LA7170 datasheet(2/8 Pages) SANYO

No de pièce	LA7170

Description	RF Modulator for UHF Band (Supports SECAM)

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Fabricant	SANYO [Sanyo Semicon Device]

Site Internet	https://www.sanyo-av.com/us/

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2 / 8 page

No. 5675-2/8

LA7170M

Continued from preceding page.

Parameter

Symbol

Conditions

Ratings

Unit

min

typ

max

[Picture]

Picture modulation

mp

VIN = 1 Vp-p, 100% white

73

80

87

%

Maximum picture modulation

mp max

VIN = 1.5 Vp-p, 100% white

88

93

98

%

SYNC compression

∆(S/V)

VIN = 1 Vp-p, 100% white {1–(S/V)(3/7)} × 100

1.5

5

%

Differential gain

DG

VIN : 5-stair step, mp = 80%, at fourth step

2

5

%

Differential phase

DP

VIN : 5-stair step, mp = 80%, at fourth step

–6

0

+6

deg

SECAM picture modulation

mp SCM

VIN = 1 Vp-p, 100% white S10 : a

88

93

98

%

TSG picture modulation

mp TSG

S9 : off

70

80

90

%

TSG SV ratio

V/S

S9 : off

6.3/3.7

6.8/3.2

7.3/2.7

TSG horizontal period

TS

S9 : off

63.7

64.0

64.3

µs

TSG synchronization pulse width

HS

S9 : off

3.6

4.0

4.4

µs

TSG white signal width

HV

S9 : off

3.6

4.0

4.4

µs

TSG first white rising edge

TV1

S9 : off

22

24

26

µs

TSG second white rising edge

TV2

S9 : off

38

40

42

µs

[Sound]

FM sound modulation

Rank A

73

81

89

%

Rank B

ms FM

81

90

99

%

Rank C

90

100

110

%

Rank D

99

110

121

%

Rank E

109

121

133

%

Interchannel FM sound modulation ratio

∆ms FM ms FM ratio with S10: off

0.93

0.98

1.03

FM sound distortion

THD FM

S10: b/off; AIN = 1 Vp-p with 1-kHz sine

0.3

1.0

%

wave input

S10: b/off; VIN = 1 Vp-p color bar; AIN with

FM sound signal-to-noise ratio

S/NFM

1-kHz sine wave input; ratio of level at AIN =

43

55

dB

1 Vp-p to that at AIN = 0 Vp-p

Maximum FM modulation

ms max

Maximum modulation possible with S10:

400

%

b/off and sound distortion ratio within 3%

AM sound modulation

ms AM

S10: a; AIN = 1 Vp-p with 1-kHz sine wave

43

50

57

%

input

AM sound distortion ratio

THD AM

S10: a; AIN = 1 Vp-p with 1-kHz sine wave

0.5

2

%

input

S10: a; VIN = 1 Vp-p color bar; AIN with 1-kHz

AM sound signal-to-noise ratio

S/N AM

sine wave input; ratio of level at AIN = 1 Vp-p

42

47

dB

to that at AIN = 0 Vp-p

AIN = 1.66 Vp-p with 1-kHz sine wave input;

100% modulation: ±50 kHz; S10: b

Note: AIN = 1 Vp-p normally produces 60%

modulation.

Note: The AM sound items refer to direct AM detection from the sound carrier (fp + sound intercarrier). This device requires the special care associated with

all high-frequency devices.

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