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Teilenummer | CE2752 |
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Beschreibung | mixed signal CMOS monolithic audio digital to analog converter | |
Hersteller | CEI Microelectronics | |
Logo | ||
Gesamt 10 Seiten Microelectronics
CE2752
Stereo Audio DAC, 24-bit, 192kHz
DESCRIPTION
The CE2752 is a mixed signal CMOS monolithic audio
digital to analog converter. It contains dual multi-bit sigma
delta DAC. The system consists of 128-time interpolation
filters, 3th order multi-bit Σ∆ modulators, switch capacitors
and analog reconstruction filters. The multi-bit Σ∆
converter offers high tolerance to clock jitter and linearity.
The CE2752 support data conversion from 32K to
192KHz. This chip operates at 3.3 volt to reduce the power
consumption and the noise caused by the digital circuit
switching. The CE2752 is ideal for DVD player, AV
receiver and set-top box application.
The CE2752 support 24, 20, 18 and 16-bit input data. It
also support sampling frequency up to 192K.
FEATURES
• Stereo Audio DAC.
- 100 dB SNR (A Weighted).
- - 88dB THD + N Ratio (A Weighted).
- 32K - 192 KHz. Sampling Rates.
- I2S and Left Justified Digital Input Formats.
- On -chip Reconstruction Filters.
•
• 3.3 Power Supply.
Applications
• Digital Surround Sound For Home Theatre.
• DVD Player.
• Car Audio.
• Portable CD.
Block Diagram
XCK
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Clock Det.
DIN1
80
LRCK
BCK
77
78
DIGITAL
AUDIO
INPUT
Sampl
Rate Det.
CEI Microelectronics Co. Ltd.
CE2752
INTERPOLATION
FILTER
Σ∆
Mod.
Σ∆
Mod.
D/A
D/A
AL
AR
Control Logic
FMT DEM
1-10
15
VCM
May 7, 2004
CE2752
SUGGESTED ANALOG RECONSTRUCTION FILTER
A second Sallen Key low pass reconstruction filter is recommend to remove the high frequency sigma delta modulator noise.
The filter’s component values and characteristic are shown in the following figures.
Sallen Key 2nd order LP filter
1000 pF
4.7 uF
2.4 K
8.1 K
100 K
1000 pF
+
-
10 K
18 K
All resistors and capicitors are
5% precision.
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5
0
-5
-10
-15
-20
-25
-30
103
LP F Frequenc y Res pons e
104
Freq (Hz .)
105
6-10 May 7, 2004
6 Page | ||
Seiten | Gesamt 10 Seiten | |
PDF Download | [ CE2752 Schematic.PDF ] |
Teilenummer | Beschreibung | Hersteller |
CE2752 | mixed signal CMOS monolithic audio digital to analog converter | CEI Microelectronics |
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