cxa1911q Sony Electronics, cxa1911q Datasheet
cxa1911q
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cxa1911q Summary of contents
Page 1
... Dolby B/C Type Noise Reduction System with Playback Equalizer For the availability of this product, please contact the sales office. Description The CXA1911Q designed for use in car stereo cassette decks. Functions include Dolby B/C type noise reduction, playback equalizer amplifier and music sensor into a single chip. ...
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... PBFB1 300k PBRIN1 F/R PBFIN1 PBGND E IREF F/R PBFIN2 300k PBRIN2 PBFB2 PBTC2 10dB LPF —2— CXA1911Q TAPESW DRSW NRMODE MSSW MSMODE MODE G1 (FF) G2 (NOR) G1/G2 MSTC DET MSOUT 9 10 ...
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... MSLPF 4.0 100k Equivalent circuit Refer to Page 7. 3 147 28 12µA VGS V CC 100k 5 147 64p GND —3— CXA1911Q (Ta=25°C, V =8.0V, no signal) CC Description PBEQ output PBEQ feedback PBEQ input Power supply TAPE input No connection Adjustment of MS LPF frequency ...
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... GND 35 PBGND Equivalent circuit 6 147 V CC 200 147 7 200 24 GND 8 147 23 9 147 22 —4— CXA1911Q Description Connection of reference current setting resistor for Dolby block Line output Time Constant pin for the LLS Time Constant pin for the HLS Ground ...
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... V CC 50µ 50µ 147 16 GND —5— CXA1911Q Description MS output Connection of MS detection time constant MS feedback MSMODE MS gain selector G1 when high, G2 when low DRSW Head selector Reverse when high, Forwards when low TAPESW Equalizer selector 120µs when high, 70µs when ...
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... Q3 to VGS 147 25 45k V 147 31 40 42µ 30µ GND V CC 147 1.25V 36 10µ GND —6— CXA1911Q Description Noise reduction selector C when high, B when low V /2 output CC PBEQ capacitance CC Connection of reference current setting resistor for PBEQ block ...
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... LINE OUT –25dB TAPE IN CP3 2kHz, LINE OUT –60dB TAPE IN CP4 2kHz, LINE OUT –25dB TAPE IN CP5 5kHz, LINE OUT –25dB TAPE IN CP6 10kHz, LINE OUT 0dB NR C, TAPEIN —7— CXA1911Q Vcc V REG 600 GND Min. Typ. Max. Unit 7.8 8.0 11 ...
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... NRSW, TAPESW, DRSW, NRMODE, MSSW, MSMODE signal, 3.4 V applied to VCT and 1 CRG to PBFB No signal, VCT level when boost charge V CRG1 ON No signal, VCT level when boost charge V CRG2 OFF —8— CXA1911Q Min. Typ. Max. Unit — 0.01 0.2 — 0.04 0.2 % — 0.07 0.3 77.0 84.0 — ...
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... CXA1911Q ...
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... Operating modes (TAPESW, DRSW, NRSW, MSSW, MODESW, NRMODE) The CXA1911Q has an NR switch (NRSW), NR mode switch (NRMODE), equalizer switch (TAPESW), head switch (DRSW), MS switch (MSSW), and MS gain switch (MSMODE). The operating modes for each switch are shown in the following table. SW Function for Low input ...
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... With this method, the capacitance value can be reduced according to the amount that the resistance value is increased even for the same cut-off frequency. (These specifications use the latter method.) Dolby level (–6dBm) LINEOUT PBOUT TAPEIN Op2 OFF Fig. 1 —11— CXA1911Q 4dB NR 20dB 20dB ...
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... Note) This diagram illustrates the case where the Dolby level is aligned by adjusting the resistance value connected to PBFB –30dBm –30dBm Fig.2 —12— CXA1911Q –6dBm Dolby level ...
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... The low-band cut-off frequency (fc) can be determined by the external resistor R1 and external capacitor C1. Note) In this diagram, C1 and R1 are not connected in series, but are connected to PBFB from between R1 and C2. This is to prevent the sound quality from deteriorating when using an electrolytic capacitor PBTC PBOUT IREF 1 R4 IREF resistor —13— CXA1911Q ...
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... G1 and G2 have the same cut-off frequency 25kHz LPF 100k 64pF 100k External resistors R1 and 100k [dB 20log External resistors R1 and R2 and external capacitors C1 and External capacitor C3 —14— CXA1911Q MSTC MSOUT DET [dB] R2 ...
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... C typ e decode characteristics 24 V =8. 0dB=Dolby Level –4 50 100 —15— CXA1911Q Ta=25° C 120µs 70µs 1k 10k Frequency [Hz] OUT 300k 0.01µ 33µ 270 Ta=25° C –60dB –50dB –40dB –30dB –20dB –10dB 0dB 500 1k 5k ...
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... OFF f=1kHz f=1kHz –8 –4 0 Rip p le rejection ratio (PB O UT) Ta=25° C –10 Vcc=8.0V RL=2.7k –20 –30 –40 –50 –60 50 100 —16— CXA1911Q Ta=25° f=100kHz NR B f=10kHz Output level [dB] Ta=25° C 500 1k 5k 10k Frequency [Hz] ...
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... NR C –60 –70 100 500 5k 10k MS b lock gain vs. B lank detection level Ta = 25° 8.0 V –30 –40 –50 –60 10k –70 10 —17— CXA1911Q 2ch) Ta=25 ° 10k Frequency [Hz] Ta=25° =8.0V CC Input : TAPEIN1 f=1kHz HPF gain [dB] ...
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... SONY CODE EIAJ CODE JEDEC CODE 40PIN QFP (PLASTIC) 9.0 ± 0.4 + 0.4 7.0 – 0 0.15 0.3 – 0.1 ± 0.12 M PACKAGE STRUCTURE DETAIL A PACKAGE MATERIAL QFP-40P-L01 LEAD TREATMENT LEAD MATERIAL QFP040-P-0707 PACKAGE WEIGHT —18— CXA1911Q + 0.35 1.5 – 0.15 + 0.1 0.127 – 0.05 0.1 A EPOXY RESIN SOLDER / PALLADIUM PLATING COPPER / 42 ALLOY 0.2g ...