AN3336

ICs for VCR AN3336SB 4-Head VCR Recording/Playback Amplifier IC s Overview The AN3336SB is a recording/playback amplifier IC for 4-head VCR. It includes RF-AGC, automatic tracking I/O, and envelope comparing circuit. 0.3±0.11 1 36 Unit : mm s Features • Playback VCC = 5.0V, recording VCC = 12V • Built-in RF-AGC circuit • Built-in automatic tracking I/O circuit • Built-in envelope comparing circuit 0.8 18 19 1.3±0.25 0.1 0.2 + 0.05 – 0.1±0.1 0.5 8.4±0.30 11.93±0.30 36-Pin SSOP package (SSOP036-P-0450A) s Pin Descriptions Pin No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 Pin name Head switching Envelope ON/OFF switching Ch 1 head amp. damping Ch 1 head amp. input Small-signal ground Ch 2 head amp. input Ch 2 head amp. damping Sub-ground Sub-ground Ch 3 head amp. damping Ch 3 head amp. input Small-signal ground Ch 4 head amp. input Ch 4 head amp. damping Rec. current amp. (LP) output Rec. feedback Rec. current amp. (SP) output Rec. VCC Pin No. 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 Pin name Evelope detector capacitor for ch 3 and ch 4 Peaking for recording Automatic tracking output Automatic tracking detector capacitor Automatic tracking control Automatic tracking VCC Rec. Y–input Chroma output Sub-ground Sub-ground Sub-ground Recording C–input AGC output AGC detector capacitor Envelope detector capacitor for ch 1 and ch 2 Head amp. switching ENV output, recording bias Playback VCC 1.3±0.25 (0.28) 2.85±0.2 15.2±0.30 1 AN3336SB s Block Diagram PB 5V VCC ICs for VCR + HASW ENV C– IN Y– IN AT GCA AT OUT SUB– GND MAIN– GND 1.5kΩ 0.1µF 0.01µF 0.1µF 33kΩ 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 20 19 Det. AGC CHROMA Amp. Det. LOG Mix. Comp. Det. SP L H Det. LP H L Rec Logic H L L H LP SP HA1 HA2 HA3 HA4 PB ON PB ON 1 2 3 + 1µF 4 5 6 7 + 1µF 8 9 10 1µF 11 12 13 14 + 1µF 15 0.1µF 16 17 18 + 0.01µF 0.01µF + 0.01µF 0.01µF 0.01µF 0.1µF * HSW 100Ω * 100Ω SUB–GND * 100Ω * 100Ω 250 Ω * 250 Ω * Rec VCC 12V ENV OFF H Note) The resistance of notation* should be between 0 and 500 ohms. s Absolute Maximum Ratings Parameter Supply voltage (1) Supply current (2) Power dissipation Note 2) Operating ambient temperature Note 1) Storage temperature Note 1) Symbol PB VCC Rec VCC PD Topr Tstg Rating 6 13 440 –20 to +70 –55 to +125 Unit V V mW ˚C ˚C Note 1) Ta=25˚C for except ambient temperature and storage temperatures. Note 2) Allowable power dissipation of the package at Ta=70˚C. 2 ICs for VCR s Recommended Operating Range (Ta=25˚C) Parameter Operating supply voltage range (1) Operating supply voltage range (2) Symbol PBVCC RecVCC Range 4.5V to 5.5V 8.5V to 12.5V AN3336SB s Electrical Characteristics (Ta=25±2˚C) Parameter PB circuit current CH 1 gain CH 2 gain CH 3 gain CH 4 gain HSW change-over sensitivity HASW change-over sensitivity AGC output amplitude AGC control sensitivity HSW DC unbalance (I) HSW DC unbalance (II) HASW DC unbalance (I) HASW DC unbalance (II) Input conversion noise (1) Input conversion noise (2) Input conversion noise (3) Input conversion noise (4) Auto-tracking output at no-input Auto tracking max. output ENV output amplitude Rec. circuit current SP Y–Rec. current output LP Y–Rec. current output ratio SP 8MHz f characteristics ratio LP 8MHz f characteristics ratio Rec. chroma output ratio PB circuit current CH 1 gain CH 2 gain CH 3 gain CH 4 gain AGC output amplitude Rec circuit current SP Y–Rec. current output Rec. chroma output ratio Rec. current 2nd harmonics distortion Cross-modulation relative level Auto tracking SP output voltage (1) Auto tracking SP output voltage (2) Symbol I36 G4–26 G6–26 G11–26 G13–26 S1 S34 V4–31 ∆V4–31 HSW26 (I) HSW26 (II) HASW26 (I) HASW26 (II) N4–26/G4–26 N6–26/G6–26 N11–26/G11–26 N13–26/G13–26 V21min. V21max. V35 I18 I17 I15/I17 I17H/I17 I15H/I15 I17C/I17 I36 G4–26 G6–26 G11–26 G13–26 V4–31 I18 I17 I17C/I17 D2f DM V21SP1 V21SP2 PB VCC=5V PB VCC=5V PB VCC=5V PB VCC=5V PB VCC=5V PB VCC=5V PB VCC=5V PB VCC=5V PB VCC=5V PB VCC=5V PB VCC=5V PB VCC=5V PB VCC=5V PB VCC=5V PB VCC=5V PB VCC=5V PB VCC=5V PB VCC=4.8V PB VCC=4.8V PB VCC=5V Rec VCC=12V Rec VCC=12V Rec VCC=12V Rec VCC=12V Rec VCC=12V Rec VCC=12V PB VCC=5V PB VCC=5V PB VCC=5V PB VCC=5V PB VCC=5V PB VCC=5V Rec VCC=12V Rec VCC=12V Rec VCC=12V Rec VCC=12V Rec VCC=12V PB VCC=4.8V, Vin=400mVP–P PB VCC=4.8V, Vin=100mVP–P PB VCC=4.8V (3.4) (1.5) (0.1) 17 – 2.5 –4 –4 –15 (43) (57) (57) (57) (57) (200) (33) (12) (–12) (– 43) (– 48) (3.9) (2.5) (0.5) –7 3.8 3.5 48 32 2.5 130 53 53 53 53 Condition min typ max 56 61 61 61 61 3.8 3.8 270 3.0 100 100 100 100 1.0 1.0 1.0 1.0 1.0 Unit mA dB dB dB dB V V mVP–P dB mVP–P mVP–P mVP–P mVP–P µVrms µVrms µVrms µVrms V V VP–P mA mAP–P dB dB dB dB mA dB dB dB dB mVP–P mA mAP–P dB dB dB V V V Auto tracking LP output voltage difference V21LP–V21SP2 Note) The characteristics value in parentheses is not a guaranteed value, but reference one on design. 3 AN3336SB s Functional Descriptions 1. Playback mode • Pin36 (playback VCC) = 5V typ. (Pins15 and 17 are grounded internally) • Pin18 (recording VCC) = open (1) Selecting a head amplifier output channel ICs for VCR Channel Input pin Head SW Pin1 HASW Pin34 1 SP 2 3 LP 4 4 6 11 13 H L L H L L H H (2) Starting the envelope comparator Env. ON/OFF SW Pin2 Env. comparator Open Inactive Low (special playback) Active (3) Automatic tracking interface Pin24 (automatic tracking VCC) = 5V typ. • When the SP mode of the automatic tracking interface switches to the LP mode, the gain of the amplifier increases 5.5dB. • When the gain control voltage at Pin23 increases, the gain of the circuit increases. HASW(Pin24) High Low Automatic tracking LP SP 4 ICs for VCR 2. Recording mode Pin18 (recording VCC) =12V typ. Pin36 (playback VCC) Pin24 (automatic tracking VCC) AN3336SB } Opened or grounded Pin35 : Recording internal bias current control How to control : 35 R • When the external resistance decreases, the internal circuit bias current (Itotal) increases. • R should be 27 to 33kΩ. HASW control at Pin34 HASW Pin34 H L SP output OFF active LP output active OFF Pin11,13 GND Diode Pin4,6 Diode GND Pin19 Open GND s Reference PD—Ta 2.000 1.800 1.600 Power dissipation PD (mW) 1.449 1.400 1.200 1.000 833 800 600 400 200 0 0 25 50 75 On glass-epoxy print board (50mm × 50mm × t 0.8mm) Rthj–a=69˚C/W PD=1449mW(25˚C) IC without heatsink Rthj–a=120˚C/W PD=833mW (25˚C) 100 125 150 Ambient temperature Ta (˚C) 5