RF2905
11
Typical Applications
• Wireless Meter Reading
• Keyless Entry Systems
• 433/868/915MHz ISM Band Systems
• Wireless Data Transceiver
• Wireless Security Systems
• Battery Powered Portable Devices
433/868/915MHZ FM/FSK/ASK/OOK
TRANSCEIVER
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.
9.00
+ 0.20 sq.
0.35
0.25
0.50
7.00
+ 0.10 sq.
0.22
+ 0.05
1.40
+ 0.05
Dimensions in mm.
7° MAX
0° MIN
0.60
+ 0.15
0.10
0.127
Optimum Technology Matching® Applied
ü
Si BJT
Package Style: LQFP-48, 7x7
GaAs HBT
SiGe HBT
LOCK DET
LOOP FLT
RESNTR+
RESNTR-
GaAs MESFET
Si CMOS
Si Bi-CMOS
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
11
TRANSCEIVERS
LVL ADJ
OSC B1
47
Gain
Control
TX OUT
RX IN
3
5
34
31
30
41
42
43
Lock
Detector
40
39
38
Phase
Detector &
Charge Pump
Ref
Select
OSC B2
37 OSC SEL
45 PRESCL OUT
36 MOD CTRL
35 DIV CTRL
24 RSSI
25 FM OUT
26 DATA OUT
MOD IN
VREF P
LNA OUT
MIX IN
MIX OUT+
MIX OUT-
7
9
11
12
Prescaler
128/129 or
64/65
Linear
RSSI
OSC E
13
IF1 IN+
14
IF1 IN-
15
IF1 BP+
16
IF1 BP-
17
IF1 OUT
18
IF2 IN
20
VREF IF
21
IF2 BP+
22
IF2 BP-
28
IF2 OUT
27
DEMOD IN
23
MUTE
Ordering Information
RF2905
RF2905 PCBA-L
RF2905 PCBA-M
RF2905 PCBA-H
433/868/915MHz FM/FSK/ASK/OOK Transceiver
Fully Assembled Evaluation Board (433MHz)
Fully Assembled Evaluation Board (868MHz)
Fully Assembled Evaluation Board (915MHz)
Tel (336) 664 1233
Fax (336) 664 0454
http://www.rfmd.com
Functional Block Diagram
RF Micro Devices, Inc.
7628 Thorndike Road
Greensboro, NC 27409, USA
Rev B11 010516
11-53
RFMD [ RF MICRO DEVICES ]
