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參數(shù)資料
| 型號： | TDA8725T |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 消費家電 |
| 英文描述： | Antenna signal processor |
| 中文描述： | SPECIALTY CONSUMER CIRCUIT, PDSO16 |
| 封裝： | PLASTIC, SO-16 |
| 文件頁數(shù)： | 2/10頁 |
| 文件大?。?/td> | 102K |
| 代理商： | TDA8725T |
1995 Mar 21
2
Philips Semiconductors
Product specification
Antenna signal processor
TDA8725T
FEATURES
75
antenna input stage
75
VCR RF input stage
75
VCR tuner output
75
TV tuner output.
GENERAL DESCRIPTION
The TDA8725T has been designed to split and combine
RF signals for Picture-In-Picture (PIP) and VCR
applications.
For PIP applications, the antenna input signal is split and
fed to the main TV tuner and the PIP tuner. Good signal
suppression between the two outputs enables good quality
of the main picture when the PIP tuner is in use.
For VCR applications, the antenna input signal is split and
then fed directly to the VCR tuner and the TV tuner after
being combined with the VCR - RF signal. Good signal
suppression between the two outputs enables good quality
pictures when the TV and VCR tuners are both operating.
Good signal suppression between the VCR input and the
antenna input reduces the amount of unwanted signal on
the antenna.
QUICK REFERENCE DATA
SYMBOL
PARAMETER
CONDITIONS
MIN.
TYP.
MAX.
UNIT
V
P
I
P
f
i
G
p
supply voltage (pins 8 and 9)
supply current (pins 8 and 9)
input frequency
power gain
from antenna to VCR
from antenna to TV
from VCR
noise figure
antenna linearity 2nd order
intercept point
4.75
40
5.0
65
5.25
860
V
mA
MHz
3.5
4
6.5
137
119
121
108
5.0
5.5
0
9.0
140
124
124
111
6.5
7
10
dB
dB
dB
dB
dB
μ
V
dB
μ
V
dB
μ
V
dB
μ
V
F
IP2
at 40 MHz
at 860 MHz
at 40 MHz
at 860 MHz
IP3
antenna linearity 3rd order
intercept point
s
sup
signal suppression
VCR input to antenna
0 to 1 GHz
1 to 3 GHz
0 to 300 MHz
300 to 860 MHz
0 to 300 MHz
300 to 860 MHz
32
25
35
22
35
22
37
30
40
27
40
27
dB
dB
dB
dB
dB
dB
VCR output to TV output
TV output to VCR output
VSWR
voltage standing wave ratio
at the antenna input
at the outputs
maximum input power on antenna
for 1 dB gain compression
2.5
1.5
10
4
3
P
i(max)
dBm
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