RF2958 Просмотр технического описания (PDF) - RF Micro Devices

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Компоненты Описание

производитель

RF2958

2.4GHz SPREAD-SPECTRUM TRANSCEIVER

RF Micro Devices 

RF2958

PCB Solder Mask Pattern

Liquid Photo-Imageable (LPI) solder mask is recommended. The solder mask footprint will match what is shown for the

PCB Metal Land Pattern with a 3mil expansion to accommodate solder mask registration clearance around all pads. The

center-grounding pad shall also have a solder mask clearance. Expansion of the pads to create solder mask clearance

can be provided in the master data or requested from the PCB fabrication supplier.

A = 0.79 x 0.38 (mm) Typ.

B = 0.38 x 0.79 (mm) Typ.

C = 3.55 (mm) Sq.

0.50 (mm) Typ.

3.50 (mm)

Typ.

Pin 32

BBBBBBBB

Pin 1

A

0.50 (mm) Typ.

A

A

Pin 24

A

A

1.75 (mm)

A

Typ.

A

A

C

A

3.50 (mm)

A

Typ.

A

A

A

A

0.63 (mm) Typ.

A

A

BBBBBBBB

Pin 16

0.63 (mm) Typ.

1.75 (mm)

Typ.

Figure 2. PCB Solder Mask Pattern (Top View)

Thermal Pad and Via Design

The PCB Metal Land Pattern has been designed with a thermal pad that matches the exposed die paddle size on the

bottom of the device.

Thermal vias are required in the PCB layout to effectively conduct heat away from the package. The via pattern has been

designed to address thermal, power dissipation and electrical requirements of the device as well as accommodating

routing strategies.

The via pattern used for the RFMD qualification is based on thru-hole vias with 0.203mm to 0.330mm finished hole size

on a 0.5mm to 1.2mm grid pattern with 0.025mm plating on via walls. If micro vias are used in a design, it is suggested

that the quantity of vias be increased by a 4:1 ratio to achieve similar results.

11-282

Rev A0 050209

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