CXD2508AQ Datasheet, PDF (1/49 Pages) Sony Corporation – CD Digital Signal Processor

CXD2508AQ/AR
CD Digital Signal Processor
For the availability of this product, please contact the sales office.
Description
The CXD2508AQ/AR is a digital signal processor
for CD players and is equipped with built-in digital
filters, no-sound data detection circuit, and 1-bit
DAC.
CXD2508AQ
80 pin QFP (Plastic)
CXD2508AQ
80 pin QFP (Plastic)
Features
DSP block
• Digital PLL
• EFM frame sync protection
• SEC strategy-based error correction
• Subcode demodulation, CRC checking
• Digital spindle servo
CXD2508AQ
80 pin QFP (Plastic)
CXD2508AR
80 pin LQFP (Plastic)
• Servo auto sequencer
• Asymmetry compensation circuit
• Digital audio interface output
• 16K RAM
• Double-speed playback capability
• New microcomputer interface circuit
Digital filter, DAC block
• Double-speed playback capability
• Digital de-emphasis
• Digital attenuation
Applications
CD players
• No-sound data detection circuit
• 4 Fs oversampling filter
• Secondary ∆∑ noise shaper
Structure
Silicon gate CMOS IC
• PWM-system pulse conversion output
Absolute Maximum Ratings
Recommended Operating Conditions
• Supply voltage VDD ^Note) 4.5 to 5.5V
(double-speed playback)
3.5 to 5.5V
(normal-speed playback)
3.4 to 5.5V
(low power consumption
or special playback mode)
• Operating temperature
• Supply voltage VDD
–0.3 to 7.0
V
• Input voltage VI
–0.3 to 7.0
V
• Input voltage VIN Vss–0.3V (min.) VDD+0.3 (max.) V
• Output voltage VO
–0.3 to 7.0
V
• Storage temperature
Tstg
–40 to 125
°C
• Supply voltage variation
VSS–AVSS –0.3V (min.) +0.3V (max.)
VDD–AVDD –0.3V (min.) +0.3V (max.)
Topr –20 (min.) 75 (max.) °C
Note) VDD (min.) is varied by the playback speed and built-in
VCO in the CXD2508AQ/AR. 4.5V is the value using the
VCO which generates the slower frequency in double-
speed playback. The table below shows the VDD (min.)
for each condition.
Playback
speed
VDD (min.) [V]
VCO
high-speed
VCO
normal-speed
DAC block
×2
3.40
4.50
3.40
×1
3.40
3.50
3.40
× 1^∗
3.40
3.40
3.40
∗ _{When the internal operation of the LSI is set to double-}
speed mode and the crystal oscillation frequency is
halved, normal-speed playback results.
Sony reserves the right to change products and specifications without prior notice. This information does not convey any license by
any implication or otherwise under any patents or other right. Application circuits shown, if any, are typical examples illustrating the
operation of the devices. Sony cannot assume responsibility for any problems arising out of the use of these circuits.
–1–
E94602A54-ST