DS1721U Datasheet, PDF (15/17 Pages) Maxim Integrated Products – 2-Wire Digital Thermometer and Thermostat

DC ELECTRICAL CHARACTERISTICS:
DIGITAL THERMOMETER
PARAMETER
SYMBOL CONDITION
-10°C to +85°C,
DS1721
Thermometer Error
T_ERR
3.0V≤V_DD≤5.5V
-10°C to +85°C,
2.7V≤V_DD<3.0V
-55°C to +125°C
Resolution
9-bit
Conversions
10-bit
Conversion Time
t_CONVT
Conversions
11-bit
Conversions
12-bit
Conversions
DS1721
(-55°C to +125°C; 2.7V £ V_DD £ 5.5V)
MIN TYP MAX UNITS NOTES
±1.0
°C
±1.5
°C
±2.0
°C
9
12
bits
93.75
187.5
ms
375
750
AC ELECTRICAL CHARACTERISTICS:
2-WIRE INTERFACE
PARAMETER
SYMBOL CONDITION
SCL Clock
Frequency
f_SCL
Fast Mode
Standard Mode
Bus Free Time
Between a STOP
and START
t_BUF
Fast Mode
Standard Mode
Condition
Hold Time
(Repeated) START
Condition
t_HD:STA
Fast Mode
Standard Mode
Low Period of
SCL Clock
t_LOW
Fast Mode
Standard Mode
High Period of
SCL Clock
t_HIGH
Fast Mode
Standard Mode
Setup Time for a
Repeated START
Condition
t_SU:STA
Fast Mode
Standard Mode
Data Hold Time
t_HD:DAT
Fast Mode
Standard Mode
Data Set-up Time
t_SU:DAT
Fast Mode
Standard Mode
Rise Time of both
SDA and SCL
Signals
t_R
Fast Mode
Standard Mode
Fall Time of both
SDA and SCL
Signals
t_F
Fast Mode
Standard Mode
Set-up time for
STOP Condition
t_SU:STO
Fast Mode
Standard Mode
(-55°C to +125°C; V_DD=2.7V to 5.5V)
MIN TYP MAX UNITS NOTES
0
0
400
100
KHz
1.3
4.7
µs
0.6
4.0
1.3
4.7
0.6
4.0
0.6
4.7
0
0
100
250
20+0.1
C_B
20+0.1
C_B
0.6
4.0
µs
5
µs
µs
µs
0.9
µs
6
ns
7
300
1000
ns
7
300
1000
ns
8
µs
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