ACMD-7602-TR1 Avago Technologies US Inc., ACMD-7602-TR1 Datasheet - Page 8

• Manufacturer Part Number: ACMD-7602-TR1
• Description: Duplexer,FBAR,UMTS-2100 For WCDMA
• Manufacturer: Avago Technologies US Inc.

Specifications of ACMD-7602-TR1

• Frequency Bands (low / High): 1.92GHz ~ 1.98GHz / 2.11GHz ~ 2.17GHz
• Low Band Attenuation (min / Max Db): 53.00dB / -
• High Band Attenuation (min / Max Db): 41.00dB / -
• Return Loss (low Band / High Band): 20dB / 16dB
• Mounting Type: Surface Mount
• Package / Case: 3-CSP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

Figure 20. PCB layout
A PCB layout implementing design principles similar to
those illustrated in Figure 16 is recommended to opti-
mize performance of the ACMD-7602.
It is particularly important to maximize isolation be-
tween the Tx connection to the duplexer and the Rx port.
High isolation is achieved by (1) maintaining a continu-
ous ground plane around the duplexer mounting area,
(2) surrounding the I/O ports with sufficient ground
vias to enclose the connections in a “Faraday cage”, and
(3) preferably routing the Tx trace in a different metal
layer than the Rx.
The latter is especially useful, not only to maintain Tx-Rx
isolation of the duplexer, but also to prevent leakage of
the Tx signal into other components that could result in
the creation of intermodulation products and degrada-
tion of overall system performance.
8
Ø 0.20 VIA ARRAY
HORIZ PITCH = 0.33
VERT PITCH = 0.38
W
0.10
G
Rx
Notes:
1. Dimensions in mm.
2. Transmission line Gap (G) and Width (W) adjusted for Zo = 50 ohms.
3. I/O Pads (3 ea) 0.53 x 0.53, corner chamfer 0.30.
4. I/O Pad to Ground plane gap = 0.34, corner chamfer 0.30.
5. Ground vias positioned to maximize port-to-port isolation.
0.10
2.27
Ant
Figure 21. ACMD-7602 superposed on PCB layout
Tx
Ø 0.20 VIA ARRAY
HORIZ PITCH = 0.33
VERT PITCH = 0.38
Ø 0.20 VIA ARRAY
HORIZ PITCH = 0.38
VERT PITCH = 0.33
Ø 0.20 VIA ARRAY
HORIZ PITCH = 0.38
1.78