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RF2884

DS20130228

7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical

support, contact RFMD at ((+1) 336-678-5570 or ssales-support@rfmd.com.

Package Drawing

QFN, 12-Lead, 3x3

Pin

Function

Description

Interface Schematic

1NC

No connection. Pin not used.

2GC

This pin selects high gain or bypass mode.

GC<0.8V, high gain.

GC>1.8V, low gain.

3NC

No connection. Pin not used.

4RF OUT

Amplifier output pin. This pin is an open-collector output. It must be biased

to 50 with a shunt bias/matching inductor and series blocking/matching

capacitor. Refer to application schematics.

See pin 6.

5NC

No connection. Pin not used.

6RF IN

RF input pin. A simple matching network is used to match to 50 .

7NC

No connection. Pin not used.

8VCC

Supplies bias to control circuitry. An external bypass capacitor may be used

to decouple bias. An external resistor also allows adjustment of the LNA

operating current. A 0 resistor allows maximum operating current.

Increasing series resistance lowers LNA current. The voltage at pin 8 must

remain above 2.0V.

9NC

No connection. Pin not used.

10

NC

No connection. Pin not used.

11

NC

No connection. Pin not used.

12

NC

No connection. Pin not used.

Pkg

Base

GND

Ground connection. The backside of the package should be soldered to a

top side ground pad which is connected to the ground plane with multiple

vias.

RF IN

RF OUT

VCC

Shaded lead is pin 1.

Dimensions in mm.

0.05

0.00

0.70

0.65

0.05 C

0.90

0.85

12°

MAX

-C-

SEATING

PLANE

3.00

2 PLCS

0.10 C B

-B-

2.75 SQ

2 PLCS

0.10 C B

2 PLCS

0.10 C A

-A-

2 PLCS

0.10 C A

3.00

0.60

0.24

TYP

0.75

0.50

0.50

1.25

0.95

SQ.

0.10

C AB

M

0.30

0.18

PIN 1 ID

R.20