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參數(shù)資料
| 型號： | ISL22449 |
| 廠商： | Intersil Corporation |
| 英文描述： | Low Noise, Low Power, SPI Bus, 128 Taps, Wiper Only(低噪聲,低功率，SPI總線, 128抽頭電位器) |
| 中文描述： | 低噪聲，低功耗，SPI總線，128抽頭，雨刷，只有（低噪聲，低功率和SPI總線，128抽頭電位器） |
| 文件頁數(shù)： | 5/12頁 |
| 文件大?。?/td> | 356K |
| 代理商： | ISL22449 |
5
FN6333.2
September 15, 2006
NOTES:
5. Typical values are for T
A
= +25°C and 3.3V supply voltage.
6. LSB: [V(R
W
)
127
– V(R
W
)
0
]
/
127. V(R
W
)
127
and V(R
W
)
0
are V(R
W
) for the DCP register set to 7F hex and 00 hex respectively. LSB is the
incremental voltage when changing from one tap to an adjacent tap.
7. ZS error = V(RW)
0
/
LSB.
8. FS error = [V(RW)
127
– V
CC
]
/
LSB.
9. DNL = [V(RW)
i
– V(RW)
i-1
]
/
LSB-1, for i = 1 to 127. i is the DCP register setting.
10. INL = [V(RW)
i
– i LSB – V(RW)]/LSB for i = 1 to 127
11. V
MATCH
= [V(RWx)
i
– V(RWy)
i
]
/
LSB, for i = 1 to 127, x = 0 to 3 and y = 0 to 3.
12.
for i = 16 to 112 decimal, T = -40°C to +125°C. Max( ) is the maximum value of the wiper
voltage and Min ( ) is the minimum value of the wiper voltage over the temperature range.
13. t
WC
is the time from the end of a Write sequence of SPI serial interface, to the end of the self-timed internal non-volatile write cycle.
14. R
pu
is specified for the highest data rate transfer for the device. Higher value pullup can be used at lower data rates.
15. This parameter is not 100% tested.
Hysteresis
SHDN, SCK, SDI, and CS input buffer
hysteresis
0.05*
V
CC
V
V
OL
SDO output buffer LOW voltage
I
OL
= 4mA
0
0.4
V
R
pu
(Note 14)
SDO pull-up resistor off-chip
Maximum is determined by t
RO
and t
FO
with
maximum bus load Cbus = 30pF, f
SCK
=
5MHz
2
k
Cpin
(Note 15)
SHDN, SCK, SDI, SDO and CS pin
capacitance
10
pF
f
SCK
SPI frequency
5
MHz
t
CYC
SPI clock cycle time
200
ns
t
WH
SPI clock high time
100
ns
t
WL
SPI clock low time
100
ns
t
LEAD
Lead time
250
ns
t
LAG
Lag time
250
ns
t
SU
SDI, SCK and CS input setup time
50
ns
t
H
SDI, SCK and CS input hold time
50
ns
t
RI
SDI, SCK and CS input rise time
10
ns
t
FI
SDI, SCK and CS input fall time
10
20
ns
t
DIS
SDO output Disable time
0
100
ns
t
V
SDO output valid time
350
ns
t
HO
SDO output hold time
0
ns
t
RO
SDO output rise time
R
pu
= 2k, Cbus = 30pF
60
ns
t
FO
SDO output fall time
R
pu
= 2k, Cbus = 30pF
60
ns
t
CS
CS deselect time
2
μs
t
WRT
Wiper Response Time after SPI write
to WR register
1.5
μs
Operating Specifications
Over the recommended operating conditions unless otherwise specified.
(Continued)
SYMBOL
PARAMETER
TEST CONDITIONS
MIN
TYP
(NOTE 5)
MAX
UNIT
TC
V
Max V RW
(
-----------------------------------------------–
)
)
)
Max V RW
)
i
Min V RW
)
i
+
[
]
2
6
165°C
----------------
×
=
ISL22449
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