RF2926
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
UHF DUAL CONVERSION TRANSCEIVER
Product Description
The RF2926 is a monolithic integrated circuit intended for
use as a low cost FM transceiver. The device is provided
in 48-lead plastic TQFP packaging and is designed to
provide a dual conversion, half-duplex transceiver. The
chip is intended for linear (AM, FM) or digital (ASK, FSK,
OOK) applications in the North American 915MHz and
European 433/868MHz ISM bands. The integrated VCO
has a buffered output to feed the RF signal back to the
PLL IC to form the frequency synthesizer. Separate RX
ENABL, TX ENABL, and PLL ENABL lines allow for half
duplex operation as well as turning on the VCO to give
the synthesizer time to settle and complete power down-
mode.
.362
.346
.006
.002
.020
.362
.346
.280
.272
.011
.007
.057
.053
.280
.272
7°MAX
0°MIN
.031
.021
.007
MAX
Optimum Technology Matching® Applied
ü
Si BJT
Package Style: LQFP-48
GaAs HBT
SiGe HBT
UP CONV
LVL ADJ
PA INP
LO+
LO-
GaAs MESFET
Si CMOS
Si Bi-CMOS
Features
• Monolithic Integrated Transceiver
• 2.7V to 5.0V Supply Voltage
35
VCO OUT
11
TRANSCEIVERS
46
Gain
Control
TX OUT
RX IN
2
4
44
37
36
39
• Narrow Band and Wide Band FM/FSK
• 300MHz to 1000MHz Frequency Range
• 130MHz Bandwidth in First IF
• 5mW Output Power at 433MHz
34
31
LNA OUT
MIX CA
MIX IN
8
43
28
10
26
RSSI
MIX OUT+
MIX OUT-
12
13
15
IF1 IN
14
IF1 BP+
16
IF1 BP-
18
IF1 OUT
25
RSSI
20
VREF IF
21
IF2 IN
22
IF2 BP+
23
IF2 BP-
24
ATA OUT
27
30
MOD IN
RESNTR-
RESNTR+
DEMOD IN
FM OUT
DATA REF
Ordering Information
RF2926
RF2926 PCBA
UHF Dual Conversion Transceiver
Fully Assembled Evaluation Board
Functional Block Diagram
RF Micro Devices, Inc.
7625 Thorndike Road
Greensboro, NC 27409, USA
Tel (336) 664 1233
Fax (336) 664 0454
http://www.rfmd.com
Rev A5 010404
11-185
RFMD [ RF MICRO DEVICES ]
