View BH7775K_1040009.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

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 recorders VHS Video cassette *Features off dual power supply which allows a 1) Operates
2) 3) 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 record6) 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.
7) 8) 9)
4)
5)
1
Video ICs
BH7775K
*Absolute maximum ratings (Ta = 25C)
Parameter Symbol VCC
Applied voltage
Limits 23, 55 pin * * * * * * * * * * 6.0 59 pin * * * * * * * * * * * * - 6.0 7, 8, 22 pin * * * * * * * * * 6.5 Pin other than above * * * * 6.0
800
Unit V V V V mW C C
VEE VIN VIN
Power dissipation Operating temperature Storage temperature
Pd Topr Tstg
- 10 ~ + 70 - 55 ~ + 125
When IC is stand alone, reduced by 8.0mW for each increase in Ta of 1C over 25C. When mounted on a
90mm x 50mm, t = 1.6mm glass epoxy board, Pd = 1.3W (reduced by 13.0mW for each increase in Ta of 1C over 25C). Not designed for rediation resistance.
*Recommended operating conditions (Ta = 25C)
Parameter
Power supply voltage Power supply voltage
Symbol UNREG-VCC UNREG-VEE
Range + 7.0 ~ + 7.0 ~
Unit V 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
*Block diagram
NA REC OUT NA HEAD IN
HEAD EQ
48
47
46
45
44
43 EQ
42
41
40 ALC
39
38
37
36
35
34
33
REC EQ NA REC FB MIX ALC MIX OUT LINE OUT R LINE OUT L Vcc ERP GND ERM VEE LINE1 R IN LINE1 L IN LINE2 R IN LINE2 L IN VREFP
49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64
NR EMPH R 32
Hi-Fi OUT R
NA PB NFB
NA PB OUT
WTNG1 R
Hi-Fi IN R
NA PB IN
NR TC R
PB EQ
NA ALC
NA FB
GNN
WTNG2 R
RECAMP REC EQ
EQ
PB
DC FB R VCO f0 ADJ R DAC BF OUT R GNMR FM REC OUT AUDIO HEAD SW PULSE IN RHS CTRL FM ALC BPF f0 ADJ VCB MUTE CTRL FM PB IN GNML DAC BF OUT L VCO f0 ADJ L DC FB L
PNR
31 30 29 28 27 26 25
AMP MIX AMP LINE AMP LINE AMP
SW
ATT MODEM
OUTPUT SWITCH Hi-Fi DET
REC D.O. COM.
FM BPF
24 23 22
DATA DECODER
MODEM
ENVE LOPE
21 20 19
INPUT SWITCH PNR
18 17
1 BS R IN
2 BS L IN
3 TUNER R IN
4 TUNER L IN
5 TUNER M IN
6 GNDD
7 DATA
8 CLOCK
9 ENVE OUT / ADJ FLAG / Hi-Fi DET
10 FSC IN
11 Hi-Fi IN L
12 Hi-Fi OUT L
13 NR TC L
14 WTNG1 L
15 WTNG2 L
16 NR EMPH L
3
Video ICs
BH7775K
*Pin descriptions
Pin function - 1 / 2 Pin No. 2, 1 4, 3, 5 6 7 8 9 10 11, 38 12, 37 13, 36 14, 35 15, 34 16, 33 17, 32 18, 31 19, 30 20, 29 21 22 23 24 25 26 27 28
Pin name Function BS input (L and R). TUNER input (L, R, and M). Serial control GND. Serial control data input. Serial control clock input. FM input Lch signal component envelope output. Hi-Fi DET output for FM input. ADJ FLAG output for ADJ. fsc input terminal for VCO and BPF adjustment. Hi-Fi input for output switcher. PNR audio output. PNR attack and recovery time setting. Attack R: 530, recovery R: 6.5k. Waiting characteristic low-frequency time constant setting Waiting characteristic high-frequency time constant setting NR emphasis time constant setting. (external C = 0.01F) PNR operating reference potential. VCO control current setting terminal. VCO control DAC voltage output terminal . PNR, MODEM and BPF GND. L and R unconnected. Playback FM input. 660mVP-P Typ. No input coupling capacitor (GND to VCC). Line output mute control input. MODEM and BPF VCC. FM BPF center frequency adjustment. FM ALC time constant setting. High-voltage head switch (BA7755) control terminal. Audio head switching pulse input. EE: recording FM output. Sine wave output. PB: BPF output monitor terminal. Pin voltage I / O circuit
BS IN L, R TUNER IN L, R, M GNDD DATA IN CLOCK IN ENVE OUT / Hi-Fi DET / ADJ FLAG FSC IN Hi-Fi IN L, R Hi-Fi OUT L, R NR TC L, R WTNG1 L, R WTNG2 L, R NR EMPH L, R DC FB L, R VCO f0 ADJ L, R VCO DAC BF OUT L, R GND (GNM) L, R FM PB IN MUTE CTRL VCB BPF f0 ADJ FM ALC RHS CTRL AHSWP IN FM REC OUT
0.0V 0.0V 0.0V -- -- EE: 0.8V PB: 1.0V 0.0V 0.0V 0.0V - 5.0V 0.0V 0.0V 0.0V 0.0V 2.5V 1.4V 0.0V 0.0V -- 5.0V 1.9V 0.0V -- -- EE: 3.3V PB: 3.3V
69.8k 47.0k -- B (PNP) B (PNP) EE: 50k PB, ADJ: EF (NPN) 200k 47k EF: (P-P) -- 10k 1.1k -- 11.5k EF (NPN) EF (NPN) -- 50k 3k (2.5V Min.) -- EF (NPN) ~ 200 EF (NPN) ~ 2.5k C (NPN) B (PNP) EF (NPN) ~ 200
Note) I / O circuit; EF: emitter follower, P-P: push pull, B: base, and C: collector. All numerical values are standardized values.
4
Video ICs
BH7775K
Pin function - 2 / 2 Pin No. 39 40 41 42 43 44 45 46 47 48 49 50 51 52 54, 53 55 56 57 58 59 61, 60 63, 61 64
Pin name Function Normal line amplifier feedback. Normal line amplifier ALC time constant setting (attack and recovery time). Normal line amplifier playback input. Normal PB amplifier output. Normal PB amplifier equalizer switch. Normal PB amplifier feedback. Normal audio GND. Normal audio playback input. Head resonance equalizer switch terminal. Normal REC amplifier output. Recording equalizer setting resistor terminal. Normal REC amplifier feedback terminal. ALC time constant setting for mixer amplifier (attack and recovery time). Mixer amplifier output for RF converter. Line output VCC regulator. VCC regulator error output. Output switch, regulator GND. VEE regulator error output. VEE regulator LINE 1 input (L and R). LINE 2 input (L and R). VCC / 2 reference voltage. With power on detect and precharge function. Pin voltage I / O circuit
NA FB NA ALC NA PB IN NA PB OUT PB EQ NA PB NFB GNN NA HEAD IN HEAD EQ NA REC OUT REC EQ NA REC FB MIX ALC MIX OUT LINE OUT L, R VCC ERP GND ERM VEE LINE1 IN L, R LINE2 IN L, R VREFP
0.0V 0.0V 0.0V 0.0V 0.0V 0.0V 0.0V 0.0V 0.0V 0.0V 0.0V 0.0V - 5.0V 0.0V 0.0V 5.0V 5.0V 0.0V - 5.0V - 5.0V 0.0V 0.0V 2.5V
800 EF (NPN) ~ 500 105.2k EF (P-P) ~ 50 OPEN / 25 B (NPN) -- REC: B (NPN) REC: EF (P-P) 300k / 29 EF: (P-P) 1k B (NPN) EF (NPN) ~ 500 EF (NPN) 330 -- C (NPN) -- C (PNP) -- 90.2k 90.2k 10k
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 control and input / output circuits - (1) Equivalent circuits for the
TUNER L, R, M (4, 3, 5pin) LINE1 L / R, LINE2 L / R (61, 60, 63, 62pin)
Vcc - 2.0V 60.2k 4 [3, 5pin] 47k VEE GND 2.0V 61 [60, 63, 62pin] 2.0V 30k - 2.0V
Vcc
VEE GND
BS L, R (2, 1pin)
LINE OUT (54, 53pin)
Vcc - 2.0V 22.8k 2 [1pin] 2.0V 47k VEE GND 25k
Vcc 50 330 26k 10.13k 50 30k VEE GND [53pin] 54
MIX OUT (52pin)
FM REC OUT (28pin)
Vcc 200 200 52 5k 200
Vcc
200 28 8k VEE GND
47k 5p VEE GND
6
Video ICs
Equivalent circuits for the control and input / output circuits - (2)
FM PB IN (21pin) NA PB IN (41pin)
BH7775K
Vcc 3.5V 20p 2k 21 PB 12.5k 100k VEE GND 30k PB EE 75.2k 41
Vcc
50k
VEE GND
NA PB OUT (42pin)
NA PB NFB (44pin), NA HEAD IN (46pin)
Vcc 200 46
Vcc
50 200
42
44
100k VEE
VEE GND
NR REC OUT (48pin), NA REC NFB (50pin)
Vcc 200 SP: ON 10k 50 39k 50k 200 VEE GND 48
7
Video ICs
Equivalent circuits for the control and input / output circuits - (3)
AUDIO HEAD SWITCH PULSE IN (27pin) ENVELOPE / Hi-Fi DET OUT (9 pin)
BH7775K
Vcc PB 200 30k 27 5k 50k VEE GND 30k 9
Vcc
VEE GND
RHS CTRL (26pin)
MUTE CTRL (22pin)
26 Vcc
22 Vcc
5k
51k
10k 3k
200
2.5V
16k 50k VEE GND 10k VEE GND
DATA (7pin), CLOCK (8pin)
FSC IN (10pin)
Vcc
Vcc
[7pin] 10k 8 3V VEE 10
2k 200k 50k VEE GND
8
Video ICs
BH7775K
*Electrical characteristics the following measurement conditions apply: * Unless otherwise noted,
UNREG - VCC = + 10V UNREG - VEE = - 10V Ta = 25C 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, 1 B.W. = 0.4 to 30kHz 2 DIN AUDIO Refer to Fig. 1 for the measurement circuit. 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
Parameter [REGULATOR] Quiescent Current (positive supply) EE Quiescent Current (positive supply) PB Quiescent Current (negative supply) EE Quiescent Current (negative supply) PB Regulator input voltage (+) Regulator input voltage (-)
Symbol
Min.
Typ.
Max.
Unit
Conditions
Iqp EE Iqp PB IqM EE IqM PB VCC VEE
29.0 40.3 - 22.1 - 23.9 4.69 - 5.37
38.6 53.7 - 16.6 - 18.0 5.04 - 5.02
51.3 71.4 - 12.5 - 13.5 5.39 - 4.67
mA
EE mode, no input, after carrier frequency adjustment. PB mode, no input, FNORM, BPF, after carrier frequency adjustment. EE mode, no input, after carrier frequency adjustment. PB mode, no input, FNORM, BPF, after carrier frequency adjustment.
mA
mA
mA V V
9
Video ICs
Parameter Symbol Min. Typ. Max. Unit Conditions
BH7775K
[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 Channel balance (L / R) Distortion Maximum output level Output residual noise Crosstalk Muting level Switching DC offset VOEE CBEE THDEE VOMEE VONEE - 10.6 - 0.8 -- 9.0 -- -- -- -- - 9.4 0.0 0.017 10.7 - 93.0 -- - 105 8.0 - 8.2 0.8 0.10 -- - 86.0 - 75.0 - 95 22 dBV dB % dBV dBV dBV dBV mV Input condition 1 Input condition 1 Input condition 11 THD = 1%,1 Relevant input shorted to GND,2 Relevant input: shorted to GND Non-relevant input: Input condition2,2 Input condition 22 (LINE OUT) ST / L / R / N, MIX ON / OFF Mode switching operating point voltage difference.
CTEE MTEE VMODE
[BS THROUGH] (INPUT: BS IN L / R OUTPUT: LINE OUT L / R) Output level Distortion Output residual noise VOBS THDBS VONBS - 10.5 -- -- - 9.3 0.006 - 96.0 - 8.1 0.08 - 86.0 dBV % dBV VIN = - 16.0dBV 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 Line amplifier gain 2 Line amplifier gain 3 VOLINE1 VOLINE2 VOLINE3 + 10.0 + 11.2 + 13.1 + 10.6 + 11.8 + 13.7 + 11.2 + 12.4 + 14.3 dB dB dB VIN = - 20.0dBV VIN = - 20.0dBV 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 Distortion MIX ALC level VOMIX THDMIX VALCMIX - 10.6 -- - 4.4 - 9.4 0.08 - 2.9 - 8.2 0.50 - 1.4 dBV % dBV Input condition 1, simultaneous L & R input Input condition 1, simultaneous L & R input1 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 Distortion Output residual noise ALC level 1 ALC distortion VOEE THDEEN VONEEN VALCN1 THDALCN - 11.6 -- -- - 8.9 -- - 10.4 0.039 - 81.5 - 7.4 0.045 - 9.2 0.10 - 71.3 - 5.9 0.15 dBV % dBV dBV % Input condition 1 Input condition 1,1 Rg = 1k,2 Input condition 4 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 Distortion Maximum output level Output level for EE VORECN THDRECN VOMRCN MTRECN - 9.6 -- 7.0 -- - 8.1 0.079 9.2 - 94.0 - 6.6 0.20 -- - 70.0 dBV % dBV dBV Input condition 1 Input condition 1,1 THD = 1%,1, ALC OFF Input condition 2,2, EE MODE, ALC OFF
10
Video ICs
Parameter Symbol Min. Typ. Max. Unit Conditions
BH7775K
[NORMAL PB AMP] (INPUT: NA HEAD IN, OUTPUT: LINE OUT) Output voltage level Distortion Output residual noise Open loop gain (PB PRE AMP) [EQ SWITCH] REC FB resistance SP REC FB resistance EP REC EQ resistance PB EQ SW impedance HEAD EQ SW impedance [RHS CONTROL] RHS control current RHS control leakage current [PNR ENCODE MODE] Encode output level Compression characteristic Encode distortion Output residual noise [PNR DECODE MODE] Output voltage level Expansion characteristic Time constant setting resistor VODEC EXP RDET - 11.2 - 52.4 5.10 - 9.4 - 50.2 6.15 - 7.6 - 48.0 7.20 dBV dB k VIN = - 15.7dBV VIN = - 15.7dBV - 40.7dBV output level difference. Resistance value connected between pins 13 and 36 and VEE. (when VCCS and VEES applied) VOENC CMP THDEND VONEC - 17.0 - 26.4 -- -- - 15.7 - 24.7 0.17 - 56.5 - 14.4 - 23.0 0.37 - 51.5 dBV dB % dBV Input condition 1 TU input VIN = - 20dBV - 70dBV output level difference. Input condition 1,1 Connect the pertinent input to GND,2 IIN RHS IL RHS 98 -- 118 -- 140 1 A A RREC SP RREC SP RREC EQ REQ PB REQ HEAD 8.3 40.7 0.83 -- -- 10.0 49.0 1.00 25 29 11.7 57.3 1.17 50 50 k k k SP MODE EP MODE Resistor connected between pin 49 and GND. SP MODE EP MODE VOPSN THDPBN VONPBN GVPBNOR - 13.4 -- -- 58.0 - 11.6 0.19 - 63.6 66.7 - 9.8 0.40 - 55.0 -- dB % dBV dB VIN = - 70dBV VIN = - 70dBV,1 Rg = 1k ,2 VIN = - 70dBV OUTPUT: NA PB OUT
11
Video ICs
Parameter Symbol Min. Typ. Max. Unit Conditions
BH7775K
[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 Lch Rch Lch Rch Lch Rch Lch Rch Lch Rch Lch Carrier 2nd harmonic Rch Lch Carrier 3rd harmonic Rch fNOL fNOR fPOL fPOR 1.2950 1.6950 1.3945 1.7935 45.5 45.0 116 116 320 325 -- -- -- -- - 12.0 1.3000 1.7000 1.4000 1.7990 51.5 51.0 138 138 365 370 - 53.0 - 48.0 - 52.0 - 55.0 - 10.2 1.3050 1.7050 1.4055 1.8045 57.5 57.0 160 160 420 425 - 40.0 - 40.0 - 40.0 - 42.0 - 8.4 MHz MHz MHz MHz kHz kHz kHz kHz mVP-P mVP-P dB dB dB dB dB Input condition 1 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
DEVL
DEVR DEVMax.L DEVMax.R
Input condition 4 (f = 10kHz) FM OUT SW: FM L mode FM OUT SW: FM R mode 2nd stage harmonics and fundamental harmonics spectral ratio Lch: FM L mode, Rch: FM R mode 3rd stage harmonics and fundamental harmonics spectral ratio Lch: FM L mode, Rch: FM R mode 1.3MHz / 1.7MHz spectrum ratio.
VOFML VOFMR
f2L f2R f3L f3R fLR
FM MIX ratio (FM MIX1 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 Lch Rch Lch Rch Lch Demedulation distortion Demedulation SW noise level Demedulation noise level Rch Lch Rch Lch Rch VODL VODR VODL2 VODR2 THDDL THDDR VODSWL VODSWR VONDL VONDR - 11.5 - 11.5 VODL - 10.0 VODR - 10.0 -- -- -- -- -- -- - 9.3 - 9.3 VODL - 7.5 VODR - 7.5 0.12 0.13 -- -- - 95.0 - 95.0 - 7.1 - 7.1 VODL - 5.0 VODR - 5.0 0.35 0.35 -- -- - 85.0 - 85.0 dBV dBV dBV dBV % % dBV dBV dBV dBV DEVL = 50.0kHz, f = 1kHz DEVR = 50.0kHz, f = 1kHz DEVL = 50.0kHz, f = 10kHz DEVR = 50.0kHz, f = 10kHz DEVL = 50.0kHz, f = 1kHz,1 DEVR = 50.0kHz, f = 1kHz,1 f = 10kHz, AUDIO H. SW. P = - Hz 5VP-P rectangular-waveform input. After 10kHz TRAP passes DEV. = 25.0kHz2
2
Unmodulated
[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 Rch VRPL VRPR - 1.2 - 1.2 0.0 0.0 + 1.2 + 1.2 dB 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 Symbol VBPFN VBPFP Min. Typ. Max. Unit Conditions
BH7775K
[FM BPF] (INPUT: FMPB IN, OUTPUT: BPF MONITOR L / R) VCC stable, after automatic adjustment BPF L / R level difference NTSC BPF L / R level difference PAL NTSC Lch 1.30MHz insertion loss 1.15MHz attenuation 1.45MHz attenuation 1.70MHz attenuation NTSC Rch 1.70MHz insertion loss 1.55MHz attenuation 1.85MHz attenuation 1.30MHz attenuation PAL Lch 1.40MHz insertion loss 1.25MHz attenuation 1.55MHz attenuation 1.80MHz attenuation PAL Rch 1.80MHz insertion loss 1.65MHz attenuation 1.95MHz attenuation 1.40MHz attenuation ATTPRC ATTPR 1.65 ATTPR 1.95 ATTPR 1.40 - 14.8 -- -- -- - 11.6 ATTPRC - 4.6 ATTPRC - 5.3 -- - 8.6 -- -- ATTPRC - 30.0 dB dB dB dB 1.40MHz + 1.80MHz 1.65MHz + 1.40MHz 1.95MHz + 1.40MHz 1.40MHz + 1.80MHz ATTPLC ATTPL 1.25 ATTPL 1.55 ATTPL 1.80 - 1.28 -- -- -- - 9.7 ATTPLC - 5.0 ATTPLC - 5.2 -- - 6.7 -- -- ATTPLC - 30.0 dB dB dB dB 1.40MHz + 1.80MHz 1.25MHz + 1.80MHz 1.55MHz + 1.80MHz 1.40MHz + 1.80MHz ATTNRC ATTNR 1.55 ATTNR 1.85 ATTNR 1.30 - 15.5 - 12.3 - 9.3 dB dB dB dB 1.30MHz + 1.70MHz 1.55MHz + 1.30MHz 1.85MHz + 1.30MHz 1.30MHz + 1.70MHz ATTNLC ATTNL 1.15 ATTNL 1.45 ATTNL 1.70 - 14.2 ATTNLC - 9.5 ATTNLC - 8.6 -- - 11.1 ATTNLC - 5.0 ATTNLC - 5.0 -- - 8.1 ATTNLC - 2.0 ATTNLC - 2.0 ATTNLC - 30.0 dB dB dB dB 1.30MHz + 1.70MHz 1.15MHz + 1.70MHz 1.45MHz + 1.70MHz 1.30MHz + 1.70MHz - 5.0 - 5.0 0.0 0.0 5.0 5.0 dB dB f = 1.505MHz, VIN = 200mVP-P f = 1.605MHz, VIN = 200mVP-P
LcH, RcH mix input signal 660mVP-P (RATIO 1: 1), FM ALC ON
ATTNRC ATTNRC ATTNRC - 8.3 - 4.7 - 1.9 ATTNRC ATTNRC ATTNRC - 10.6 - 5.4 - 1.6 -- -- ATTNRC - 30.0
13
Video ICs
Parameter [DO detect circuit] DO detector level VDDO 77.0 83.0 89.0 dB Symbol Min. Typ. Max. Unit Conditions
BH7775K
Input level to give DO due to attenuation.
[FNORM to Hi-Fi return delay circuit] FNDLY 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.
Return delay time
110
125
140
ms
[Envelope output circuit] (INPUT: FM PB IN, OUTPUT: ENVE OUT) 0dB = 660mVP-P, 1.3MHz & 1.7MHz MIX IN Envelope output level SP0 Envelope output level SP1 Envelope output level SP2 Envelope output level EP1 Hi-Fi DET output DC FNORMAL Hi-Fi DET output DC HiFi [Hold pulse circuit] Audio head switch pulse threshold voltage Hold pulse width CLOCK IN L mode holding voltage H mode holding voltage DATA IN L mode holding voltage H mode holding voltage MUTE CTRL MUTE holding voltage DC MUTE holding voltage VH22L VH22H 0.0 3.9 -- -- 1.0 VCC V V VH7L VH7H 0.0 2.5 -- -- 0.5 VCC V V VH8L VH8H 0.0 2.5 -- -- 0.5 VCC V V VTHHOLD HOLD 1.66 6.47 2.66 7.77 3.66 9.07 V Hysteresis (0.5V) VENVSP0 VENVSP1 VENVSP2 VENVEP1 VHDETL VHDETH -- 2.22 3.70 2.18 -- 3.50 0 2.72 3.95 2.68 0 4.00 100 3.22 4.20 3.18 100 -- mV V V V mV V No signal, SP MODE VIN = 0dB, SP MODE VIN = + 10dB, SP MODE VIN = - 4dB, EP MODE No signal VIN = 0dB
s
[Voltage for preserving the control system mode]
14
22 330 NAME AOIN NAME COUI 1k 100
500
22k
0.01 330k 12k 1M 33 3.3 10 36 33 ALC 32 PNR 31 30 47k MODEM LINE AMP LINE AMP Hi-Fi DET OUTPUT SWITCH 27 10k 26 25 25.3k FM BPF 24 23 22 MODEM ENVE LOPE 21 20 19 47k PNR 18 17 33 50 MUTE CTRL FM PB IN D.O. COM. A 0.022 28 29 0.01 FM REC OUT 27k 35 34 33 38 37 40 39 VEE 4.7 0.01 0.022 VEE
Video ICs
*Measurement circuit
A 48 EQ 49 50 51 AMP MIX AMP SW ATT 47 52 53 54 RECAMP REC EQ EQ PB 47 46 45 44 43 42 41
V 500 0.2k
V 0.1
0.01
1200p 2.2M
VEE
22k
MIX OUT
LINE OUT R 1500p 1500p
LINE OUT L
22k
10k AUDIO HEAD SWITCH PULSE IN
VCC REC
22k 55 100 56 57 58
V
A
Fig.1
59 100 60 DATA DECODER 61 62 63 64 4.7 1 2 3 4 5 6 7 8 9 10 11 12 13 10 3.3 VEE 4.7
1k DATA FSCIN CLOCK
UNREG VCC UNREG VEE
4.7k
A
4.7k
VEE
LINE1 R IN
VEE
V
4.7k
LINE1 L IN
1k
4.7k 27k
LINE2 R IN INPUT SWITCH
1k
4.7k
LINE2 L IN
1k
4.7k
1k
14
15
16
BS R IN
4.7k
BS L IN
1k
4.7k
TUNER R IN
1k Hi-FiINL 47k V
0.01 0.022
4.7k
TUNER L IN
1k
4.7k
TUNER M IN
1k
BH7775K
4.7k
15
1k
ENVEOUT/ADJFLAG Hi-FiDET
*Application example
16
22 VEE 0.01 100 0.1 33 10 41 33 ALC 32 PNR 31 47k 27k 51 AMP SW ATT MODEM LINE AMP LINE AMP Hi-Fi DET 26 25 D.O. COM. FM BPF 24 25.3k 23 22 MODEM DATA DECODER ENVE LOPE 21 20 19
47k PNR MIX AMP
Video ICs
BA7755
BIAS OSC EQ 49 50 30 29 28 27
RECAMP REC EQ EQ
0.01 PB
1200p
8765
1234
330 1M 3.3 VEE 4.7 0.01 0.022 330k 12k 48 47 46 45 44 8.2k 43 42 40 39 38 37 36 35 34 33
2.2M
VEE 52 53 54 55 56 57 58 59 60 61 62 63 64 4.7 1 2 3 4 5 6 7 8 9 10 11 12 13
10 3.3
P/R CTRL
MIX OUT OUTPUT SWITCH
47
LINE R OUT
1500p
FM REC OUT AUDIO HEAD SWITCH PULSE IN
LINE L OUT
1500p
VCC REC
100 0.022
UNREG VCC
Fig.2
INPUT SWITCH 14 15 16 VEE 4.7 0.01 0.022
4.7k 22k
UNREG VEE
4.7k
VEE
MUTE CTRL FM PB IN
100
LINE1 R IN
4.7k
LINE1 L IN
4.7k 27k
LINE2 R IN
4.7k
LINE2 L IN
18 17
33
4.7k
4.7k
BS R IN
4.7k
BS L IN
TUNER R IN
TUNER L IN
FSCIN ENVELOPE/Hi-Fi DET OUT/ADJ FLAG CLOCK DATA
BH7775K
TUNER M IN
Video ICs
BH7775K
*Electrical characteristic curve
-5 - 10 - 15 GAIN: GV (dB) - 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) Lchannel Rchannel
Fig. 3 FM BPF frequency characteristics (NTSC)
*External dimensions (Units: mm)
16.4 0.3 14.0 0.2 48 33 49 16.4 0.3 14.0 0.2 32
64 1
2.7 0.1
17 16
0.15 0.1
0.05
0.8
0.35 0.1 0.15
QFP-A64
0.5
17

▲Up To Search▲

Price & Availability of BH7775K

	To Download BH7775K Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .