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PCMD3140 датащи(PDF) 13 Page - Texas Instruments

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номер детали PCMD3140
подробное описание детали  PCMD3140-Q1 Quad-Channel, PDM Input to TDM or I2S Output Converter
PDF  111 Pages
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производитель  TI [Texas Instruments]
домашняя страница  http://www.ti.com
Logo TI - Texas Instruments

PCMD3140 датащи(HTML) 13 Page - Texas Instruments

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6.12 Typical Characteristics (continued)
at TA = 25°C, AVDD = 3.3 V, IOVDD = 3.3 V, fIN = 1-kHz sinusoidal signal, fS = 48 kHz, PDMCLKx = 64 × fS, 32-bit
audio data, BCLK = 256 × fS, TDM slave mode, PLL on, and linear phase decimation filter (unless otherwise noted); all
performance measurements are done with a 20-kHz, low-pass filter and an A-weighted filter (unless otherwise noted); all
measurements are done by feeding the device PDM digital input signal using audio precision
Frequency (Hz)
20 30
50 70 100
200300 500 1000 2000
5000 10000 20000
100000
-120
-110
-100
-90
-80
-70
-60
-50
-40
-30
-20
-10
0
10
20
Freq
D007
Channel-1
Channel-2
Channel-3
Channel-4
4th-order PDM modulator with PDMCLKx = 3.072 MHz
Figure 6-10. Frequency Response With a –20-dBr Input
Frequency (Hz)
20
30 4050 70 100
200 300
500
1000
2000
5000
10000
20000
-200
-180
-160
-140
-120
-100
-80
-60
-40
-20
0
D008
Channel-1
Channel-2
Channel-3
Channel-4
4th-order PDM modulator with PDMCLKx = 3.072 MHz
Figure 6-11. FFT With a –60-dBr Input
Input Amplitude (dB)
-130
-115
-100
-85
-70
-55
-40
-25
-10
-1
-130
-120
-110
-100
-90
-80
-70
-60
THD+
D009
Channel-1
Channel-2
Channel-3
Channel-4
4th-order PDM modulator with PDMCLKx = 1.536 MHz
Figure 6-12. THD+N vs Input Amplitude
Frequency (Hz)
20
30 4050 70 100
200 300
500
1000
2000
5000
10000
20000
-130
-120
-110
-100
-90
-80
-70
-60
D010
Channel-1
Channel-2
Channel-3
Channel-4
4th-order PDM modulator with PDMCLKx = 1.536 MHz
Figure 6-13. THD+N vs Input Frequency With a –20-dBr Input
Frequency (Hz)
20 30
50 70 100
200300 500 1000 2000
5000 10000 20000
100000
-120
-110
-100
-90
-80
-70
-60
-50
-40
-30
-20
-10
0
10
20
Freq
D011
Channel-1
Channel-2
Channel-3
Channel-4
4th-order PDM modulator with PDMCLKx = 1.536 MHz
Figure 6-14. Frequency Response With a –20-dBr Input
Frequency (Hz)
20
30 4050 70 100
200 300
500
1000
2000
5000
10000
20000
-200
-180
-160
-140
-120
-100
-80
-60
-40
-20
0
D012
Channel-1
Channel-2
Channel-3
Channel-4
4th-order PDM modulator with PDMCLKx = 1.536 MHz
Figure 6-15. FFT With a –60-dBr Input
www.ti.com
PCMD3140-Q1
SBASAH3A – APRIL 2022 – REVISED SEPTEMBER 2022
Copyright © 2022 Texas Instruments Incorporated
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