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參數(shù)資料
| 型號： | 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） |
| 文件頁數(shù)： | 8/61頁 |
| 文件大小： | 467K |
| 代理商： | CXD2728Q |
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CXD2728Q
Analog Characteristics
(AVD0 to 6 = V
DD
0 to 2 = AVDX = 3.3V, AVS0 to 6 = V
SS
0 to 5 = AVSX = 0V, fs = 44.1kHz, Ta = 25°C)
When Pro Logic mode is on, the input signal level while measuring the center (C) and surround (S) channels
should be –3dB smaller than the input level while measuring the left (L) and right (R) channels. At this time, for
the C channel, the signal is input in-phase, and for the S channel, the signal is input at reversed phase to each
L and R channel.
The input level is the same for all measurement items when Pro Logic mode is off.
1. ADC + DAC Connection Total Characteristics
These are the total characteristics for the ADC and DAC. Use the analog I/O circuits in the Application Circuit
for the measurement circuit.
1-1. When Pro Logic Mode is on
Unless otherwise specified, the measurement conditions are as given below.
V
IN
(L, R measurement) = 300mVrms (0dB), V
IN
(C, S measurement) = 212mVrms (–3dB)
F
IN
= 1kHz
Sampling frequency = 44.1kHz
Measured bands = 10Hz to 20kHz
1
When V
IN
= 200mVrms (= –3.52dB = –20dBFS), the S/N ratio is 3.52dB smaller than the values noted in
the table above.
2
V
IN
(L, R) = 2.0Vrms, V
IN
(C, S) = 1.414Vrms
3
V
IN
(L, R) = 300mVrms, V
IN
(C, S) = 212mVrms
4
V
IN
(L, R) = 200mVrms, V
IN
(C, S) = 141mVrms
5
When the L and R channel gain deviation is 0.1dB or less in the prefilter output.
6
Including amplification by the external amplifier (L/Rch: 11.35dB, C/Sch: 14.42dB)
Channels
L, R
C, S
L, R
C, S
L, R
C, S
L, R
C, S
L, R
C, S
L, R
C, S
L, R
C, S
(all)
(all)
L, R
C
S
Min.
65.5
65.5
25
25
Typ.
72
70
57
52
0.006
0.006
0.03
0.03
0.045
0.045
0.23
0.32
16.5
53
45
300
±0.2
17.2
43.1
24
–9
30
Max.
1.00
1.00
Unit
dB
%
dB
dB
mV
dB
mA
dB
Item
S/N ratio
1
(THD + N)/S
Head room
Matrix rejection
5
Output level
Level difference between channels
Current consumption
Power supply fluctuation
elimination ratio
6
Measurement conditions
CCIR/ARM filter
Measured bands:
70Hz to 300kHz
16.5dB
2
0dB
3
–3.52dB
4
Measured bands:
70Hz to 300kHz
(THD + N)/S = 1%
Analog system
(including oscillator circuit)
Digital system
100mVrms,
100Hz sine wave
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