CXD2598Q Datasheet, PDF (1/147 Pages) Sony Corporation – CD Digital Signal Processor with Built-in Digital Servo and DAC

CXD2598Q
CD Digital Signal Processor with Built-in Digital Servo and DAC
Description
The CXD2598Q is a digital signal processor LSI for
CD players. This LSI incorporates a digital servo,
digital filter, 1-bit DAC and analog low-pass filter on a
single chip.
100 pin QFP (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 supporting CAV (Constant Angular
Velocity)
• Frame jitter free
• 0.5× to 4× continuous playback possible
• Allows relative rotational velocity readout
• Wide capture range playback mode
• Spindle rotational velocity following method
• Supports normal-speed to 4× speed playback
• Supports variable pitch playback
• The bit clock, which strobes the EFM signal, is
generated by the digital PLL.
• EFM data demodulation
• Enhanced EFM frame sync signal protection
• Refined super strategy-based powerful error correction
C1: double correction, C2: quadruple correction
Supported during 4× speed playback
• Noise reduction during track jumps
• Auto zero-cross mute
• Subcode demodulation and Sub-Q data error detection
• Digital spindle servo
• 16-bit traverse counter
• Asymmetry correction circuit
• CPU interface on serial bus
• Error correction monitor signal, etc. output from a
new CPU interface
• Servo auto sequencer
• Fine search performs track jumps with high accuracy
• Digital audio interface outputs
• Digital level meter, peak meter
• Bilingual compatible
• VCO control mode
• CD TEXT data demodulation
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
• Tracking filter: 6 stages
Focus filter: 5 stages
Digital Filter, DAC and Analog Low-Pass Filter Blocks
• DBB (digital bass boost) function
• Digital de-emphasis
• Digital attenuation
• 8fs oversampling digital filter
• Adoption of tertiary ∆∑ noise shaper
• S/N: 100dB or more (master clock: 384Fs, typ.)
Logical value: 109dB
• THD + N: 0.007% or less (master clock: 384Fs, typ.)
• Rejection band attenuation: –60dB or less
• Double-speed playback supported
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 + 0.3V)
• Output voltage
VO
–0.3 to +7.0 V
(Vss – 0.3V to VDD + 0.3V)
• 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
Note) AVDD includes XVDD and AVSS includes XVSS.
Recommended Operating Conditions
• Supply voltage
VDD
2.7 to 5.5
V
• Operating temperature Topr –20 to +75 °C
Note) The VDD for the CXD2598Q varies according
to the playback speed selection.
VDD[V]
Playback speed
CD-DSP block DAC block
4×
4.75 to 5.25
2×
3.0 to 5.5
4.5 to 5.5
1×
2.7 to 5.5
2.7 to 5.5
I/O Pin Capacitance
• Input capacitance CI
11 (Max.) pF
• Output capacitance CO
11 (Max.) pF
• I/O capacitance
CI/O
11 (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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E97Y14-PS