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AMC131M01DFMR 数据表(PDF) 26 Page - Texas Instruments

部件名 AMC131M01DFMR
功能描述  AMC131M01 1-Channel, 64-kSPS, Simultaneous-Sampling, 24-Bit, Reinforced Isolated Delta-Sigma ADC With Integrated DC/DC Converter
PDF  81 Pages
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制造商  TI [Texas Instruments]
网页  http://www.ti.com
标志 TI - Texas Instruments

AMC131M01DFMR 数据表(HTML) 26 Page - Texas Instruments

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Equation 7 calculates the transfer function of a sinc3 filter in terms of the continuous-time frequency parameter f.
½H(f) =
½
3
sin
N f
p
f
MOD
N
sin
´
pf
f
MOD
(7)
where:
• N is the OSR
Figure 8-7 and Figure 8-8 show the digital filter response of the fast-settling filter and the sinc3 filter for OSRs of
1024 and lower. Figure 8-9 and Figure 8-10 show the digital filter response of the sinc3 + sinc1 filter for an OSR
of 4096.
Frequency (fIN/fDATA)
0
1
2
3
4
5
-140
-120
-100
-80
-60
-40
-20
0
Fast-settling filter
Sinc3 filter
Figure 8-7. Fast-Settling and Sinc3 Digital Filter
Response
Frequency (fIN/fDATA)
0
0.1
0.2
0.3
0.4
0.5
-12
-10.5
-9
-7.5
-6
-4.5
-3
-1.5
0
Fast-settling filter
Sinc3 filter
Figure 8-8. Fast-Settling and Sinc3 Digital Filter
Response, Pass-Band Detail
Frequency (fIN/fDATA)
0
1
2
3
4
5
6
7
8
9
10
11
12
-140
-120
-100
-80
-60
-40
-20
0
Sinc3 filter (1024)
Sinc3 + Sinc1 filter
Figure 8-9. Digital Filter Response for OSR = 4096
as a Combination of Sinc3 + Sinc1
Frequency (fIN/fDATA)
0
0.1
0.2
0.3
0.4
0.5
-12
-10
-8
-6
-4
-2
0
Sinc3 filter (1024)
Sinc3 + Sinc1 filter
Figure 8-10. Sinc3 + Sinc1 Digital Filter Response
at OSR = 4096, Pass-Band Detail
8.3.12 Calibration Registers
The calibration registers allow for automatic computation of calibrated ADC conversion results from
preprogrammed values. The host can rely on the device to automatically correct for system gain and offset after
the error correction terms are programmed into the corresponding device registers. The measured calibration
coefficients must be stored in external nonvolatile memory and programmed into the registers each time the
AMC131M01 powers up because the AMC131M01 registers are volatile.
AMC131M01
SBASA57 – SEPTEMBER 2023
www.ti.com
26
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Copyright © 2023 Texas Instruments Incorporated
Product Folder Links: AMC131M01



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