916.5 MHz

SAW Resonator

RF Monolithics, Inc.

Phone: (972) 233-2903

Fax: (972) 387-8148

E-mail: info@rfm.com

Page 2 of 2

RFM Europe

Phone: 44 1963 251383

Fax: 44 1963 251510

http://www.rfm.com

©1999 by RF Monolithics, Inc. The stylized RFM logo are registered trademarks of RF Monolithics, Inc.

RO2144D_RO2144D-1_RO2144D-2_083104

-80 -60 -40 -20

0 +20 +40 +60

0

-50

-100

-150

+80

-200

0

-50

-100

-150

-200

f

∆T = T

0.05 pF*

0.05 pF

Cp

Co

+

=

*Case Parasitics

Cp

Rm

Lm

Cm

Equivalent LC Mode

l

Temperature Characteristics

The curve shown on the right accounts for resonator contribution only and

does not include LC component temperature contributions

.

Pin

Connection

1

NC

2

Terminal

3

NC

4

NC

5

Terminal

6

NC

Power Test

Electrical Connections

The SAW resonator is bidirectional and

may be installed with either orientation.

The two terminals are interchangeable

and unnumbered. The callout NC indi-

cates 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

Electrical Test

Typical Application Circuits

From 50

Ω

Network Analyzer

To 50

Ω

Network Analyzer

2

3

6

5

4

1

Low-Loss

Matching

Network to

50

Ω

50

Ω Source

at F

C

P

INCIDENT

P

REFLECTED

2

3

6

5

4

1

Modulation

Input

ROXXXXC

Bottom View

200k

Ω

C1

L1

(Antenna)

47

+9VDC

C2

RF Bypass

470

Typical Low-Power Transmitter Application

2

3

6

5

4

1

+VDC

ROXXXXC

Bottom View

200k

Ω

C1

L1

+VDC

C2

RF Bypass

Typical Local Oscillator Application

Output

2

3

6

5

4

1

1

2

3

6

5

4

1

2

3

6

5

4

A

B

C

D

J

E

G

H

I

Case Dimensions

Dimension

mm

Inches

Min

Nom

Max

Min

Nom

Max

A

3.60

3.80

4.0

0.14

0.15

0.16

B

3.60

3.80

4.0

0.14

0.15

0.16

C

1.00

1.20

1.40

0.04

0.05

0.055

D

0.95

1.10

1.25

0.037

0.043

0.05

E

2.39

2.54

2.69

0.090

0.10

0.110

G

0.90

1.0

1.10

0.035

0.04

0.043

H

1.90

2.0

2.10

0.75

0.08

0.83

I

0.50

0.6

0.70

0.020

0.024

0.028

J

1.70

1.8

1.90

0.067

0.07

0.075