參數(shù)資料
型號(hào): DS2890X
元件分類(lèi): 數(shù)字電位計(jì)
英文描述: 1-Wire Digital Potentiometer
中文描述: 1 - Wire數(shù)字電位器
文件頁(yè)數(shù): 19/27頁(yè)
文件大?。?/td> 939K
代理商: DS2890X
DS2890
19 of 27
b) Write-zero Time Slot
15μs
(OD: 2μs)
RESISTOR
MASTER
DS2890
Sampling Window
60μs
t
LOW0
(OD: 6μs)
REGULAR SPEED
60 μs
t
LOW0
< t
SLOT
< 120 μs
1 μs
t
REC
<
OVERDRIVE SPEED
6 μs
t
LOW0
< t
SLOT
< 16 μs
1 μs
t
REC
<
V
PULLUP
V
PULLUP MIN
V
IH MIN
V
IL MAX
0V
t
SLOT
t
REC
c) Read-data Time Slot
RESISTOR
MASTER
DS2890
Master
Sampling Window
REGULAR SPEED
60 μs
t
SLOT
< 120 μs
1 μs
t
LOWR
< 15 μs
0
t
RELEASE
< 45 μs
1 μs
t
REC
<
t
RDV
= 15 μs
t
SU
< 1 μs
OVERDRIVE SPEED
6 μs
t
SLOT
< 16 μs
1 μs
t
LOWR
< 2 μs
0
t
RELEASE
< 4 μs
1 μs
t
REC
<
t
RDV
= 2 μs
t
SU
< 1 μs
V
PULLUP
V
PULLUP MIN
V
IH MIN
V
IL MAX
0V
t
SLOT
t
REC
t
LOWR
t
SU
t
RDV
t
RELEASE
*The optimal sampling point for the master is as close as possible to the end time of the t
RDV
period
without exceeding t
RDV
. For the case of a Read-one time slot, this maximizes the amount of time for the
pull-up resistor to recover the line to a high level. For a Read-zero time slot it ensures that a read will
occur before the fastest 1-Wire device(s) release the line (t
RELEASE
= 0).
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