Datasheet

Extremely Accurate I
2
C-Integrated
RTC/TCXO/Crystal
ELECTRICAL CHARACTERISTICS (continued)
(V
CC
= 2.3V to 5.5V, V
CC
= Active Supply (see Table 1), T
A
= T
MIN
to T
MAX
, unless otherwise noted.) (Typical values are at V
CC
=
3.3V, V
BAT
= 3.0V, and T
A
= +25°C, unless otherwise noted.) (Notes 2, 3)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Output Frequency f
OUT
V
CC
= 3.3V or V
BAT
= 3.3V 32.768 kHz
0°C to +40°C ±2
Frequency Stability vs.
Temperature (Commercial)
f/f
OUT
V
CC
= 3.3V or
V
BAT
= 3.3V,
aging offset = 00h
>40°C to +70°C ±3.5
ppm
-40°C to <0°C ±3.5
0°C to +40°C ±2
Frequency Stability vs.
Temperature (Industrial)
f/f
OUT
V
CC
= 3.3V or
V
BAT
= 3.3V,
aging offset = 00h
>40°C to +85°C ±3.5
ppm
Frequency Stability vs. Voltage f/V 1 ppm/V
-40°C 0.7
+25°C 0.1
+70°C 0.4
Trim Register Frequency
Sensitivity per LSB
f/LSB Specified at:
+85°C 0.8
ppm
Temperature Accuracy Temp V
CC
= 3.3V or V
BAT
= 3.3V -3 +3 °C
First year ±1.0
Crystal Aging f/f
O
After reflow,
not production tested
0–10 years ±5.0
ppm
ELECTRICAL CHARACTERISTICS
(V
CC
= 0V, V
BAT
= 2.3V to 5.5V, T
A
= T
MIN
to T
MAX
, unless otherwise noted.) (Note 2)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
V
BAT
= 3.63V 70
Active Battery Current I
BATA
EOSC = 0, BBSQW = 0,
SCL = 400kHz (Note 5)
V
BAT
= 5.5V 150
μA
V
BAT
= 3.63V 0.84 3.0
Timekeeping Battery Current I
BATT
EOSC = 0, BBSQW = 0,
EN32kHz = 1,
SCL = SDA = 0V or
SCL = SDA = V
BAT
(Note 5)
V
BAT
= 5.5V 1.0 3.5
μA
V
BAT
= 3.63V 575
Temperature Conversion Current I
BATTC
EOSC = 0, BBSQW = 0,
SCL = SDA = 0V or
SCL = SDA = V
BAT
V
BAT
= 5.5V 650
μA
Data-Retention Current I
BATTDR
EOSC = 1, SCL = SDA = 0V, +25°C 100 nA
DS3231
Maxim Integrated
3