DS1721 データシートの表示（PDF） - Dallas Semiconductor -> Maxim Integrated
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DS1721 Datasheet PDF : 16 Pages
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DC ELECTRICAL CHARACTERISTICS:
DIGITAL THERMOMETER
PARAMETER
SYMBOL CONDITION
DS1721
Thermometer Error
TERR
-10°C to +85°C
Resolution
9-bit
Conversions
10-bit
Conversion Time
tCONVT
Conversions
11-bit
Conversions
12-bit
Conversions
DS1721
(-55°C to +125°C; 2.7V ≤ VDD ≤ 5.5V)
MIN TYP MAX UNITS NOTES
±1.0
°C
5
9
12
bits
125 150
250 300
ms
500 600
1000 1200
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
0
Standard Mode
0
400
100
KHz
Bus Free Time
Between a STOP
and START
tBUF
Fast Mode
1.3
Standard Mode 4.7
µs
Condition
Hold Time
(Repeated) START
Condition
tHD:STA
Fast Mode
0.6
Standard Mode 4.0
µs
6
Low Period of
SCL Clock
tLOW
Fast Mode
1.3
Standard Mode 4.7
µs
High Period of
SCL Clock
tHIGH
Fast Mode
0.6
Standard Mode 4.0
µs
Setup Time for a
Repeated START
Condition
tSU:STA
Fast Mode
0.6
Standard Mode 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
100
Standard Mode 250
ns
8
Rise Time of both
SDA and SCL
Signals
tR
Fast Mode 20+0.1
Standard Mode CB
300
1000
ns
8
Fall Time of both
SDA and SCL
Signals
tF
Fast Mode 20+0.1
Standard Mode CB
300
1000
ns
9
Set-up time for
STOP Condition
tSU:STO
Fast Mode
0.6
Standard Mode 4.0
µs
Capacitive Load for
each Bus Line
Cb
400
pF
9
Input Capacitance
CI
5
pF
15 of 16
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