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 —2— REC IN 1 C1 1µ REC IN 2 REC IN 1 16 VCC 2 15 GND ATT2 ATT2 C3 100µ VCC C4 1µ PB IN 3 14 C5 1µ PB IN 1 PB IN 2 C2 1µ 4 C6 2.2µ ATT1 ATT3 ATT3 ATT1 13 R1 18k IREF VCC/2 SC SC ON/OFF/×2 5 12 6 11 C7 2.2µ LINE OUT C8 2.2µ LINE OUT LINE OUT 1 LINE OUT 2 REC/PB 7 DET DET 10 C10 0.1µ TC 1 C9 0.1µ TC 2 PB IN C11 2.2µ REC OUT 8 9 C12 2.2µ REC OUT REC OUT 1 REC OUT 2 REC IN MODE SW NR SW Block Diagram ATT : Attenuator SC : Side Chain DET : Detector CXA1550P, CXA1551M/P, CXA1552M/P, CXA1553M/P CXA1550P, CXA1551M/P, CXA1552M/P, CXA1553M/P Pin Description and Equivalent Circuit Pin No. Symbol Z (in) (Ta=25 °C, VCC=12 V, single supply, no signal) VDC (V) Equivalent circuit Description VCC 1, 16 REC IN 40 k 6.0 V 1 16 Recording (encode) input pin 40k VCC/2 GND 2 VCC — 12.0 V VCC power supply pin VCC 3, 14 PB IN 40 k 6.0 V 3 14 Playback (decode) input pin 40k VCC/2 GND 4 VCT 2k 6.0 V VCC/2 output pin VCC 50µA 5 NRSW — — 50µA 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 Line (decode) output pin 200 GND —3— CXA1550P, CXA1551M/P, CXA1552M/P, CXA1553M/P Pin No. Symbol Z (in) VDC (V) Equivalent circuit Description VCC 4.5µA 20k 7, 10 TC — 0.3 V 7 10 Time constant connecting pin 600k GND VCC 300 8, 9 REC OUT — 6.0 V 10k 8 Recording (encode) output pin 300 9 GND VCC 50µA 12 MODE — — 50µA 12 50k REC/PB (encode/decode) control pin H : PB L : REC GND VCC 8k 13 IREF — 1.2 V 1.2V 13 Active filter reference current input pin 50µA 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 Test Conditions Min. Typ. Max. Unit 11.5 — 16.0 V 8.5 — 16.0 V 6.5 — 16.0 V 5.0 — 16.0 V 3.5 5.6 7.7 mA 3.5 5.5 7.7 mA 3.5 5.3 7.7 mA CXA1553 3.5 5.1 7.7 mA CXA1550 –1.0 0.0 1.0 dBm –4.0 –3.0 –2.0 dBm –7.0 –6.0 –5.0 dBm –11.0 –10.0 –9.0 dBm –32 –30 –28 dBm Characteristics Symbol R/P NR f (Hz) CXA1550 Operating CXA1551 voltage CXA1552 other Signal Vopr — — — handling ≥12 dB CXA1553 CXA1550 Current CXA1551 consumption CXA1552 LINE OUT CXA1551 level CXA1552 ICC Vlout REC REC OFF OFF — No signal 1k CXA1553 REC IN Level Vrin REC OFF 1k Vpin REC OFF 1k –32 –30 –28 dBm (1) B-R-1 REC ON 500 –25 dB 1.4 2.9 4.4 dB Encode (2) B-R-2 REC ON 2k –25 dB 5.5 7.0 8.5 dB characteristics (3) B-R-3 REC ON 5k –25 dB 3.9 5.4 6.9 dB (Boost) (4) B-R-4 REC ON 10 k –40 dB 9.7 10.4 11.9 dB (5) B-R-5 REC ON 10 k 0 dB –1.1 0.4 1.9 dB CXA1550 13.5 15.3 — dB Signal CXA1551 14.0 15.9 — dB handling CXA1552 15.9 — dB 15.0 — dB CXA1550 — 0.03 0.2 % — 0.04 0.2 % CXA1550 CXA1551 THD CXA1552 (OFF) OFF CXA1553 CXA1551 THD CXA1552 (ON) ON CXA1553 SN (CCIR) R ON — Rg=5 kΩ (CCIR/ARM) — 0.05 0.2 % — 0.06 0.2 % — 0.03 0.3 % — 0.04 0.3 % — 0.06 0.3 % — 0.09 0.3 % 65 69 — dB REC-PB CT-1 — –82 –65 dB PB-REC CT-2 — –81 –60 dB REC ch to ch CT-3 — –70 –60 dB PB ch to ch CT-4 — –70 –60 dB Voff –40 — 40 mV (NR ON-OFF) voltage THD=1 % 13.0 REC OUT offset voltage Control 1k 14.0 Encode S/N ratio Crosstalk OFF CXA1553 harmonic distortion REC (1) NR OFF Total Vomax (2) NR ON PB IN Level REC VC-R 0 — 0.5 V PB VC-P 2.5 — VCC V ON VC-ON 0 — 0.5 V OFF VC-OFF 2.5 — VCC–2.5 V ×2 VC-×2 VCC–05 — VCC V ∗ 0 dB means the level which provides the Dolby level at the recording output in the noise reduction off mode. —5— 15V VCC A C4 1µ R4 5.1k C3 100µ S1 R1 5.1k R3 510 3 C1 1µ 2 1 C6 2.2µ R6 1.5k 4 S3 R9 9.1k 5 R11 1.5k 6 C7 4.7µ R13 510 7 C9 0.1µ REC IN 1 CXA1550P 9 10 11 12 13 C10 0.1µ 14 RB 18k C8 4.7µ 15 C5 1µ R5 5.1k R12 510 16 C2 1µ S2 S4 R10 1.5k GND VCC/2 Audio SG R2 5.1k R7 11k PB IN 1 TC 2 15V IREF REC IN 2 MODE SW NR SW —6— VCC LINE OUT 1 PB IN 2 TC 1 LINE OUT 2 REC OUT 1 8 REC OUT 2 Test Circuit C11 4.7µ C12 4.7µ S5 S6 S7 S8 R14 10k S9 Distortion Analyzer AC Level Meter CCIR/ARM Filter DC Level Meter CXA1550P, CXA1551M/P, CXA1552M/P, CXA1553M/P CXA1550P, CXA1551M/P, CXA1552M/P, CXA1553M/P Switchable Processor with Single Supply C3 10µ REC/PB REC PB PB IN (–30dBm) REC IN (–30dBm) C12/1µ C11 1µ C14 2.2µ R2 10k LINE OUT C15 C13 (10%)2.2µ 0.1µ R1 (2%) 18k ∗ RT 16 15 14 13 12 11 10 9 1 2 3 4 5 6 7 8 REC OUT (–10dBm) VCC ∗ RT REC IN (–30dBm) ∗ C1 22µ C2 100µ C25 2.2µ C23 (10%) 0.1µ REC OUT (–10dBm) LINE OUT C21/1µ PB IN (–30dBm) C24 2.2µ NR SW C22/1µ ×2 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 µF and 4.7 µF respectively. Switching Processor with Split Power Supply REC/PB PB REC PB IN (–30dBm) REC IN (–30dBm) VEE C1 100µ C2 100µ VCC REC IN (–30dBm) PB IN (–30dBm) R2 10k C12 1µ C3 100µ C11 1µ R1 (2%) 18k C14 2.2µ LINE OUT C13 (10%) 0.1µ 16 15 14 13 12 11 10 9 1 2 3 4 5 6 7 8 C21 1µ C22 1µ C15 2.2µ C25 2.2µ C23 (10%) 0.1µ NR SW ×2 ON REC OUT (–10dBm) REC OUT (–10dBm) LINE OUT C24 2.2µ OFF 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 1µ C14 2.2µ ∗ C3 10µ LINE OUT R1 (2%) 18k C13 (10%) 0.1µ ∗ C11 1µ 16 15 14 13 12 11 10 9 1 2 3 4 5 6 7 8 VCC AUX IN (–30dBm) TAPE IN (–30dBm) C21 1µ C2 100µ C13 (10%) 0.1µ C24 2.2µ C1 22µ LINE OUT NR SW C22 ∗ 1µ ×2 OFF ON 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 (×2) 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/×2 (Pin 5). The switching truth tables are shown in Table 1. Pin Pin 12 Pin 5 Function PB (Decode) REC (Encode) NR × 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 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 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 –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 kΩ 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 µF or 470 µF. The allowable minimum value of C1 is 47 µF, and 100 µF 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 4.7µ RT 16 15 14 13 CXA1550 Series RT Line Input Buffer MPX Filter C21 4.7µ 1 2 3 4 C1 470µ Fig. 1 —10— CXA1550P, CXA1551M/P, CXA1552M/P, CXA1553M/P Example of Representative Characteristics Current consumption vs. Input level (CXA1552) Encode Mode 6 7 ICC – Current consumption (mA) ICC – Quiescent current consumption (mA) Quiescent current consumption vs. Supply voltage NR OFF NR ON NR × 2 5 Encode Mode VCC=9V 0dB=Dolby level NR ON 10kHz 6 NR OFF NR × 2 10kHz NR ON 1kHz NR × 2 1kHz 5 4 5 10 15 –12 20 –8 –4 VCC – Supply Voltage (V) VCC=9V 0dB=Dolby level 4 8 12 –50dB VCC=9V 0dB=Dolby level –50dB 10 10 8 –30dB 6 4 –20dB 2 –10dB –40dB Encode boost (dB) –40dB Encode boost (dB) 12 Double speed encode boost NR ON encode characteristics 12 0 Input level (dB) 0 8 –30dB 6 4 –20dB 2 –10dB 0 0dB 0dB 20 500 1k 2k 5k 10k 20k A1551 10k 20k 14 12 LINE OUT 8 REC OUT 6 4 2 10 0 0 –2 10 12 14 16 18 50k 10 16 8 5k Load characteristics (CXA1552) A1550 6 2k Signal handling Encode Mode A1553 A1552 NR OFF f=1kHz THD=1% 4 1k Frequency (Hz) 18 Signal handling (dB) 500 Frequency (Hz) Maximum output level (dB) 200 Encode Mode VCC=9V THD=1% 0dB=0.775Vrms 200 20 22 VCC – Supply voltage (V) 500 1k 2k 5k RL – Load resistance (Ω) —11— 10k 20k CXA1550P, CXA1551M/P, CXA1552M/P, CXA1553M/P NR OFF total harmonic distortion –1 (CXA1551) Encode Mode VCC=12V 0dB=Dolby level Total harmonic distortion (%) 0.5 0.2 0.1 0.05 f=10kHz 0.02 f=100Hz f=1kHz 0.01 –8 –4 0 4 0.5 0.2 0.1 f=100Hz 0.05 f=10kHz f=1kHz 0.02 0.01 8 12 16 –8 –4 0 4 8 12 16 Output level (dB) Double speed total harmonic distortion –1 (CXA1551) NR OFF total harmonic distortion –2 (CXA1550) Encode Mode VCC=12V 0dB=Dolby level 1.0 0.5 0.2 0.1 f=10kHz f=100Hz 0.05 f=1kHz 0.02 0.01 1.0 Encode Mode 0dB=Dolby level f=1kHz 0.5 VCC=11.5V 0.2 0.1 VCC=15V 0.05 0.02 0.01 –8 –4 0 4 8 12 16 –8 –4 0 4 8 12 16 Output level (dB) Output level (dB) NR ON total harmonic distortion –2 (CXA1550) Double speed total harmonic distortion –2 (CXA1550) Encode Mode 0dB=Dolby level f=1kHz 1.0 0.5 Total harmonic distortion (%) Total harmonic distortion (%) Encode Mode VCC=12V 0dB=Dolby level Output level (dB) 1.0 Total harmonic distortion (%) 1.0 Total harmonic distortion (%) Total harmonic distortion (%) 1.0 NR ON total harmonic distortion –1 (CXA1551) VCC=11.5V 0.2 0.1 0.05 VCC=15V 0.02 0.01 Encode Mode 0dB=Dolby level f=1kHz 0.5 0.2 0.1 VCC=11.5V 0.05 VCC=15V 0.02 0.01 –8 –4 0 4 8 12 16 –8 Output level (dB) –4 0 4 8 Output level (dB) —12— 12 16 CXA1550P, CXA1551M/P, CXA1552M/P, CXA1553M/P NR OFF total harmonic distortion –3 (CXA1551) Encode Mode 0dB=Dolby level f=1kHz VCC=12V Total harmonic distortion (%) 0.5 VCC=8.5V 0.2 0.1 0.05 0.02 0.01 –4 0 4 8 12 VCC=12V 0.5 VCC=8.5V 0.2 0.1 0.05 VCC=15V 0.02 16 –8 –4 0 4 8 12 16 Output level (dB) Output level (dB) Double speed total harmonic distortion –3 (CXA1551) NR OFF total harmonic distortion –4 (CXA1552) 1.0 Encode Mode 0dB=Dolby level f=1kHz VCC=12V 1.0 0.5 VCC=8.5V 0.2 0.1 0.05 VCC=15V 0.02 0.01 1.0 Encode Mode 0dB=Dolby level f=1kHz VCC=9V 0.5 VCC=6.5V 0.2 0.1 0.05 0.02 0.01 –8 –4 0 4 8 12 16 VCC=15V –4 0 4 8 12 16 20 Output level (dB) Output level (dB) NR ON total harmonic distortion –4 (CXA1552) Double speed total harmonic distortion –4 (CXA1552) VCC=9V Encode Mode 0dB=Dolby level f=1kHz 1.0 0.5 Total harmonic distortion (%) Total harmonic distortion (%) Encode Mode 0dB=Dolby level f=1kHz 0.01 VCC=15V –8 Total harmonic distortion (%) 1.0 Total harmonic distortion (%) Total harmonic distortion (%) 1.0 NR ON total harmonic distortion –3 (CXA1551) VCC=6.5V 0.2 0.1 0.05 VCC=15V 0.02 0.01 VCC=9V Encode Mode 0dB=Dolby level f=1kHz 0.5 VCC=6.5V 0.2 0.1 0.05 VCC=15V 0.02 0.01 –4 0 4 8 12 16 20 –4 Output level (dB) 0 4 8 12 Output level (dB) —13— 16 20 CXA1550P, CXA1551M/P, CXA1552M/P, CXA1553M/P NR OFF total harmonic distortion –5 (CXA1553) VCC=5V Encode Mode 0dB=Dolby level f=1kHz 1.0 Total harmonic distortion (%) Total harmonic distortion (%) 1.0 NR ON total harmonic distortion –5 (CXA1553) 0.5 VCC=5V 0.2 VCC=6V 0.1 0.05 0.02 VCC=6V 0.5 0.2 0.1 VCC=15V 0.05 0.02 Encode Mode 0dB=Dolby level f=1kHz VCC=15V 0.01 0.01 0 4 8 12 16 20 24 0 8 12 16 20 Output level (dB) Double speed total harmonic distortion –5 (CXA1553) Crosstalk (CXA1552) 1.0 –40 VCC=5V 0.5 24 VCC=9V NR OFF Refer to Dolby Level –50 VCC=6V Crosstalk (dB) Total harmonic distortion (%) 4 Output level (dB) 0.2 0.1 0.05 –60 –70 –80 VCC=15V 0.02 –90 Encode Mode 0dB=Dolby level f=1kHz 0.01 0 4 8 12 16 20 REC to PB PB to REC CH to CH –100 24 500 Output level (dB) 1k 2k 5k Frequency (Hz) —14— 10k 20k CXA1550P, CXA1551M/P, CXA1552M/P, CXA1553M/P Package Outline Unit : mm CXA1551M, CXA1552M CXA1553M 16PIN SOP (PLASTIC) + 0.4 1.85 – 0.15 + 0.4 9.9 – 0.1 16 9 6.9 + 0.2 0.1 – 0.05 8 + 0.1 0.2 – 0.05 1.27 0.45 ± 0.1 0.5 ± 0.2 1 7.9 ± 0.4 + 0.3 5.3 – 0.1 0.15 0.24 M PACKAGE STRUCTURE PACKAGE MATERIAL SONY CODE SOP-16P-L01 EIAJ CODE SOP016-P-0300 EPOXY RESIN LEAD TREATMENT SOLDER PLATING LEAD MATERIAL COPPER ALLOY PACKAGE MASS 0.2g JEDEC CODE —15— CXA1550P, CXA1551M/P, CXA1552M/P, CXA1553M/P Unit : mm CXA1550P, CXA1551P CXA1552P, CXA1553P + 0.3 6.4 – 0.1 + 0.4 19.2 – 0.1 + 0.1 0.05 0.25 – 16PIN DIP (PLASTIC) 16 7.62 9 1 0° to 15° 8 Two kinds of package surface: 1.All mat surface type. 2.All mirror surface type. 3.0 MIN 0.5 MIN + 0.4 3.7 – 0.1 2.54 0.5 ± 0.1 1.2 ± 0.15 PACKAGE STRUCTURE PACKAGE MATERIAL EPOXY RESIN DIP-16P-01 LEAD TREATMENT SOLDER PLATING EIAJ CODE DIP016-P-0300 LEAD MATERIAL COPPER ALLOY JEDEC CODE Similar to MO-001-AE PACKAGE MASS 1.0 g SONY CODE 9 7.62 16 + 0.3 6.4 – 0.1 + 0.4 19.1 – 0.1 + 0.1 0.05 0.25 – 16PIN DIP (PLASTIC) 300mil 0° to 15° 8 1 0.46 ± 0.1 3.0 MIN 0.5 MIN 2.54 + 0.4 3.7 – 0.1 Package Outline 1.53 ± 0.15 PACKAGE STRUCTURE PACKAGE MATERIAL EPOXY RESIN DIP-16P-03 LEAD TREATMENT SOLDER PLATING EIAJ CODE ∗DIP016-P-0300-B LEAD MATERIAL COPPER / 42 ALLOY JEDEC CODE Similar to MO-001-AE PACKAGE WEIGHT 1.0g SONY CODE —16—