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CXA1550P, CXA1551M/P CXA1552M/P, CXA1553M/P
Dolby B type Noise Reduction System
Description The CXA1550/CXA1551/CXA1552/CXA1553 are bipolar ICs providing two separate Dolby B type noise reduction processors. The series is composed of seven devices having four Dolby levels and two types of package for various applications. These devices feature very few external components, which is achieved by monolithic filter circuits using integrated thin film capacitors with high capacitance. Features * Pin replaceable with CXA1100 series * Minimum number of external components * NR ON/OFF/Double Speed, REC/PB switches included * Small package (16 pin SOP, 16 pin DIP) * Low current consumption 5.6mA typ. * Dual channel processors in one chip * Double speed encode and decode functions are provided. CXA1551M/CXA1552M CXA1553M 16 pin SOP (Plastic) CXA1550P/CXA1551P CXA1552P/CXA1553P 16 pin DIP (Plastic)
Absolute Maximum Ratings (Ta=25 C) * Supply voltage VCC 23 * Operating temperature Topr -40 to +85 * Storage temperature Tstg -65 to +150 * Allowable power dissipation PD
V C C
SOP16 (A1551M/A1552M/A1553M) 500 mW DIP16 (A1550P/A1551P/A1552P/A1553P) 900 mW These ICs are 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 trade marks 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--
E92315A79-TE
Block Diagram
PB IN C5 1 LINE OUT 1 R1 18k C8 2.2 TC 1 REC OUT 1 9 8 VCC/2 LINE OUT 2 TC 2 NR SW REC OUT 2 C4 1 PB IN 2 C6 2.2 C7 2.2 C9 0.1 C11 2.2 PB IN ON/OFF/x2 LINE OUT REC OUT ATT : Attenuator SC : Side Chain DET : Detector C10 0.1 IREF C12 2.2 GND PB IN 1 MODE SW REC/PB LINE OUT REC OUT
REC IN
C2 1 REC IN 1
16 10
15
14
13
12
11
ATT1
SC ATT2
DET
ATT3
C1 1
REC IN 2
C3 100
CXA1550P, CXA1551M/P, CXA1552M/P, CXA1553M/P
REC IN
VCC
VCC
--2--
ATT3 ATT2 SC ATT1 2 3 4 5 6
DET
1
7
CXA1550P, CXA1551M/P, CXA1552M/P, CXA1553M/P
Pin Description and Equivalent Circuit Pin No. Symbol Z (in) VDC (V)
(Ta=25 C, VCC=12 V, single supply, no signal) Equivalent circuit
VCC
Description
1, 16 REC IN
40 k
6.0 V
1 16 40k VCC/2 GND
Recording (encode) input pin
2
VCC
--
12.0 V
VCC
VCC power supply pin
3, 14 PB IN
40 k
6.0 V
3 14 40k VCC/2 GND
Playback (decode) input pin
4
VCT
2k
6.0 V
VCC
VCC/2 output pin
50A
50A
5
NRSW
--
--
5 50k
NR control pin H : Double speed M : NR off L : NR on
GND
VCC
200
6, 11 LINE OUT
--
6.0 V
6 11 200
Line (decode) output pin
GND
--3--
CXA1550P, CXA1551M/P, CXA1552M/P, CXA1553M/P
Pin No.
Symbol
Z (in)
VDC (V)
Equivalent circuit
VCC 4.5A 20k
Description
7, 10 TC
--
0.3 V
7 10 600k
Time constant connecting pin
GND
VCC
300
10k
8, 9
REC OUT
--
6.0 V
8 9 300
Recording (encode) output pin
GND
VCC
50A
50A
12
MODE
--
--
12 50k
REC/PB (encode/decode) control pin H : PB L : REC
GND
VCC
8k
13
IREF
--
1.2 V
13
1.2V
Active filter reference current input pin
50A GND
15
GND
--
0V
GND pin
--4--
CXA1550P, CXA1551M/P, CXA1552M/P, CXA1553M/P
Electrical Characteristics Ta=25 C, Dolby Level: -10 dBm (=245 mVrms) at RECOUT, 0 dBm=775 mVrms, VCC=15 V (CXA1550), VCC=12 V (CXA1551), VCC=9 V (CXA1552), VCC=6 V (CXA1553) unless otherwise specified
Characteristics CXA1550 Operating voltage CXA1551 CXA1552 CXA1553 CXA1550 Current consumption CXA1551 CXA1552 CXA1553 CXA1550 LINE OUT level REC IN Level PB IN Level (1) Encode characteristics (Boost) (2) (3) (4) (5) CXA1550 Signal handling CXA1551 CXA1552 CXA1553 (1) NR OFF CXA1550 CXA1551 CXA1552 CXA1553 CXA1550 CXA1551 CXA1552 CXA1553 SN (CCIR) CT-1 CT-2 CT-3 CT-4 Voff VC-R VC-P VC-ON VC-OFF VC-x2 R ON -- Rg=5 k (CCIR/ARM) THD (ON) ON THD (OFF) OFF Vomax REC OFF 1k THD=1 % CXA1551 CXA1552 CXA1553 Vrin Vpin B-R-1 B-R-2 B-R-3 B-R-4 B-R-5 REC REC REC REC REC REC REC OFF OFF ON ON ON ON ON 1k 1k 500 2k 5k 10 k 10 k -25 dB -25 dB -25 dB -40 dB 0 dB Vlout REC OFF 1k ICC REC OFF -- No signal Vopr -- -- -- Symbol Test Conditions R/P NR f (Hz) other Signal handling 12 dB Min. 11.5 8.5 6.5 5.0 3.5 3.5 3.5 3.5 -1.0 -4.0 -7.0 -11.0 -32 -32 1.4 5.5 3.9 9.7 -1.1 13.5 14.0 14.0 13.0 -- -- -- -- -- -- -- -- 65 -- -- -- -- -40 0 2.5 0 2.5 VCC-05 Typ. -- -- -- -- 5.6 5.5 5.3 5.1 0.0 -3.0 -6.0 -10.0 -30 -30 2.9 7.0 5.4 10.4 0.4 15.3 15.9 15.9 15.0 0.03 0.04 0.05 0.06 0.03 0.04 0.06 0.09 69 -82 -81 -70 -70 -- -- -- -- -- -- Max. 16.0 16.0 16.0 16.0 7.7 7.7 7.7 7.7 1.0 -2.0 -5.0 -9.0 -28 -28 4.4 8.5 6.9 11.9 1.9 -- -- -- -- 0.2 0.2 0.2 0.2 0.3 0.3 0.3 0.3 -- -65 -60 -60 -60 40 0.5 VCC 0.5 VCC-2.5 VCC Unit V V V V mA mA mA mA dBm dBm dBm dBm dBm dBm dB dB dB dB dB dB dB dB dB % % % % % % % % dB dB dB dB dB mV V V V V V
Total harmonic distortion
Encode S/N ratio REC-PB Crosstalk PB-REC REC ch to ch PB ch to ch REC OUT offset voltage (NR ON-OFF) REC Control voltage PB ON OFF x2
0 dB means the level which provides the Dolby level at the recording output in the noise reduction off mode. --5--
(2) NR ON
Test Circuit
15V
R7 11k
R10 1.5k
R12 510
S4 R5 5.1k C12 4.7 S7
R2 5.1k S2 C2 1 C5 1 RB 18k C10 0.1 C8 4.7
16 GND PB IN 1 IREF MODE SW TC 1 REC OUT 1
15
14
13
12
11
10 9
S6
R14 10k
REC IN 1
DC Level Meter
Audio SG
CXA1550P
LINE OUT 1
REC IN 2
VCC
PB IN 2
VCC/2
NR SW
LINE OUT 2
TC 2
1
2
3
4
5
6
7
8 AC Level Meter
VCC C1 1 C6 2.2 C3 100 C4 1
A C7 4.7 C9 0.1 C11 4.7 S5 S1 R4 5.1k S3
REC OUT 2
--6--
R3 510 R6 1.5k R9 9.1k R11 1.5k R13 510
S8
CCIR/ARM Filter
S9
R1 5.1k
Distortion Analyzer
CXA1550P, CXA1551M/P, CXA1552M/P, CXA1553M/P
15V
CXA1550P, CXA1551M/P, CXA1552M/P, CXA1553M/P
Switchable Processor with Single Supply
C3 10
REC/PB REC PB C12/1 C11 1 R2 10k R1 (2%) 18k 16 15 14 13 12
C14 2.2 LINE OUT C15 C13 (10%)2.2 0.1 REC OUT (-10dBm)
PB IN (-30dBm) REC IN (-30dBm)
RT
11
10
9
VCC RT 1 2 3 4 C1 22 5 6 7 8
C25 2.2
REC IN (-30dBm) PB IN (-30dBm)
C2 100 C21/1
C23 (10%) 0.1 C24 2.2
REC OUT (-10dBm) LINE OUT
NR SW C22/1 x2 OFF ON
Note) 1. Resistor and capacitor tolerances are 10 % and 20 % respectively unless otherwise specified. 2. When resistors RT are connected to Pin 4 for the MPX filter termination, increase the capacitances of C1 and C11 (C21) to 470 F and 4.7 F respectively. Switching Processor with Split Power Supply
REC/PB R2 10k C3 100 R1 (2%) 18k 15 14 13 12 11 10 C14 2.2 LINE OUT C13 (10%) 0.1 C15 2.2 REC OUT (-10dBm)
PB REC PB IN (-30dBm) REC IN (-30dBm) VEE
C12 1 C11 1
C1 100
16
9
C2 100
1
2
3
4
5
6
7
8
C25 2.2
VCC REC IN (-30dBm) PB IN (-30dBm)
C21 1 C22 1 NR SW x2 OFF ON
C23 (10%) 0.1 C24 2.2
REC OUT (-10dBm) LINE OUT
Note) Resistor and capacitor tolerances are 10 % and 20 % respectively unless otherwise specified. --7--
CXA1550P, CXA1551M/P, CXA1552M/P, CXA1553M/P
Playback Processor with AUX input
TAPE IN (-30dBm) AUX IN (-30dBm)
TAPE/AUX AUX R2 TAPE 10k C12 1 C11 1 16 R1 (2%) 18k 15 14 13 12
C3 10
C14 2.2 LINE OUT C13 (10%) 0.1 11 10 9
VCC 1 2 3 4 C1 22 5 6 7 8 C13 (10%) 0.1 C24 2.2 LINE OUT NR SW x2 OFF ON
AUX IN (-30dBm) TAPE IN (-30dBm)
C21 1 C22 1
C2 100
Note) 1. Resistor and capacitor tolerances are 10 % and 20 % respectively unless otherwise specified. 2. When the AUX input is unnecessary, remove R2, C3, C11, C21 and TAPE/AUX control switch and connect Pin 12 to VCC.
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.
--8--
CXA1550P, CXA1551M/P, CXA1552M/P, CXA1553M/P
Notes on Applications 1) Power supply The CXA1550 series is designed to operate on either single or split power supply. The ripple rejection performance is excellent for either supply. VCT (Pin 4) is a reference voltage of the VCC/2 buffer amplifier. With single power supply operation, internally generated VCC/2 voltage appears at the pin, and a bypass capacitor has to be connected between the pin and ground. On split power supply operation, the VCT (Pin 4) pin has to be connected to ground, and VEE (negative power supply) is supplied to the GND (Pin 15) pin. 2) Double speed (x2) The CXA1550 series provides double speed encode/decode modes, which offer high speed dubbing function. On double speed mode, the frequency response shifts twice as the normal B type. 3) Operational mode control The CXA1550 series provides fully electronic switching circuits. The functions are controlled by DC voltage of the two control pins of REC/PB (Pin 12) and ON/OFF/x2 (Pin 5). The switching truth tables are shown in Table 1. Pin Pin 12 Function PB (Decode) REC (Encode) NR x 2 NR OFF NR ON Single Supply VCC V 2.5 V 0.5 V V 0 V VCC V VCC-0.5 V VCC-2.5 V 2.5 V 0.5 V V 0 V Table 1. It is desirable to provide CR time constant circuits at the mode control pins with time constant from 100 msec to 1 sec, which will reduce switching clicks effectively. 4) Reference levels Characteristics and specifications of the Dolby noise reduction processor are defined as the levels and measured with reference to the Dolby level. This particular level in these devices is -10 dBm (245 mVrms), and is measured at the recording output (REC OUT) in the NR off mode. The reference levels of the recording input (REC IN), playback input (PB IN) and line output (LINE OUT) are defined as the levels which provide the Dolby level at the recording output in the NR off mode. The CXA1550 series has a common silicon die, and has different internal connection (AL pattern). The series provides four different line output levels for various applications. Other reference levels, recording input level, playback input level and recording output level (=Dolby level) are identical in all devices. The reference levels are as follows Recording output level (=Dolby level) Recording input level Playback input level Line output level CXA1550 CXA1551 CXA1552 CXA1553 Split Supply VCC V VEE+2.5 V VEE+0.5 V V VEE VCC V VCC-0.5 V VCC-2.5 V V VEE+2.5 V VEE+0.5 V V VEE
Pin 5
-10 dBm -30 dBm -30 dBm 0 dBm -3 dBm -6 dBm -10 dBm --9--
(245 mVrms) (24.5 mVrms) (24.5 mVrms) (775 mVrms) (548 mVrms) (388 mVrms) (245 mVrms)
CXA1550P, CXA1551M/P, CXA1552M/P, CXA1553M/P
5) MPX filter termination and C1 for VCC/2 (Pin 4) The MPX (multiplex) filter termination method shown in Fig. 1 allows saving the coupling capacitors between the buffer amplifiers and MPX filters. However, the channel to channel separation and REC to PB crosstalk of low frequency signals will be degraded by the termination resistor RT. For example, 5 k of R1 will degrade the channel to channel separation to 50 dB. Better separation can be obtained by increasing the capacitance of C1 (Pin 4) to 220 F or 470 F. The allowable minimum value of C1 is 47 F, and 100 F is the standard recommended value. Larger values of C1 are generally desirable in order to improve the crosstalk and ripple rejection ratio. 6) Application for dubbing cassette decks The CXA1550 series generates non decoded signal at the recoding output in the playback (decode) mode, and can simplify the structure of dubbing decks. See the Sony' Dolby B/C type IC (CX20187/CXA1097Q or CX20188/CXA1098Q) data sheet in detail.
Line Input
Buffer
MPX Filter
C11 4.7
RT
16
15
14
13
CXA1550 Series RT Line Input Buffer MPX Filter
1
2
3
4
C21 4.7
C1 470
Fig. 1
--10--
CXA1550P, CXA1551M/P, CXA1552M/P, CXA1553M/P
Example of Representative Characteristics
Quiescent current consumption vs. Supply voltage ICC - Quiescent current consumption (mA) Encode Mode ICC - Current consumption (mA) 7 Current consumption vs. Input level (CXA1552) Encode Mode VCC=9V 0dB=Dolby level
6
NR OFF
NR ON NR x 2 5
6
NR ON 10kHz NR OFF NR x 2 10kHz NR ON 1kHz NR x 2 1kHz
5
4 5 10 15 20 -12 -8 -4 0 4 8 12
VCC - Supply Voltage (V) NR ON encode characteristics 12 10 -40dB Encode boost (dB) Encode boost (dB) 8 6 4 2 0 0dB 200 500 1k 2k 5k 10k 20k 500 1k -20dB -10dB -30dB 8 6 4 2 0 VCC=9V 0dB=Dolby level 12 -50dB 10
Input level (dB) Double speed encode boost VCC=9V 0dB=Dolby level
-50dB -40dB -30dB
-20dB -10dB 0dB 2k 5k 10k 20k 50k
Frequency (Hz) Signal handling Encode Mode A1553 A1552 NR OFF f=1kHz THD=1% A1551 10 Maximum output level (dB) 8
Frequency (Hz) Load characteristics (CXA1552) LINE OUT
20 18 Signal handling (dB)
A1550 16 14 12 10 0 4 6 8 10 12 14 16 18 20 22
REC OUT 6 4 2 0 -2 200 500 1k 2k Encode Mode VCC=9V THD=1% 0dB=0.775Vrms 5k 10k 20k
VCC - Supply voltage (V)
RL - Load resistance ()
--11--
CXA1550P, CXA1551M/P, CXA1552M/P, CXA1553M/P
NR OFF total harmonic distortion -1 (CXA1551) Encode Mode VCC=12V 0dB=Dolby level Total harmonic distortion (%)
NR ON total harmonic distortion -1 (CXA1551) Encode Mode VCC=12V 0dB=Dolby level
1.0 Total harmonic distortion (%) 0.5
1.0 0.5
0.2 0.1 0.05 f=10kHz f=100Hz f=1kHz -8 -4 0 4 8 12 16 Output level (dB) Double speed total harmonic distortion -1 (CXA1551) Encode Mode VCC=12V 0dB=Dolby level
0.2 0.1 f=100Hz 0.05 f=10kHz f=1kHz
0.02 0.01
0.02 0.01 -8 -4 0 4 8 12
16
Output level (dB) NR OFF total harmonic distortion -2 (CXA1550) Encode Mode 0dB=Dolby level f=1kHz VCC=11.5V 0.2 0.1 VCC=15V 0.05
1.0 Total harmonic distortion (%) 0.5
1.0 Total harmonic distortion (%) 16 0.5
0.2 0.1 0.05 f=10kHz
f=100Hz f=1kHz
0.02 0.01 -8 -4 0 4 8 12
0.02 0.01 -8 -4 0 4 8 12 16
Output level (dB) NR ON total harmonic distortion -2 (CXA1550) Encode Mode 0dB=Dolby level f=1kHz Total harmonic distortion (%)
Output level (dB) Double speed total harmonic distortion -2 (CXA1550) Encode Mode 0dB=Dolby level f=1kHz
1.0 Total harmonic distortion (%) 0.5
1.0 0.5
VCC=11.5V 0.2 0.1 0.05 VCC=15V 0.02 0.01 -8 -4 0 4 8 12 16
0.2 0.1 VCC=11.5V 0.05 VCC=15V
0.02 0.01 -8 -4 0 4 8
12
16
Output level (dB)
Output level (dB)
--12--
CXA1550P, CXA1551M/P, CXA1552M/P, CXA1553M/P
NR OFF total harmonic distortion -3 (CXA1551) Encode Mode 0dB=Dolby level f=1kHz VCC=12V
NR ON total harmonic distortion -3 (CXA1551) Encode Mode 0dB=Dolby level f=1kHz VCC=8.5V 0.2 0.1 0.05 VCC=15V VCC=12V
1.0 Total harmonic distortion (%) 0.5
1.0 Total harmonic distortion (%) 0.5
VCC=8.5V 0.2 0.1 0.05
0.02 0.01 -8 -4 0 4 8 12 VCC=15V 16 Output level (dB) Double speed total harmonic distortion -3 (CXA1551) Encode Mode 0dB=Dolby level f=1kHz VCC=8.5V 0.2 0.1 0.05 VCC=15V VCC=12V
0.02 0.01 -8 -4 0 4 8 12
16
Output level (dB) NR OFF total harmonic distortion -4 (CXA1552) Encode Mode 0dB=Dolby level f=1kHz VCC=9V
1.0 Total harmonic distortion (%) 0.5
1.0 Total harmonic distortion (%) 0.5
VCC=6.5V 0.2 0.1 0.05
0.02 0.01 -8 -4 0 4 8 12
0.02 0.01 VCC=15V -4 0 4 8 12 16 20
16
Output level (dB) NR ON total harmonic distortion -4 (CXA1552) Encode Mode 0dB=Dolby level f=1kHz VCC=6.5V 0.2 0.1 0.05 VCC=15V 0.02 0.01 -4 0 4 8 12 16 20 VCC=9V 1.0 Total harmonic distortion (%) 0.5
Output level (dB) Double speed total harmonic distortion -4 (CXA1552) Encode Mode 0dB=Dolby level f=1kHz VCC=6.5V 0.2 0.1 0.05 VCC=15V 0.02 0.01 -4 0 4 8 12 16 20 VCC=9V
1.0 Total harmonic distortion (%) 0.5
Output level (dB)
Output level (dB)
--13--
CXA1550P, CXA1551M/P, CXA1552M/P, CXA1553M/P
NR OFF total harmonic distortion -5 (CXA1553) Encode Mode 0dB=Dolby level f=1kHz Total harmonic distortion (%) VCC=5V 0.2 VCC=6V 0.1 0.05
NR ON total harmonic distortion -5 (CXA1553) VCC=5V 1.0 VCC=6V 0.5
1.0 Total harmonic distortion (%) 0.5
0.2 0.1 0.05 VCC=15V
0.02 VCC=15V 0.01 0 4 8 12 16 20 24
0.02 0.01 0 4 8 12
Encode Mode 0dB=Dolby level f=1kHz 16 20 24
Output level (dB)
Output level (dB)
Double speed total harmonic distortion -5 (CXA1553)
Crosstalk (CXA1552) VCC=9V NR OFF Refer to Dolby Level
1.0 VCC=5V Total harmonic distortion (%) 0.5 VCC=6V 0.2 0.1 0.05 VCC=15V 0.02 0.01 0 4 8 12 Encode Mode 0dB=Dolby level f=1kHz 16 20 24 Crosstalk (dB)
-40 -50 -60 -70 -80 -90 -100
REC to PB PB to REC CH to CH 500 1k 2k 5k 10k 20k Frequency (Hz)
Output level (dB)
--14--
CXA1550P, CXA1551M/P, CXA1552M/P, CXA1553M/P
Package Outline
Unit : mm
CXA1551M, CXA1552M CXA1553M
16PIN SOP (PLASTIC)
+ 0.4 9.9 - 0.1
+ 0.4 1.85 - 0.15
16
9 0.15 + 0.2 0.1 - 0.05
+ 0.3 5.3 - 0.1
7.9 0.4
0.45 0.1
1.27
+ 0.1 0.2 - 0.05
0.24 M
PACKAGE STRUCTURE
PACKAGE MATERIAL SONY CODE EIAJ CODE JEDEC CODE PACKAGE MASS SOP-16P-L01 SOP016-P-0300 LEAD MATERIAL COPPER ALLOY 0.2g LEAD TREATMENT EPOXY RESIN SOLDER PLATING
--15--
0.5 0.2
1
8
6.9
CXA1550P, CXA1551M/P, CXA1552M/P, CXA1553M/P
Package Outline
Unit : mm
16PIN DIP (PLASTIC)
+ 0.1 0.05 0.25 -
0 to 15
EPOXY RESIN SOLDER PLATING COPPER ALLOY 1.0 g
CXA1550P, CXA1551P CXA1552P, CXA1553P
+ 0.4 19.2 - 0.1
16
9
1 2.54
8
+ 0.4 3.7 - 0.1
0.5 MIN
0.5 0.1 1.2 0.15
3.0 MIN
PACKAGE STRUCTURE
PACKAGE MATERIAL SONY CODE EIAJ CODE JEDEC CODE DIP-16P-01 DIP016-P-0300 Similar to MO-001-AE LEAD TREATMENT LEAD MATERIAL PACKAGE MASS
16PIN DIP (PLASTIC) 300mil
+ 0.1 0.05 0.25 -
0 to 15
EPOXY RESIN SOLDER PLATING COPPER / 42 ALLOY 1.0g
16
9
1 2.54
8
0.5 MIN
0.46 0.1 1.53 0.15
3.0 MIN
+ 0.4 3.7 - 0.1
PACKAGE STRUCTURE
PACKAGE MATERIAL SONY CODE EIAJ CODE JEDEC CODE DIP-16P-03 DIP016-P-0300-B Similar to MO-001-AE LEAD TREATMENT LEAD MATERIAL PACKAGE WEIGHT
--16--
7.62
+ 0.3 6.4 - 0.1
+ 0.4 19.1 - 0.1
7.62
Two kinds of package surface: 1.All mat surface type. 2.All mirror surface type.
+ 0.3 6.4 - 0.1

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