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Product Description
Ordering Information
Typical Applications
Features
Functional Block Diagram
RF Micro Devices, Inc.
7628 Thorndike Road
Greensboro, NC 27409, USA
Tel (336) 664 1233
Fax (336) 664 0454
http://www.rfmd.com
Optimum Technology Matching® Applied
Si BJT
GaAs MESFET
GaAs HBT
Si Bi-CMOS
SiGe HBT
Si CMOS
17
18
26
12
11
9
Linear
RSSI
24
7
5
Gain
Control
47
3
31
30
34
Prescaler
128/129 or
64/65
Phase
Detector &
Charge Pump
41
40
39
38
35
36
Lock
Detector
42
43
Ref
Select
37
14
13
DATA OUT
RSSI
DIV CTRL
MOD CTRL
OSC SEL
23
21
20
22
16
15
MIX OUT-
MIX OUT+
MIX IN
LNA OUT
RX IN
TX OUT
45 PRESCL OUT
28
27
25 FM OUT
RF2905
433/868/915MHZ FM/FSK/ASK/OOK
TRANSCEIVER
• Wireless Meter Reading
• Keyless Entry Systems
• 433/868/915MHz ISM Band Systems
• Wireless Data Transceiver
• Wireless Security Systems
• Battery Powered Portable Devices
The RF2905 is a monolithic integrated circuit intended for
use as a low cost FM transceiver. The device is provided
in 7 mmx7mm, 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.
• 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
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)
11
Rev B11 010516
Dimensions in mm.
7.00
+0.10 sq.
9.00
+0.20 sq.
0.22
+0.05
7° MAX
0° MIN
0.60
0.15
0.10
+
0.127
1.40
+0.05
0.50
0.35
0.25
Package Style: LQFP-48, 7x7
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