BH7801BK データシートの表示（PDF） - ROHM Semiconductor

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BH7801BK

Single chip Hi-Fi audio signal processor

ROHM Semiconductor 

Video ICs

BH7801BK

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

1.2905 1.2975 1.3045

1.6920 1.6990 1.7060

MHz

No input, after automatic adjustment

MHz

PAL carrier frequency

Lch

fPOL

Rch fPOR

1.3910 1.3980 1.4050

1.7925 1.7995 1.8065

MHz

No input, after automatic adjustment

MHz

Frequency deviation

Lch DEVL

Rch DEVR

43.0 49.0 55.0 ± kHz

INPUT condition 1

44.5 50.5 56.5 ± kHz

Maximum frequency deviation

Lch DEVMax.L 118

140

162 ± kHz

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

300

355

410

310

365

420

— – 53.0 – 40.0

— – 48.0 – 40.0

— – 52.0 – 40.0

— – 55.0 – 40.0

mVP-P FM OUT SW: FM L mode

mVP-P

dB

dB

dB

dB

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 3nd harmonic with

respect to fundamental

Lch: FM L mode, Rch: FM R mode

FM MIX ratio (FM MIX1 mode)

fLR

– 14.5 – 12.5 – 10.5

dB Spectrum ratio 1.30MHz / 1.70MHz

〈MODEM PB MODE〉 (INPUT: M PB IN, OUTPUT: LINE OUT L / R)

Carrier setting resistor, after BPF f0 adjustment, VIN = 660mVP-P, 1.30MHz, 1.70MHz MIX IN

Demodulation output level 1

Lch VODL – 12.7 – 10.2 – 7.7

dBV

Rch VODR – 12.7 – 10.2 – 7.7

dBV

DEVL = ± 50.0kHz, f = 1kHz

DEVR = ± 50.0kHz, f = 1kHz

Demodulation output level L / R difference — ∆VOD

Demodulation output level 2

Lch VODL2

Rch VODR2

Demodulation distortion

Lch THDDL

Rch THDDR

– 1.6

VODL

– 10.0

VODR

– 10.0

—

—

0.0

VODL

– 7.8

VODR

– 7.8

0.12

0.13

+ 1.6

VODL

– 5.6

VODR

– 5.6

0.35

0.35

dB VODL – VODR

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 – 86.0

— – 98.0 – 86.0

dBV Unmodulated

dBV ∗2

Lch VODSWL

— – 20.0 – 19.0

AHSWPIN: 30Hz, 5VP-P

dB FMPBIN: DEV. = ± 40kHz (f = 10kHz)

Demodulation SW noise level

Relative ratio of actual values of fC = 3kHz,

Rch VODSWR

— – 20.0 – 19.0

dB – 48dB / oct. after passing through LPF, and fC

= 20kHz, – 48dB/oct. after passing through LPF.

〈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)

Line output recording / playback

level difference

Lch

VRPL

– 1.2

Rch VRPR

– 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 = 660mVP-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)

∗ ∗ 1: B.W. = 0.4 to 30kHz 2: DIN AUDIO

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