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RF2905

433/868/915MHZ FM/FSK/ASK/OOK TRANSCEIVER

RF Micro Devices 

11

Typical Applications

• Wireless Meter Reading

• Keyless Entry Systems

• 433/868/915MHz ISM Band Systems

RF2905

433/868/915MHZ FM/FSK/ASK/OOK

TRANSCEIVER

• Wireless Data Transceiver

• Wireless Security Systems

• Battery Powered Portable Devices

Product Description

The RF2905 is a monolithic integrated circuit intended for

use as a low cost FM transceiver. The device is provided

in 7mmx7mm, 48-lead plastic LQFP packaging and is

designed to provide a fully functional FM transceiver. The

chip is intended for linear (AM, FM) or digital (ASK, FSK,

OOK) applications in the North American 915MHz ISM

band and European 433MHz and 868MHz ISM bands.

The integrated VCO, dual modulus/dual divide (128/129

or 64/65) prescaler, and reference oscillator require only

the addition of an external crystal to provide a complete

phase-locked oscillator.

Optimum Technology Matching® Applied

üSi BJT

GaAs HBT

GaAs MESFET

Si Bi-CMOS

SiGe HBT

Si CMOS

TX OUT 3

RX IN 5

LNA OUT 7

MIX IN 9

MIX OUT+ 11

MIX OUT- 12

47 34 31 30

41 42

43

Gain

Control

Phase

Detector &

Charge Pump

Lock

Detector

Prescaler

128/129 or

64/65

Linear

RSSI

40 39 38

Ref

Select

37 OSC SEL

45 PRESCL OUT

36 MOD CTRL

35 DIV CTRL

24 RSSI

25 FM OUT

26 DATA OUT

13 14 15

16 17 18 20

21

22 28 27

23

Functional Block Diagram

9.00

+ 0.20 sq.

7.00

+ 0.10 sq.

0.35

0.25

0.50

0.22

+ 0.05

7° MAX

0° MIN

1.40

+ 0.05

Dimensions in mm.

0.60

+ 0.15

0.10

0.127

Package Style: LQFP-48, 7x7

Features

• Fully Monolithic Integrated Transceiver

• 2.7V to 5.0V Supply Voltage

• Narrow Band and Wide Band FM/FSK

• 300MHz to 1000MHz Frequency Range

• 10dB Cascaded Noise Figure

• 10mW Output Power at 433MHz

Ordering Information

RF2905

433/868/915MHz FM/FSK/ASK/OOK Transceiver

RF2905 PCBA-L Fully Assembled Evaluation Board (433MHz)

RF2905 PCBA-M Fully Assembled Evaluation Board (868MHz)

RF2905 PCBA-H Fully Assembled Evaluation Board (915MHz)

RF Micro Devices, Inc.

7628 Thorndike Road

Greensboro, NC 27409, USA

Tel (336) 664 1233

Fax (336) 664 0454

http://www.rfmd.com

11

Rev B11 010516

11-53

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