DS1821
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ABSOLUTE MAXIMUM RATINGS*
Voltage on any pin relative to ground
–0.5V to +7.0V
Operating temperature
–55
°
C to +125
°
C
Storage temperature
–55
°
C to +125
°
C
Soldering temperature
See-JTD-020A Specification
*These are stress ratings only and functional operation of the device at these or any other conditions
above those indicated in the operation sections of this specification is not implied. Exposure to absolute
maximum rating conditions for extended periods of time may affect reliability.
DC ELECTRICAL CHARACTERISTICS
(-55°C to +125°C; V
DD
=2.7V to 5.5V)
PARAMETER SYMBOL
CONDITION
MIN
TYP
MAX
UNITS NOTES
Supply Voltage
V
DD
+2.7
+5.5
1
t
ERR
0°C to +85°C
V
DD
= 3.6V to 5.5V
±1
°C 2,3,4
Thermometer
Error
-55°C to +125°C
V
DD
= 3.6V to 5.5V
See Typical Curve (Figure 11)
DQ Logic Low
V
IL
-0.3
+0.8
V
1,5
DQ Logic High
V
IH
+2
The lower of
+5.5
or
V
DD
+ 0.3
V 1,6
Sink Current
I
L
V
DQ
= 0.4V
V
DD
= 3.6V to 5.5V
4
mA 1
Standby Current
I
Q
-55°C to +85°C
1
3
μ
A
7
Active Current
I
DD
V
DD
= 5V
500
1000
μ
A
8
DQ Input
Current
I
DQ
5
µA
9
NOTES:
1.
All voltages are referenced to ground.
2.
Thermometer error reflects the sensor accuracy as tested during calibration.
3.
See typical performance curve in Figure 11 for specification limits outside the 0
°
C to +85
°
C range.
4.
For T<0
°
C, accuracy degrades by 0.5
°
C/V for V
DD
<4.3V.
5.
Logic low voltages are specified at a sink current of 4 mA.
6.
Logic high voltages are specified at a source current of 1 mA.
7.
Standby current is typically 5
μ
A at 125
°
C.
8.
Active current refers to supply current during active temperature conversions or EEPROM writes.
9.
DQ line is high (“hi-Z” state).
