Tel : +44 118 979 1238
Fax : +44 118 979 1283
Email: info@actcrystals.com
5-2.Electronic Characteristics
Characteristic
Centre Frequency
(Centre frequency between 3dB points)
Insertion Loss
3dB Bandwidth
at f
C
-21.4MHz (Image)
Rejection
at f
C
-10.7MHz (LO)
Ultimate
Turnover Temperature
Temperature
Turnover Frequency
Frequency Temperature Coefficient
Frequency Aging Absolute Value during the First Year
T
O
f
O
FTC
|
fA|
f
C
IL
BW
3
40
20
--
25
f
C
0.032
10
--
Minimum
Typical
303.875
3.0
600
50
30
60
4.5
800
--
--
--
55
°C
MHz
ppm/°C
2
Maximum
Unit
MHz
dB
kHz
dB
ppm/yr
i
CAUTION: Electrostatic Sensitive Device. Observe precautions for handling
!
1.
2.
The frequency f
C
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 50Ω test system with VSWR≤1.2:1. The test fixture L and C are adjusted for minimum
insertion loss at the filter centre frequency, f
C
. 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 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 in subsequent years.
Turnover temperature, T
0
, is the temperature of maximum (or turnover) frequency, f
0
. The nominal frequency
2
at any case temperature, T
C
, may be calculated from: f = f
0
[1 - FTC (T
0
- T
C
) ].
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.
3.
4.
5.
6.
7.
8.
In keeping with our ongoing policy of product evolvement and improvement, the above specification is subject to change without notice.
ISO9001: 2000 Registered - Registration number 6830/2
For quotations or further information please contact us at:
3 The Business Centre, Molly Millars Lane, Wokingham, Berks, RG41 2EY, UK
Issue : 1 C1
Date : SEPT 04
ACT [ ADVANCED CRYSTAL TECHNOLOGY ]
