Reference Information - Epson RX8010SJ Applications Manual

10. Reference information

10.1. 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]
RX8010SJ
ETM37E-07
-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.
10. Reference information
−6 / C
2
-6
is an error of
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