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PDF CXD2720Q Data sheet ( Hoja de datos )
| Número de pieza | CXD2720Q | |
| Descripción | Single-Chip Digital Signal Processor for Karaoke | |
| Fabricantes | Sony Corporation | |
| Logotipo |  |
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CXD2720Q
Single-Chip Digital Signal Processor for Karaoke
Description
The CXD2720Q is a digital signal processor LSI for
Karaoke, suitable for use in LD/CD/CD-G/video CD
and the like.
A large capacity DRAM and AD/DA converters are
built in, and Karaoke functions such as key control,
microphone echo and voice canceling are contained
on a single chip.
100 pin QFP (Plastic)
Features
• 3-channel 1-bit AD converter and decimation filter
S/N ratio: 88 dB
THD + N: 0.016%
Filter pass band ripple:
less than ±0.5dB
Filter stop band attenuation: less than –41dB
(all characteristics are typical values)
• 2-channel 1-bit DA converter and oversampling
filter
S/N ratio: 98dB
THD + N: 0.006%
Filter pass band ripple:
less than ±0.2dB
Filter stop band attenuation: less than –41dB
(all characteristics are typical values)
• In addition to analog input/output, 2-channel input/
2-channel output of digital input/output are provided.
The interface also supports a variety of formats.
• 128K-bit DRAM for key control and microphone
echo processing
Functions
• Key controller pitch setting can be varied to a
maximum of ±1 octave with a precision of 14 bits
• Microphone echo delay time can be varied to a
maximum of 185ms (when Fs = 44.1kHz)
• Voice canceller supports settings other than center
by the panpot volume
• Voice parametric equalizer
• Voice pitch shifter
• Mixing function to support sound multiplexing
software
• Digital de-emphasis function
Structure
Silicon gate CMOS
Applications
Equipment having Karaoke function, such as
LD/CD, compact music center, video games, etc.
Absolute Maximum Ratings
(Ta = 25°C, VSS = 0V)
• Supply voltage
VDD VSS – 0.5 to +7.0 V
• Input voltage
VI VSS – 0.5 to VDD + 0.5 V
• Output voltage
VO VSS – 0.5 to VDD + 0.5 V
• Operating temperature
Topr –20 to +75
°C
• Storage temperature Tstg –55 to +150 °C
Recommended Operating Conditions
• Supply voltage
VDD 4.5 to 5.5 (5.0 typ.) V
• Operating temperature
Ta
–20 to +75
°C
Input/Output Capacitance
• Input capacitance
CIN 9 (max.)
pF
• Output capacitance
COUT 11 (max.)
pF
• Input/output capacitance CI/O 11(max.)
pF
∗ Measurement conditions: VDD = VI = 0V, F = 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.
–1–
E96426-ST
1 page  
CXD2720Q
DC Characteristics
(AVD0 to 5 = XVDD = VDD0 to 3 = 5V ± 10%, AVS0 to 5 = XVSS = VSS0 to 7 = 0V, Ta = –20 to +75°C)
Item Symbol Conditions
High level VIH
Input voltage (1)
Low level VIL
High level VIH
Input voltage (2)
Low level VIL
Input voltage (3)
VIN Analog input
Output voltage High level VOH
(1) Low level VOL
IOH = –2.0mA
IOL = 4.0mA
Output voltage High level VOH
(2) Low level VOL
IOH = –6.0mA
IOL = 4.0mA
Output voltage High level VOH
(3) Low level VOL
IOH = –12.0mA
IOL = 12.0mA
Input leak current (1)
II
VIH = VDD, VSS
Input leak current (2)
II
VIH = VDD, VSS
Output leak current IOZ VIH = VDD, VSS
Min.
0.7VDD
0.8VDD
VSS
VDD – 0.8
VDD – 0.8
VDD/2
–10
–40
–40
Typ.
Max.
0.3VDD
0.2VDD
VDD
0.4
0.4
VDD/2
10
40
40
Unit
V
V
V
V
V
V
V
V
V
V
V
µA
µA
µA
Applicable pins
∗1, ∗4, ∗5
∗1, ∗4, ∗5
∗3
∗3
∗2
∗6, ∗7, ∗8
∗6, ∗7, ∗8, ∗9
∗10
∗10
∗11
∗11
∗1, ∗3, ∗5
∗4
∗8, ∗9
Feedback resistance
RFB
Resistance
250k 1M 2.5M Ω between ∗5
and ∗11.
Current consumption
IDD
fs = 44.1kHz
79 90 mA
∗1 RVDT, SCK, XLAT, XWO, XRST, XS24, TST0 to TST5, X768, SI, XMST
∗2 AIN1, AIN2, AIN3
∗3 INVI
∗4 During input to bidirectional pins BCK, LRCK
∗5 XTLI
∗6 During output from bidirectional pins BCK, LRCK
∗7 SO, BFOT
∗8 TRDT
∗9 REDY
∗10 AO1P, AO1N, AO2N, AO2P
∗11 XTLO
–5–
5 Page 
CXD2720Q
CXD2720Q
(Master mode)
150p
10µ Rin
12k 22k
39k
8200p
AINx AOxN
2.2k 2.2k
OUT
Vin
1M
330p
AOxP
820p
12k 22k
39k
150p
Figure 1-1. ADC + DAC Measurement Circuit Diagram
CXD2720Q
(Slave mode)
768fs
XTLI
48fs
BCK
fs
LRCK AOxN
DATA
SI AOxP
(fs = 44.1kHz)
12k 22k
330p
12k 22k
39k
150p
8200p
39k
2.2k 2.2k
150p
820p
OUT
Figure 1-2. DAC Measurement Circuit Diagram
– 11 –
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet CXD2720Q.PDF ] | |
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