MC44BC375UD 데이터 시트보기 (PDF) - Freescale Semiconductor

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MC44BC375UD

PLL Tuned VHF (Channel 3 / 4) Audio / Video Modulator

Freescale Semiconductor 

PERFORMANCE CHARACTERISTICS

Unless otherwise stated, all performance characteristics

are for:

• Power Supply, VCC = 5.0 V

• Ambient Temperature, TA = 25oC

• Video Input 1.0 Vp-p, 10-step grayscale.

• RF inputs/outputs into 75 Ω load.

NOTE:

Specifications only valid for envelope demodulation.

The parameters listed are based on the type of test condi-

tions found in the column Type.

• A = 100% tested

• B = 100% Correlation tested

• C = Characterized on samples

• D = Design parameter

See the “Characterization Measurement Conditions” on

page 8 for each C type parameter.

Table 6. High Frequency Characteristics

Parameter

Test Conditions(1)

Device

Min Typ Max

RFOUT output level

Output signal from modulator MC44BC375U 74

76

79

section

MC44BC375UA 78

80

83

Sound subcarrier harmonics (Fp+n∗Fs) Reference picture carrier

MC44BC375U —

.73

-65

MC44BC375UA —

-72

.65

Second harmonic of chroma subcarrier Using red EBU bar

MC44BC375U —

-65

-55

MC44BC375UA —

—

-60

Chroma/Sound intermodulation:

Fp+ (Fsnd - Fchr)

Fo (picture carrier) harmonics(2)

Using red EBU bar

2nd harmonic

MC44BC375U —

-65

-60

MC44BC375UA —

—

-60

MC44BC375U —

30

42

MC44BC375UA —

—

46

Out band (picture carrier) spurious

3rd harmonic:

1/2∗Fo - 1/4∗Fo -

3/2∗Fo - 3/4∗Fo

MC44BC375U —

66

69

MC44BC375UA —

—

73

MC44BC375U —

—

27

MC44BC375UA —

—

32

In band spurious (Fo @ 5.0 MHz)

No video sound modulation MC44BC375U —

-70

-62

MC44BC375UA —

—

-60

4.0 MHz Crystal spurious (Fo ± 4.0 MHz) No video sound modulation MC44BC375U —

-82

-75

MC44BC375UA —

—

-75

1. See Performance Measurement Test Set-ups, Table 9.

2. Picture carrier harmonics are highly dependant on PCB layout and decoupling capacitors.

Unit

dBµV

dBc

dBc

dBc

dBµV

dBµV

dBµV

dBc

dBc

Type

B

C

C

C

C

C

C

C

C

Table 7. Video Performance Characteristics

Parameter

Test Conditions(1)

Min

Typ

Max

Unit

Video bandwidth

Reference 0 dB at 100 KHz, measured at 5.0 MHz -1.5

-0.5

—

dB

Video input level

75 Ω load

—

—

1.5

Vcvbs

Video input current

—

0.2

1.0

µA

Video input impedance

—

500

—

KΩ

Video S/N

Weighted

56

60

—

dB

Unweighted

49

52

—

—

Differential Phase

On line 17 in M standard (FCC)

—

±1.0

—

deg

Differential Gain

On line 17 in M standard (FCC)

—

1.0

5.0

%

Luma/Sync ratio

Input ratio 7.0:3.0

6.8/3.2 — 7.2/2.8 —

Video modulation depth

Peak White Clip

Video input level = 1.0 VCVBS

Video Modulation depth for video = 1.4 VCVBS

80

85

90

%

90.5

95

99.5

%

1. See Performance Measurement Test Set-ups, Table 9.

Type

C

D

A

A

C

C

C

C

B

B

B

MC44BC375U

6

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Freescale Semiconductor

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