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Ideal for 926.0 MHz, 3 V Data Receivers in the USA and Canada
High-Sensitivity Passive Design with No RF Oscillation
Baseband Data Rate of 20kbps
Simple to Apply with External Parts Count
Rugged, Surface-Mount Package with 130 mm
2
Footprint
SM-10 Case
This amplifier-sequenced hybrid (ASH) receiver is based on several leading-edge
technologies that allow outstanding performance in a small and simple-to-apply
module. Two surface-accoustic-wave (SAW) devices are employed. Front-end fil-
tering by a low-loss coupled-resonator SAW filter provides excellent selectivity.
Typical sensitivity better than -80 dBm is achieved with no RF oscillating or regenerative circuits. This results in virtually no RF spuri-
ous emissions. A low-loss SAW delay line provides the time delay necessary to sequence the two RF amplifiers. Time sequencing of
the RF gain eliminates the need for frequency conversion prior to AM detection. This receiver is designed to operate from a 3 V lithium
battery with typically 4.5 mA current. For system design flexibility, the baseband output is accessible, and the comparator threshold can
be changed externally between two settings. Typical applications include unlicensed wireless remote-controls and digital data links
operating in the USA under FCC Part 15.249 and in Canada under DOC RSS-210.
Electrical Characteristics
Characteristic
Operating Radio Frequency
Received Carrier Modulation Type
RF Band
Sensitivity
Operating Signal Strength
Channel Width
Input Impedance
Interference Rejection
Sequencing (Sampling)
Baseband
Comparator Threshold
Digital Output
Half-Frequency Spurious
f
C
鹵 1 MHz
Sample Duration
Sample Repetition Rate
3 dB Bandwidth
Default (Terminal 5 NC)
Override (Terminal 5 LOW)
CMOS Load Capacitance
Output HIGH Voltage
Output LOW Voltage
Rise Time
Fall Time
Power Supply
Operating Voltage
Current at 25擄C and 3.0 V
Operating Ambient Temperature
Lid Symbolization (in addition to Lot and/or Date Codes)
V
OH
V
OL
t
R
t
F
V
CC
I
CC
T
A
1
1
2.7
-20
RFM RX2256
11
V
CC
-0.2
0.0
3
3
3.0
4.5
3.5
6
+70
Z
IN
7
8
Sym
f
C
Notes
2, 3
4, 5
Minimum
Typical
926.0 Nominal
Pulse Modulation (OOK)
-71
-10
f
C
鹵200
50 Nominal
80
15
700
625
56
25
0
10
V
CC
0.2
Maximum
Units
MHz
dBm
kHz
W
dB
ns
kHz
kHz
mV
p
F
V
ms
VDC
mA
擄C
6
10
Phone: (972) 233-2903
Fax: (972) 387-9148
漏1998 by RF Monolithics, Inc. The stylized RFM logo are registered trademarks of RF Monolithics, Inc.
E-mail: info@rfm.com
http://www.rfm.com
RX2256-121198
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