BH7800K Ver la hoja de datos (PDF) - ROHM Semiconductor
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BH7800K Datasheet PDF : 13 Pages
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Video ICs
BH7800K
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)
NTSC carrier frequency
Lch
Rch
fNOL
fNOR
1.2925
1.6940
1.2975
1.6990
1.3025
1.7040
MHz
MHz
No input, after automatic adjustment
PAL carrier frequency
Lch
fPOL
Rch
fPOR
1.3930
1.7945
1.3980
1.7995
1.4030
1.8045
MHz
MHz
No input, after automatic adjustment
Frequency deviation
Lch
DEVL
Rch
DEVR
44.0
50.0
56.0
± kHz
INPUT condition 1
44.0
50.0
56.0
± kHz
Lch DEVMax.L
118
140
162
± kHz
Maximum frequency deviation
INPUT condition 3 (f = 10kHz)
Rch DEVMax.R
118
140
162
± kHz
FM output level
Carrier 2nd harmonic
Carrier 3rd harmonic
Lch
Rch
Lch
Rch
Lch
Rch
VOFML
VOFMR
f2L
f2R
f3L
f3R
310
355
410
320
365
420
—
– 53.0 – 40.0
—
– 48.0 – 40.0
—
– 52.0 – 40.0
—
– 55.0 – 42.0
mVP-P
mVP-P
dB
dB
dB
dB
FM OUT SW: FM L mode
FM OUT SW: FM R mode
Spectrum ratio of 2nd harmonic with respect to
fundamental
Lch: FM L mode, Rch: FM R mode
Spectrum ratio of 3rd harmonic with respect to
fundamental
Lch: FM L mode, Rch: FM R mode
FM MIX ratio (FM MIX1 mode)
fLR
– 14.3 – 12.5 – 10.7
dB
Spectrum ratio 1.30MHz / 1.70MHz
[MODEM PB MODE] (INPUT: FM PB IN, OUTPUT: LINE OUT L / R)
(After BPF f0 adjustment, VIN = 1320mVP-P, 1.30MHz, 1.70MHz MIX IN)
Lch
Demodulation output level 1
Rch
VODL
VODR
– 12.4
– 12.4
– 10.2
– 10.2
– 8.0
– 8.0
dBV DEVL = ± 50.0kHz, f = 1kHz
dBV DEVR = ± 50.0kHz, f = 1kHz
Lch
Demodulation output level 2
Rch
Lch
Demodulation distortion
Rch
VODL2
VODR2
THDDL
THDDR
VODL
– 10.0
VODR
– 10.0
—
—
VODL
– 7.8
VODR
– 7.8
0.12
0.13
VODL
– 5.6
VODR
– 5.6
0.35
0.35
dBV DEVL = ± 50.0kHz, f = 10kHz
dBV DEVR = ± 50.0kHz, f = 10kHz
%
DEVL = ± 50.0kHz, f = 1kHz,∗1
%
DEVR = ± 50.0kHz, f = 1kHz,∗1
Demodulation noise level
Lch
Rch
VONDL
VONDR
—
– 98.0 – 85.0
—
– 98.0 – 85.0
dBV Unmodulated
dBV ∗2
[Recording→playback overall characteristics] (EE···INPUT: LINE IN L / R, OUTPUT: LINE OUT L / R)
(PB···INPUT: FM PB IN, OUTPUT: LINE OUT L / R)
Lch
Line output recording / playback
level difference
Rch
VRPL
VRPR
– 1.2
– 1.2
0.0
+ 1.2
0.0
+ 1.2
Carrier frequency, after adjusting BPF
dB
EE mode: INPUT condition 1
PB mode: FM PB IN = 1320mVP-P
f = 1.30MHz, 1.70MHz 1: 1 MIX,
The difference between the EE and PB line out
dB
levels when input is DEV = DEVL,R
(the frequency deviation given above)
[FM BPF] (INPUT: FM PB IN, OUTPUT: BPF MONITOR L / R)
BPF L / R level difference NTSC
∆VBPFN
– 5.0
0.0
5.0
dB
After automatic adjustment, NTSC
f = 1.505MHz, VIN = 400mVP-P
BPF L / R level difference PAL
∆VBPFP
– 5.0
0.0
5.0
dB
After automatic adjustment, PAL
f = 1.605MHz, VIN = 400mVP-P
∗ ∗ 1: B.W. = 0.4 to 30kHz
2: DIN AUDIO
8
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