RO2136
" Ideal for European 433.92MHz Superhet Receiver LOs
" Very Low Series Resistance
432.920 MHz
" Quartz Stability
" Rugged, Hermetic, Low-Profile TO39 Case
SAW
The RO2136 is a true one-port, surface-acoustic-wave (SAW) resonator in a low-profile TO39 case. It pro-
Resonator
vides reliable, fundamental-mode, quartz frequency stabilization of local oscillators operating at approxi-
mately 432.920MHz. This SAW is designed for IC based 433.92MHz superhet receivers with 1 MHz IF
(Philips UAA3201T). Applications include remote-control and wireless security devices operating in Europe
under ETSI I-ETS 300 220 and in Germany under FTZ 17 TR 2100.
Absolute Maximum Ratings
Rating Value Units
CW RF Power Dissipation (See: Typical Test Circuit) +0 dBm
DC Voltage Between Any Two Pins (Observe ESD Precautions) Ä…30 VDC
TO39-3 Case
Case Temperature -40 to +85 °C
Electrical Characteristics
Characteristic Sym Notes Minimum Typical Maximum Units
Center Frequency (+25 °C) Absolute Frequency fC 432.845 432.995 MHz
2, 3, 4, 5
Tolerance from 432.920 MHz "fC Ä…75 kHz
Insertion Loss IL 2, 5, 6 1.8 2.0 dB
Quality Factor Unloaded Q QU 10,311
5, 6, 7
50 &! Loaded Q QL 1,930
Temperature Stability Turnover Temperature TO 10 25 40 °C
Turnover Frequency fO 6, 7, 8 fc
Frequency Temperature Coefficient FTC 0.037
ppm/°C2
Frequency Aging Absolute Value during the First Year |fA| 1 d"10 ppm/yr
DC Insulation Resistance between Any Two Pins 5 1.0 M&!
RF Equivalent RLC Model Motional Resistance RM 23 26 &!
Motional Inductance LM 5, 7, 9 87.1849 µH
Motional Capacitance CM 1.55019 fF
Pin 1 to Pin 2 Static Capacitance CO 5, 6, 9 1.8 2.1 2.4 pF
Transducer Static Capacitance CP 5, 6, 7, 9 1.8 pF
Test Fixture Shunt Inductance LTEST 2, 7 65 nH
Lid Symbolization (in Addition to Lot and/or Date Codes) RFM RO2136
CAUTION: Electrostatic Sensitive Device. Observe precautions for handling.
Notes:
1. Frequency aging is the change in fC with time and is specified at +65°C or less. 7. Derived mathematically from one or more of the following directly measured
parameters: fC, IL, 3 dB bandwidth, fC versus TC, and CO.
Aging may exceed the specification for prolonged temperatures above +65°C.
Typically, aging is greatest the first year after manufacture, decreasing signifi- 8. Turnover temperature, TO, is the temperature of maximum (or turnover) fre-
cantly in subsequent years.
quency, fO. The nominal frequency at any case temperature, TC, may be calcu-
2. The center frequency, fC, is measured at the minimum insertion loss point, ILMIN,
lated from: f =fO [1- FTC(TO -TC)2]. Typically, oscillator TO is 20°C less than
with the resonator in the 50 &! test system (VSWR d" 1.2:1). The shunt induc-
tance, LTEST, is tuned for parallel resonance with CO at fC. Typically, fOSCILLA- the specified resonator TO.
9. This equivalent RLC model approximates resonator performance near the reso-
or fTRANSMITTER is less than the resonator fC.
TOR
nant frequency and is provided for reference only. The capacitance CO is the
3. One or more of the following United States patents apply: 4,454,488 and
static (nonmotional) capacitance between pin1 and pin 2 measured at low fre-
4,616,197 and others pending.
quency (10MHz) with a capacitance meter. The measurement includes case
4. Typically, equipment designs utilizing this device require emissions testing and
parasitic capacitance with a floating case. For usual grounded case applica-
government approval, which is the responsibility of the equipment manufacturer.
tions (with ground connected to either pin 1 or pin 2 and to the case), add
5. Unless noted otherwise, case temperature TC =+25°CÄ…2°C.
approximately 0.25pF to CO.
6. The design, manufacturing process, and specifications of this device are subject
to change without notice.
RF Monolithics, Inc. Phone: [phone] Fax: [phone] E-mail: [e-mail] Page 1 of 2
RFM Europe Phone: [phone] Fax: [phone] http://www.rfm.com
©1999 by RF Monolithics, Inc. The stylized RFM logo are registered trademarks of RF Monolithics, Inc. RO2136-102699
432.920 MHz SAW Resonator
Electrical Connections Temperature Characteristics
This one-port, two-terminal SAW resonator is bidirectional. The terminals
are interchangeable with the exception of circuit board layout. fC = fO , TC = TO
The curve shown on the right
0 0
accounts for resonator contri-
Pin Connection
bution only and does not in- -50 -50
Bottom View
clude oscillator temperature
1 Terminal 1
-100 -100
characteristics.
Pin 1
Pin 2
2 Terminal 2
-150
-150
3 Case Ground
-200 -200
Pin 3
-80 -60 -40 -20 0 +20 +40 +60 +80
T = TC - TO ( °C )
"
Typical Test Circuit
The test circuit inductor, LTEST, is tuned to resonate with the static capaci-
tance, CO at FC.
Equivalent LC Model
Electrical Test:
The following equivalent LC model is valid near resonance:
1 2
&!
&!
2
1
Network
Network
Analyzer Analyzer
Co= Cp
+0.25 pF*
Cp
3
*Case Parasitics
R L CM
M M
0.5 pF*
0.5 pF*
Power Test:
3
1
P
INCIDENT
Low-Loss
50&!
Matching
Source at
PREFLECTED
Case Design
Network
F
C &! 3
to 50
2
C G
B
CW RF Power Dissipation = P - P
INCIDENT REFLECTED
H
F
Typical Application Circuits E
A
D
(3 places)
Typical Low-Power Transmitter Application:
J
(2 places)
200k &!
45°
MPS-H10
Modulation
+9VDC
Input
47
C1
L1
1
2 (Antenna)
Millimeters Inches
Dimensions
C2 Min Max Min Max
ROXXXX
3
Bottom View RF Bypass
A 9.30 0.366
470
B 3.18 0.125
C 2.50 3.50 0.098 0.138
D 0.46 Nominal 0.018 Nominal
Typical Local Oscillator Application:
E 5.08 Nominal 0.200 Nominal
Output
+VDC F 2.54 Nominal 0.100 Nominal
C1 G 2.54 Nominal 0.100 Nominal
L1
+VDC
1
2
H 1.02 0.040
J 1.40 0.055
C2
ROXXXX
3
Bottom View RF Bypass
RF Monolithics, Inc. Phone: [phone] Fax: [phone] E-mail: [e-mail] Page 2 of 2
RFM Europe Phone: [phone] Fax: [phone] http://www.rfm.com
©1999 by RF Monolithics, Inc. The stylized RFM logo are registered trademarks of RF Monolithics, Inc. RO2136-102699
(ppm)
/
o
o
(f-f ) f