Datasheet

DS3232M
±5ppm, I
2
C Real-Time Clock with SRAM
7Maxim Integrated
Typical Operating Characteristics (continued)
(T
A
= +25°C, unless otherwise noted.)
1Hz FREQUENCY ERROR
(MEASURED EVERY SECOND)
DS3232M toc07
TIME (SECONDS)
FREQUENCY ERROR (ppm)
-8
-6
-4
-2
0
2
4
6
8
10
-10
03
0252015105
V
CC
= 3.3V,
T
A
= +25°C
1Hz FREQUENCY ERROR
(MEASURED EVERY SECOND)
DS3232M toc08
TIME (MINUTES)
FREQUENCY ERROR (ppm)
-8
-6
-4
-2
0
2
4
6
8
10
-10
03
0252015105
V
CC
= 3.3V,
T
A
= +25°C
1Hz FREQUENCY ERROR
(DELTA FROM T0)
DS3232M toc09
TIME (MINUTES)
FREQUENCY ERROR (ppm)
03
0252015105
V
CC
= 3.3V,
T
A
= +25°C
-4
-3
-2
-1
0
1
2
3
4
5
-5
1Hz FREQUENCY ERROR
(10s THERMAL UPDATES
MEASURED EVERY SECOND)
DS3232M toc10
TIME (SECONDS)
FREQUENCY ERROR (ppm)
-8
-6
-4
-2
0
2
4
6
8
10
-10
03
0252015105
V
BAT
= 3.3V,
V
CC
= 0V,
T
A
= +25°C
1Hz FREQUENCY ERROR
(1s THERMAL UPDATES
MEASURED EVERY SECOND)
DS3232M toc11
TIME (SECONDS)
FREQUENCY ERROR (ppm)
-8
-6
-4
-2
0
2
4
6
8
10
-10
03
0252015105
V
BAT
= 3.3V,
V
CC
= 0V,
T
A
= +25°C
TIMEKEEPING ACCURACY
vs. TEMPERATURE
DS3232M toc12
TEMPERATURE (°C)
FREQUENCY EROR (ppm)
806040200-20
-150
-100
-50
0
50
-200
-40
TYPICAL 20ppm
CRYSTAL,
UNCOMPENSATED
DS3232M ACCURACY