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參數資料
| 型號： | LA7642N |
| 元件分類： | 消費家電 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, PDIP16 |
| 封裝： | 0.300 INCH, DIP-16 |
| 文件頁數： | 2/6頁 |
| 文件大小： | 63K |
| 代理商： | LA7642N |
No. 5693-2/6
LA7642N
Parameter
Symbol
Conditions
Ratings
Unit
min
typ
max
Referenced to 4.286 MHz. For reference only.
EQU = off.
Input a 20 mV p-p, f = 4.286 MHz CW signal
Bell filter frequency characteristics
BEL4.086
to pin 14 and, measure the pin 16 output
–9
–6
–3
dB
4.086 MHz
(f = 4.286 MHz). Next, input a CW of
20 mV p-p, f = 4.086 MHz and measure the
pin 16 output (f = 4.086 MHz) and calculate
the frequency characteristics.
Referenced to 4.286 MHz. For reference only.
EQU = off.
Input a 20 mV p-p, f = 4.286 MHz CW signal
Bell filter frequency characteristics
BEL4.486
to pin 14 and, measure the pin 16 output
–5
–2
–0.5
dB
4.486 MHz
(f = 4.286 MHz). Next, input a CW of
20 mV p-p, f = 4.486 MHz and measure the
pin 16 output (f = 4.486 MHz) and calculate
the frequency characteristics.
Referenced to 4.286 MHz. For reference only.
EQU = on.
Input a 20 mV p-p, f = 4.286 MHz CW signal
EQU frequency characteristics
EQU4.086
to pin 14 and, measure the pin 16 output
–10.5
–7.5
–4.5
dB
4.086 MHz
(f = 4.286 MHz). Next, input a CW of
20 mV p-p, f = 4.086 MHz and measure the
pin 16 output (f = 4.086 MHz) and calculate
the frequency characteristics.
Referenced to 4.286 MHz. For reference only.
EQU = on.
Input a 20 mV p-p, f = 4.286 MHz CW signal
EQU frequency characteristics
EQU4.486
to pin 14 and measure the pin 16 output
–3
0
+3
dB
4.486 MHz
(f = 4.286 MHz). Next, input a CW of
20 mV p-p, f = 4.486 MHz and measure the
pin 16 output (f = 4.486 MHz) and calculate
the frequency characteristics.
Referenced to 4.35 MHz. For reference only.
EQU = off.
Input a 20 mV p-p CW signal to pin 14 and
Bell filter frequency deviation from
BELF0
modify the frequency of that signal. Measure
–50
0
+50
kHz
center frequency
the deviation from 4.35 MHz of the frequency
(the center frequency) for which the pin 16
output is maximized.
Referenced to 4.35 MHz. For reference only.
Bell filter gain difference at f0 ±500 kHz
BELdG
EQU = off.
–1
0
+1
dB
Measure the gain at the BELF0 ±500 kHz,
and calculate the difference.
[Chrominance Block]
Let 0 dB = 200 mV p-p. Input a color bar
signal to pin 14 and gradually lower the input
Killer operating point
KILL
signal level. Measure the input level at the
–42
–36
–33
dB
point the pin 13 DC voltage falls below 1/2*
VCC.
The pin 7 B-Y amplitude for a color bar signal.
B-Y output amplitude
VBY
Let 0 dB = 200 mV p-p. Input a color bar
0.60
0.75
0.90
Vp-p
signal (0 dB) to pin 14, and measure the B-Y
amplitude at pin 7.
The pin 6 R-Y amplitude for a color bar signal.
R-Y output amplitude
VRY
Let 0 dB = 200 mV p-p. Input a color bar
0.74
0.92
1.10
Vp-p
signal (0 dB) to pin 14, and measure the R-Y
amplitude at pin 6.
VRY/VBY. Calculate the ratio of the values
R-Y/B-Y output ratio
RATRB
measured above.
1.1
1.23
1.35
RATRB = VRY/VBY
Input a color bar signal (0 dB) to pin 14. In the
pin 7 (B-Y) output waveform measure the
amplitude of the blue (+230 kHz) and yellow
B-Y linearity
LINBY
(–230 kHz) components (A) and measure the
85
100
115
%
amplitude of the blue green (+78 kHz) and
red (–78 kHz) components (B). Calculate the
value of LINBY from the following formula.
LINBY = (A/B)
× (156/460) × 100 (%)
Continued from preceding page.
Continued on next page.
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