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CXA2561Q
Dolby B-C Type Noise Reduction System with Playback Equalizer Amplifier
Description The CXA2561Q is an IC designed for use in car stereo cassette decks. Functions include Dolby B-C type noise reduction (NR) system, playback equalizer amplifier and music sensor into a single chip. Features * Few external parts * Small package (40-pin QFP) * Same pin configuration as for the Dolby B type NR system (CXA2560Q) and no Dolby NR system (CXA2559Q) * Dolby B-C type NR and playback equalizer amplifier into a single chip * FORWARD/REVERSE head select switch * Mute function * Music signal interval detection level can be set by the external resistors/capacitors (2 modes). * High-frequency cut-off of the music sensor circuit can be adjusted by the external capacitance. Applications * Car stereo cassette decks * Playback-only cassette decks 40 pin QFP (Plastic)
Structure Bipolar silicon monolithic IC Absolute Maximum Ratings * Supply voltage VCC * Operating temperature Topr * Storage temperature Tstg * Power dissipation PD Operating Condition Supply voltage
12 -40 to +85 -65 to +150 430
V C C mW
VCC
7.8 to 11
V
This IC is available only to the licensees of Dolby Laboratories Licensing Corporation from whom licensing and applications information may be obtained. "Dolby" and the double D symbols are trademarks of Dolby Laboratories Licensing Corporation. 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-
E97439A79-PS
CXA2561Q
Block Diagram and Pin Configuration
OUTREF2
TAPEIN2
PBTC2
PBOUT2
LINEOUT2
DIREF
TCH2
GND
30 PBFB2 PBRIN2 31 32
29 7k/12k
28
27
26
25
24
23 NR
TCL2
22
21 20 19 MSMODE DRSW TAPESW MUTESW NRSW NRMODE MSOUT MSTC G1FB G2FB
70/120
100k T2 x1 BIAS MUTE TAPE EQ
OFF/ B/C MS MODE 18 17 NR MODE 16 15 MS ON/ OFF DET F3 T1 OFF/ B/C NR 12 11 9 10 14 13
300k
PBGND 33 F2 PBFIN2 34 30k VCT 35 45k PBREF 36 30k PBFIN1 37 F1 PBGND 38 300k PBRIN1 39 7k/12k PBFB1 40 1 2 3
FWD/RVS VCC LPF
x1
70/120
100k
4
5
6
7
8
TCH1
LINEOUT1
PBOUT1
OUTREF1
TAPEIN1
-2-
MSLPF
PBTC1
TCL1
Vcc
NC
MSSW
CXA2561Q
Pin Description Pin No. Symbol Typical pin voltage DC AC I/O I/O resistance
(Ta = 25C, VCC = 8.0V, DVCC = 5.0V) Equivalent circuit Description
Vcc
1 30
PBTC1 PBTC2
4.0V
--
--
--
147 1 30
Playback equalizer amplifier capacitance.
GND
31 40
Vcc
2p
2 29
PBOUT1 PBOUT2
300k
4.0V
-25dBm
O
--
200 200
2 29 147
Playback equalizer amplifier output.
GND
Vcc
3 28
OUTREF1 OUTREF2
200
4.0V
--
O
--
3 28 200
Output reference. (Vcc/2 output)
GND
Vcc
4 27
TAPEIN1 TAPEIN2
4.0V
-30dBm
I
100k
147 4 27 100k 30p
TAPE input.
VGS
GND
5
Vcc
8.0V
--
--
-- -3-
Power supply.
CXA2561Q
(Ta = 25C, VCC = 8.0V, DVCC = 5.0V) Pin No. Symbol Typical pin voltage DC AC I/O I/O resistance Equivalent circuit Description
Vcc
7 24
LINEOUT1 LINEOUT2
4.0V
-6dBm
O
--
147 7 24 200
200
Line output.
22.5k
GND
Vcc
8 23
TCH1 TCH2
0.3V
--
--
--
147 8 23 330k
36k
Time constant for the HLS.
GND
Vcc
9 22
TCL1 TCL2
0.3V
--
--
--
147 9 22 480k
13.5k
Time constant for the LLS.
GND
Vcc
100k
10
MSLPF
4.0V
--
--
100k
147 10 64p
Cut-off frequency adjustment of the music sensor LPF.
GND
-4-
CXA2561Q
(Ta = 25C, VCC = 8.0V, DVCC = 5.0V) Pin No. Symbol Typical pin voltage DC AC I/O I/O resistance Equivalent circuit
Vcc
Description
11 12
G2FB G1FB
500
4.0V
--
--
--
147 11 12 500
Music signal interval detection level setting.
GND
Vcc
13
MSTC
--
--
--
--
147 13
853
Time constant for detecting the music signal interval.
10k
GND
Vcc
14
MSOUT
0.2V when a signal is detected; DVcc when no signal is detected.
--
O
--
14
Music sensor output.
GND
15
NRMODE
Dolby NR mode control. Low (open): Dolby B NR High: Dolby C NR
Vcc
17
MUTESW 0.0V when open.
15
--
I
100k
147 100k
17 18 21
Mute function control. Low (open): Mute OFF High: Mute ON Playback equalizer amplifier control. Low (open): 70s High: 120s Music sensor control. Low (open): MS ON High: MS OFF
18
TAPESW
GND
21
MSSW
-5-
CXA2561Q
(Ta = 25C, VCC = 8.0V, DVCC = 5.0V) Pin No. Symbol Typical pin voltage DC AC I/O I/O resistance Equivalent circuit Description
Vcc
16
NRSW 0.0V when open.
147
Dolby NR control. Low (open): NR OFF High: NR ON
--
I
100k
16 19 100k
19
DRSW
GND
Head select control. Low (open): FORWARD High: REVERSE
Vcc
20
MSMODE
0.0V when open.
--
I
100k
147 20 100k
Music sensor mode control. Low (open): G1 High: G2
GND
Vcc
25
DIREF
1.2V
--
--
--
25
147
Resistance for setting the reference current. (Connects 20k between DIREF pin and GND for the standerd setting.)
GND
26 31 40
GND PBFB2 PBFB1
0.0V
--
--
--
Ground. Playback equializer amplifier feedback.
4.0V
-70dBm
I
--
Vcc
32 39
PBRIN2 PBRIN1 4.0V -70dBm I --
32 39 34 37
150
150 31 40 50p 50p
Playback equializer amplifier input. (REVERSE head connected) Playback equializer amplifier input. (FORWARD head connected)
34 37
PBFIN2 PBFIN1
GND
-6-
CXA2561Q
(Ta = 25C, VCC = 8.0V, DVCC = 5.0V) Pin No. 33 38 Symbol Typical pin voltage DC PBGND 0.0V AC -- -- I/O I/O resistance -- Equivalent circuit Description Playback equializer amplifier ground. (Connect to ground.)
Vcc 30k 147
35
VCT
4.0V
--
O
--
VGS 35 45k 30k GND x1
Center. (Vcc/2 output)
Vcc
200
36
PBREF
4.0V
--
O
--
36 200
Playback equializer amplifier reference. (Vcc/2 output)
GND
6
NC
--
--
--
--
No connected.
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CXA2561Q
Electrical Characteristics Item Operating voltage Current consumption Symbol Vopr ICC Measurement conditions
(Ta = 25C, VCC = 8.0V. DVCC = 5.0V) Min. 7.8 No signal, NR OFF, MUTE OFF, 70s, MS ON 13.0 Typ. 8.0 19.2 Max. 11.0 25.0 Unit V mA
Dolby NR (0dB = Dolby level LINEOUT of -6dBm) TAPEIN input sensitivity B type decode boost characteristics 1 B type decode boost characteristics 2 B type decode boost characteristics 3 B type decode boost characteristics 4 B type decode boost characteristics 5 C type decode boost characteristics 1 C type decode boost characteristics 2 C type decode boost characteristics 3 C type decode boost characteristics 4 C type decode boost characteristics 5 C type decode boost characteristics 6 Total harmonic distortion 1 Total harmonic distortion 2 Total harmonic distortion 3 Decode S/N ratio 1 Decode S/N ratio 2 Signal handling Crosstalk between channels 1 VTIN BP1 BP2 BP3 BP4 BP5 CP1 CP2 CP3 CP4 CP5 CP6 THD1 THD2 THD3 SN1 SN2 SH1 CT1 TAPEIN 1kHz, LINEOUT 0dB, NR OFF TAPEIN 500Hz, LINEOUT -25dB, NR B TAPEIN 2kHz, LINEOUT -25dB, NR B TAPEIN 5kHz, LINEOUT -25dB, NR B TAPEIN 10kHz, LINEOUT -40dB, NR B TAPEIN 10kHz, LINEOUT 0dB, NR B TAPEIN 500Hz, LINEOUT -60dB, NR C TAPEIN 500Hz, LINEOUT -25dB, NR C TAPEIN 2kHz, LINEOUT -60dB, NR C TAPEIN 2kHz, LINEOUT -25dB, NR C TAPEIN 5kHz, LINEOUT -25dB, NR C TAPEIN 10kHz, LINEOUT 0dB, NR C TAPEIN 1kHz -20dBm, NR OFF, RL = 2.7k TAPEIN 1kHz -20dBm, NR B, RL = 2.7k TAPEIN 1kHz -20dBm, NR C, RL = 2.7k No signal, NR B, Rg = 5.1k, CCIR/ARM filter used No signal, NR C, Rg = 5.1k, CCIR/ARM filter used TAPEIN 1kHz, NR OFF, RL = 2.7k, THD = 1% TAPEIN 1kHz -24dBm, NR OFF, 1kHz BPF used -32.0 -30.0 -28.0 dBm 1.4 5.5 3.9 9.7 -1.1 14.2 7.2 18.7 5.4 3.5 -5.5 -- -- -- 77.0 80.0 13.0 -- 2.9 7.0 5.4 10.4 0.4 16.2 9.2 20.7 7.4 5.5 -3.5 0.01 0.04 0.05 87.0 82.0 14.4 4.4 8.5 6.9 11.9 1.9 18.2 11.2 22.7 9.4 7.5 -1.5 0.2 0.2 0.3 -- -- -- dB dB dB dB dB dB dB dB dB dB dB % % % dB dB dB dB
-96.0 -70.0
-8-
CXA2561Q
Item Mute characteristic Output DC offset voltage
Symbol MUTE VOS1
Measurement conditions TAPE IN 1kHz -24dBm, MUTE ON 1kHz BPF used, NR OFF No signal, NR OFF, difference from VCT
Min. -- -0.1
Typ.
Max.
Unit dB V
-110.0 -70.0 0.0 0.1
Playback Equalizer Amplifier Playback equalizer amplifier PBREF reference output level Playback equalizer amplifier F120 frequency response 1 Playback equalizer amplifier F70 frequency response 2 Signal handling SH2 PBIN 315Hz -70dBm, 120s mode PBIN 2.7kHz -58.5dBm, 120s mode at 315Hz PBIN 4.5kHz -53.8dBm, 70s mode at 315Hz PBIN 1kHz, 120s mode, RL = 2.7k, THD = 1% PBIN 1kHz -52dBm, 120s mode, RL = 2.7k No signal, 70s mode, Rg = 680, CCIR/ARM filter used No signal, 120s mode, Rg = 680, difference from VCT PBIN 1kHz -52dBm, 120s mode, 1kHz BPF used PBIN 1kHz -52dBm, 120s mode, 1kHz BPF used -27.0 -25.0 -23.0 dBm -1.5 -1.5 -10.0 -- 57.0 -1.0 -- -- 0.0 0.0 -3.0 0.07 63.5 0.0 1.5 1.5 -- 0.5 -- 1.0 dB dB dBm % dB V dB dB
Total harmonic distortion THD4 S/N ratio SN3
Output DC offset voltage VOS2 Crosstalk between channels CT4
-75.0 -70.0 -80.0 -70.0
Crosstalk between CT5 FORWARD and REVERSE Music Sensor Signal detection level 1 Signal detection level 2 MS output leak current MS output saturation voltage Logic Voltage Low level VIL VMS1 VMS2 IOH VOL
TAPEIN 5kHz, MS ON, G1 mode, external constant of 39k and 0.0047F TAPEIN 5kHz, MS ON, G2 mode, external constant of 3.9k and 0.47F No signal, MS OFF, G1 mode TAPEIN 5kHz -30dBm, MS ON, G1 mode, 1mA applied to MSOUT pin
-43.0 -40.0 -37.0 dBm -63.0 -60.0 -57.0 dBm -- -- 0.0 0.3 1.0 1.0 A V
Input voltage of NRMODE, NRSW, MUTESW, TAPESW, DRSW, MSMODE, MSSW Input voltage of NRMODE, NRSW, MUTESW, TAPESW, DRSW, MSMODE, MSSW
0.0
--
0.8
V
High level
VIH
2.5
--
VCC
V
-9-
CXA2561Q
Electrical Characteristics Measurement Circuit
R27 10k R26 100 R25 10k R24 100 R23 10k
S21 S20 S19 S18 S17 DC Voltmeter
R13 2.7k S10
C9 2.2 R8 2.7k
S8
R10 5.1k
R11 20k
0dB or 30dB Amp C19 0.1 C21 0.068 R28 50k S22 GND GND MSMODE H/L DRSW H/L TAPESW H/L MUTESW H/L NRSW H/L NRMODE H/L R16 100k MSOUT 14 MSTC 13 G1FB 12 DVCC R22 10k S16 CCIR/ARM C24 0.1 R15 39k R14 3.9k S23 R17 1MEG C23 4.7n C22 0.47 Distortion Analyzer C15 270p Oscilloscope +20dB 1kHz BPF S24 +20dB DIN Audio "A" WTG
C12 1 27 26 25
C17 2.2 24 23 22 21
MSSW H/L
OFF: 0dB ON: 30dB
TAPEIN2
PBTC2
PBOUT2
LINEOUT2
OUTREF2
MSSW
GND
DIREF
TCH2
TCL2
Audio SG
C7 0.01
30
29
28
S6
S4
C5 2.2
R2 270 R6 680
31 PBFB2 32 PBRIN2 33 PBGND 34 PBFIN2 35 VCT
MSMODE 20 DRSW 19 TAPESW 18 MUTESW 17 NRSW 16
S27
S26
S3 Power Supply VCC
C4 2.2
R5 680
S25
C3 22 36 PBREF S2 GND C2 2.2 R4 680 S1 C1 2.2 37 PBFIN1
CXA2561Q NRMODE 15
OUTREF1
LINEOUT1
TCH1
S5
C6 0.01
NC
1
2 R7 2.7k
3
4 C10 22
5
6 C16 2.2
7
8
9
10
S7
S11
C8 2.2
R12 2.7k S9
R9 5.1k
C11 1
C18 0.1
C20 0.068
MSLPF
PBTC1
40 PBFB1
PBOUT1
TAPEIN1
DC Ammeter
A
R1 270
R3 38 PBGND 680 39 PBRIN1
G2FB 11
VCC
TCL1
AC Voltmeter
R21 10k R20 100 R19 10k R18 100
S15 S14 S13 S12 5% : 1% 5% : 2% 10%
Notes1. Resistor tolerance 2. Capacitor tolerance Coupling Capacitor
- 10 -
CXA2561Q
Application Circuit
R8 10k C7 0.01 C9 0.1
GND
LINEOUT2 GND GND
GND
R9 20k
C12 C14 0.47 0.1
C16 0.068
OUTREF2
PBOUT2
TAPEIN2
PBTC2
LINEOUT2
DIREF
TCH2
30 PBFB2 C4 470p RVS2 R6 180 PBRIN2 31 32 33
29 7k/12k
28
27
26
25
24
23 NR
TCL2
22
MSSW
21 20 19 MSMODE DRSW TAPESW MUTESW NRSW NRMODE MSOUT MSTC G1FB G2FB R13 100k C18 0.1 R12 1MEG To Microcomputer DVCC From Microcomputer
70/120
100k T2 BIAS MUTE TAPE EQ
GND
OFF/ B/C MS MODE 18 17 NR MODE 16 15 DET F3 MS ON/ OFF 14 13 12
GND
R4 100k R3 100k C3 470p
300k
PBGND PBFIN2
x1 F2
FWD2
GND
C5 22
34 30k 35 45k 36 30k 37 F1 38 39 40 1 2 3 300k x1 T1 LPF
VCT
PBREF C2 470p FWD1 PBFIN1
FWD/RVS VCC
GND
RVS1 C1 470p
R1 100k R5 180
PBRIN1 PBFB1
70/120
7k/12k
100k
OFF/ B/C NR 11 9 10
4
5
6
7
8
LINEOUT1
OUTREF1
PBTC1
TAPEIN1
PBOUT1
MSLPF
TCH1
TCL1
Vcc
NC
R10 3.9k
R11 39k
C6 0.01 R7 10k
C8 0.1
Vcc C10 22 GND
C11 0.47
C13 C15 0.1 0.068
C17 120p
C19 0.47
C20 4.7n
GND LINEOUT1
GND GND
GND GND
Application circuits shown are typical examples illustrating the operation of the devices. Sony cannot assume responsibility for any problems arising out of the use of these circuits or for any infringement of third party patent and other right due to same.
- 11 -
GND
R2 100k
PBGND
CXA2561Q
Description of Operation 1. Signal route The CXA2561Q signal circuit is shown in Fig. 1.
24dB NR ON PB IN FWD AMP1 300k 7k/12k MUTE OFF AMP2 MUTE ON 100k VGS VGS PBFB PBTC PBOUT TAPEIN (-30dBm) LINEOUT (-6dBm Dolby level) NR MUTE OFF NR OFF 24dB MUTE ON
RVS
Fig. 1. Signal route block diagram 2. Gain adjustment method Adjust the playback equalizer amplifier gain so that -6dBm (Dolby level) is output on LINEOUT (Pins 7 and 24) by playing back the reference tape for Dolby level adjustment. Adjustment should be performed according to the rules of Dolby Laboratories Corporation because this IC has the built-in Dolby NR system. Dolby level is defined as 200nWb/m measured according to the ANSI high efficiency head method.
0 -10 PBOUT -20 -30 VR adjustment -40 TAPEIN -50 -60 -70 -80 (dBm) PBIN (HEAD) 400Hz 200nWb/m: Dolby Level reference tape -30dBm LINEOUT -6dBm (Dolby level)
Fig. 2. Level diagram
Use the following reference tapes specified by Dolby Laboratories Corporation. 1. A-bex Laboratories, Inc. (part no. TCC-130) 2. BASF (product code 09797 XE) 3. Kaneon Corp. (LC Engineering part no. LCT-7001) 4. Standard Tape Laboratory (catalogue no. 28) 5. TEAC Corporation, Japan (part no. MTT150) 6. TEAC Corporation of America (part no. MTT150) 7. Victor Company of Japan, Ltd. (part no. TMT-6130, VTT-727) 8. Sony Corporation (part no. TY-256)
- 12 -
CXA2561Q
3. Playback equalizer amplifier
PB IN FWD AMP1 300k Ri PBFB PBREF R1 C1 0.01 PBTC PBOUT OUTREF to TAPEIN
RVS
Fig. 3. Playback equalizer amplifier block diagram The CXA2561Q configures the playback equalizer amplifier by connecting the external capacitor C1 and resister R1 shown in Fig. 3. Two systems (FORWARD and REVERSE) of playback head input are provided for each channel. The FORWARD input pin is selected when DRSW (Pin 19) is Low; REVERSE is selected when DRSW is High. The playback equalizer amplifier frequency response can be set in two levels (70s/ 120s). When TAPESW (Pin 18) is Low, Ri is 7k; when TAPESW is High, Ri is 12k. The gain can be adjusted by connecting VR between PBOUT (Pins 2 and 29) and OUTREF (Pins 3 and 28); or by using VR for the external R1.
Gain [dB] G1
T1
G1 = 20 log
-6dB/oct
R1 + 300k R1 R1 + Ri//300k R1
G2 = G3 = 20 log
T2 G2 T3 G3
T1 = C1 * (300k + Ri) T2, T3 = C1 * (R1 * 300k + 300k * Ri + Ri * R1) R1 + R2
f1
f2
f3
Frequency [Hz]
Fig. 4. Playback equalizer amplifier frequency response
- 13 -
CXA2561Q
4. Music sensor
TAPEIN2 D1 x1 D2 Vcc R2 10k R3 127k R4 100k R1 10k AMP1 AMP2 C1 64p VGS x1 Q1 R5A 29k R5B 10k R6 1k 0.775V for signal detection 0.616V for no signal detection x5 Fullwave rectifier R10 DVcc
Smoother
MSOUT AMP3
TAPEIN1
MSLPF C2
G1FB C3 R7
G2FB C4 R8
MSTC
R9
C5
Fig. 5. Music sensor block diagram (1) Adjustment of music signal detection level Adjustment the exrernal resistors R7 and R8 to adjust the music signal interval detection level. The signal detection level v1 and no signal detection level v2 are expressed by the following equations. v1 = -39 + 20log (39k/Rext) [dBm] Rext: R7 or R8 v2 = v1 - 2 [dBm] (2) Low-frequency cut-off adjustment of music sensor Adjust the external resistors R7, R8 and the external capacitors C3, C4 to adjust the low-frequency cut-off. The low-frequency cut-off is expressed by the following equation. fc1 = 1/ (2 * Cext * Rext) Cex, Rext: C3, R7 or C4, R8 (3) High-frequency cut-off adjustment of music sensor Adjust the capacitor C2 to MSLPF (Pin 10) to adjust the high-frequency cut-off. The high-frequency cut-off is expressed by the following equation. fc2 = 1/ (2 * (64p + C2) * 100k) The high-frequency cut-off is approximately 25kHz when MSLPF is left open. (4) Response time adjustment Adjust the external resistor R9 and the external capacitor C5 to adjust the response time. The response time for signal detection depends on the internal resister R6 and the external capacitor C5. The response time for no signal detection depends on the external resistor R9 and the external capacitor C5.
- 14 -
CXA2561Q
5. Operating mode control method The CXA2561Q has a Dolby NR mode select switch (NRMODE), Dolby NR switch (NRSW), mute switch (MUTE SW), playback equalizer amplifier select switch (TAPESW), head input select switch (DRSW), music sensor mode select switch (MSMODE) and music sensor switch (MSSW). The operating modes for each switch are shown in the following table. Pin No. 15 16 17 18 19 20 21 NRMODE NRSW MUTESW TAPESW DRSW MSMODE MSSW Pin name Low (OPEN) Dolby B type NR Dolby NR OFF MUTE OFF 70s PBIN FORWARD G1 MS ON Pin voltage High Dolby C type NR Dolby NR ON MUTE ON 120s PBIN REVERSE G2 MS OFF
Notes on Operation 1. DIREF pin resistance The current on DIREF (Pin 25) is the reference for the Dolby NR static characteristic, playback equalizer amplifier resistor 7k/12k and the comparator threshold value of the music sensor. Use the resistor with high accuracy for connecting to the DIREF pin. (The resistance accuracy of 2% is recommended.) 2. Dolby NR The Dolby NR attack/recovery time is determined by the capacitance connected to TCH (Pins 8 and 23), and TCL (Pin 9 and 22). Use the parts, connected to these pins, with high accuracy and small temperature characteristics. (The capacitance accuracy of 10% is recommended.) 3. Playback equalizer amplifier The playback equalizer amplifier characteristics are determined by the resistor connected between the IC internal resistor and PBFB (Pins 31 and 40) and the capacitor connected between PBFB and PBTC (Pins 1 and 30). Use the parts which satisfies the accuracy required for the playback equalizer amplifier. 4. Music sensor The resistance and capacitance connected to G2FB (Pin 11) and G1FB (Pin 12) determine the detection level and high-frequency cut-off. The response time is determined by the resistance and capacitance connected to MSTC (Pin 13). Use the parts which satisfies the accuracy required for the music sensor.
- 15 -
CXA2561Q
Example of Representative Characteristics
Supply voltage vs. Current consumption
21.0 20.8 Ta = 25C
Current consumption [mA]
20.6 20.4 20.2 20.0 19.8 No signal NR OFF MUTE OFF 70s MS ON 5.0 6.0 7.0 9.0 10.0 8.0 Supply voltage [V] 11.0 12.0
Playback equalizer amplifier frequency response
65 60 55 47 680 VCC = 8.0V Input : PBFIN1 Output : PBOUT1 300k PBFB 120s 70s 1k Frequency [Hz] 10k PBREF PBREF 270 100 0.01 7k/12k PBTC PBOUT 2.2 Ta = 25C PBFIN
Gain [dB]
50 45 40 35 30 25
Fig. 6 Measurement circuit for playback equalizer amplifier frequency response
B type decode boost characteristics
12 VCC = 8.0V 0dB = Dolby Level -40dB 20
C type decode boost characteristics
VCC = 8.0V 0dB = Dolby Level -60dB -50dB -40dB 8 4 0 -4 Ta = 25C 0dB 100 1k Frequency [Hz] 10k -10dB -30dB -20dB
Decode boost [dB]
Decode boost [dB]
10 8 6 4 Ta = 25C 2 0 100 1k Frequency [Hz] 10k -20dB -10dB 0dB -30dB
16 12
- 16 -
CXA2561Q
Total harmonic distortion (playback equalizer amplifier)
VCC = 8.0V Input : PBFIN1 Output : PBOUT1 RL = 2.7k Ta = 25C
101
Total harmonic distortion [%]
f = 10kHz 100
f = 1kHz
f = 100Hz 10-1
-24
-20
-16
-12 -8 -4 0 Output level [dBm]
4
6
B type total harmonic distortion (NR OFF included)
VCC = 8.0V Input : TAPEIN1 Output : LINEOUT1 RL = 2.7k 0dB = Dolby Level 100 Ta = 25C
C type total harmonic distortion
VCC = 8.0V Input : TAPEIN1 Output : LINEOUT1 RL = 2.7k 0dB = Dolby Level 100 Ta = 25C
NR C f = 10kHz
Total harmonic distortion [%]
Total harmonic distortion [%]
NR C f = 100Hz
10-1
NR B f = 10kHz
NR B f = 100Hz
10-1 NR C f = 1kHz
NR B f = 1kHz 10-2 NR OFF f = 1kHz 10-2
-10
-6
-2
2
6
10
14
-10
-6
-2
2
6
10
14
Output level [dBm]
Output level [dB]
- 17 -
CXA2561Q
Ripple rejection ratio (PBOUT)
-40 VCC = 8.0V RL = 2.7k Ta = 25C -25
Ripple rejection ratio (LINEOUT)
VCC = 8.0V RL = 2.7k Ta = 25C NR OFF
Ripple rejection ratio [dB]
Ripple rejection ratio [dB]
-45 -50 -55 -60 -65 100 1k Frequency [Hz] 10k
-30 -35 -40 -45 -50 -55 100 1k Frequency [Hz] 10k
NR B NR C
Crosstalk between channels (1ch 2ch)
0 -10 -20 -30 -40 -50 -60 -70 -80 -90 -100 VCC = 8.0V Input : PBFIN1 Output : LINEOUT2 (LINEOUT1 level = 0dBm) NR OFF Ta = 25C PBFIN 47 680 300k TAPEIN LINEOUT 2.2 0.1 24dB
Crosstalk [dB]
7k PBTC PBOUT PBFB PBREF PBREF 270 100 1k Frequency [Hz] 10k
Fig. 7 Measurement circuit for crosstalk between channels
Frequency response for signal and blank detection level
-0 -10 Ta = 25C VCC = 8.0V Input : TAPEIN1 G1 : R = 39k, C = 4.7nF G2 : R = 3.9k, C = 0.47F Signal detection level -30 -40 -50 -60 Blank detection level 100 1k Frequency [Hz] 10k Blank detection level Signal detection level G2 G1
Input level [dBm]
-20
- 18 -
CXA2561Q
Signal detection response time (G1)
Input TAPEIN1 f = 5kHz - 38dBm Ta = 25C 1.0
TAPEIN1 MSOUT
Signal detection response time (G2)
Input TAPEIN1 f = 5kHz - 58dBm Ta = 25C 1.0
TAPEIN1 MSOUT
Response time [ms]
Response time MSOUT 14 100k 1MEG MSTC 13 C VCC
Response time [ms]
Response time MSOUT 14 100k 1MEG MSTC 13 C
0.1
G1FB 12 39k 0.047
0.1
G2FB 11 3.9k 0.47F
0.01 0.01
0.1 MSTC capacitance [F]
1.0
0.01 0.01
0.1 MSTC capacitance [F]
1.0
Blank detection response time (G1)
Input TAPEIN1 f = 5kHz 1000
TAPEIN1 MSOUT
Signal detection response time (G2)
Input TAPEIN1 f = 5kHz 1000
TAPEIN1 MSOUT
Ta = 25C -10dBm
Ta = 25C -30dBm
Response time [ms]
Response time [ms]
Response time MSOUT 14 100k MSTC 13 G1FB 12 VCC
Response time MSOUT 14 100k MSTC 13 G2FB 11
-20dBm -30dBm
-40dBm -50dBm
100
39k 0.0047
100
3.9k 0.47F
10 0.01 0.1 MSTC time constant [s] 1.0
10 0.01 0.1 MSTC time constant [s] 1.0
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CXA2561Q
Package Outline
Unit: mm
40PIN QFP (PLASTIC)
9.0 0.4 + 0.4 7.0 - 0.1 30 21
+ 0.35 1.5 - 0.15 + 0.1 0.127 - 0.05 0.1
31
20
A
40
11
1 0.65 + 0.15 0.1 - 0.1
+ 0.15 0.3 - 0.1
10 0.12 M
0.5 0.2
(8.0)
PACKAGE STRUCTURE
PACKAGE MATERIAL LEAD TREATMENT LEAD MATERIAL PACKAGE WEIGHT EPOXY RESIN SOLDER / PALLADIUM PLATING COPPER / 42 ALLOY 0.2g
DETAIL A SONY CODE EIAJ CODE JEDEC CODE QFP-40P-L01 QFP040-P-0707
NOTE : PALLADIUM PLATING This product uses S-PdPPF (Sony Spec.-Palladium Pre-Plated Lead Frame).
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