TEMIC U2795B-FP

U2795B
TELEFUNKEN Semiconductors
2.5-GHz Double Balanced Mixer
Description
U2795B is a 2.5-GHz mixer for WLAN and RF telecommunications 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
Benefits
D Supply voltage range: 2.7 to 5.5 V
D Reduced system costs due to few external component
D Single-ended output, no balun required
D Standard independent product
D 3-V operation reduces the battery count and saves
(no balun) requirements
D Single-ended input for RF and LO
space
D Exellent isolation characteristics
D Power down mode
D IP3 and compression point programmable
D 2.5-GHz operating frequency
D SO-8 package
Block Diagram
VS
2
RFi
R2
3
P
So
4
VR
R1
VH
VH
LO i 7
Rev. A2: 08.06.1995
IFo
5
GND 6
Voltage
regulator
VS
1
PD
8
93 7811 e
1 (13)
U2795B
TELEFUNKEN Semiconductors
Pin Description
VS
1
8
PD
RFI
2
7
LOi
P
3
6
GND
SO
4
5
IFO
Pin
1
2
3
4
5
6
7
8
Symbol
VS
RFi
P
SO
IFO
GND
LOi
PD
Function
Supply voltage
RF input
Progamming port IP3, CP
Output symmetry
IF output
Ground
LO input
Power down
94 7890 e
Functional Description
Supply Voltage
Current Consumption, IS
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.
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.
Input Impedance
Input impedance, ZRFi, is about 700 with an additional
capacitive component. This condition provides the best
noise figure in combination with a matching network.
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).
3. Order Intercept Point (IP3)
Output Symmetry
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.
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
U2795B
TELEFUNKEN Semiconductors
Absolute Maximum Ratings
Parameters
Symbol
VS
VI
Tj
Tstg
Value
6
0 to VS
125
– 40 to + 125
Unit
V
V
°C
°C
SO 8
Symbol
Rthja
Value
175
Unit
K/W
Parameters
Supply voltage range
Pin 1
Ambient temperature range
Symbol
VS
Tamb
Value
2.7 to 5.5
– 40 to + 85
Unit
V
°C
Supply voltage
Input voltage
Junction temperature
Storage temperature range
Pin 1
Pins 2, 3, 7 and 8
Thermal Resistance
Parameters
Junction ambient
Operating Range
Rev. A2: 08.06.1995
3 (13)
U2795B
TELEFUNKEN Semiconductors
Electrical Characteristics
R
VS = 3 V, fLOi = 1 GHz, IF = 900 MHz, RF = 100 MHz, RP = , system impedance Zo = 50 W, Tamb = 25°C, RT = 56 W
reference point Pin 6, unless otherwise specified
Parameters
Supply voltage range
Typical supply current
range 1
Maximum supply current
Conversion power gain
Operating frequencies
RFi frequency
LOi frequency
IFo frequency
Isolation
LO spurious at RFi
RFi to LOi
LO spurious at IFo
Test Conditions / Pin
Pin 1
Pin 1
Pin 1
RL = 50 W, RT =
RL = 50 W, RT = 56 W
IS
PGC
PGC
Pin 2
Pin 7
Pin 5
RFi
fLOi
fIFo
R
Pin 7 to 2
PiLO = –10 to 0 dBm
Pin 2 to 7
PiRF = –25 dBm
Pin 7 to 5,
PiLO = – 10 to 0 dBm
Pin 5 to 7
IFo to LOi
Output (IF)
Output compression point Pin 5
Input (RF)
Input impedance
Pin 2
Input compression point
Pin 2
Third order input
Pin 2
intercept point
Input (LO)
LO level
Pin 7
Voltage standing wave ratio (VSWR)
Input LO
Pin 7
Output IF
Pin 4
Noise performance
Noise figure
PiLO = 0 dBm, RT =
Power down mode
Supply current
Pin 1 VPD < 0.5 V
Pin 1 VPD = 0 V
Power down voltage
“Power ON”
Pin 8 VS = 3.5 to 5.5 V
VS = 2.7 to 3.5 V
“Power DOWN”
Pin 8
Power down current
Pin 8 Power ON
Power DOWN
Settling time
Pin 8 to 5
R
Note 1:
4 (13)
Symbol
VS
IS
Min.
2.7
4
Typ.
Max.
5.5
11
Unit
V
mA
13
mA
dB
dB
2500
2500
2500
MHz
MHz
MHz
9
4
10
50
50
ISLO-RF
ISRF-LO
– 30
35
dBm
dB
ISLO-IF
– 25
dBm
ISIF-LO
30
dB
CPo
– 10
dBm
ZRFi
CPi
IIP3
700Wk0.8pF
– 14
–4
W
dBm
dBm
PiLO
–6
dBm
VSWRLOi
VSWRIFo
<2
<2
NF
10
ISPD
dB
30
<5
VPON
VPDN
IPON
IPDN
tsPD
VS – 0.5
VS
VS + 0.5
VS + 0.5
1
0.15
<5
<30
mA
V
V
V
mA
mA
ms
Depending on RP
Rev. A2: 08.06.1995
U2795B
TELEFUNKEN Semiconductors
–4
3
–5
–1
Gain ( dB )
IIP3 ( dBm )
–6
–7
–5
–8
–9
–9
–13
–10
0
20
94 9235
40
60
Rp ( kW )
80
100
0
20
40
Rp ( kW )
94 9237
Figure 1. IIP3 versus resistor Rp, IF: 900 MHz
60
80
100
Figure 3. Gain versus resistor Rp, LO: 1030 MHz,
level –10 dBm; RF: 130 MHz, –30 dBm, RT = 56 W
0
12
10
8
–10
I s ( mA )
OIP3 ( dBm )
–5
–15
6
4
–20
2
–25
0
20
94 9236
40
60
Rp ( kW )
80
Figure 2. OIP3 versus resistor Rp, IF: 900 MHz
Rev. A2: 08.06.1995
0
100
0
94 9238
20
40
60
Rp ( kW )
80
100
Figure 4. Supply current IS versus resistor Rp
5 (13)
U2795B
TELEFUNKEN Semiconductors
18
12
with RF input matching:
Ls = 220nH, Cp = 4.7pF
10
8
without RT
10
NF ( dB )
Gain ( dB )
14
6
6
4
2
2
with RT = 56 W
–2
0
0
500
1000
1500
2000
2500
IF ( MHz )
94 9239
0
200
Figure 5. Gain versus IF output frequency,
LO level: –6 dBm, RF: 130 MHz, –35 dBm;
parameter: RF input termination
400
600
800
IF ( MHz )
94 9241
Figure 7. Double sideband noise figure versus IF output
frequency; LO: 1000 MHz, level 0 dBm; no RF input matching,
RT left out
0
5
with RT = 56 W
–2
4
–6
without RT
–8
VSWR
IIP3 ( dBm )
–4
–10
3
–12
–14
2
with RF input matching:
Ls = 220 nH, Cp = 4.7 pF
–16
–18
0
94 9240
500
1000
1500
2000
1
100
2500
IF ( MHz )
95 9652
Figure 6. IIP3 versus IF output frequency,
LO level: –6 dBm; RF: 130 MHz / 130.1 MHz,
–35 dBm; parameter: RF input termination
6 (13)
280
460
640
820
1000
IF Frequency ( MHz )
R
Figure 8. Typical VSWR frequency response
of the IF output, RP =
Rev. A2: 08.06.1995
U2795B
TELEFUNKEN Semiconductors
j
0.5j
2j
0.2j
5j
ÁÁ
ÁÁ
0
0.2
ÁÁ Á
ÁÁ Á
0.5
1
Á
Á
2
Á
Á
1
5
–0.2j
–5j
–0.5j
–2j
94 9473
–j
R
Figure 9. Typical Impedance of the output versus RP at frequency fIFo = 900 MHz
/ 22 kW / 10 kW / 8.2 kW / 5.6 kW
markers (from left to right): RP =
Rev. A2: 08.06.1995
7 (13)
U2795B
TELEFUNKEN Semiconductors
j
0.5j
2j
0.2j
5j
ÁÁ ÁÁ ÁÁ
ÁÁ ÁÁ ÁÁ
0
0.2
0.5
1
Á
Á
Á
Á
2
1
5
–0.2j
–5j
–0.5j
–2j
95 9651
–j
Figure 10. Typical S11 frequency response of the IF output, RP =
IF frequency from 100 MHz to 1000 MHz, marker: 900 MHz
8 (13)
R,
Rev. A2: 08.06.1995
U2795B
TELEFUNKEN Semiconductors
j
0.5j
2j
5j
0.2j
ÁÁ
ÁÁ
0
0.2
ÁÁ Á
ÁÁ Á
0.5
1
Á
Á
Á
Á
2
1
5
–0.2j
–5j
–0.5j
–2j
95 9653
–j
R
Figure 11. Typical S11 frequency response of the RF intput, RP = , RT =
RF frequency from 100 MHz to 1000 MHz, marker: 900 MHz
Rev. A2: 08.06.1995
R
9 (13)
U2795B
TELEFUNKEN Semiconductors
j
0.5j
2j
0.2j
5j
ÁÁ ÁÁ ÁÁ
ÁÁ ÁÁ ÁÁ
0
0.2
0.5
1
Á
Á
Á
Á
2
1
5
–0.2j
–5j
–0.5j
–2j
95 9654
–j
Figure 12. Typical S11 frequency response of the LO intput, RP =
LO frequency from 100 MHz to 1000 MHz, marker: 900 MHz
10 (13)
R,
Rev. A2: 08.06.1995
U2795B
TELEFUNKEN Semiconductors
Application Circuit (Evaluation Board)
94 8512
Application
94 8511
C1
VS
8
2
7
RP
3
C6
C3
PD
C5
C2
RF
U2795 B
RT
C7
1
LO
6
C4
4
5
IF
RSO
RI
Rev. A2: 08.06.1995
11 (13)
U2795B
TELEFUNKEN Semiconductors
t
Part List
C1
C2, C3, C4, C5, C6, C7
*RP
*RSO
RT
Application Board
10 nF
100 pF
50- Microstrip
68 optional
56 With the part list values, the PD settling time is 20 s.
Using other values, time requirements in burst-mode
appli- cations have to be considered.
Values of RSO and RP depending on the input and output
condition requirements. For RSO 68 is recommended.
With the optional RI the intercept and compression point
can be slightly increased; values between 500 and 1 k
are suitable. Please note that such modification will also
increase the supply current.
Ordering Information
Extended Type Number
U2795B-FP
Package
SO 8
95 9697
Dimensions in mm
Package: SO 8
94 8862
12 (13)
Rev. A2: 08.06.1995
TELEFUNKEN Semiconductors
U2795B
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. A2: 08.06.1995
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