ACTF318 datasheet(3/3 Pages) ACT

3 / 3 page

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In keeping with our ongoing policy of product evolvement and improvement, the above specification is subject to change without notice.

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3 OF3

Reference temperature:

TA= 25 °C

Terminating source impedance:

ZS= 50 Ω and matching network

Terminating load impedance:

ZL= 50 Ω and matching network

Characteristic

Minimum

Typical

Maximum

Units

Centre Frequency

(Centre frequency between 3dB points)

318.000

MHz

Insertion Loss

3.5

5.0

3dB Pass band

BW3

±300

kHz

Passband Ripple

±1.0

at fC -21.4MHz (Image)

at fC -10.7MHz (LO)

Rejection

Ultimate

Turnover Temperature

Turnover Frequency

MHz

Temperature

Frequency Temperature Coefficient

FTC

0.03

ppm/

°C2

Frequency Aging

Absolute Value during the First Year

|fA|

ppm/yr

CAUTION: Electrostatic Sensitive Device. Observe precautions for handling

The frequency fC is defined as the midpoint between the 3dB frequencies.

Unless noted otherwise, all measurements are made with the filter installed in the specified test fixture that is

connected to a 50 Ω test system with VSWR≤1.2:1. The test fixture L and C are adjusted for minimum

insertion loss at the filter centre frequency, fC. Note that insertion loss, bandwidth, and passband shape are

dependent on the impedance matching component values and quality.

Unless noted otherwise, specifications apply over the entire specified operating temperature range.

Frequency aging is the change in fC 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 in subsequent years.

Turnover temperature, T0, is the temperature of maximum (or turnover) frequency, f0. The nominal frequency

at any case temperature, TC, may be calculated from: f = f0 [1 - FTC (T0 - TC)

2].

The specifications of this device are based on the test circuit shown above and subject to change or

obsolescence without notice.

All equipment designs utilizing this product must be approved by the appropriate government agency prior to

manufacture or sale.

Our liability is only assumed for the Surface Acoustic Wave (SAW) component(s) per se, not for applications,

processes and circuits implemented within components or assemblies.

Issue : 1 C1

Date : SEPT 04

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