DS3234 데이터 시트보기 (PDF) - Maxim Integrated
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DS3234 Datasheet PDF : 21 Pages
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DS3234
Extremely Accurate SPI Bus RTC
with Integrated Crystal and SRAM
Typical Operating Characteristics
(VCC = +3.3V, TA = +25°C, unless otherwise noted.)
STANDBY SUPPLY CURRENT
vs. SUPPLY VOLTAGE
150
RST ACTIVE
125
INPUTS = GND
100
75
50
25
0
2.3 2.8 3.3 3.8 4.3 4.8 5.3
VCC (V)
BATTERY CURRENT
vs. SUPPLY VOLTAGE
2600
VCC = 0V
2350 BB32kHz = 0
BBSQW = 1
2100
1850
1600
1350
1100
850
BBSQW = 0
600
2.3
2.8
3.3
SUPPLY VOLTAGE (VBAT)
FREQUENCY DEVIATION
vs. TEMPERATURE vs. AGING VALUE
65
55
AGING = -128
45
35
AGING = -33
25
AGING = 0
15
5
-5
-15
-25
AGING = 127
-35
AGING = 32
-45
-40 -20 0
20 40 60 80
TEMPERATURE (°C)
500
450
400
350
300
250
200
0
BATTERY CURRENT
vs. TEMPERATURE
850
VCC = 0V
BB32kHz = 0
800 BBSQW = 0
VBAT = 3.4V
750
VBAT = 3.0V
700
650
600
3.8
-40 -20 0 20 40 60 80
TEMPERATURE (°C)
ICCA vs. DOUT LOAD
SCLK = 4MHz
10
20
30
40
CAPACITANCE (pF)
DELTA TIME AND FREQUENCY
vs. TEMPERATURE
20
DS3234 toc06
0
0
-20 CRYSTAL
-40 +20ppm
-20
-60
TYPICAL CRYSTAL,
UNCOMPENSATED
-80
-40
-100
-120
CRYSTAL
-20ppm
-140
DS3234
ACCURACY
-60
BAND
-160
-80
-180
-200
-100
-40 -30 -20 -10 0 10 20 30 40 50 60 70 80
TEMPERATURE (°C)
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