cxa1702ar Sony Electronics, cxa1702ar Datasheet
cxa1702ar
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cxa1702ar Summary of contents
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... REC/PB Amplifier for 8 mm VCR Description The CXA1702AR is a bipolar IC designed as recording/playback amplifiers for Hi8-compatible VCRs. Features • Recording/playback system • Hi8-compatible wideband recording/playback amplifier. • Enables electric variable resistor (EVR) control. • Recording system • Feedback damping provided in the recording amplifier and its EVR control function facilitate printed circuit board design ...
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... VIDEOSW2 GND RF AGC VPSW1 VIDEO PCM VIDEO VPSW2 PCM VIDEO VPSW3 PCM 1 YGCA VIDEO VPSW4 PCM —2— CXA1702AR DOP DOCDET 12dB RFAGCIN DOCDET RFAGCTC RFAGCOUT AGCDET REFV BUFF T2 YLEV T1 LOWLEVEL YIN XDECK 1 ...
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... YLEVEL MTG —3— CXA1702AR 1CH, V 2CH=4.75V, Ta=25°C) CC Description Input pin for recording AFM signal. Input signal bias should be in the range from 3.5 V. Connect to Vcc when the pin is not in use. ...
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... GND. For adjustment, input voltage proportional to Pin 52 14 140 (VREG) output voltage. 4.15V 50µ 42.5k Increasing the input voltage increases the detection level. —4— CXA1702AR Description 4700p RFAGCTC 470k Increasing the input Connect decoupling ...
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... Power supply pin. Output pin for playback PCM 25µ signal. 19 3.5k 360µ 240µ EVR adjusting pin for middle tune fo. Increasing the input voltage 270 increases fo. 20 30k 11k 140 2.85V 1.7V 40µ 40µ —5— CXA1702AR Description ...
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... Goes L during recording and turns on 1Ach recording amplifier output bias current. Same as for Pin 21 Goes H during after-recording and turns on recording amplifier output bias current. EVR adjusting pin for middle tune Q. Increasing the input voltage 270 increases Q. 29 37.5k 12.5k 140 2.9V 1.8V 40µ 40µ —6— CXA1702AR Description ...
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... Same as for Pin 34. —7— CXA1702AR Description Dumping adjusting pin for 1Ach head amplifier. Increasing the external resistance reduces the peaking amount. 30 PBDUMP1A GND pin for 1Ach recording and head amplifiers. Playback signal 1Ach input pin. ...
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... Same as for Pin 30. — Same as for Pin 34. — Same as for Pin 34. — Same as for Pin 30. —8— CXA1702AR Description GND pin for 1Bch recording and head amplifiers. Dumping adjusting pin for 1Bch head amplifier. Dumping adjusting pin for 2Ach head amplifier. ...
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... Outputs signal obtained by mixing recording Y signal, recording 56 recording AFM signal and recording ATF signal. 8K 220µ 300µ — GND excluding recording and head amplifiers. —9— CXA1702AR Description path. Input Pin 54 path. Input Pin 56 with external chroma signal, pin ...
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... Same as for Pin 21. —10— CXA1702AR Description Pin for external reference current source. Connect external resistor 15k between this pin and GND. Be careful not to cause cross talk. 58 15K IR1 Pin for external reference current source ...
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... Mu … Playback signal is muted during PCM after-recording and, at the same time, RFAGC gain is held. —15— CXA1702AR Playback Operation Mode Video REC ...
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... No and 26. In the other measurement items, set the voltage back to Pin 8 (YLEV_MTG) = Vylev. (See the Control Logic Truth Table.) REC PCM after-recording — PCM after-recording H — 32µA/µs 17µA/µs 32µA/µs 32µA/µs —16— CXA1702AR DECK PCM after-recording O L 32µA/µs 17µA/µs 32µA/µs 32µA/µs ...
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... GND GND GND 0.01µ GND GND —17— CXA1702AR GND GND GND AFREC AFREC 51 ATFIN 0.01µ ATFIN PCMPEC PCMPEC 51 PCMIN 0.01µ PCMIN 0.1µ VG2 10µ 18k IR IR1 15k GND RECVTR ...
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... The playback signal from the head is amplified with low noise and high gain. A feedback dumping circuit is incorporated to inhibit head resonance, and the peaking amount can be adjusted by external resistors connected to Pin 30 (PBDUMP1A), Pin 40 (PBDUMP1B), Pin 41 (PBDUMP2A) and Pin 51 (PBDUMP2B). During playback, the input capacitance is about 20 pF including that of the recording amplifier. —19— CXA1702AR ...
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... VG2 2.45 V and VREG 4.15 V are generated as a reference voltages used in the IC. VG2 cannot be used outside the IC. VREG cannot also be used outside the IC except for adjusting the dropout detection level at Pin 14 (DOCDET). Boost amount =6dB f 1 Center frequency f =8MHz 0 Q=f /( —20— CXA1702AR 3dB f 2 )=2.5 1 Frequency ...
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... For EVR adjustment at Pin 12 (RFAGCTC), control the input voltage in the range from 2 4. During normal playback, Pin 16 (RP_PB) is set H, and Pin 64 (AFREC) is set L. At this time, be careful that taking the signal H at Pin 62 (PCMREC) holds RFAGC gain. —21— CXA1702AR ...
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... Pin 6 (LOWLEVEL) voltage (V) (V Low-band signal GCA (video, chroma path) gain control –10 –15 –20 –25 – 4.75V Pin 6 (LOWLEVEL) voltage ( 4.75V) CC —22— CXA1702AR 4.75V, Pin 8 YLEV_ MTG = Vylev) CC ...
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... Pin 10 (REFV) voltage=4.45V 3.60V Pin 20 (MTF0) voltage (V) Middle tune boost amount control Pin 8 (YLEV_MTG) voltage ( Pin 29 (MTQ) voltage ( 4.75V 4.75V) CC —23— CXA1702AR Middle tune Q control 4.75V) CC ...
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... JEDEC CODE 64PIN LQFP (PLASTIC (0.22 0.08 0.18 – 0.03 0.127 – 0.02 + 0.2 1.5 – 0.1 NOTE: Dimension “ ” does not include mold protrusion. PACKAGE STRUCTURE PACKAGE MATERIAL LEAD TREATMENT LQFP-64P-L01 QFP064-P-1010-A LEAD MATERIAL PACKAGE WEIGHT —24— CXA1702AR + 0.05 0.1 EPOXY / PHENOL RESIN SOLDER PLATING 42 ALLOY 0.3g ...