參數(shù)資料
型號(hào): DS1720
英文描述: Econo . Digital Thermometer and Thermostat
文件頁(yè)數(shù): 11/12頁(yè)
文件大小: 77K
代理商: DS1720
DS1720
030598 11/12
AC ELECTRICAL CHARACTERISTICS
(–55
°
C to +125
°
C; V
DD
=2.7V to 5.5V)
MAX
UNITS
PARAMETER
SYMBOL
MIN
TYP
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
(–55
°
C to +125
°
C; V
DD
=2.7V to 5.5V)
MAX
UNITS
PARAMETER
SYMBOL
MIN
TYP
NOTES
Input Capacitance
C
I
5
pF
I/O Capacitance
C
I/O
10
pF
NOTES:
1. All voltages are referenced to ground.
2. Logic one voltages are specified at a source current of 1 mA.
3. Logic zero voltages are specified at a sink current of 4 mA.
4. I
CC
specified with DQ pin open and CLK pin at V
DD
.
5. I
CC
specified with V
CC
at 3.3V and RST=GND.
6. Measured at V
IH
= 2.0V or V
IL
= 0.6V.
7. Measured at V
OH
= 2.4V or V
OL
= 0.4V.
8. Load capacitance = 50 pF.
9. t
CWH
must be 10 ms minimum following any write command that involves the E
2
memory.
10.See typical curve for specification limits outside 0
°
C to 85
°
C range.
11. Thermometer error reflects temperature accuracy as tested during calibration.
12.Writing to the nonvolatile memory should only take place in the 0
°
C to 70
°
C temperature range.
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