RO3118【PDF 1/2 页】SAW RESONATOR 318.0MHZ TO39-3

收藏本站

您好，
买卖IC网欢迎您。
请登录
免费注册

买卖IC网

Sheet目录700

[1页]2页

RO3118

Designed for 318 MHz Transmitter Applications

Low Series Resistance

Quartz Stability

318.00 MHz

Rugged, Hermetic, Low-Profile TO39 Case

Complies with Directive 2002/95/EC (RoHS)

SAW

The RO3118 is a true one-port, surface-acoustic-wave (SAW) resonator in a low-profile TO39 case. It provides

reliable, fundamental-mode quartz frequency stabilization of fixed-frequency transmitters operating at or near

318 MHz.

Absolute Maximum Ratings

Resonator

Rating

CW RF Power Dissipation

DC Voltage Between Terminals (Observe ESD Precautions)

Case Temperature

Soldering Temperature (10 seconds / 5 cycles max.

Value

±30

-40 to +85

260

Units

dBm

VDC

°C

TO39-3 Case

Electrical Characteristics

Characteristic

Sym

Notes

Minimum

Typical

Maximum

Units

Frequency (+25 °C)

Insertion Loss

Quality Factor

Nominal Frequency

Tolerance from 318.000 MHz

Unloaded Q

50 Ω Loaded Q

f C

Δ f C

Q U

Q L

2, 3, 4, 5

2, 5, 6

5, 6, 7

317.925

1.5

10700

1400

318.075

±75

2.0

MHz

kHz

Temperature Stability

Turnover Temperature

Turnover Frequency

T O

f O

6, 7, 8

f C +4.2

°C

kHz

Frequency Temperature Coefficient

FTC

0.037

ppm/°C 2

Frequency Aging

Absolute Value during the First Year

|fA|

1, 6

ppm/yr

DC Insulation Resistance between Any Two Pins

1.0

M Ω

RF Equivalent RLC Model

Motional Resistance

R M

Test Fixture Shunt Inductance

Motional Inductance

Motional Capacitance

Pin 1 to Pin 2 Static Capacitance

Transducer Static Capacitance

L M

C M

C O

C P

L TEST

5, 6, 7, 9

5, 6, 9

5, 6, 7, 9

2, 7

3.1

2.6

3.0

μH

Lid Symbolization (in addition to Lot and/or Date Codes)

CAUTION: Electrostatic Sensitive Device. Observe precautions for handling.

Notes:

RFM // RO3118

Frequency aging is the change in f C with time and is specified at +65°C or

less. Aging may exceed the specification for prolonged temperatures

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

decreasing significantly in subsequent years.

The center frequency, f C , is measured at the minimum insertion loss point,

IL MIN , with the resonator in the 50 Ω test system (VSWR ≤ 1.2:1). The

shunt inductance, L TEST , is tuned for parallel resonance with C O at f C .

Typically, f OSCILLATOR or f TRANSMITTER is less than the resonator f C .

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

4,616,197 and others pending.

Typically, equipment designs utilizing this device require emissions testing

and government approval, which is the responsibility of the equipment

manufacturer.

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

The design, manufacturing process, and specifications of this device are

subject to change without notice.

Derived mathematically from one or more of the following directly

measured parameters: f C , IL, 3 dB bandwidth, f C versus T C , and C O .

Turnover temperature, T O , is the temperature of maximum (or turnover)

frequency, f O . The nominal frequency at any case temperature, T C , may be

calculated from: f = f O [1 - FTC (T O -T C ) 2 ]. Typically, oscillator T O is 20°C

less than the specified resonator T O .

This equivalent RLC model approximates resonator performance near the

resonant frequency and is provided for reference only. The capacitance C O

is the static (nonmotional) capacitance between pin1 and pin 2 measured

at low frequency (10 MHz) with a capacitance meter. The measurement

includes case parasitic capacitance with a floating case. For usual

grounded case applications (with ground connected to either pin 1 or pin 2

and to the case), add approximately 0.25 pF to C O .

www.RFM.com E-mail: info@rfm.com

?2008 by RF Monolithics, Inc.

Page 1 of 2

RO3118 - 3/27/08

发布紧急采购，3分钟左右您将得到回复。

采购需求

(若只采购一条型号，填写一行即可)

*型号	*数量	厂商	批号	封装

添加更多采购

采购需求

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

我的联系方式