Reference Information; Reference Data - Epson RX4111CE Applications Manual

11. Reference information

11.1. Reference Data

(1)Example of frequency and temperature characteristics
 = +25 C Typ.
T
 10
-6  = -0.035  10
0
-50
-100
-150
-50 0
Temperature [C]
Figure 18 Frequency vs Temperature characteristics
There is a tool on our web that makes it easy to calculate the time error due to temperature. Please come to this
RX4111CE
ETM62E-02
-6
Typ.
50 100
Seiko Epson Corporation
[Finding the frequency stability]
1.Frequency and temperature characteristics can be
approximated using the following equations.
f = ( 
2
)
T T X
f
: Frequency deviation in any temperature
T
 [1/C
2
] : Coefficient of secondary temperature
(0.0350.005)10
[C]

: Ultimate temperature(+255C)
T
[C]

: Any temperature
X
2.To determine overall clock accuracy, add the
frequency precision and voltage characteristics.
f/f=f/fo+f +f
T V
f/f
: Clock accuracy (stable frequency)
in any temperature and voltage.
f/fo
: Frequency precision
f
: Frequency deviation in any temperature.
T
f
: Frequency deviation in any voltage.
V
3.How to find the date difference
Date Difference = f/f  86400 (Sec)
 For example: f/f = 11.57410
approximately 1 second/day.
11. Reference information
6 /C
2
-6
is an error of
"Link"
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16
