DS1620 Datasheet, PDF (11/13 Pages) Dallas Semiconductor – Digital Thermometer and Thermostat

DS1620
DC ELECTRICAL CHARACTERISTICS (-55°C to +125°C; V_DD=2.7V to 5.5V)
PARAMETER
SYMBOL CONDITION MIN MAX UNITS NOTES
Thermometer Error
T_ERR
0°C to +70°C
-55°C to +0°C
±½
°C
10, 11
and 70°C to
See Typical Curve
125°C
Logic 0 Output
V_OL
0.4
V
3
Logic 1 Output
V_OH
2.4
V
2
Input Resistance
R_I
RST to GND
1
MΩ
DQ, CLK to V_DD
1
MΩ
Active Supply Current
I_CC
0°C to +70°C
1
mA
4, 5
Standby Supply Current
I_STBY
0°C to +70°C
1
µA
4, 5
SINGLE CONVERT TIMING DIAGRAM (STAND-ALONE MODE)
CONV
t_CNV
AC ELECTRICAL CHARACTERISTICS (-55°C to +125°C; V_DD=2.7V to 5.5V)
PARAMETERS
SYMBOL MIN TYP MAX UNITS NOTES
Temperature Conversion Time
T_TC
400 1000
ms
Data to CLK Setup
t_DC
35
ns
6
CLK to Data Hold
t_CDH
40
ns
6
CLK to Data Delay
t_CDD
100
ns
6, 7, 8
CLK Low Time
t_CL
285
ns
6
CLK High Time
t_CH
285
ns
6
CLK Frequency
f_CLK
DC
1.75
MHz
6
CLK Rise and Fall
t_R, t_F
500
ns
RST to CLK Setup
t_CC
100
ns
6
CLK to RST Hold
t_CCH
40
ns
6
RST Inactive Time
t_CWH
125
ns
6, 9
CLK High to I/O High-Z
t_CDZ
50
ns
6
RST Low to I/O High-Z
t_RDZ
50
ns
6
Convert Pulse Width
t_CNV
250 ns
500 ms
NV Write Cycle Time
t_WR
10
50
ms
12
AC ELECTRICAL CHARACTERISTICS
PARAMETER
SYMBOL
Input Capacitance
C_I
I/O Capacitance
C_I/O
(-55°C to +125°C; V_DD=2.7V to 5.5V)
MIN TYP MAX UNITS NOTES
5
pF
10
pF
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