參數(shù)資料
型號(hào)： MC44BC375UAFCR2
廠商： Freescale Semiconductor
文件頁數(shù)： 13/16頁
文件大?。?/td> 0K
描述： IC MODULATOR AUD/VID VHF 20-QFN
標(biāo)準(zhǔn)包裝： 2,500
類型： 調(diào)制器
應(yīng)用： 機(jī)頂盒
安裝類型： 表面貼裝
封裝/外殼： 20-VFQFN 裸露焊盤
供應(yīng)商設(shè)備封裝： 20-QFN 裸露焊盤（4x4）
包裝： 帶卷 (TR)
Application Specific Products
6
Freescale Semiconductor
MC44BC375U
PERFORMANCE CHARACTERISTICS
Unless otherwise stated, all performance characteristics
are for:
Power Supply, VCC = 5.0 V
Ambient Temperature, TA = 25
o C
Video Input 1.0 Vp-p, 10-step grayscale.
RF inputs/outputs into 75
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
page 8 for each C type parameter.
Table 6. High Frequency Characteristics
Parameter
Test Conditions(1)
1. See Performance Measurement Test Set-ups, Table 9.
Device
Min
Typ
Max
Unit
Type
RFOUT output level
Output signal from modulator
section
MC44BC375U
MC44BC375UA
74
78
76
80
79
83
dB
V
B
Sound subcarrier harmonics (Fp
+nFs)
Reference picture carrier
MC44BC375U
MC44BC375UA
—
.73
-72
-65
.65
dBc
C
Second harmonic of chroma subcarrier
Using red EBU bar
MC44BC375U
MC44BC375UA
—
-65
—
-55
-60
dBc
C
Chroma/Sound intermodulation:
Fp
+ (Fsnd - Fchr)
Using red EBU bar
MC44BC375U
MC44BC375UA
—
-65
—
-60
dBc
C
Fo (picture carrier) harmonics(2)
2. Picture carrier harmonics are highly dependant on PCB layout and decoupling capacitors.
2nd harmonic
MC44BC375U
MC44BC375UA
—
30
—
42
46
dB
V
C
3rd harmonic:
MC44BC375U
MC44BC375UA
—
66
—
69
73
dB
V
C
Out band (picture carrier) spurious
1/2
Fo - 1/4Fo -
3/2
Fo - 3/4Fo
MC44BC375U
MC44BC375UA
—
27
32
dB
V
C
In band spurious (Fo @ 5.0 MHz)
No video sound modulation
MC44BC375U
MC44BC375UA
—
-70
—
-62
-60
dBc
C
4.0 MHz Crystal spurious (Fo ± 4.0 MHz) No video sound modulation
MC44BC375U
MC44BC375UA
—
-82
—
-75
dBc
C
Table 7. Video Performance Characteristics
Parameter
Test Conditions(1)
1. See Performance Measurement Test Set-ups, Table 9.
Min
Typ
Max
Unit
Type
Video bandwidth
Reference 0 dB at 100 KHz, measured at 5.0 MHz
-1.5
-0.5
—
dB
C
Video input level
75
load
—
1.5
Vcvbs
D
Video input current
—
0.2
1.0
A
Video input impedance
—
500
—
K
A
Video S/N
Weighted
56
60
—
dB
C
Unweighted
49
52
—
C
Differential Phase
On line 17 in M standard (FCC)
—
±1.0
—
deg
C
Differential Gain
On line 17 in M standard (FCC)
—
1.0
5.0
%
C
Luma/Sync ratio
Input ratio 7.0:3.0
6.8/3.2
—
7.2/2.8
—
B
Video modulation depth
Video input level = 1.0 VCVBS
80
85
90
%
B
Peak White Clip
Video Modulation depth for video = 1.4 VCVBS
90.5
95
99.5
%
B
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