Video ICs VCR audio signal processing system BH7775K The BH7775K is an audio signal processing system IC that includes a peak-noise reduction (PNR) processor, an FM modulator / demodulator circuit, an input / output switcher, an automatic FM detector circuit, an FM band-pass filter, a normal-audio circuit, a regulator circuit, and automatic adjusting circuits (VCO and BPF). Applications •VHS Video cassette recorders •1)Features Operates off dual ± power supply which allows a 2) 3) 4) 5) large reduction in the number of coupling capacitors required. A built-in regulator makes it easy to construct a power supply system. A built-in 2-wire serial control decoder circuit allows serial control of the internal mode settings. Automatic adjusting VCO and BPF circuits that use the color signal subcarrier frequency (NTSC: 3.579545MHz and PAL: 4.433619MHz) ensure stable adjustment that is not effected by stress when the chip is mounted, or variations over time. 4-input switcher (turner, BS, and line 1 and 2). Output switch with built-in STEREO / LEFT / RIGHT switching, Hi-Fi / MIX / NORMAL switching, and BS monitor functions. The PNR processor and FM modulation / demodulation circuit provide reverse characteristics at record- 6) 7) 8) 9) ing and playback. Also, carrier frequency adjustment and FM de-emphasis / playback level adjustment have been combined. Built-in FM band-pass filter connects directly to the playback amplifier and excels at attenuation of the other channel. The FM recording output circuit has a high-performance high-frequency cutoff filter that produces a sine wave output. Switching noise is reduced by a slope-control type differential compensation circuit. Built-in envelope detector circuit and noise-detecting automatic FM detector circuit. Built-in normal-audio signal processing circuit that allows SP / LP / EP equalizer switching. Control terminal provided for use with the BA7755AF high-voltage head switcher. 1 Video ICs BH7775K •Absolute maximum ratings (Ta = 25°C) Parameter Applied voltage Symbol Limits Unit VCC 23, 55 pin · · · · · · · · · · 6.0 V VEE 59 pin · · · · · · · · · · · · – 6.0 V VIN 7, 8, 22 pin · · · · · · · · · 6.5 V VIN Pin other than above · · · · 6.0 V Pd 800∗ mW Operating temperature Topr – 10 ~ + 70 °C Storage temperature Tstg – 55 ~ + 125 °C Power dissipation ∗ When IC is stand alone, reduced by 8.0mW for each increase in Ta of 1°C over 25°C. When mounted on a 90mm × 50mm, t = 1.6mm glass epoxy board, Pd = 1.3W (reduced by 13.0mW for each increase in Ta of 1°C over 25°C). 䊊Not designed for rediation resistance. •Recommended operating conditions (Ta = 25°C) Parameter Symbol Range Unit Power supply voltage UNREG-VCC + 7.0 ~∗ V Power supply voltage UNREG-VEE + 7.0 ~∗ V ∗ The built-in regulator in this IC outputs + 5.0V from pin 55, and - 5.0V from pin 59. The supply voltage range given above is the voltage to be applied to UNREG VCC and UNREG VEE pins in the measurement circuit to obtain regulator output. Therefore, the upper limit of the voltage range is set by the externally connected transistor that forms the regulator circuit, and not by the IC itself. Note, also, that the lower limit will change depending on the value of the resistor connected between the collector and base of the transistor. 2 Video ICs BH7775K GNN NA PB NFB PB EQ NA PB OUT NA PB IN NA ALC NA FB Hi-Fi IN R Hi-Fi OUT R NR TC R 46 45 44 43 42 41 40 39 38 37 36 RECAMP REC EQ EQ NR EMPH R NA HEAD IN 47 WTNG1 R HEAD EQ 48 WTNG2 R NA REC OUT •Block diagram 35 34 33 EQ 53 ERM 58 VEE 59 LINE1 R IN 60 LINE1 L IN 61 LINE2 R IN 62 LINE2 L IN 63 VREFP 64 FM BPF ENVE LOPE MODEM DATA DECODER INPUT SWITCH PNR 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 NR EMPH L 57 D.O. COM. WTNG2 L GND REC WTNG1 L 56 NR TC L ERP DATA 55 GNDD Vcc Hi-Fi DET TUNER M IN 54 ATT OUTPUT SWITCH LINE AMP TUNER L IN LINE OUT L SW MODEM LINE AMP TUNER R IN LINE OUT R 52 BS L IN MIX OUT AMP MIX AMP Hi-Fi OUT L 51 Hi-Fi IN L MIX ALC FSC IN 50 PNR CLOCK NA REC FB ALC PB ENVE OUT / ADJ FLAG / Hi-Fi DET 49 BS R IN REC EQ 32 DC FB R 31 VCO f0 ADJ R 30 DAC BF OUT R 29 GNMR 28 FM REC OUT 27 AUDIO HEAD SW PULSE IN 26 RHS CTRL 25 FM ALC 24 BPF f0 ADJ 23 VCB 22 MUTE CTRL 21 FM PB IN 20 GNML 19 DAC BF OUT L 18 VCO f0 ADJ L 17 DC FB L 3 Video ICs BH7775K •Pin descriptions Pin function - 1 / 2 Pin No. Pin name 2, 1 BS IN L, R 4, 3, 5 TUNER IN L, R, M 6 GNDD 7 DATA IN Serial control data input. 8 CLOCK IN Serial control clock input. 9 ENVE OUT / Hi-Fi DET / ADJ FLAG Pin voltage I / O circuit BS input (L and R). Function 0.0V 69.8kΩ TUNER input (L, R, and M). 0.0V 47.0kΩ Serial control GND. 0.0V — — B (PNP) — B (PNP) EE: 0.8V PB: 1.0V EE: 50kΩ PB, ADJ: EF (NPN) fsc input terminal for VCO and BPF adjustment. 0.0V 200kΩ Hi-Fi input for output switcher. 0.0V 47kΩ PNR audio output. 0.0V EF: (P-P) FM input Lch signal component envelope output. Hi-Fi DET output for FM input. ADJ FLAG output for ADJ. 10 FSC IN 11, 38 Hi-Fi IN L, R 12, 37 Hi-Fi OUT L, R 13, 36 NR TC L, R PNR attack and recovery time setting. Attack R: 530Ω, recovery R: 6.5kΩ. — 14, 35 WTNG1 L, R Waiting characteristic low-frequency time constant setting 0.0V 10kΩ 15, 34 WTNG2 L, R Waiting characteristic high-frequency time constant setting 0.0V 1.1kΩ 16, 33 NR EMPH L, R NR emphasis time constant setting. (external C = 0.01µF) 0.0V — 17, 32 DC FB L, R PNR operating reference potential. 0.0V 11.5kΩ 18, 31 VCO f0 ADJ L, R VCO control current setting terminal. 2.5V EF (NPN) 19, 30 VCO DAC BF OUT L, R VCO control DAC voltage output terminal . 1.4V EF (NPN) 20, 29 GND (GNM) L, R PNR, MODEM and BPF GND. L and R unconnected. 0.0V — Playback FM input. 660mVP-P Typ. No input coupling capacitor (GND to VCC). 0.0V 50kΩ 21 FM PB IN 22 MUTE CTRL 23 VCB 24 BPF f0 ADJ 25 FM ALC Line output mute control input. — 3kΩ (2.5V Min.) MODEM and BPF VCC. 5.0V — FM BPF center frequency adjustment. 1.9V EF (NPN) ~ 200Ω FM ALC time constant setting. 0.0V EF (NPN) ~ 2.5kΩ C (NPN) 26 RHS CTRL High-voltage head switch (BA7755) control terminal. — 27 AHSWP IN Audio head switching pulse input. — B (PNP) 28 FM REC OUT EE: 3.3V PB: 3.3V EF (NPN) ~ 200Ω EE: recording FM output. Sine wave output. PB: BPF output monitor terminal. Note) I / O circuit; EF: emitter follower, P-P: push pull, B: base, and C: collector. All numerical values are standardized values. 4 – 5.0V Video ICs BH7775K Pin function - 2 / 2 Pin No. Pin name 39 NA FB 40 41 NA PB IN 42 NA PB OUT 43 PB EQ 44 NA PB NFB 45 GNN 46 NA HEAD IN 47 HEAD EQ 48 NA REC OUT I / O circuit 0.0V 800Ω Normal line amplifier ALC time constant setting (attack and recovery time). 0.0V EF (NPN) ~ 500Ω Function Normal line amplifier playback input. 0.0V 105.2kΩ Normal PB amplifier output. 0.0V EF (P-P) ~ 50Ω Normal PB amplifier equalizer switch. 0.0V OPEN / 25Ω Normal PB amplifier feedback. 0.0V B (NPN) Normal audio GND. 0.0V — 0.0V REC: B (NPN) REC: EF (P-P) Head resonance equalizer switch terminal. 0.0V 300kΩ / 29Ω Normal REC amplifier output. 0.0V EF: (P-P) Recording equalizer setting resistor terminal. 0.0V 1kΩ Normal REC amplifier feedback terminal. 0.0V B (NPN) Normal audio playback input. 49 REC EQ 50 NA REC FB 51 MIX ALC ALC time constant setting for mixer amplifier (attack and recovery time). Mixer amplifier output for RF converter. 0.0V EF (NPN) Line output 0.0V 330Ω – 5.0V EF (NPN) ~ 500Ω 52 MIX OUT 54, 53 LINE OUT L, R 55 VCC VCC regulator. 5.0V — 56 ERP VCC regulator error output. 5.0V C (NPN) 57 GND Output switch, regulator GND. 58 ERM VEE regulator error output. – 5.0V VEE regulator – 5.0V 59 VEE 61, 60 LINE1 IN L, R LINE 1 input (L and R). 63, 61 LINE2 IN L, R 64 ∗ NA ALC Pin voltage Normal line amplifier feedback. VREFP 0.0V — C (PNP) — 0.0V 90.2kΩ LINE 2 input (L and R). 0.0V 90.2kΩ VCC / 2 reference voltage. With power on detect and precharge function. 2.5V 10kΩ I / O circuit; EF: emitter follower, P-P: push pull, B: base, and C: collector. All numerical values are standardized values. 5 Video ICs BH7775K Input / Output circuits •Equivalent circuits for the control and input / output circuits - (1) TUNER L, R, M (4, 3, 5pin) LINE1 L / R, LINE2 L / R (61, 60, 63, 62pin) Vcc Vcc – 2.0V – 2.0V 60.2k 4 61 [3, 5pin] [60, 63, 62pin] 2.0V 47k 2.0V 30k VEE GND VEE GND BS L, R (2, 1pin) LINE OUT (54, 53pin) Vcc Vcc 50 – 2.0V 25k 22.8k [53pin] 330 54 2 [1pin] 26k 2.0V 10.13k 50 47k 30k VEE GND MIX OUT (52pin) VEE GND FM REC OUT (28pin) Vcc 200 200 Vcc 200 52 5k 200 28 47k 5p VEE GND 6 8k VEE GND Video ICs BH7775K Equivalent circuits for the control and input / output circuits - (2) FM PB IN (21pin) NA PB IN (41pin) Vcc Vcc 3.5V 75.2k 20p 2k 50k 41 21 PB 12.5k 30k 100k PB VEE GND NA PB OUT (42pin) EE VEE GND NA PB NFB (44pin), NA HEAD IN (46pin) Vcc Vcc 200 46 44 42 50 100k 200 VEE VEE GND NR REC OUT (48pin), NA REC NFB (50pin) Vcc 200 SP: ON 10k 50 39k 48 50k 200 VEE GND 7 Video ICs BH7775K Equivalent circuits for the control and input / output circuits - (3) AUDIO HEAD SWITCH PULSE IN (27pin) ENVELOPE / Hi-Fi DET OUT (9 pin) Vcc Vcc PB 200 30k 27 30k 9 5k 50k VEE GND VEE GND RHS CTRL (26pin) MUTE CTRL (22pin) 26 22 Vcc Vcc 5k 51k 2.5V 200 10k 3k 16k 50k 10k VEE GND VEE GND DATA (7pin), CLOCK (8pin) FSC IN (10pin) Vcc Vcc [7pin] 10 10k 2k 8 200k 50k 3V VEE 8 VEE GND Video ICs BH7775K characteristics •• Electrical Unless otherwise noted, the following measurement conditions apply: UNREG – VCC = + 10V UNREG – VEE = – 10V Ta = 25°C ∗ With regard to the control voltages, refer to the mode holding voltage range given in p.141. Output switch control (W1 bit 4, W1 bit 3 and W1 bit 2) BS Through control (W1 bit 1) LINE AMP gain (W3 bit 4 and W3 bit 3) FM output control (W2 bit 5) FM OUT switch control (W2 bit 4, W2 bit 3 and W2 bit 2) NTSC / PAL control (W2 bit 0) Recording MUTE (W2 bit 1) SP / EP control (W1 bit 5) FM detector level control (W4 bit 7, W4 bit 6) ENVE characteristic control (W4 bit 5, W4 bit 4) MUTE CTRL (pin 22) LINE MUTE (W1 bit 0) STEREO : OFF : Standard ( + 10.6dB) : FM output on : FM REC output MIX ration ( – 10.0dB) : NTSC : Recording MUTE : SP : Standard : FNORM detector, no ENVE output : L (MUTE) : L (MUTE) MODEM carrier frequency NTSC L channel 1.30MHz, PAL Lch 1.40MHz MODEM carrier frequency NTSC R channel 1.70MHz, PAL Rch1.80MHz Color signal subcarrier frequency NTSC 3.579545MHz, PAL 4.433619MHz Signal frequency f = 1kHz • Input condition 1 TU input VIN = – 20.0dBV, • Input condition 2 TU input VIN = – 10.6dBV, • Input condition 3 TU input VIN = – 15.0dBV, • Input condition 4 TU input VIN = – 5.0dBV, LINE1 / LINE2 input VIN = – 10.0dBV, LINE1 / LINE2 input VIN = – 0.6dBV, LINE1 / LINE2 input VIN = – 5.0dBV, LINE1 / LINE2 input VIN = + 5.0dBV, BS input VIN = – 16.0dB BS input VIN = – 6.6dB BS input VIN = – 11.0dB BS input VIN = – 1.0dB ∗ 1 B.W. = 0.4 to 30kHz ∗ 2 DIN AUDIO ∗ Refer to Fig. 1 for the measurement circuit. Parameter Symbol Min. Typ. Max. Unit Conditions Quiescent Current (positive supply) EE Iqp EE 29.0 38.6 51.3 mA EE mode, no input, after carrier frequency adjustment. Quiescent Current (positive supply) PB Iqp PB 40.3 53.7 71.4 mA PB mode, no input, FNORM, BPF, after carrier frequency adjustment. Quiescent Current (negative supply) EE IqM EE – 22.1 – 16.6 – 12.5 mA EE mode, no input, after carrier frequency adjustment. Quiescent Current (negative supply) PB IqM PB – 23.9 – 18.0 – 13.5 mA PB mode, no input, FNORM, BPF, after carrier frequency adjustment. [REGULATOR] Regulator input voltage (+) VCC 4.69 5.04 5.39 V Regulator input voltage (–) VEE – 5.37 – 5.02 – 4.67 V 9 Video ICs Parameter BH7775K Symbol Min. Typ. Max. Unit Conditions [Hi-Fi EE THROUGH] (INPUT: TU IN L / R, LINE1 IN L / R , LINE2 IN L / R, BS IN L / R OUTPUT: LINE OUT L / R) 〈MANUAL MODE〉 Line output level VOEE – 10.6 – 9.4 – 8.2 dBV Input condition 1 Channel balance (L / R) CBEE – 0.8 0.0 0.8 dB Input condition 1 Input condition 1∗1 Distortion THDEE — 0.017 0.10 % Maximum output level VOMEE 9.0 10.7 — dBV THD = 1%,∗1 Output residual noise VONEE — – 93.0 – 86.0 dBV Relevant input shorted to GND,∗2 Crosstalk CTEE — – 75.0 dBV Relevant input: shorted to GND Non-relevant input: Input condition2,∗2 Muting level MTEE — – 105 – 95 dBV Input condition 2∗2 Switching DC offset ∆VMODE — 8.0 22 mV (LINE OUT) ST / L / R / N, MIX ON / OFF Mode switching operating point voltage difference. dBV VIN = – 16.0dBV — [BS THROUGH] (INPUT: BS IN L / R OUTPUT: LINE OUT L / R) Output level VOBS – 10.5 – 9.3 – 8.1 Distortion THDBS — 0.006 0.08 Output residual noise VONBS — – 96.0 – 86.0 % dBV VIN = – 16.0dBV,∗1 ∗2, Connect BS IN to GND. [LINE AMP] (INPUT: Hi-Fi IN L / R OUTPUT: LINE OUT L / R) Line amplifier gain 1 VOLINE1 + 10.0 + 10.6 + 11.2 dB VIN = – 20.0dBV Line amplifier gain 2 VOLINE2 + 11.2 + 11.8 + 12.4 dB VIN = – 20.0dBV Line amplifier gain 3 VOLINE3 + 13.1 + 13.7 + 14.3 dB VIN = – 20.0dBV [MIX AMP] (INPUT: TU IN L / R, LINE1 IN L / R, LINE2 IN L / R, BS IN L / R OUTPUT: MIX OUT) Output level VOMIX – 9.4 – 8.2 Distortion THDMIX – 10.6 — 0.08 0.50 MIX ALC level VALCMIX – 4.4 – 2.9 – 1.4 dBV % dBV Input condition 1, simultaneous L & R input Input condition 1, simultaneous L & R input∗1 Input condition 2, simultaneous L & R input [NORMAL EE THROUGH] (INPUT: TU IN M, TU IN L / R, LINE1 IN L / R, LINE2 IN L / R, BS IN L / R OUTPUT: LINE OUT L / R) Output voltage level VOEE – 11.6 – 10.4 – 9.2 0.039 0.10 dBV Input condition 1 Input condition 1,∗1 Distortion THDEEN — Output residual noise VONEEN — – 81.5 – 71.3 dBV Rg = 1kΩ,∗2 VALCN1 – 8.9 – 7.4 – 5.9 dBV Input condition 4 ALC level 1 ALC distortion THDALCN — 0.045 0.15 % % Input condition 4,∗1 [NORMAL REC AMP] (INPUT: TU IN M, TU IN L / R, LINE1 IN L / R, LINE2 IN L / R, BS IN L / R OUTPUT: NA REC OUT) Output voltage level VORECN – 9.6 – 8.1 – 6.6 dBV Input condition 1 Input condition 1,∗1 THDRECN — 0.079 0.20 % Maximum output level VOMRCN 7.0 9.2 — dBV THD = 1%,∗1, ALC OFF Output level for EE MTRECN — – 94.0 dBV Input condition 2,∗2, EE MODE, ALC OFF Distortion 10 – 70.0 Video ICs Parameter BH7775K Symbol Min. Typ. Max. Unit Conditions [NORMAL PB AMP] (INPUT: NA HEAD IN, OUTPUT: LINE OUT) Output voltage level VOPSN – 13.4 – 11.6 – 9.8 dB VIN = – 70dBV % VIN = – 70dBV,∗1 Distortion THDPBN — 0.19 0.40 Output residual noise VONPBN — – 63.6 – 55.0 Open loop gain (PB PRE AMP) GVPBNOR 58.0 66.7 — dB VIN = – 70dBV OUTPUT: NA PB OUT dBV Rg = 1k Ω,∗2 [EQ SWITCH] REC FB resistance SP RREC SP 8.3 10.0 11.7 kΩ SP MODE REC FB resistance EP RREC SP 40.7 49.0 57.3 kΩ EP MODE REC EQ resistance RREC EQ 0.83 1.00 1.17 kΩ Resistor connected between pin 49 and GND. REQ PB — 25 50 Ω SP MODE REQ HEAD — 29 50 Ω EP MODE RHS control current IIN RHS 98 118 140 µA RHS control leakage current IL RHS — — 1 µA PB EQ SW impedance HEAD EQ SW impedance [RHS CONTROL] [PNR ENCODE MODE] Encode output level VOENC – 17.0 – 15.7 – 14.4 dBV Compression characteristic CMP – 26.4 – 24.7 – 23.0 dB TU input VIN = – 20dBV→ – 70dBV output level difference. — 0.17 0.37 % Input condition 1,∗1 — – 56.5 – 51.5 dBV – 9.4 – 7.6 dBV Encode distortion Output residual noise THDEND VONEC Input condition 1 Connect the pertinent input to GND,∗2 [PNR DECODE MODE] Output voltage level VODEC – 11.2 VIN = – 15.7dBV Expansion characteristic EXP – 52.4 – 50.2 – 48.0 dB VIN = – 15.7dBV→ – 40.7dBV output level difference. Time constant setting resistor RDET 5.10 6.15 7.20 kΩ Resistance value connected between pins 13 and 36 and VEE. (when VCCS and VEES applied) 11 Video ICs BH7775K Parameter Symbol Min. Typ. Max. Unit Conditions [MODEM REC MODE] (INPUT: TUNER IN L / R, LINE1 IN L / R, LINE2 IN L / R, BS IN L / R, OUTPUT: FM REC OUT L / R) Carrier frequency NTSC Carrier frequency PAL Frequency deviation Maximum frequency deviation FM output level Carrier 2nd harmonic Carrier 3rd harmonic Lch fNOL 1.2950 1.3000 1.3050 MHz Rch fNOR 1.6950 1.7000 1.7050 MHz Lch fPOL 1.3945 1.4000 1.4055 MHz Rch fPOR 1.7935 1.7990 1.8045 MHz Lch DEVL 45.5 51.5 57.5 ± kHz Rch DEVR 45.0 51.0 57.0 ± kHz No input, VCC stable, after automatic adjustment fSC = 3.579545MHz VIN = 150 ~ 500mVP-P No input, VCC stable, after automatic adjustment fSC = 4.433619MHz VIN = 150 ~ 500mVP-P Input condition 1 Lch DEVMax.L 116 138 160 ± kHz Rch DEVMax.R 116 138 160 ± kHz Lch VOFML 320 365 420 mVP-P FM OUT SW: FM L mode Rch VOFMR 325 370 425 mVP-P FM OUT SW: FM R mode Lch f2L — – 53.0 – 40.0 dB Rch f2R — – 48.0 – 40.0 dB Lch f3L — – 52.0 – 40.0 dB Rch f3R — – 55.0 – 42.0 dB 3rd stage harmonics and fundamental harmonics spectral ratio Lch: FM L mode, Rch: FM R mode – 10.2 – 8.4 dB 1.3MHz / 1.7MHz spectrum ratio. FM MIX ratio (FM MIX1 mode) fLR – 12.0 Input condition 4 (f = 10kHz) 2nd stage harmonics and fundamental harmonics spectral ratio Lch: FM L mode, Rch: FM R mode [MODEM PB MODE] (INPUT: FM PB IN, OUTPUT: LINE OUT L / R) Carrier frequency, after BPF fo adjustment, VIN = 660mVP-P, 1.30MHz, 1.70MHz MIX IN Demedulation output level Demedulation output level 2 Demedulation distortion Demedulation SW noise level Demedulation noise level Lch VODL – 11.5 – 9.3 – 7.1 dBV DEVL = ± 50.0kHz, f = 1kHz Rch VODR – 11.5 – 9.3 – 7.1 dBV DEVR = ± 50.0kHz, f = 1kHz Lch VODL2 VODL – 10.0 VODL – 7.5 VODL – 5.0 dBV DEVL = ± 50.0kHz, f = 10kHz Rch VODR2 VODR – 10.0 VODR – 7.5 VODR – 5.0 dBV DEVR = ± 50.0kHz, f = 10kHz Lch THDDL — 0.12 0.35 % DEVL = ± 50.0kHz, f = 1kHz,∗1 Rch THDDR — 0.13 0.35 % DEVR = ± 50.0kHz, f = 1kHz,∗1 Lch VODSWL — — — dBV Rch VODSWR — — — dBV Lch VONDL — – 85.0 dBV Rch VONDR — – 95.0 – 95.0 – 85.0 dBV f = 10kHz, AUDIO H. SW. P = – Hz 5VP-P rectangular-waveform input. After 10kHz TRAP passes DEV. = ± 25.0kHz∗2 Unmodulated ∗2 [Recording→ playback total characteristics] (EE · · · INPUT: LINE IN L / R, OUTPUT: LINE OUT L / R) (PB · · · INPUT: FM PB IN, OUTPUT: LINE OUT L / R) Line output recording / playback level difference Lch VRPL – 1.2 0.0 + 1.2 dB Rch VRPR – 1.2 0.0 + 1.2 dB EE mode: VIN = – 10.0dBV after carrier frequency adjustment. PB mode: Input FM PB IN = 660mVP-P, f = 1.30MHz, 1.70MHz 1: 1 MIX, after BPF center frequency adjustment. Inpu DEV = DEVL,R (frequency deviation given above). EE / PB line out level difference. 12 Video ICs Parameter BH7775K Symbol Min. Typ. Max. Unit Conditions [FM BPF] (INPUT: FMPB IN, OUTPUT: BPF MONITOR L / R) VCC stable, after automatic adjustment BPF L / R level difference NTSC ∆VBPFN – 5.0 0.0 5.0 dB f = 1.505MHz, VIN = 200mVP-P BPF L / R level difference PAL ∆VBPFP – 5.0 0.0 5.0 dB f = 1.605MHz, VIN = 200mVP-P 〈LcH, RcH mix input signal〉 660mVP-P (RATIO 1: 1), FM ALC ON 〈NTSC Lch〉 1.30MHz insertion loss ATTNLC – 14.2 – 11.1 – 8.1 dB 1.30MHz + 1.70MHz 1.15MHz attenuation ATTNL 1.15 ATT NLC – 9.5 ATTNLC – 5.0 ATTNLC – 2.0 dB 1.15MHz + 1.70MHz 1.45MHz attenuation ATTNL 1.45 ATT NLC – 8.6 ATTNLC – 5.0 ATTNLC – 2.0 dB 1.45MHz + 1.70MHz 1.70MHz attenuation ATTNL 1.70 — — ATT NLC – 30.0 dB 1.30MHz + 1.70MHz – 9.3 dB 1.30MHz + 1.70MHz 〈NTSC Rch〉 – 12.3 1.70MHz insertion loss ATTNRC – 15.5 1.55MHz attenuation ATT NR 1.55 ATTNRC ATTNRC ATTNRC – 8.3 – 4.7 – 1.9 dB 1.55MHz + 1.30MHz 1.85MHz attenuation ATTNR 1.85 ATTNRC ATTNRC ATTNRC – 10.6 – 5.4 – 1.6 dB 1.85MHz + 1.30MHz 1.30MHz attenuation ATTNR 1.30 ATTNRC – 30.0 dB 1.30MHz + 1.70MHz – 6.7 dB 1.40MHz + 1.80MHz — — 〈PAL Lch〉 1.40MHz insertion loss ATTPLC 1.25MHz attenuation ATTPL 1.25 — ATT PLC – 5.0 — dB 1.25MHz + 1.80MHz 1.55MHz attenuation ATTPL 1.55 — ATT PLC – 5.2 — dB 1.55MHz + 1.80MHz 1.80MHz attenuation ATTPL 1.80 — — ATTPLC – 30.0 dB 1.40MHz + 1.80MHz – 8.6 dB 1.40MHz + 1.80MHz – 1.28 – 9.7 〈PAL Rch〉 – 11.6 1.80MHz insertion loss ATTPRC 1.65MHz attenuation ATTPR 1.65 — ATTPRC – 4.6 — dB 1.65MHz + 1.40MHz 1.95MHz attenuation ATTPR 1.95 — ATTPRC – 5.3 — dB 1.95MHz + 1.40MHz 1.40MHz attenuation ATTPR 1.40 — — ATT PRC – 30.0 dB 1.40MHz + 1.80MHz – 14.8 13 Video ICs Parameter BH7775K Symbol Min. Typ. Max. Unit Conditions VDDO 77.0 83.0 89.0 dBµ Input level to give DO due to attenuation. 110 125 140 ms FM PB IN (1.3MHz, 1.7MHz, 1: 1 MIX) time from 660mVP-P input to ENVE OUT rise. Audio head pulse in: f = 30Hz, 5VP-P rectangular waveform. [DO detect circuit] DO detector level [FNORM to Hi-Fi return delay circuit] Return delay time τFNDLY [Envelope output circuit] (INPUT: FM PB IN, OUTPUT: ENVE OUT) 0dB = 660mVP-P, 1.3MHz & 1.7MHz MIX IN Envelope output level SP0 VENVSP0 — 0 100 mV No signal, SP MODE Envelope output level SP1 VENVSP1 2.22 2.72 3.22 V VIN = 0dB, SP MODE Envelope output level SP2 VENVSP2 3.70 3.95 4.20 V VIN = + 10dB, SP MODE Envelope output level EP1 VENVEP1 2.18 2.68 3.18 V VIN = – 4dB, EP MODE Hi-Fi DET output DC FNORMAL VHDETL — 0 100 mV No signal Hi-Fi DET output DC HiFi VHDETH 3.50 4.00 — V VIN = 0dB Audio head switch pulse threshold voltage VTHHOLD 1.66 2.66 3.66 V Hysteresis (0.5V) Hold pulse width ∆τHOLD 6.47 7.77 9.07 µs [Hold pulse circuit] [Voltage for preserving the control system mode] 〈CLOCK IN〉 L mode holding voltage VH8L 0.0 — 0.5 V H mode holding voltage VH8H 2.5 — VCC V L mode holding voltage VH7L 0.0 — 0.5 V H mode holding voltage VH7H 2.5 — VCC V MUTE holding voltage VH22L 0.0 — 1.0 V DC MUTE holding voltage VH22H 3.9 — VCC V 〈DATA IN〉 MUTE CTRL 14 A VEE 4.7k 54 53 4.7µ 64 63 62 61 59 100µ 60 58 57 55 100µ 56 1500p 1500p 52 51 1 2 REC MIX AMP 3 45 4 5 LINE AMP LINE AMP 44 PB INPUT SWITCH EQ 46 6 42 8 7 9 ATT ALC 40 VEE 47k DATA DECODER OUTPUT SWITCH SW 41 0.1µ AMP EQ 43 0.2k 100µ DATA 1k 4.7k 4.7k 4.7k 4.7k 4.7k 4.7k 4.7k 4.7k V V 47µ RECAMP REC EQ 47 500 330k 12k 0.01µ CLOCK 1k 1k 1k 1k 1k 1k 1k 1k VEE 50 49 48 V 1k NAME AOIN V 12 3.3µ 11 10 37 3.3µ 38 39 33µ 1M FSCIN TUNER M IN VEE 4.7k 4.7k 22k 22k 22k 2.2M V NAME COUI VEE 14 16 ENVEOUT/ADJFLAG Hi-FiDET 0.01µ 0.022µ 15 PNR 33 ENVE LOPE FM BPF VEE 4.7µ 10µ 13 MODEM D.O. COM. Hi-Fi DET 34 0.01µ 0.022µ PNR 35 4.7µ MODEM 36 10µ Hi-FiINL 1k TUNER L IN TUNER R IN BS L IN BS R IN LINE2 L IN LINE2 R IN LINE1 L IN LINE1 R IN A UNREG VCC UNREG VEE VCC LINE OUT L LINE OUT R MIX OUT 1200p 0.01µ A 22k 330 500 22µ 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 A 0.022µ 10k 33µ 47k 27k 25.3k 47k 27k 33µ FM REC OUT 50 FM PB IN MUTE CTRL 10k AUDIO HEAD SWITCH PULSE IN 0.01µ Video ICs BH7775K •Measurement circuit Fig.1 15 16 Fig.2 VEE TUNER M IN TUNER L IN TUNER R IN BS L IN BS R IN LINE2 L IN LINE2 R IN LINE1 L IN LINE1 R IN 4.7k 4.7k 4.7k 4.7k 4.7k 4.7k 4.7k 4.7k 22k 1 2 3 4 UNREG VEE UNREG VCC VCC VEE 100µ 100µ 4.7µ 1500p 1500p 47µ 2.2M 1200p 64 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49 47 1 2 REC MIX AMP RECAMP REC EQ 48 3 45 4 5 6 8 DATA DECODER 7 ALC 40 VEE 9 SW ATT 41 OUTPUT SWITCH AMP EQ LINE AMP LINE AMP PB 44 INPUT SWITCH EQ 46 100µ 0.1µ 8.2k 43 42 330k 12k 0.01µ 10 D.O. COM. Hi-Fi DET VEE 10µ 13 34 15 16 4.7µ 0.01µ 0.022µ 14 PNR 33 ENVE LOPE FM BPF PNR 35 4.7µ 0.01µ 0.022µ MODEM 12 3.3µ 11 36 10µ VEE MODEM 37 3.3µ 38 33µ 39 1M 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33µ 47k 27k 25.3k 47k 27k 33µ FM PB IN MUTE CTRL DATA CLOCK ENVELOPE/Hi-Fi DET OUT/ADJ FLAG FSCIN 0.022µ AUDIO HEAD SWITCH PULSE IN FM REC OUT P/R CTRL •Application example LINE L OUT LINE R OUT BA7755 0.01µ 8 7 6 5 MIX OUT BIAS OSC 330 22µ Video ICs BH7775K Video ICs BH7775K •Electrical characteristic curve –5 Lchannel – 10 Rchannel GAIN: GV (dB) – 15 – 20 – 25 – 30 – 35 – 40 – 45 – 50 – 55 0.75 0.90 1.05 1.20 1.35 1.5 1.65 1.80 1.95 2.10 2.25 FREQUENCY: f (MHz) Fig. 3 FM BPF frequency characteristics (NTSC) •External dimensions (Units: mm) 16.4 ± 0.3 14.0 ± 0.2 48 33 32 17 64 0.05 1 2.7 ± 0.1 0.5 14.0 ± 0.2 16.4 ± 0.3 49 0.8 16 0.15 ± 0.1 0.35 ± 0.1 0.15 QFP-A64 17