TLI4970-D025T4_15 Datasheet, PDF (12/29 Pages) Infineon Technologies AG – High precision miniature coreless magnetic current sensor for AC

TLI4970-D025T4
Functional Description
2.5
Filter Settings
The transfer function of the TLI4970-D025T4 can be influenced by different filter settings. Finally the combination
of a high-pass filter, a prediction filter and a low-pass filter determines the overall transfer function. Figure 2-5
shows the Bode plots for different filter settings. The filter settings can be changed by EEPROM programming.
The manual for EEPROM programming can be found in the TLI4970 programming guide (application note).
Table 2-2 gives an overview about the different filter settings.
Table 2-2 Overview about bandwidth and response time
High-pass filter Prediction filter Low-pass filter Bandwidth
1
1
7
70 Hz
1
1
6
130 Hz
1
1
5
260 Hz
1
1
4
530 Hz
1
1
3
1.1 kHz
1
1
2
2.4 kHz
1
1
1
5.2 kHz
1
1
0
6.9 kHz
0
0
0
10 kHz
0
1
0
18 kHz
1) 90% of final value based on 25 A step function
Response time¹⁾
6.2 ms
3.1 ms
1.6 ms
781 µs
394 µs
201 µs
109 µs
92 µs
70 µs
57 µs
Data Sheet
12
Rev. 1.0, 2015-07-02