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DS1721 Datasheet(PDF) 15 Page - Dallas Semiconductor

Part # DS1721
Description  2-Wire Digital Thermometer and Thermostat
PDF  16 Pages
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Manufacturer  DALLAS [Dallas Semiconductor]
Direct Link  https://www.maximintegrated.com/en.html
Logo DALLAS - Dallas Semiconductor

DS1721 Datasheet(HTML) 15 Page - Dallas Semiconductor

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DC ELECTRICAL CHARACTERISTICS:
DIGITAL THERMOMETER
(-55°C to +125°C; 2.7V
≤ V
DD
≤ 5.5V)
PARAMETER
SYMBOL
CONDITION
MIN
TYP
MAX
UNITS
NOTES
DS1721
Thermometer Error
TERR
-10°C to +85°C
±1.0
°C
5
Resolution
9
12
bits
9-bit
Conversions
125
150
10-bit
Conversions
250
300
11-bit
Conversions
500
600
Conversion Time
tCONVT
12-bit
Conversions
1000
1200
ms
AC ELECTRICAL CHARACTERISTICS:
2-WIRE INTERFACE
(-55°C to +125°C; VDD=2.7V to 5.5V)
PARAMETER
SYMBOL
CONDITION
MIN
TYP
MAX
UNITS
NOTES
SCL Clock
Frequency
fSCL
Fast Mode
Standard Mode
0
0
400
100
KHz
Bus Free Time
Between a STOP
and START
Condition
tBUF
Fast Mode
Standard Mode
1.3
4.7
µs
Hold Time
(Repeated) START
Condition
tHD:STA
Fast Mode
Standard Mode
0.6
4.0
µs
6
Low Period of
SCL Clock
tLOW
Fast Mode
Standard Mode
1.3
4.7
µs
High Period of
SCL Clock
tHIGH
Fast Mode
Standard Mode
0.6
4.0
µs
Setup Time for a
Repeated START
Condition
tSU:STA
Fast Mode
Standard Mode
0.6
4.7
µs
Data Hold Time
tHD:DAT
Fast Mode
Standard Mode
0
0
0.9
µs
7
Data Set-up Time
tSU:DAT
Fast Mode
Standard Mode
100
250
ns
8
Rise Time of both
SDA and SCL
Signals
tR
Fast Mode
Standard Mode
20+0.1
CB
300
1000
ns
8
Fall Time of both
SDA and SCL
Signals
tF
Fast Mode
Standard Mode
20+0.1
CB
300
1000
ns
9
Set-up time for
STOP Condition
tSU:STO
Fast Mode
Standard Mode
0.6
4.0
µs
Capacitive Load for
each Bus Line
Cb
400
pF
9
Input Capacitance
CI
5pF



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