ACFF-1025 datasheet(8/12 Pages) AVAGO

Part #	ACFF-1025

Description	LTE Band 41 Bandpass Filter

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Manufacturer	AVAGO [AVAGO TECHNOLOGIES LIMITED]

Direct Link	http://www.avagotech.com

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8

Figure 22. Suggested PCB Land Pattern.

A PCB layout using the principles illustrated in the figure

above is recommended to optimize performance of the

ACFF-1025.

Transmission line dimensions should be adjusted to

maintain a Zo of 50 ohms.

It is important to maximize isolation between the filter

Input and Output ports.

High isolation is achieved by: (1) maintaining a continu-

ous ground plane around the I/O connections and filter

mounting area, and (2) surrounding the I/O ports with

sufficient ground vias to enclose the connections in a

“Faraday cage.”

Ground vias under the ACFF-1025 mounting area also

provide heat sinking for the device to minimize shifting of

the pass band over temperature.

Notes:

1. Dimensions in mm

2. Top view

ACFF-1025

Figure 23. PCB Layout, Via Detail.

Notes:

1. Dimensions in mm

2. Top view

0.95

(REF)

0.50X0.50

LAND PAD

(2X)

ADJUST FOR

50 OHMS

0.25 TYP

1.95

1.05

0.90

(REF)

0.95X0.90, CHAMFER 0.12X45°

GROUND PLANE OPENING FOR PAD

(2X)

0.20

(REF)

0.125 (REF)

VIA ARRAY 2

8X2 ARRAY

(4X)

0.125

0.250

(ALL)

0.250 (ALL)

Ø 0.10

(ALL)

VIA ARRAY 1

4x9 ARRAY

CENTERED ON

LAND PATTERN

0.125

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ACFF-1025 Datasheet(PDF) 8 Page - AVAGO TECHNOLOGIES LIMITED

ACFF-1025 Datasheet(HTML) 8 Page - AVAGO TECHNOLOGIES LIMITED

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