鈥?/div>
Ideal for 303.825 MHz, 3 V Data Receivers in the UK and the USA
High-Sensitivity Passive Design with No RF Oscillation
Baseband Data Rate of 10 kb/s
Simple to Apply with External Parts Count
Rugged, Surface-Mount Package with 130 mm
2
Footprint
This amplifier-sequenced hybrid (ASH) receiver is based on several leading-edge technologies that allow out-
standing performance in a small and simple-to-apply module. Two surface-accoustic-wave (SAW) devices
are employed. Front-end filtering by a low-loss coupled-resonator SAW filter provides excellent selectivity.
Typical sensitivity better than -92 dBm is achieved with no RF oscillating or regenerative circuits. This results
in virtually no RF spurious emissions. A low-loss SAW delay line provides the time delay necessary to se-
quence 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 1.3 mA cur-
rent. 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,
security and data-link devices operating in the USA under FCC Part 15, in Australia, in Japan, and in Korea.
303.825 MHz
ASH
Receiver
SM-10 Case
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
Data 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 25C 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
-40
RFM RX1120
11
V
CC
-0.2
0.0
3
3
3.0
1.3
3.5
1.4
+85
Z
IN
7
8
9
10
6
f
C
鹵200
50 Nominal
105
20
700
250
20
24
25
0
10
V
CC
0.2
Sym
f
C
Notes
2, 3
4, 5
Minimum
Typical
Maximum
303.825 Nominal
-92
-10
Units
MHz
Pulse Modulation (OOK)
dBm
kHz
W
dB
ns
kHz
kbps
kHz
mV
p
F
V
碌s
VDC
mA
擄C
RF Monolithics, Inc.
Phone: (972) 233-2903
Fax: (972) 387-9148
RFM Europe
Phone: 44 1963 251383
Fax: 44 1963 251510
漏1999 by RF Monolithics, Inc. The stylized RFM logo are registered trademarks of RF Monolithics, Inc.
E-mail: info@rfm.com
http://www.rfm.com
RX1120-111199
Page 1 of 4
1
2
3
4
