CXA1518Q/S EIAJ Sound Multiplexing Decoder Description The CXA1518Q/S are bipolar ICs designed for EIAJ TV sound multiplexing decoders. These ICs provide various functions including sound multiplexing demodulation, broadcast mode discrimination (stereo/bilingual discrimination display), mode display, and muting. Features • External parts greatly reduced with a built-in active filter. • Count down can be used for broadcast mode discrimination so that adjustment for discrimination system (Q-OSC) is not required. • Output level of 380 mVrms (1 kHz, MONO, 100 %) • Forced monaural operates with both stereo and bilingual broadcasts. • Built-in digital facsimile interference elimination filter. • Low supply voltage (VCC=5 V) • The pin configuration of the CXA1518S is identical to that of the CXA1138AS. Applications • Color TVs • Hi-Fi VCRs • Liquid crystal TVs CXA1518Q 32 pin QFP (Plastic) CXA1518S 22 pin SDIP (Plastic) Absolute Maximum Ratings (Ta=25 °C) [Pin numbers shown are for the CXA1518S.] • Supply voltage VCC 10 • Input signal (Pin 6) VIS 0.6 • Control voltage (Pins 12, 13, 14) VIC VCC • Operating temperature Topr • Storage temperature Tstg • Allowable power dissipation PD Iled Vp-p –20 to +75 –65 to +150 900 470 • LED drive current V 10 V °C °C mW (SDIP) mW (QFP) mA Operating Voltage 6.0 to 4.5 V Structure Bipolar silicon monolithic IC 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— E92604A79-TE NC MCIN NC LOUT NC ROUT MOUT Block Diagram CXA1518Q MCOUT CXA1518Q/S 24 23 22 21 20 19 18 17 TEST MAIN DEEM MATRIX SCIN 25 OUTPUTAMP & OUTPUT SW MAIN OUT CUE CARRIER MAIN SUB SUB DEEM SCOUT 26 L R 16 FOMO I 2 L LOGIC NC 27 FM SUBI 28 BIAS DEMOD GND 29 CURRENT FLAJ 30 14 MODE 3.5fH 952HZ CLOCK CLOCK SUB DET 13 NC 12 NC IBIAS REFL 31 SUB BPF VOLTAGE REGULATOR VCC 32 15 MUTE CONT 11 LEDMAIN LED DRIVE 3.5fH VCO 10 LEDSUB 9 CUE BPF 4.5fH TRAP BUFFER AM DEMOD 952HZ BPF COMP BIAS VOLTAGE INAMP 6 7 NC CUBI 8 NC 5 NC NC 3 MPXIN 4 2 NC NC 1 MPX SIGNAL M OUT FOMO MUTE MODE 19 TEST R OUT 20 L OUT SC IN 21 MC IN SC OUT 22 MC OUT SUBI CXA1518S 18 17 16 15 14 13 12 L OUTPUTAMP & OUTPUT SW MATRIX R SUB DEEM SUB CONT MAIN 3.5fH 952HZ CLOCK CLOCK 3.5fH VCO SUB DET 4.5fH TRAP AM DEMOD BIAS VOLTAGE CUE BPF COMP LED DRIVE 4 5 FLAJ REFL VCC NC 6 7 8 9 10 11 LEDMAIN 3 LEDSUB 2 LEDST 1 GND MPX SIGNAL CUBI VOLTAGE REGULATOR 952HZ BPF NC BUFFER I 2 L LOGIC MPX IN SUB BPF IBIAS CUE CARRIER MAIN DEEM IN AMP FM DEMOD BIAS CURRENT MAINOUT —2— LEDST CXA1518Q/S Pin Description Pin No. Symbol SDIP QFP 1 29 GND (Ta=25 °C, VCC=5 V) Pin voltage 0 Pin numbers in brackets are for the CXA1518Q. Equivalent circuit Description GND VCC VCC 10k 2 30 FLAJ 2.4 V Filter adjustment pin 147 2 (30) 80k 40µ GND VCC 3 3 31 REFL 2.5 V (31) VCC 54k 14k 1.5k 14k Connects noise elimination filter of internal reference power supply. 20k 4 32 VCC — Power supply pin VCC 90k 147 6 3 MPXIN 2.5 V 6 (3) 30k 25k 80µ VCC Sound multiplexing signal input. Standard input level=70 mVrms (MONO 100 %) 2.5V GND VCC 1k 147 8 7 CUBI 2.4 V 8 (7) 40k 40k 11k 2k 2.5V —3— Connects bias capacitor for Cue pulse generator. CXA1518Q/S Pin No. Symbol SDIP QFP 9 9 Pin voltage Equivalent circuit VCC VCC LEDST Description VCC 147 9 Connects the LEDs to display each mode. Pin 9: Stereo Pin 10: Sub Pin 11: Main 147 10 10 10 LEDSU — 147 11 64k 11 11 64k 16k LEDM 16k 64k 16k GND VCC VCC 20µA 12 14 MODE — 147 16k 12 (14) 2.4V Switches the output mode with the DC voltage during bilingual broadcasting. 8k 16k GND VCC VCC Output mute pin. When set to high, only DC is output from Pins 15, 16 and 17 (Pins 17, 18 and 20). 8k 13 15 MUTE — 13 (15) 147 32k 160k GND VCC VCC 40µ 14 16 FOMO — 147 1k 14 (16) 80k GND VCC 15 17 MOUT 2.4 V VCC 147 Main signal output pin. Always outputs the main signal component regardless of the broadcast mode. 14k 15 (17) Forced monaural pin. When set to high, monaural function (main) is forcibly set regardless of stereo and bilingual broadcasts and LEDs are extinguished. 32k 32k GND —4— CXA1518Q/S Pin No. Symbol SDIP QFP Pin voltage Equivalent circuit VCC VCC 16 18 ROUT Description 147 14k 2.4 V R-ch output pin 16 (18) 32k 32k GND VCC VCC 17 20 LOUT 147 L-ch output pin. During “TEST”, outputs the Cue signal component passed through the Cue BPF. 14k 2.4 V 17 (20) 32k 32k GND VCC VCC VCC 18 22 MCIN 147 2.5 V 147 19 20P 147 18 19 20 24 25 MCOUT SCIN 1.7 V 16k (22) 160µ 2.5V 80µ 80µ GND VCC VCC 2.5 V Connects DC cut capacitor of the main signal. 147 (24) VCC 147 147 21 20 147 26 SCOUT 147 5k (25) 21 Connects DC cut capacitor of the sub signal. 18p (26) 1.7 V 12k 2.5V 160µA 80µA 80µA GND VCC 80µ VCC 22 28 SUBI 2.4 V 20µ 16k 15k 64k 1k 8k 8k 22 (28) 147 2.5V 1.4V 147 —5— Connects bias capacitor of the sub FM detector. Grounding this pin enables the TEST mode for filter adjustment. CXA1518Q/S Pin No. Symbol SDIP QFP 1, 2 4, 5 6, 8 5, 7 NC 12, 13 19, 21 23, 27 Pin voltage Equivalent circuit — — Description Keep these pins open (They are not connected to the chip.) Electrical Characteristics Measurement Circuit (CXA1518S) NORM (OFF) C9 1µF 15kHZ LPF MAIN OUT L OUT TEST (ON) SW4 C10 10µF R OUT SW1 ON OFF SW6 SW2 RMS DISTORTION DC VOLT SW3 C10 1µF E2 22 21 20 19 18 17 16 15 14 13 12 1 2 3 4 5 6 7 8 9 10 11 VR1 20K A C3 10µF C1 10µF C4 10µF R3 470 E3 E4 MAIN R4 470 E1 5V C2 47µF SIG STEREO SUB R2 470 R1 22K SIGNAL MEASUREMENT SYSTEM CCIR FILTER ATT SW5 ∗ Set ATT such that the stereo separation (L → R) to minimum. —6— CXA1518Q/S Electrical Characteristics (Ta=25 °C, VCC=5 V) No. 1 Item Current consumption Symbol ICC SW Bias conditions conditions 1 1 Pin numbers shown in conditions are for the CXA1518S. Conditions Measures the input current to Pin 4. Test point Min. Typ. Max. Unit 14 20 26 mA 330 380 480 mVrms –1.6 –0.6 0 dB –19.0 –17.0 –14.7 dB — 1 2 % and 20 58 62 — dB Pin 17 Pin 20 — 0.2 1.5 % Pin 16 Pin 18 — 0.2 1.5 % Pin 17 Pin 20 310 360 440 mVrms SDIP Pin 4 QFP Pin 32 Input signal: SIG1 2 Sub output level 400 Hz VS1 4 2 Measures output amplitude Pins 16 Pins 18 and at Pins 16 and 17 (400 Hz, and 17 sine wave) : Vs1 ∗1 3 and 20 (15 k LPF) Input signal: SIG2 Measures output amplitude Sub frequency 3 response characteristics 2 FS1 4 and 3 1 kHz at Pins 16 and 17 (1kHz, Pins 16 Pins 18 sine wave) : Vs2 and 17 Fs1=20 log and 20 ∗1 Vs2 Vs1 (15 k LPF) Input signal: SIG3 Measures output amplitude Sub frequency 4 response characteristics 2 FS2 4 and 3 10 kHz at Pins 16 and 17 (10 kHz, Pins 16 Pins 18 sine wave) : Vs3 and 17 Fs2=20 log and 20 ∗1 Vs3 Vs1 (15 k LPF) Input signal: SIG2 5 Sub distortion factor 2 DS 4 Measures output signal Pins 16 Pins 18 and distortion factor at Pins 16 and 17 3 and 17 (1 kHz, sine wave). ∗1 and 20 (15 k LPF) Input signal: SIG2 6 Sub S/N NS 4 2 Measures S/N ratio of the Pins 16 Pins 18 and outputs (1 kHz) at Pins 16 and 17 and 17. ∗1 3 (15 k LPF. RMS) Input signal: SIG4 Stereo 7 distortion factor Measures output signal Dst1 4 2 L ch distortion factor at Pin 17 (1 kHz, sine wave). (15 k LPF) Input signal: SIG5 Stereo 8 distortion factor Measures output signal Dstr 4 2 R ch distortion factor at Pin 16 (1 kHz, sine wave) (15 k LPF) Input signal: SIG4 Stereo 9 output level L ch 1 kHz Vst1 4 2 Measures output amplitude at Pin 17 (1 kHz, sine wave). (15 k LPF) ∗1 When bias condition is [3], the test point is Pin 16 only. —7— CXA1518Q/S Item No. Symbol SW Bias conditions conditions output level Vstr 4 2 R ch 1 kHz level Min. Typ. Max. Unit Pin 18 310 360 440 mVrms Pin 17 330 390 480 mVrms 330 390 480 mVrms –1.6 –0.6 0 dB –16.5 –14.5 –12.5 dB — 0.2 1 % — 0.2 1 % — 0.3 3 % 65 69 — dB QFP Measures output amplitude at Pin 16 (1 kHz, sine wave). Pin 16 Pin 15 (15 k LPF) Input signal: SIG6 Main output 11 Test point SDIP Input signal: SIG5 Stereo 10 Conditions Vm1 4 2 MAIN OUT Measures output signal at Pin 15 (400 Hz, sine wave). (15 k LPF) Input signal: SIG6 12 Main output level Measures output signal Vm2 4 2 amplitude at Pins 16 and 17 (400 Hz, sine wave). Pins 16 Pins 18 and 17 and 20 (15 k LPF) Input signal: SIG7 Measures output amplitude Main frequency 13 response characteristics at Pins 16 and 17 (1kHz, Fm1 4 2 1 kHz sine wave) : Vm3 Fm1=20 log Vm3 Pins 16 Pins 18 and 17 and 20 Pin 15 Pin 17 Vm2 (15 k LPF) Input signal: SIG8 Measures output amplitude Main frequency 14 response characteristics at Pins 16 and 17 (10 kHz, Fm2 4 2 10 kHz sine wave): Vm4 Fm2=20 log Vm4 Vm2 (15 k LPF) Input signal: SIG7 Main distortion 15 factor Measures output signal Dm1 4 2 MAIN OUT distortion factor at Pin 15 (1 kHz, sine wave). Pins 16 Pins 18 and 17 and 20 (15 k LPF) Input signal: SIG7 16 Main distortion factor Measures output signal Dm2 4 2 distortion factor at Pins 16 and 17 (1 kHz, sine wave). Pins 16 Pins 18 and 17 and 20 (15 k LPF) Input signal: SIG9 Main distortion 17 factor at Measures output signal Dm3 4 2 maximum input distortion factor at Pins 16 and 17 (1 kHz, sine wave). Pins 16 Pins 18 and 17 and 20 (15 k LPF) Input signal: SIG7 Measures S/N ratio of 18 Main S/N ratio Nm 4 2 outputs at Pins 16 and 17 (1 kHz). (15 k LPF. RMS) —8— Pins 16 Pins 18 and 17 and 20 CXA1518Q/S No. Item Symbol SW Bias conditions conditions Test point Conditions SDIP QFP Min. Typ. Max. Unit 35 50 — dB 35 50 — dB 52 59 — dB 59 66 — dB 52 58 — dB Input signal: SIG4 Sstr= Stereo 19 separation Pin17 Sstr 4 2 L→R 20 log output amplitude Pin 16 Pins 16 Pins 18 (dB) and 17 and 20 output amplitude (15 k LPF) Input signal: SIG5 Sstl= Stereo 20 separation Pin16 Sstl 4 2 R→L 20 log output amplitude Pin17 Pins 16 Pins 18 (dB) and 17 and 20 output amplitude (15 k LPF) Input signal: SIG15 Calculates the level difference between the output amplitude at Pins 16 and 17 21 Cross talk Main → Sub Cms1 2 2 (Vms1) and the measured Pins 16 Pins 18 value in measurement and 17 and 20 No. 13 (Vm3). Cms1=20 log Vm3 Vms1 (dB) (15 k LPF, 1 k BPF) Input signal: SIG2 Calculates the level difference between the output amplitude at Pins 16 and 17 22 Cross talk Sub → Main Csm1 2 1 (Vsm1) and the measured Pins 16 Pins 18 value in measurement and 17 and 20 No. 3 (Vs2). Csm1=20 log VS2 Vsm1 (dB) (15 k LPF, 1 k BPF) Input signal: SIG15 Calculates the level difference between the output Cross talk 23 Main → Sub BOTH MODE Cms2 2 3 amplitudes at Pin 16 (Vms2) Pins 16 Pins 18 and at Pin 17 (Vms3) and 17 Cms2=20 log Vms3 Vms2 (dB) (15 k LPF, 1 k BPF) —9— and 20 CXA1518Q/S No. Item Symbol SW Bias conditions conditions Test point Conditions SDIP QFP Min. Typ. Max. Unit 59 64 — dB — 14 30 mVrms — 10 20 mVrms 70 80 — dB 70 80 — dB 70 80 — dB Input signal: SIG2 Calculates the level difference between the output Cross talk 24 Sub → Main Csm2 2 3 BOTH MODE amplitude at Pin 17 (Vsm2) Pins 16 Pins 18 and at Pin 16 (Vsm3). and 17 Csm2=20 log Vsm3 Vsm2 and 20 (dB) (15 k LPF, 1 k BPF) Input signal: SIG11 25 Residual carrier Sub Lcs 3 2 Measures the amplitude of Pins 16 Pins 18 the subcarrier component of and 17 and 20 the output at Pins 16 and 17. Input signal: SIG11 26 Residual carrier Main Lcm 3 1 Measures the amplitude of Pins 16 Pins 18 the subcarrier component of and 17 and 20 the output at Pins 16 and 17. Input signal: SIG7 Calculate the level difference between the output amplitude at Pins 16 and 17 27 Mute volume Main Mm 2 4 (VMm) and the measured Pins 16 Pins 18 value in measurement and 17 and 20 No. 13 (Vm3). Mm=20 log Vm3 VMm (dB) (1 k BPF, 15 k LPF) Input signal: SIG2 Calculates the level difference between the output amplitude at Pins 16 and 17 28 Mute volume Sub Ms 2 4 (VMs) and the measured Pins 16 Pins 18 value in measurement and 17 and 20 No. 3 (Vs2). Ms=20 log Vs2 VMs (dB) (1 k BPF, 15 k LPF) Input signal: SIG4 and 5 Measures output signal level difference at Pins 16 and 17 under bias conditions 2 and 4. 29 Mute volume Stereo 2 Mst 2 Mst= measured value and Pins 16 Pins 18 under bias condition 2 and 17 4 20 log (mVrms) and 20 ∗2 measured value under bias condition 4 (mVrms) (1 k BPF, 15 k LPF) ∗2 Measure Pin 17 when input signal is SIG4, and Pin 16 when input signal is SIG5. —10— CXA1518Q/S No. 30 31 32 Item DC offset Stereo L ch DC offset Stereo R ch DC offset Main out Symbol SW Bias conditions conditions 2 Ostl 3 and 4 2 Ostr 3 and 4 2 Om 3 and 4 Conditions Test point Min. Typ. Max. Unit Pin 20 — 20 100 mV Pin 16 Pin 18 — 20 100 mV Pin 15 Pin 17 — 20 100 mV — — 8 11 17 dB — — 9 12 17 dB Pin 17 Pin 20 125 190 290 mVrms Pin 22 Pin 28 20 35 — dB SDIP QFP Pin 17 Input signal: SIG18 Measures output DC level fluctuation at Pin 17 under bias conditions 2 and 4. Input signal: SIG18 Measures output DC level fluctuation at Pin 16 under bias conditions 2 and 4. Input signal: No input Measures output DC level fluctuation at Pin 15 under bias conditions 2 and 4. Input signal: SIG12 33 Cue detector sensitivity Varying SIG12, measures CD 4 2 attenuation while switching from monaural to sound multiplexing mode. Input signal: SIG13 34 Sub detector sensitivity Varying SIG13, measures SD 4 2 attenuation while switching from monaural to sound multiplexing mode. Input signal: SIG14 35 Cue BPF gain CG 5 2 Measures output amplitude at Pin 17 Input signal: SIG16 and SIG17 Measuring output amplitude at Pin 22, measure the output signal level difference 36 4.5 fH trap attenuation level TG 6 2 when inputting SIG16 and when inputting SIG17. TG= measured value 20 log for SIG16 (mVrms) measured value for SIG17 (mVrms) —11— CXA1518Q/S SW Condition Table SW No. 1 2 3 4 5 6 BIAS Condition Table 1 2 3 4 5 6 off off off on off off off on off off off off off off on off on on off off off off on off off off off off on on off off off off off on —12— SW No. 1 2 3 4 E1 E2 E3 E4 5V 5V 5V 5V 0.5 V 4.5 V 2.5 V 4.5 V 0.5 V 0.5 V 0.5 V 4.5 V 0.5 V 0.5 V 0.5 V 0.5 V CXA1518Q/S Input Signal Definitions SIG1 : Sound MPX signal Main : 0 % Sub : 400 Hz, 100 % MOD Cue : Bilingual SIG10 : Sound MPX signal L ch : 1 kHz, 100 % R ch : 0 % Cue : Cue signal OFF SIG2 : Sound MPX signal Main : 0 % Sub : 1 kHz, 100 % MOD Cue : Bilingual SIG11 : Sound MPX signal Main : 0 % Sub : 0 % (carrier only) Cue : Bilingual SIG3 : Sound MPX signal Main : 0 % Sub : 10 kHz, 100 % MOD Cue : Bilingual SIG12 : Sound MPX signal Main : 0 % Sub : 0 % (carrier only) Cue : Bilingual (Level adjusted to the minimum) SIG4 : Sound MPX signal L ch : 1 kHz, 100 % R ch : 0 % Cue : Stereo SIG5 : Sound MPX signal L ch : 0 % R ch : 1 kHz, 100 % Cue : Stereo SIG6 : Sound MPX signal Main : 400 Hz, 100 % Sub : Carrier OFF Cue : Cue signal OFF SIG7 : Sound MPX signal Main : 1 kHz, 100 % Sub : Carrier OFF Cue : Cue signal OFF SIG8 : Sound MPX signal Main : 10 kHz, 100 % Sub : Carrier OFF Cue : Cue signal OFF SIG13 : Sound MPX signal Main : 0 % Sub : 0 % (level adjusted to the minimum) Cue : Bilingual SIG14 : 55.069 kHz sine wave 5.6 mVrms SIG15 : Sound MPX signal Main : 1 kHz, 100 % Sub : 0 % (carrier only) Cue : Bilingual SIG16 : 31.47 kHz sine wave 42 mVrms SIG17 : 70.80 kHz sine wave 42 mVrms SIG18 : Sound MPX signal L ch : 0 % R ch : 0 % Cue : Stereo ∗ Sound MPX signal level is defined as monaural 100 % at 1 Vp-p. SIG9 : Sound MPX signal Main : 1 kHz, 250 % Sub : Carrier OFF Cue : Cue signal OFF —13— CXA1518Q/S Output and LED ON/OFF Table MODE SW Broadcast status SUB BOTH MAIN Stereo × × × on × × × × × × on Bilingual Monaural on × × × × × × × × × Forced monaural MUTE off on × off off off on × × × off off on off off off off on off on L Output status LED ON/OFF conditions R SUB MAIN off off off on on off off off off off off off off off on on off off off off MAIN STEREO L R L+R L+R L+R L+R DC DC DC SUB SUB MAIN MAIN SUB MAIN MAIN MAIN MAIN MAIN MAIN MAIN DC DC DC MONO MONO MONO DC DC DC on off off off off off off off off off × : No response Control Voltage Range Pin numbers in brackets are for the CXA1518Q. MODE SW Pin 12 (Pin 14) FORCED MONO Pin 14 (Pin 16) SUB BOTH MAIN Voltage range 4.0 V to VCC 2 V to 3 V 0 V to 0.5 V on 3 V to VCC off 0 V to 0.5 V (or OPEN) MUTE Pin 13 (Pin 15) on 3 V to VCC off 0 V to 0.5 V (or OPEN) Description of Operation Pin numbers in brackets are for the CXA1518Q. The sound multiplexing signal input from Pin 6 (Pin 3) passes through IN AMP, and is added to the Cue BPF, SUB BPF and the MAIN de-emphasis circuits. 1 Discrimination system The Cue BPF passes only the Cue signal component of the multiplexing signal. The AM demodulator detects the amplitude modulation of the Cue signal (AM wave) and generates a sine wave of either 922.5 Hz (for bilingual) or 982.5 Hz (for stereo sound). COMP shapes the carrier-stripped Cue signal into a waveform, transforming it into pulses of either 922.5 Hz or 982.5 Hz, after which it is added to the LOGIC unit. A 3.5fH VCO generates a 3.5fH pulse locked to the Cue signal carrier wave (3.5fH), and sends it to the LOGIC unit. The LOGIC unit performs broadcast mode discrimination using the countdown method. From this result, and the existence/absence of a SUB signal from the SUB Detector, MUTE ON/OFF from CONT, MODE Switch, and the FOMO ON/OFF commands, the logic unit generates an output switchover control signal to control the output statuses of OUTPUT SW and MAIN OUT. —14— CXA1518Q/S 2 Main system MAIN DEEM applies de-emphasis on the MAIN signal component and removes the SUB and Cue components. After having passed through MAIN DEEM, the MAIN signal is added to MARTIX, OUTPUT AMP, and MAIN OUT. 3 Sub system SUB BPF passes the SUB signal component of the multiplexed signal. A 4.5fH trap filter then removes the digital facsimile signal component. FM demodulation frequency demodulates the Sub signal. The SUB DEEM applies de-emphasis on the FM demodulated Sub signal and removes the carrier wave component. After passing through SUB DEEM, the SUB signal is added to MATRIX and OUTPUT AMP. 4 Matrix and output system When broadcasting in stereo, MATRIX generates L and R signals by adding and subtracting the MAIN signal from MAIN DEEM and the SUB signal from SUB DEEM. OUTPUT AMP & OUTPUT SW switch the output signals as instructed by LOCIG. Note that MAIN OUT always outputs the MAIN signal component regardless of the broadcast mode. Adjustment Methods 1. Preset before filter adjustment Japan sound multiplexing encoder Application circuit MPX IN VR2 TP1 Oscilloscope Fig. 1 Procedure 1) Connect as shown in Fig. 1 2) Set the encoder to MONO MODE, and input a 1 kHz signal to MPX IN. 3) Adjust VR2 until the level on TP1 (Pin 6) is 0.2 Vp-p (70 mVrms). (Pin 3 for the CXA1518Q) —15— CXA1518Q/S 2. Filter adjustment Japan sound multiplexing encoder Application circuit MPX IN TEST SW4 VR1 Oscilloscope L OUT Fig. 2 Procedure 1) Connect as shown in Fig. 2. 2) Set SW4 to TEST. (Turn SW6 OFF) 3) Put the encoder in stereo mode, and input only a modulated Q signal into MPX IN of the board. 4) Observing L.OUT with the oscilloscope, adjust VR1 until the Q signal output to be maximum. 3 Separation adjustment Japan sound multiplexing encoder Application circuit Oscilloscope R MPX IN AC voltmeter L CH1 CH2 VR2 1kHz BPF L.OUT R.OUT Switch Fig. 3 Procedure 1) Connect as shown in Fig. 3. (Set SW4 to NORM) 2) • Set the encoder to stereo mode and perform 100 % modulation of a 1 kHz signal. • Output only the L ch. 3) Observing the oscilloscope and the AC voltmeter, adjust VR2 until the R ch to be minimum. (Separation standard 35 dB or more) —16— CXA1518Q/S C7 10µ C8 1µ 24 23 22 21 20 MAIN OUT R OUT L OUT Application Circuit CXA1518Q C6 C5 10µ 10µ 19 18 17 25 C9 1µ C10 NORM 10µ (OFF) 16 14 SW1 13 MAIN BOTH SUB 29 12 30 11 31 10 32 A ON OFF ON 27 TEST (ON) C1 10µ SW2 15 SW4 VR1 20k OFF 26 28 R1 22k SW3 9 1 2 3 4 5 6 C3 10µ C2 47µ SUB R5 2.4k R4 470 R3 470 R2 STEREO 470 8 C4 10µ VCC 5V 70mVRMS (MONO 100%) MPX IN VR2 1k 7 MAIN R6 2.4k ∗ Non-polar capacitor is recommended for C8 and C9. ∗ NC pin is left open. 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. —17— CXA1518Q/S TEST (ON) SW4 NORM (OFF) C9 1µF MAIN OUT C10 10µF R OUT L OUT CXA1518S C6 10µF C8 1µF C7 10µF R6 2.4k ON ON C5 10µF SW1 21 20 19 18 17 16 15 14 13 12 1 2 3 4 5 6 7 8 9 10 11 A C3 10µF C1 10µF STEREO SUB R2 470 R1 22k VR2 1K 70mVRMS (MONO 100%) R3 470 MAIN R4 470 VCC 5V MPX IN C2 47µF C4 10µF SUB OFF SW3 SW2 OFF 22 VR1 20k MAIN R5 2.4k BOTH ∗ Non-polar capacitor is recommended for C8 and C9. ∗ NC pin is left open. 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. —18— CXA1518Q/S SUB BPF frequency characteristics Output level (dB) Output level (dB) De-emphasis characteristics 0 –5 –10 MAIN 0 –20 –40 –15 SUB 100 1k –60 10k 10 20 30 40 50 60 70 80 Frequency (Hz) Frequency (Hz) Cue BPF frequency characteristics MAIN distortion characteristics 90 100 2 Distortion (%) Attenuation (dB) 3 0 –20 1 –40 0.5 –60 0 100 3.5fH–40k 3.5fH–20k 3.5fH 3.5fH+20k 3.5fH+40k 200 300 MAIN degree of modulation factor (%) Frequency (Hz) —19— CXA1518Q/S Package Outline Unit : mm CXA1518Q 32PIN QFP (PLASTIC) 9.0 ± 0.2 0.1 + 0.35 1.5 – 0.15 + 0.3 7.0 – 0.1 24 17 16 32 9 (8.0) 25 1 + 0.2 0.1 – 0.1 0.8 0.24 0.50 8 + 0.15 0.3 – 0.1 + 0.1 0.127 – 0.05 M 0° to 10° PACKAGE MATERIAL EPOXY RESIN SONY CODE QFP-32P-L01 LEAD TREATMENT SOLDER PLATING EIAJ CODE QFP032-P-0707 LEAD MATERIAL 42 ALLOY PACKAGE MASS 0.2g JEDEC CODE + 0.1 0.05 0.25 – 22PIN SDIP (PLASTIC) CXA1518S + 0.4 19.2 – 0.1 7.62 + 0.3 6.4 – 0.1 12 22 0° to 15° 11 1 0.5 ± 0.1 + 0.15 0.9 – 0.1 + 0.4 3.9 – 0.1 + 0.15 3.25 – 0.2 0.51 MIN 1.778 Two kinds of package surface: 1.All mat surface type. 2.All mirror surface type. PACKAGE STRUCTURE MOLDING COMPOUND EPOXY RESIN SONY CODE SDIP-22P-01 LEAD TREATMENT SOLDER PLATING EIAJ CODE SDIP022-P-0300 LEAD MATERIAL COPPER ALLOY PACKAGE MASS 0.95g JEDEC CODE —20—