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TEMIC Semiconductors
TEMIC Semiconductors

U2795B Datasheet Preview

U2795B Datasheet

2.5-GHz Double Balanced Mixer

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U2795B pdf
TELEFUNKEN Semiconductors
U2795B
2.5-GHz Double Balanced Mixer
Description
U2795B is a 2.5-GHz mixer for WLAN and RF telecom-
munications equipment, e.g., DECT and PCN, built with
TELEFUNKEN’s advanced bipolar technology. A
double balanced approach was chosen to assure good
isolation characteristics and a minimum of spurious
products. The input and output are single ended, and their
characteristics are programmable. No output transformer
or balun is required.
Features
D Supply voltage range: 2.7 to 5.5 V
D Single-ended output, no balun required
D Single-ended input for RF and LO
D Exellent isolation characteristics
D Power down mode
D IP3 and compression point programmable
D 2.5-GHz operating frequency
D SO-8 package
Benefits
D Reduced system costs due to few external component
(no balun) requirements
D Standard independent product
D 3-V operation reduces the battery count and saves
space
Block Diagram
2
RFi
3
P
R1
VH
VS
R2
VR
VH Voltage
regulator
IFo
5
So
4
PD
8
LOi 7
GND 6 VS 1
93 7811 e
Rev. A2: 08.06.1995
1 (13)




TEMIC Semiconductors
TEMIC Semiconductors

U2795B Datasheet Preview

U2795B Datasheet

2.5-GHz Double Balanced Mixer

No Preview Available !

U2795B pdf
U2795B
Pin Description
VS 1
RFI 2
P3
SO 4
8 PD
7 LOi
6 GND
5 IFO
94 7890 e
TELEFUNKEN Semiconductors
Pin Symbol
Function
1 VS Supply voltage
2 RFi RF input
3 P Progamming port IP3, CP
4 SO Output symmetry
5 IFO IF output
6 GND Ground
7 LOi LO input
8 PD Power down
Functional Description
Supply Voltage
The IC is designed for a supply voltage of 2.7 to 5.5 V. As
the IC is internally stabilized, the performance of the
circuit is nearly independent of the supply voltage.
Input Impedance
WInput impedance, ZRFi, is about 700 with an additional
capacitive component. This condition provides the best
noise figure in combination with a matching network.
3. Order Intercept Point (IP3)
Voltage divider, RP / R1, determinates both the input and
output intercept point, IIP3 and OIP3. If RP is infinity the
IIP3 has the maximum of about – 4 dBm.
Current Consumption, IS
Depending on the chosen input and output conditions of
the IC, the current consumption, IS, is between 4 mA and
10 mA. The current consumption in dependence of Rp is
shown in figure 4.
Power Down
This feature provides an extension of battery life. If this
function is not used, Pin 8 has to be connected to VS
(Pin 1).
Output Symmetry
The symmetry of the load current can be matched and so
be optimized for a given load impedance.
The IP3/RP characteristics are shown in figure 1 and 2.
Output Impedance and Intercept Point
Output impedance is shown in figure 9.
Both low output impedance and a high intercept point are
with reference to a high value of RP.
2 (13)
Rev. A2: 08.06.1995




TEMIC Semiconductors
TEMIC Semiconductors

U2795B Datasheet Preview

U2795B Datasheet

2.5-GHz Double Balanced Mixer

No Preview Available !

U2795B pdf
TELEFUNKEN Semiconductors
Absolute Maximum Ratings
Parameters
Supply voltage
Pin 1
Input voltage
Pins 2, 3, 7 and 8
Junction temperature
Storage temperature range
Thermal Resistance
Junction ambient
Parameters
SO 8
Operating Range
Parameters
Supply voltage range
Pin 1
Ambient temperature range
Symbol
VS
VI
Tj
Tstg
Symbol
Rthja
Symbol
VS
Tamb
U2795B
Value
6
0 to VS
125
– 40 to + 125
Unit
V
V
°C
°C
Value
175
Unit
K/W
Value
2.7 to 5.5
– 40 to + 85
Unit
V
°C
Rev. A2: 08.06.1995
3 (13)




Part Number U2795B
Description 2.5-GHz Double Balanced Mixer
Maker TEMIC Semiconductors
Total Page 13 Pages
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