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參數(shù)資料
| 型號： | TDA8349A |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 接收器 |
| 英文描述： | Multistandard IF amplifier and demodulator |
| 中文描述： | AM, VIDEO DISCRIMINATOR, PDIP20 |
| 封裝： | PLASTIC, DIP-20 |
| 文件頁數(shù)： | 6/17頁 |
| 文件大小： | 108K |
| 代理商： | TDA8349A |
February 1991
6
Philips Semiconductors
Product specification
Multistandard IF amplifier and demodulator
TDA8349A
This sample-and-hold circuit is not used in the L mode, but
it will function as a low-pass filter in this mode and
therefore also reduces the video dependency of the AFC.
A gain stage amplifies the voltage swing by 5 times. The
output of the AFC circuit will be an inverse analog output
on pin 8 when pin 9 is connected to a voltage above 8 V. If
pin 9 is connected to a voltage above 10 V the output will
be a normal analog output. Normally pins 8 and 9 together
provide digital AFC information.
Video recognition circuit
For full scart functions it is necessary to implement a
second mute function for non-video signals in the whole
television concept. This is realized in this IF-IC. With an
internal sync separator and an internal integrator it is
possible to achieve a very sensitive identification circuit,
which measures the mean frequency of the input signal.
This is normally approximately 16 kHz. The integrator
capacitor will be loaded during the whole line time and
unloaded during the sync pulse. The maximum voltage at
this internal capacitor is a value for the main frequency of
the video signal. By changing the value of an external
capacitor it is possible to influence the speed and
sensitivity of the recognition circuit. It is possible to gain
sensitivity performance at disturbed signals by increasing
the value of the external capacitor, however this will
reduce the speed of the identification circuit.
Video switch circuit
The video switch also provides application for full SCART
functions. The circuit has two inputs, one output and a
control pin. The switch selects either internal or external
video signals. A
×
2 gain stage for the external input
provides an equal output level for internal or external video
from the SCART. The crosstalk of the unwanted signal is
better than
50 dB and the total signal handling meets all
the requirements for SCART specifications.
LIMITING VALUES
In accordance with the Absolute Maximum System (IEC 134)
SYMBOL
PARAMETER
MIN.
0.5
25
25
MAX.
UNIT
V
14-17
P
tot
T
stg
T
amb
supply voltage (pin 14)
total power dissipation
storage temperature range
operating ambient temperature range
13.2
1.2
V
W
°
C
°
C
+
150
+
75
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| TDA8350 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:DC-coupled vertical deflection and East-West output circuit |
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| TDA8350Q/N6,112 | 功能描述:IC DC COUPLED V-DEFL 13-SIL RoHS:是 類別:集成電路 (IC) >> 專用 IC 系列:* 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:1 系列:- 類型:調(diào)幀器 應(yīng)用:數(shù)據(jù)傳輸 安裝類型:表面貼裝 封裝/外殼:400-BBGA 供應(yīng)商設(shè)備封裝:400-PBGA（27x27） 包裝:散裝 |
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| TDA8351/N6,112 | 功能描述:IC DC COUPLED V-DEFL 9-SIL RoHS:是 類別:集成電路 (IC) >> 專用 IC 系列:* 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:1 系列:- 類型:調(diào)幀器 應(yīng)用:數(shù)據(jù)傳輸 安裝類型:表面貼裝 封裝/外殼:400-BBGA 供應(yīng)商設(shè)備封裝:400-PBGA（27x27） 包裝:散裝 |
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