cxa1704r Sony Electronics, cxa1704r Datasheet
cxa1704r
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cxa1704r Summary of contents
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... REC/PB Amplifier for 8mm VCR Description The CXA1704R is a bipolar IC designed as a recording/playback amplifier for Hi8-compatible VCRs. Features O Recording system • Feedback damping provided in the recording amplifier and its EVR control function facilitate circuit board design. • Y, chroma, and low-band level adjustment functions • ...
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... MUTE M•T –6dB 1CH(0dB) 1CH(6dB) 2CH(0dB) VIDEOSW 2CH(6dB) MUTE RF AGC VPSW1 VIDEO 1 1 PCM YGCA VPSW2 VIDEO 1 PCM —2— CXA1704R DOP 12 DOCDET 11 RFAGCIN 10 12dB RFAGCTC 9 DOCDET AGCDET RFAGCOUT 8 YLEVEL 7 YIN 6 LOWLEVEL 5 CIN CGCA 4 1 XGAIN LOWGCA ...
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... Input level is 125 mVp-p (typ.). When not used, connect this pin to 20p 143 Vcc. 2 VIDEO SW gain switch. Low : 6 dB 35µ High : 0 dB 143 3 Recording chroma input. Input the signal with capacitor 70µ coupling. Input level is 300 mVp-p (typ.). 143 4 —3— CXA1704R Description ...
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... Input the signal with capacitor 40µ coupling. Input level is 500 mVp-p (typ.). 143 6 EVR adjustment of recording Y signal level. The Y LEVEL is small when the applied voltage is large. 143 7 23k 90µ 90µ Playback Y signal output. Output level is 380 mVp-p (typ.). 40µ 8 600µ —4— CXA1704R Description ...
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... AFM TRAP, and C TRAP, and is 10 then input to Pin 10 (RFAGCIN) 50µ again cut off by internal capacitor. When not used, connect this pin to Vcc. Determines the dropout detection level. 143 11 50µ Dropout detection signal output. Goes high when a dropout is detected. 12 —5— CXA1704R Description ...
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... Boost is small when the applied voltage is large. 143 15 14k 90µ 90µ Playback PCM output. 40µ 16 400µ EVR adjustment that determines f of the middle-frequency tuner. f large when the applied voltage is large. 143 17 41k 40µ 40µ —6— CXA1704R Description ...
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... Equivalent circuit REC/PB switch. 35µ High : PB 35µ Low : REC 143 18 Power supply for sections other than the REC amplifier and the PB amplifier. Connect to GND. 35µ 35µ 143 20 RFSWP input. 35µ 35µ 143 21 Connect to GND. 35µ 35µ 143 22 —7— CXA1704R Description ...
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... Q is large when the applied voltage is large. 143 24 50k 40µ 40µ Channel 1 power supply. EVR adjustment of recording channel 1 damping Damping is applied strongly when the applied voltage is small. 143 26 71k 40µ 40µ Recording channel 1 output. Open collector. 27 —8— CXA1704R Description ...
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... V Equivalent circuit 28 40µ 40µ 40µ 40µ —9— CXA1704R Description Playback channel 1 input. Channel 1 GND. The playback channel 1 damping is determined by the external resistance. Damping is applied strongly when the resistance is large. The playback channel 2 damping is determined ...
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... Damping is applied strongly when the applied voltage is small. 143 35 71k 40µ 40µ Channel 2 power supply. Channel 2 recording amplifier input. DC cut-off is applied to the Pin 38 signal by external capacitor, and 143 then the resulting signal is input. 37 240µ —10— CXA1704R Description ...
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... Output level is 200 mVp-p (typ.). 38 400µ 4.15 V regulator output. 39 Channel 1 recording amplifier input. DC cut-off is applied to the Pin 41 signal by external capacitor, and 143 then the resulting signal is input. 40 240µ Recording channel 1 VPSW output. Output level is 200 mVp-p (typ.). 40µ 41 400µ —11— CXA1704R Description ...
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... V internal reference voltage source. 20k 45 75µ Recording PCM input. Input the signal with capacitor 70µ coupling. Input level is 300 mVp-p (typ.). 143 46 —12— CXA1704R Description resistance is inserted resistance to GND. ...
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... Pin No. Symbol Pin voltage 47 PCMREC — 48 ATFIN 2.4 V Equivalent circuit PCM recording switch. 35µ 35µ PCM recording is selected when high. 143 47 Recording ATF input. Input the signal with capacitor 70µ coupling. Input level is 125 mVp-p (typ.). 143 48 —13— CXA1704R Description ...
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... CXA1704R ...
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... Does not operate PCM signal is selected. CH1 : CH1 signal is output. CH2 : CH2 signal is output. 49 5.6µH 0.01µ pin 1 CXA1704 head amplifier = 8 0 —17— CXA1704R Playback system Operation VIDEO REC PCM REC CH1 CH2 CH2 CH1 O O CH1 CH2 O O CH2 CH1 ...
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... CXA1704R ATFIN ATFIN PCMREC PCMREC PCMIN PCMIN VG2 IR IR1 GND VPSW1OUT VPSW1OUT REC1IN REC1IN VREG VPSW2OUT VPSW2OUT REC2IN REC2IN ...
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... CXA1704R ATFIN PCMREC PCMIN VG2 IR IR1 GND VPSW1OUT REC1IN VREG VPSW2OUT REC2IN ...
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... The detector input includes an HPF with a cut-off frequency of approximately 1 MHz, so that the gain in the bandwidth corresponding roughly to the Y signal is detected. <Dropout detection> A dropout is detected in the playback video signal, and a dropout pulse is output. The detection level is set to the optimum level based on a 224 mVp-p input as a reference. —20— CXA1704R ...
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... Vreg (4.15 V) and Vg2 (2.45 V) are generated as the reference voltages used in the IC. Do not use these as external power supplies because they could cause cross talk in the IC. <EVR adjustment> The voltage applied to the EVR adjustment pin is Vcc- variable, ranging from 1 Vcc. —21— CXA1704R ...
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... Pin 5 (LOWLEVEL) voltage (V) –10 –15 –20 –25 – –35 2 –10 –15 –20 –25 – —22— CXA1704R LOWGCA (Video path) gain control YLEVEL=Vylev 3 4 Pin 5 (LOWLEVEL) voltage (V) CGCA gain control When YLEVEL=Vylev and LOWLEV=Vllev 3 4 Pin 1 (CCONT) voltage ( ...
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... Middle-frequency tuner fo control Pin 17 (MYF0) voltage (V) Middle-frequency tuner boost control Pins 13 and 15 (MTG1, MTG2) voltage (V) Middle-frequency tuner Q control Pin 24 (MTQ) voltage (V) 5 —23— CXA1704R 4 5 ...
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... LQFP (PLASTIC (0.22) 12 0.127 – 0.02 + 0.08 + 0.2 1.5 – 0.1 0.1 ± 0.1 NOTE: Dimension “ ” does not include mold protrusion. DETAIL A PACKAGE STRUCTURE PACKAGE MATERIAL LEAD TREATMENT LQFP-48P-L01 QFP048-P-0707-A LEAD MATERIAL PACKAGE WEIGHT —24— CXA1704R + 0.05 0.1 EPOXY / PHENOL RESIN SOLDER PLATING 42 ALLOY 0.2g ...