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BAL-2690D3U Datasheet(PDF) 1 Page - STMicroelectronics

Part # BAL-2690D3U
Description  50 / 30j25 balun transformer for 2.45 GHz ISM band
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

BAL-2690D3U Datasheet(HTML) 1 Page - STMicroelectronics

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February 2010
Doc ID 16056 Rev 2
1/8
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BAL-2690D3U
50 / 30+j25 balun transformer for 2.45 GHz ISM band
Features
50
Ω nominal input / 30+j25 output differential
impedance
Low insertion loss
Low amplitude imbalance
Low phase imbalance
Small footprint: BAL-2690D3U < 1 mm²
Benefits
Very low profile (<700 µm)
High RF performances
RF BOM and area reduction
Applications
Balun transformer for applications such as:
Bluetooth STLC2690
Mobile phone
Description
The BAL-2690D3U is a balun designed to
transform single ended signals to differential
signals in Bluetooth applications.
The BAL-2690D3U has been customized for the
STLC2690 Bluetooth transceiver with 0.8 dB
insertion losses in the bandwidth
(2400 MHz - 2500 MHz) and with a specific
requirement for the SCC22 parameter.
The BAL-2690D3U has been designed using
STMicroelectronics IPD (integrated passive
device) technology on non conductive glass
substrate to optimize RF performances.
Figure 1.
Top view
Figure 2.
Application schematic
TM: IPAD is a trademark of STMicroelectronics.
Flip-Chip
4 bumps
SE
GND
BAL +
BAL
-
Z
C
Top View
A1
B1
B2
A2
-
ZC
A1
B1
B2
A2
SE
B2
B1
A2
BAL+
GND
BAL-
RF input
RF balanced ouput
Ground
RF balanced ouput
A1
Name Description
Bump
Band
Pass
Filter
BT
RFIC
BT
Balun
2.4G
Antenna
WLAN
PA
+ SP3T
www.st.com


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