TC90A80N/F
2002-12-04
15
Chrominance signal input/output characteristics
(Ta = 25°C, VDD = 5.00 V, clock input: 3.579545 MHz, 0.5 Vp-p, I
2C bus: according to test conditions)
Test Conditions (Remarks)
Characteristics
Symbol
Min
Typ.
Max
Unit
I2C bus setup
DATA1 DATA2 DATA3 DATA4
I
2C bus setup
8 0
0 0
Recommended input level
VCIN
―
1.0
1.3
V
Input signal : Apply chroma 100% signal to pin 4.
(To pin 4, chrominance signal only;
to pin 9, composite video signal)
I2C bus setup
0 0
I2C bus setup
8 0
0 0
Chrominance signal gain
GC
4.5
5.2
5.8
dB
Input signal : Apply chroma 100%, 0.714-Vp-p
signal to pins 4 and 9. (To pin 4,
chrominance signal only; to pin 9,
composite video signal)
Test content : Compare pin 27 output level with
input level.
I
2C bus setup
0 0
Comb characteristic
Ccom
35
40
―
dB
Input signal : Apply 0.714-Vp-p, 2.5-V DC offset
sine wave to pin 9.
Test content : Monitor pin 27. Change input
frequency. Measure gain difference
between 3.57168 MHz and
3.579545 MHz.
I
2C bus setup
8 0
0 0
BPF frequency characteristic
BWC
0.5
0.2
0
dB
Input signal : Apply 0.714-Vp-p sine wave to pin 4.
Test content : Monitor pin 27. Change input
frequency. Measure gain difference
between 3.579545 MHz and
3.079545 MHz.
I
2C bus setup
0 0
Differential gain
DG
0
2
5
%
Differential phase
DP
0
2
5
°
Input signal : Apply 1-Vp-p, 5-step staircase (0 =
40 IRE) to pin 9.
Test content : Monitor pin 27 using vector scope
(p-p value).
I
2C bus setup
8 0
0 0
Output impedance
Zc
250
400
700
Input signal : Apply 1-Vp-p chroma 100% signal to
pin 4.
Test content : Calculate output impedance, AC
applied with/without 300- resistor
connected between pin 27 and
GND.
I2C bus setup
0 0
Fundamental wave clock
leakage
L1fc
―
0.3
1.0
mVrms Input signal : No input to pin 9.
Test content : Measure fsc (3.579545 MHz)
component of pin 27.
I
2C bus setup
0 0
Clock leakage 1
L4fc
―
4
―
mVrms Input signal : No input to pin 9.
Test content : Measure 4fsc (14.31818 MHz)
component of pin 27.
I
2C bus setup
0 0
Clock leakage 2
L8fc
―
20
―
mVrms Input signal : No input to pin 9.
Test content : Measure 8fsc (28.63636 MHz)
component of pin 27.