rtc-4553ac Epson Electronics America, Inc., rtc-4553ac Datasheet - Page 25

• Manufacturer Part Number: rtc-4553ac
• Description: Real Time Clock Module
• Manufacturer: Epson Electronics America, Inc.

RTC – 4553AC
10. Reference Data
Note These data are reference values for the sample lot.
(1) Frequency/temperature characteristics
(2) Frequency/voltage characteristics example
-100
-150
-50
0
10
-50
+ 4
- 4
-6
+ 2
- 2
0
2
= -0.035
T
Temperature [°C]
0
= +25 °C Typ.
Supply Voltage V
3
Condition :
5 V as reference, Ta= +25 C
10
-6
4
50
Typ.
DD
[ V ]
5
100
6
Page - 22
[Calculating the frequency stability]
1. Frequency/temperature characteristics are approximated
2. To calculate the clock accuracy, add the frequency tolerance
3. Calculating the daily deviation
according to the following equation.
and voltage characteristics
Daily deviation =
* For example, at
about 1 second per day.
f
f/f =
T
(3) Current consumption/voltage characteristics
T
X
f
f/f
f/fo
f
f
=
T
T
V
example
(1 / °C
(°C)
(°C)
f/fo +
(
T
-
2
2
1
)
f
X
T
)
2
+
f/f ´ 86400 (seconds)
: Frequency tolerance at given
: Secondary temperature
: Peak temperature (+25°C ± 5°C)
: Given temperature
: Clock accuracy at given
: Frequency tolerance
: Frequency deviation at given
: Frequency deviation at given
(( 0.035±0.005)
temperature
coefficient
f
temperature and voltage
(frequency stability)
temperature
voltage
f/f = 11.574 ´ 10
V
2
Supply Voltage V
3
Condition :
Ta = +25 C , CS
4
DD
10
-6
, the deviation is
-6
[ V ]
/ °C
5
MQ - 342 - 01
2
1
)
= 0 V
6