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PCM5121 数据表(PDF) 21 Page - Texas Instruments

部件名 PCM5121
功能描述  PCM512x 2-VRMS DirectPath™, 112-dB and 106-dB Audio Stereo DACs With 32-Bit, 384-kHz PCM Interface
PDF  121 Pages
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制造商  TI2 [Texas Instruments]
网页  https://www.ti.com
标志 TI2 - Texas Instruments

PCM5121 数据表(HTML) 21 Page - Texas Instruments

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PCM5121, PCM5122
www.ti.com
SLAS763C – AUGUST 2012 – REVISED OCTOBER 2018
Product Folder Links: PCM5121 PCM5122
Submit Documentation Feedback
Copyright © 2012–2018, Texas Instruments Incorporated
(1)
At fs=44.1 kHz, de-emphasis filter is supported.
8.3.4.2 Interpolation Filter
The PCM512x provides 4 types of interpolation filters, selectable by writing to Page 0, Register 43, D(4:0).
Table 7. ROM Preset Programs
PROGRAM
NUMBER
D(4:0)
DESCRIPTION
MINIMUM CYCLES
0
0 0000
Reserved
1
0 0001
Normal x8/x4/x2/x1 Interpolation Filter(1)
256
2
0 0010
Low Latency x8/x4/x2/x1 Interpolation Filter(1)
256
3
0 0011
High Attenuation x8/x4/x2 Interpolation Filter (1)
512
4
0 0100
Reserved
5
0 0101
Preset Process Flow
6
0 0110
Reserved
7
0 0111
Asymmetric FIR Interpolation Filter(1)
512
:
:
Reserved
31
1 1111
Reserved
The PCM512x supports four sampling modes (single rate, dual rate, quad rate, and octal rate) which produce
different oversampling rates (OSR) in the interpolation digital filter operation. These are shown in Table 8.
Table 8. Sampling Modes and Oversampling Rates
SAMPLING MODE
SAMPLING FREQUENCY (fS) kHz
OVERSAMPLING RATE (OSR)
Single Rate
8
8 or 16
16
32
44.1
48
Dual Rate
88.2
4
96
Quad Rate
176.4
2
192
Octal Rate
384
1 (Bypass)



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