RC filter in order to reduce the output bandwidth.
In order to preserve the signal at the frequencies of interest, we will conservatively select a low-pass filter
bandwidth (–3-dB point) at twice the system bandwidth (10 kHz).
1
10 kHz
2p ´ R₁ ´ C₂
(1)
If we guess R1 = 10 kΩ, then C2 < 1590 pF. So we select C2 = 1500 pF.
9.2.2.3 Application Curves
Figure 15. 5-kHz Switching Magnetic Field
0
-2
-4
-6
-8
-10
-12
-14
100 200
500 1000 2000 5000 10000
Frequency (Hz)
R1 = 10-kΩ pullup
C2 = 680 pF
Figure 16. Low-Pass Filtering
100000
D011
10 Power Supply Recommendations
The DRV5053 device is designed to operate from an input voltage supply (VM) range between 2.5 and 38 V. A
0.01-µF (minimum) ceramic capacitor rated for V_CC must be placed as close to the DRV5053 device as possible.
14
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