U2796B-MFPG3 Atmel, U2796B-MFPG3 Datasheet - Page 8

• Manufacturer Part Number: U2796B-MFPG3
• Description: IC MIXER 2GHZ SGL BALANCED 8SOIC
• Manufacturer: Atmel
• Series: U2796r

Specifications of U2796B-MFPG3

• Rf Type: Cellular, CT1, CT2, DECT, PCN, UHF
• Frequency: 2GHz
• Number Of Mixers: 1
• Gain: 9dB
• Noise Figure: 9dB
• Current - Supply: 3.7mA
• Voltage - Supply: 2.7 V ~ 5.5 V
• Package / Case: 8-SOIC (0.154", 3.90mm Width)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Secondary Attributes: -

Application Circuit
Recommended Values for the Evaluator
C
for resonance with the balun at f
for f
= 50 . R
from:
R
For example ,V
R
out the mixer stage.
Application Hint
The output transformer at the Pins 4 and 5 can be replaced
by LC circuits as shown in figure 13. Compared to trans-
former, LC circuits save space and are suitable for higher
IF frequencies. When applying one of these solutions, it
has to be checked whether the requirements on noise fi-
gure and gain can be achieved.
The second circuit was dimensioned for approximately
130 MHz and a load resistance of 50 W. If, for instance,
U2796B
8 (10)
1
2
2
[ 470 , where I
+
and C
LO.
V
The output balun transformer ratio u = 8:1 for Z
S
2
2
( 4, MinimalMinimal5 ) – V
= 150 pF, C
increases the IF output level and is calculated
S
(4, 5) = 4 V, V
S
I
(1) is the current consumption with-
S
3
( 1 )
and C
4
S
= 100 nF. C
IF,
(1) = 3 V, I
or as a highpass filter
RF
S
( 1 )
i
8
1
C
C 2
U2796B
1
S
r
(1) = 2.2 mA
is calculated
Figure 12. Application circuit
7
2
R
IP3
LO
6
3
C
3
i
O
R
5
4
IF O
IF O
2
the impedance of a subsequent filter is 1 kW, the capaci-
tive voltage divider may be left out.
C
V
L
r
1
S
4
V
8.2 pF
1 mH
S
C 4
N
C
4
TR8/1
IF out
93 7765 e
L
1
2
5
V
220 nH
S
V
C
S
2
Figure 13.
5
10 pF
C
2
Rev. A3, 10-Oct-00
39 pF
R
R
L
= 50 W
95 9632