MC44BC375U Datasheet, PDF (6/16 Pages) Freescale Semiconductor, Inc – PLL Tuned VHF (Channel 3 / 4)Audio / Video Modulator

PERFORMANCE CHARACTERISTICS
Unless otherwise stated, all performance characteristics
are for:
• Power Supply, V_CC = 5.0 V
• Ambient Temperature, T_A = 25^oC
• Video Input 1.0 V_p-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
RF_OUT 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 V_CVBS
Video Modulation depth for video = 1.4 V_CVBS
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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