參數(shù)資料
型號: MC44BS373CAFC
廠商: Freescale Semiconductor
文件頁數(shù): 5/52頁
文件大?。?/td> 0K
描述: IC MODULATOR AUD/VID U/V 20-QFN
標準包裝: 490
類型: NTSC/PAL 調(diào)制器
應用: 音頻/視頻,VCR,機頂盒
安裝類型: 表面貼裝
封裝/外殼: 20-VQFN 裸露焊盤
供應商設備封裝: 20-QFN 裸露焊盤(5x5)
包裝: 托盤
MC44BS373CA Data Sheet
Modulator High-Frequency Characteristics
11 Modulator High-Frequency Characteristics
Each of the characteristics listed in Table 20 is classified as one of the following types:
A—100% tested
B—100% correlation tested
C—Characterized on samples
D—Design parameter
Unless otherwise stated, VCC = 5.0V, ambient temperature = 25°C, and video input is 1 Vp-p, with 10-step
grey scale and RF output into 75-
load.
NOTE
Specifications only valid for envelope demodulation.
Table 20. High-Frequency Characteristics
Parameter
Test Conditions
Min
Typ
Max
Unit
Type Notes
TVOUT output level
Output signal from modulator section
79
82
85
dB
VB
1, 2
UHF oscillator frequency
460
880
MHz
A
VHF range
From UHF oscillator internally divided
45
460
MHz
B
TVOUT output attenuation
During transient output inhibit, or when
ATT bit is set to 1
65
75
dBc
B
1, 2
Sound subcarrier harmonics
(Fp
+ n × Fs)
Reference picture carrier
50
63
dBc
C
1
Second harmonic of chroma
subcarrier
Using red EBU bar
45
70
dBc
C
1
Chroma/sound intermodulation:
Fp
+ (Fsnd – Fchr)
Using red EBU bar
65
82
dBc
C
1
Fo (picture carrier) harmonics
2nd harmonic: CH21
38
50
dB
VC
1,3
3rd harmonic: CH21
58
70
Other channels
2
Out-of-band (picture carrier)
spurious
1/2
× Fo – 1/4 × Fo – 3/2 × Fo – 3/4 ×
Fo
From 40 MHz to 1 GHz.
——
10
dB
VC
1
In-band spurious (Fo at 5 MHz)
No video sound modulation.
65
75
dBc
C
1
Notes:
2. See Figure 3.
3. Picture carrier harmonics are highly dependent on PCB layout and decoupling capacitors.
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