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CE2746 の電気的特性と機能

CE2746のメーカーはETCです、この部品の機能は「6-Channel Audio DAC 24-bit 192kHz」です。


製品の詳細 ( Datasheet PDF )

部品番号 CE2746
部品説明 6-Channel Audio DAC 24-bit 192kHz
メーカ ETC
ロゴ ETC ロゴ 




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CE2746 Datasheet, CE2746 PDF,ピン配置, 機能
Microelectronics
CE2746
6-Channel Audio DAC, 24-bit, 192kHz
DESCRIPTION
The CE2746 is a mixed signal CMOS monolithic audio
digital to analog converter. It contains six 1-bit sigma delta
DAC. The system consists of 128-time interpolation filters,
4th order Σ∆ modulators, switch capacitors and analog
reconstruction filters. The one bit Σ∆ converter offers
superior differential linearity, with no distortion due to
component mis-match. high tolerance to clock jitter.
The CE2746 support data conversion from 32K to
192KHz. The analog section operates at 5 volt while the
digital section at 3.3 volt. This dual voltage system reduces
not only the power consumption but also the noise caused
by the digital circuit switching. The CE2746 is ideal for
DVD player, AV receiver and set-top box application.
The CE2746 support 24, 20, 18 and 16-bit input data. It
also support multiple sampling frequency data. Each DAC
has its own individual volume control.
FEATURES
• Six Channel Audio DAC.
- 104 dB SNR (A Weighted).
- -94 dB THD + N Ratio (A Weighted).
- 8K - 192 KHz. Sampling Rates.
- Independent Digital Volume Control.
- I2S, Left and Right Justified Digital Input Formats.
- On -chip Reconstruction Filters.
• 3.3 -volt Digital Interface.
• 2-wire Serial Control Interface.
• 3.3 Volt Digital. 5 Volt Analog Power Supply.
Applications
• Digital Surround Sound For Home Theatre
• DVD
• Car Audio.
XCK PLL
DIN1
DIN2
DIN3
80
80
77
LRCK
BCK
77
78
DIGITAL
AUDIO
INPUT
Format
Detect'n
CEI Microelectronics Co. Ltd.
CE2746
INTERPOLATION
FILTER
Σ∆
Mod.
Σ∆
Mod.
Σ∆
Mod.
D/A
D/A
D/A
D/A
D/A
D/A
Control Interface
SDA
SCL
15
RST
15
VCM
AR1
AL1
AR2
AL2
AR3
AL3
1-18 March 24, 2004

1 Page





CE2746 pdf, ピン配列
CE2746
XCK REQUIREMENT
The CE2746 supports 384 and 256 times sampling clock for 32, 44.1, 48, 96 and 192K audio; 192 or 128 times for the 96 K
audio.; and 96 and 64 times for the 192K audio.
XCK Requirement
Sampling
Rate
fs
32 K
44.1
48 K
96 K
192 K
CREG1[5:4]=[0 0]
Normal XCK
384*fs
256*fs
12.288 MHz 8.192 MHz
16.934 Mhz 11.29 Mhz.
18.432 MHz 12.288 Mhz.
18.432 MHz 12.288 Mhz.
18.432 Mhz 12.288 Mhz.
XCK Freq.
CREG1[5:4]=[1 0]
4 times XCK
4*384*fs
4*256*fs
49.152 MHz 32.768 MHz
67.738 Mhz 45.158 Mhz.
73.728 MHz 49.152 Mhz.
73.728 MHz 49.152 Mhz.
73.728 Mhz 49.152 Mhz.
CREG1[5:4]=[0 1]
2 times XCK
2*384*fs
2*256*fs
24.576 MHz 16.384 MHz
33.869 Mhz 22.579 Mhz.
36.864 MHz 24.576 Mhz.
36.864 MHz 24.576 Mhz.
36.864 Mhz 24.576 Mhz.
3-18 March 24, 2004


3Pages


CE2746 電子部品, 半導体
CE2746
DIGITAL AUDIO SERIAL INTERFACE
The digital serial interface consists of 3 serial input pins, DIN1, DIN2, DIN3, and one serial clock input pin, BCK, and one
left/right indicator input pin, LRCK. The data are 2’s complement MSB first numbers. The CE2746 supports four resolution,
which are selected programming the control register CREG0[5:4] via the I2C serial control port. Table 1 describes these four
resolution.
Table (1): Audio Serial Data Input Resolution,
Format CREG0[5:4]
0 00
1 01
2 10
3 11
DIN[3:1]
24-bit (default)
20-bit
18-bit
16-bit
The DIN3, DIN2 and DIN1 can be either 24-bit or 32-bit per frame as well as left justified, right justified or I2S. The CE2746
counts the number of BCK per frame to determine whether the input is 24 or 32 bits format.
Table (2): Audio Serial Data Input Modes
Mode
0
1
2
3
CREG0[7:6]
DIN[3:1]
00 Right Justified
01 I2S
10 Left Justified (default)
11 Invalid
6-18 March 24, 2004

6 Page



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部品番号部品説明メーカ
CE2746

6-Channel Audio DAC 24-bit 192kHz

ETC
ETC


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