CXD2548R Datasheet, PDF (1/113 Pages) Sony Corporation – CD Digital Signal Processor with Built-in Digital Servo and DAC

CXD2548R
CD Digital Signal Processor with Built-in Digital Servo and DAC
For the availability of this product, please contact the sales office.
Description
The CXD2548R is a digital signal processor LSI for
CD players. This LSI incorporates a digital servo,
digital filter, zero detection circuit, 1-bit DAC and
analog low-pass filter on a single chip.
112 pin LQFP (Plastic)
Features
• All digital signal processing during playback is
performed with a single chip
• Highly integrated mounting possible due to a built-
in RAM
Digital Signal Processor (DSP) Block
• Playback mode which supports CAV (Constant
Angular Velocity)
• Frame jitter free
• 0.5 × to 2.5 × continuous playback possible
• Allows relative rotational velocity readout
• Supports spindle external control
• Wide capture range playback mode
• Spindle rotational velocity following method
• Supports normal-speed, double-speed playback
• 16K RAM
• EFM data demodulation
• Enhanced EFM frame sync signal protection
• SEC strategy-based error correction
• Subcode demodulation and Sub Q data error
detection
• Digital spindle servo
• 16-bit traverse counter
• Asymmetry compensation circuit
• CPU interface on serial bus
• Error correction monitor signal, etc. output from a
new CPU interface
• Servo auto sequencer
• Digital audio interface outputs
• Digital level meter, peak meter
Digital Servo (DSSP) Block
• Microcomputer software-based flexible servo control
• Offset cancel function for servo error signal
• Auto gain control function for servo loop
• E:F balance, focus bias adjustment functions
• Surf jump function supporting micro two-axis
Digital Filter, DAC and Analog Low-Pass Filter Blocks
• Digital de-emphasis
• Digital attenuation
• Zero detection function
• 8Fs oversampling digital filter
• S/N: 100dB or more (master clock: 384Fs, typ.)
• THD + N: 0.007% or more (master clock: 384Fs,
typ.)
• Rejection band attenuation: –60dB or more
Applications
CD players
Structure
Silicon gate CMOS IC
Absolute Maximum Ratings
• Supply voltage
VDD
–0.3 to +7.0 V
• Input voltage
VI
–0.3 to +7.0 V
(VSS – 0.3V to VDD + 0.3)
• Output voltage
VO
–0.3 to +7.0 V
• Storage temperature Tstg
–40 to +125 °C
• Supply voltage difference
VSS – AVSS –0.3 to +0.3 V
VDD – AVDD –0.3 to +0.3 V
Recommended Operating Conditions
• Supply voltage
VDD^Note) –3.4 to +5.25 V
• Operating temperature Topr
–20 to +75 °C
Note) The VDD (Min.) for the CXD2548R varies
according to the playback speed selection.
Playback
VDD (min.) [V]
speed _{CD-DSP block DAC block DSSP block}
2×
3.4V
4.5V
3.4V
1×
1 ×∗¹
3.4V
3.4V
3.4V
3.4V
3.4V
∗1 _{When the internal operation of the CD-DSP side}
is set to double-speed mode and the crystal
oscillation frequency is halved, normal-speed
playback results.
I/O Capacitance
• Input pin
CI
• Output pin
CO
12 (Max.) pF
12 (Max.) pF
Note) Measurement conditions VDD = VI = 0V
fM = 1MHz
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.
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E96404-PS