BH7775K 데이터 시트보기 (PDF) - ROHM Semiconductor

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BH7775K

VCR audio signal processing system

ROHM Semiconductor 

Video ICs

BH7775K

Parameter

Symbol Min. Typ. Max. Unit

Conditions

[NORMAL PB AMP] (INPUT: NA HEAD IN, OUTPUT: LINE OUT)

Output voltage level

Distortion

Output residual noise

Open loop gain

(PB PRE AMP)

VOPSN

THDPBN

VONPBN

– 13.4

—

—

– 11.6

0.19

– 63.6

– 9.8

0.40

– 55.0

GVPBNOR

58.0

66.7

—

dB

VIN = – 70dBV

%

VIN = – 70dBV,∗1

dBV Rg = 1k Ω,∗2

dB

VIN = – 70dBV

OUTPUT: NA PB OUT

[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.

PB EQ SW impedance

REQ PB

—

25

50

Ω

SP MODE

HEAD EQ SW impedance REQ HEAD

—

29

50

Ω

EP MODE

[RHS CONTROL]

RHS control current

IIN RHS

98

118

140

µA

RHS control leakage current IL RHS

—

—

1

µA

[PNR ENCODE MODE]

Encode output level

VOENC – 17.0 – 15.7 – 14.4 dBV Input condition 1

Compression characteristic

Encode distortion

Output residual noise

CMP – 26.4

THDEND

—

VONEC

—

– 24.7

0.17

– 56.5

– 23.0

0.37

– 51.5

dB

TU input VIN = – 20dBV→ – 70dBV

output level difference.

%

Input condition 1,∗1

dBV Connect the pertinent input to GND,∗2

[PNR DECODE MODE]

Output voltage level

VODEC – 11.2 – 9.4 – 7.6

dBV 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

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