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U4459B PDF 데이터시트 : 부품 기능 및 핀배열

부품번호 U4459B
기능 IF Amplifier
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U4459B 데이터시트, 핀배열, 회로
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IF Amplifier for Cable DVB Processing
U4459B
Description
The U4459B is an integrated bipolar circuit suitable for
the IF processing in cable-DVB receiver (DVB = Digital
Video Broadcasting) and cable network application.
The circuit contains a wideband IF amplifier, mixer stage,
gain control for the IF amplifier and a tuner-AGC
(Automatic Gain Control) with adjustable take over point
for an additional external preamplifier (tuner).
Features
D Input frequency range 30 to 50 MHz (1st IF)
D Wideband IF amplifier with high linearity
D Gain control of the IF amplifier by external
dc voltage
D Mixer stage with local oscillator input
(symmetrical or unsymmetrical)
D High output level of mixed signal (2nd IF)
(up to 2.4 V, peak-to-peak value)
D Tuner-AGC with adjustable take over point for a
preamplifier
D Supply voltage range 6.8 to 13.5 V
Package: DIP16
IF1 in
IF1 in
1
16
IF amp
LO in LO in
89
Mixer
IF gain
control
95 9636
6
IF2 out
3
ITun
TELEFUNKEN Semiconductors
Rev. A1, 15-Jul-96
Bandgap
14
VS
2 5 13
4,15
VTun VGain
BG GND
Figure 1. Block diagram
1 (7)




U4459B pdf, 반도체, 판매, 대치품
U4459B
22 m H
+VS
IF1
input
1:2
10 m F
10 nF
4.7 m F
10 nF
16 15 14 13 12 11 10 9
10 nF
200 W
U4459B
200 W
2:1
10 nF
LO
input
95 9637
12345678
10 kW
*)
10 nF
Tuner AGC
take over
Tuner AGC IF gain IF2 out
control
Figure 3. Test circuit
*) depends on application
1 m F to 10 m F
95 9637
SAW filter
IF1
in
22 m H
+VS
10 m F
10 nF
10 nF
16 15 14 13 12 11 10
9
2:1
U4459B
200 W
10 nF
LO
input
95 9638
12345678
10 kW
*)
Tuner AGC
take over
Tuner AGC IF gain
control
IF2 out
Figure 4. Basic application circuit
10 nF
*) depends on application
1 m F to 10 m F
4 (7) TELEFUNKEN Semiconductors
Rev. A1, 15-Jul-96

4페이지










U4459B 전자부품, 판매, 대치품
U4459B
Ozone Depleting Substances Policy Statement
It is the policy of TEMIC TELEFUNKEN microelectronic GmbH to
1. Meet all present and future national and international statutory requirements.
2. Regularly and continuously improve the performance of our products, processes, distribution and operating systems
with respect to their impact on the health and safety of our employees and the public, as well as their impact on
the environment.
It is particular concern to control or eliminate releases of those substances into the atmosphere which are known as
ozone depleting substances ( ODSs).
The Montreal Protocol ( 1987) and its London Amendments ( 1990) intend to severely restrict the use of ODSs and
forbid their use within the next ten years. Various national and international initiatives are pressing for an earlier ban
on these substances.
TEMIC TELEFUNKEN microelectronic GmbH semiconductor division has been able to use its policy of
continuous improvements to eliminate the use of ODSs listed in the following documents.
1. Annex A, B and list of transitional substances of the Montreal Protocol and the London Amendments respectively
2 . Class I and II ozone depleting substances in the Clean Air Act Amendments of 1990 by the Environmental
Protection Agency ( EPA) in the USA
3. Council Decision 88/540/EEC and 91/690/EEC Annex A, B and C ( transitional substances ) respectively.
TEMIC can certify that our semiconductors are not manufactured with ozone depleting substances and do not contain
such substances.
We reserve the right to make changes to improve technical design and may do so without further notice.
Parameters can vary in different applications. All operating parameters must be validated for each customer
application by the customer. Should the buyer use TEMIC products for any unintended or unauthorized
application, the buyer shall indemnify TEMIC against all claims, costs, damages, and expenses, arising out of,
directly or indirectly, any claim of personal damage, injury or death associated with such unintended or
unauthorized use.
TEMIC TELEFUNKEN microelectronic GmbH, P.O.B. 3535, D-74025 Heilbronn, Germany
Telephone: 49 ( 0 ) 7131 67 2831, Fax number: 49 ( 0 ) 7131 67 2423
TELEFUNKEN Semiconductors
Rev. A1, 15-Jul-96
7 (7)

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부품번호상세설명 및 기능제조사
U4459B

IF Amplifier

TEMIC Semiconductors
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