BAL-2690D3U Datasheet, PDF (1/8 Pages) STMicroelectronics – 50 / 30+j25 balun transformer for 2.45 GHz ISM band

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 S_CC22 parameter.
The BAL-2690D3U has been designed using
STMicroelectronics IPD (integrated passive
device) technology on non conductive glass
substrate to optimize RF performances.
Flip-Chip
4 bumps
Figure 1. Top view
Top View
GND ^AA2
SE BB22
AA11 _{BAL -}
ZZ_CC
BB11 _{BAL +}
Bump Name Description
A1 BAL- RF balanced ouput
A2 GND Ground
B1 BAL+ RF balanced ouput
B2 SE RF input
Figure 2. Application schematic
2.4G
Antenna
Band
Pass
Filter
WLAN
PA
+ SP3T
BT
Balun
BT
RFIC
February 2010
TM: IPAD is a trademark of STMicroelectronics.
Doc ID 16056 Rev 2
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