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PDF U2794 Data sheet ( Hoja de datos )
| Número de pieza | U2794 | |
| Descripción | 1000 MHz Quadrature Demodulator | |
| Fabricantes | TEMIC Semiconductors | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de U2794 (archivo pdf) en la parte inferior de esta página. Total 11 Páginas | ||
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TELEFUNKEN Semiconductors
1000 MHz Quadrature Demodulator
U2794B
Description
U2794B silicon monolithic integrated circuit is a quadra-
ture demodulator that is manufactured using
TELEFUNKEN’s advanced UHF technology. This
demodulator features a frequency range from
70 – 1000 MHz, low current consumption, selectable
gain, power down mode and is adjustment free. The IC is
suitable for direct conversion and image rejection
applications in digital radio systems up to 1 GHz such as
cellular radio, cordless telephone, cable TV and satellite
TV systems.
Features
D Supply voltage 5 V (typ.)
D Very low power consumption 125 mW (typ.)
D Very good image rejection by means of phase control
loop for precise 90° phase shifting
D Duty cycle regeneration for single ended LO input
signal
D Low LO input level –10 dBm (typ.)
D LO – frequency from 70 MHz to 1 GHz
D Power down mode
D 25 dB gain control
D Very low I/Q output dc offset voltage typ. < 5 mV
Block Diagram
VS PD
5,6 14
Power
down
7
RFin
8
11
GC
90°Control
loop
16,18
GND
IIX II
43
1 IX
OUTPUT
2I
0°
90°
Frequency
doubler
10
QQX
9
QQ
Duty cycle
regenerator
15
17 LO
13 PC
12 PCX
Q
19 OUTPUT
20 QX
95 9778
Ordering Information
Extended Type Number
U2794B-AFS
U2794B-AFSG3
Rev. A3: 23.08.1995
Package
SSO 20
SSO 20
Remarks
Rail, MOQ 830 pcs.
Tape and reel, MOQ 4000 pcs.
1 (11)
1 page  
TELEFUNKEN Semiconductors
Test Circuit
95 9842
U2794B
1n
W* optional for single ended tests (notice 3 dB bandwidth of AD620)
T1, T2 = transmission line ZO = 50 .
If no GC function is required, connect pin 11 to GND.
For high and low gain status GC’ is to be switched to GND respectively to VS.
Figure 1.
Rev. A3: 23.08.1995
5 (11)
5 Page 
TELEFUNKEN Semiconductors
U2794B
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
Rev. A3: 23.08.1995
11 (11)
11 Page | ||
| Páginas | Total 11 Páginas | |
| PDF Descargar | [ Datasheet U2794.PDF ] | |
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