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參數(shù)資料
| 型號(hào)： | CXD2728Q |
| 廠商： | Sony Corporation |
| 英文描述： | Single-Chip Dolby Pro Logic Surround Decoder(單片杜比環(huán)繞Pro邏輯解碼器) |
| 中文描述： | 單片杜比定向邏輯環(huán)繞聲解碼器（單片杜比環(huán)繞專業(yè)邏輯解碼器） |
| 文件頁(yè)數(shù)： | 9/61頁(yè) |
| 文件大?。?/td> | 467K |
| 代理商： | CXD2728Q |
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– 9 –
CXD2728Q
1-1. When Pro Logic Mode is off
Unless otherwise specified, the measurement conditions are as given below.
V
IN
(L, R, C, S) = 2Vrms (0dB), 1kHz
Sampling frequency = 44.1kHz
Measured bands = 10Hz to 20kHz
Channels
(all)
(all)
(all)
(all)
(all)
Min.
Typ.
90
0.006
90
506
2.00
–6
Max.
Unit
dB
%
dB
mVrms
Vrms
dB
Item
S/N ratio
(THD + N)/S
1
Dynamic range
2
ADC maximum input level
3
Output level
4
Power supply fluctuation
elimination ratio
5
1
See Graph 1: ADC Characteristics.
2
S/(THD + N) during –60dB input
3
The ADC maximum input level depends on the supply voltage (AVDn), so when the supply voltage (AVDn)
contains deviation, calculate the maximum input level from the formula below and adjust the level so that
the waveform is not clipped at the minimum voltage.
Measurement conditions
"A" weighting filter
0dB
"A" weighting filter
100mVrms, 100Hz sine wave
Maximum input level [Vrms] = 0.506 [Vrms]
×
4
Like the ADC, the DAC conversion gain also varies according to the supply voltage (AVDn). However, the
DAC has the reverse characteristics of the ADC, so the total gain between the ADC and DAC is constant.
5
Including amplification by the external amplifier (L/Rch: 11.35dB, C/Sch: 14.42dB)
Minimum supply voltage [V]
3.3 [V]
2m
0.001
GEN VOLT [Vrms]
T
0.002
0.005
0.010
0.020
0.050
0.100
0.200
0.500
1
2
5
3m
5m
10m
20m
50m
0.1
0.2
0.5
1
2
Graph 1. ADC Characteristics
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