RO3134A - RFM (RF Monolithics, Inc.)

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Electrical Characteristics

Characteristic Sym Notes Minimum Typical Maximum Units

Frequency, +25 °C Nominal Frequency fC2, 3, 4, 5 372.400 372.600 MHz

Tolerance from 372.500 MHz ∆fC±100 kHz

Insertion Loss IL 2, 5, 6 1.0 2.2 dB

Quality Factor Unloaded Q QU5, 6, 7 15,400

50 Ω Loaded Q QL1,700

Temperature Stability Turnover Temperature TO6, 7, 8 10 25 40 °C

Turnover Frequency fOfC

Frequency Temperature Coefficient FTC 0.032 ppm/°C2

Frequency Aging Absolute Value during the First Year |fA|1, 6 10 ppm/yr

DC Insulation Resistance between Any Two Terminals 5 1.0 MΩ

RF Equivalent RLC Model Motional Resistance RM5, 6, 7, 9 12.7 Ω

Motional Inductance LM83 µH

Motional Capacitance CM2.2 fF

Shunt Static Capacitance CO5, 6, 9 2.4 pF

Test Fixture Shunt Inductance LTEST 2, 7 7 6 nH

Lid Symbolization 836//YYWWSR

• Very Low Series Resistance

• Quartz Stability

• Surface-mount Ceramic Case

• Complies with Directive 2002/95/EC (RoHS)

The RO3134A is a true one-port, surface-acoustic-wave (SAW) resonator in a surface-mount, ceramic case.

It provides reliable, fundamental-mode, quartz frequency stabilization of local oscillators operating at

approximately 372.5 MHz.

Absolute Maximum Ratings

Rating Value Units

CW RF Power Dissipation (See Typical Test Circuit) +10 dBm

DC Voltage Between Terminals (Obs erve ES D Precautions) ±30 VDC

Case Temperature -40 to +85 °C

Soldering Temperature (10 seconds / 5 cycles maximum) 260 °C

372.5 MHz

SAW

Resonator

RO3134A

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. Aging may exceed the specification for prolonged tempera-

tures above +65 °C. Typically, aging is greatest the first year after

manufacture, decreasing in subsequent years.

2. The center frequency, fC, is measured at the minimum insertion loss

point, ILMIN, with the resonator in the 50 Ω test syste m (VSWR ≤

1.2:1). The shunt inductance, LTEST, is tuned for parallel resonance

with CO at f C. T y pical ly, fOSCILLATOR or fTRANSMITTER is approximately

equal to the resonator fC.

3. One or more of the following United States patents apply: 4,454,488

and 4,616,197.

4. Typically, equipment utilizing this device requires emissions testing

and government approval, which is the responsibility of the equipment

manufacturer.

5. Unless noted otherwise, case temperature TC= +25 ± 2 °C.

6. The design, manufacturing process, and specifications of this device

are subject to change without notice.

7. Derived mathematically from one or more of the following directly

measured parameters: fC, IL, 3 dB bandwidth, fC versus TC, and CO.

8. Turnover temperature, TO, is the te m perat ure of maximum (or

turnover) frequency, fO. The nominal frequency at any case

temperature, TC, may be calculated from: f = fO[1 - FTC (TO-TC)2].

Typically oscillator TO is approximately equal to the specified

resonator TO.

9. This equivalent RLC model approximates resonator performance near

the resonant frequency and is provided for reference only. The

capacitance CO is the static (nonmotional) capacitance between the

two terminals measured at low frequency (10 MHz) with a capacitance

meter. The measurem ent includes parasitic capacitance with "NC”

pads unconnected. Case parasitic capacitance is approximately

0.05 pF. Transducer parallel c apacitance can by calculated as:

CP≈CO-0.05pF.

SM5035-4

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Electrical Connections

The SAW resonator is bidirectional and may be

installed with either orientation. T he two terminals

are interchangeable and unnumbered. The callout

NC indicates no internal connection. The NC pads

assist with mechanical positioning and stability.

External grounding of the NC pads is

recommended to help reduce parasitic

capacitance in the circuit.

Typical Test Circuit

The test circuit inductor, LTEST, is tuned to resonate with the static

capacitance, CO, a t FC.

Typical Application Circuits

Equivalent Model

Temperature Characteristics

The curve shown on the right

accounts for resonator

contribution only and does not

include LC component

temperature contributions.

Case

Terminal

Case Ground

ELECTRICAL TEST

From 50 Ω

Network Analyzer To 50 Ω

Networ k A nalyzer

50 Ω Source

at FCREFLECTED

INCIDENT

Low-Loss

Matching

Network to

50 Ω

Terminal

NC NC

POWER T EST

CW RF Power Dissipation = INCIDENT - REFLECTED

P P

(Antenna)

+9VDC

RF Bypass

Modulation

Input

Typical Low-Power Transmitter Application

RO3XXXA

Bottom View 470

200kΩ

Output

+VDC

RF Bypass

+VDC

Typical Local Oscillator Applications

RO3XXXA

Bottom View

Dimensions Millimeters Inches

Min Nom Max Min Nom Max

A 4.87 5.00 5.13 0.191 0.196 0.201

B 3.37 3.50 3.63 0.132 0.137 0.142

C 1.45 1.53 1.60 0.057 0.060 0.062

D 1.35 1.43 1.50 0.040 0.057 0.059

E 0.67 0.80 0.93 0.026 0.031 0.036

F 0.37 0.50 0.63 0.014 0.019 0.024

G 1.07 1.20 1.33 0.042 0.047 0.052

H - 1.04 - - 0.041 -

I - 1.46 - - 0.058 -

J - 0.50 - - 0.019 -

K - 1.05 - - 0.041 -

L - 1.44 - - 0.057 -

M - 0.71 - - 0.028 -

0.05 pF*

0.05 pF

Co+

*Case Parasitics

Lm C m

-80 -60 -40 -20 0 +20 +40 +60

-50

100

150

+80

200

-50

-100

-150

-200

= f

, T

= T

∆

T = T

- T

( °C )

(f-foo

)/f(ppm)

B C

E ( 3 x )

F ( 4 x )

G ( 1 x )

T o p V i e w S i d e V i e w B o t t o m V i e w

H H

PCB Land Pattern

Top View