參數資料
型號: ISL90841
廠商: Intersil Corporation
英文描述: Low Noise, Low Power I2C Bus, 256 Taps
中文描述: 低噪聲,低功耗I2C總線,256絲錐
文件頁數: 6/12頁
文件大?。?/td> 1126K
代理商: ISL90841
6
FN8094.0
August 1, 2005
NOTES:
1. Typical values are for T
A
= 25°C and 3.3V supply voltage.
2. LSB: [V(R
W
)
255
– V(R
W
)
0
]
/
255. V(R
W
)
255
and V(R
W
)
0
are V(R
W
) for the DCP register set to FF hex and 00 hex respectively. LSB is the
incremental voltage when changing from one tap to an adjacent tap.
3. ZS error = V(R
W
)
0
/
LSB.
4. FS error = [V(R
W
)
255
– V
CC
]
/
LSB.
5. DNL = [V(R
W
)
i
– V(R
W
)
i-1
]
/
LSB-1, for i = 1 to 255. i is the DCP register setting.
6. INL = V(R
W
)
i
– i - LSB – V(R
W
) for i = 1 to 255.
7. V
MATCH
= [V(R
W
x)
i
– V(R
W
y)
i
]
/
LSB, for i = 0 to 255, x = 0 to 3 and y = 0 to 3.
Max V RW
)
Min V RW
Max V RW
)
i
Min V RW
8.
for i = 16 to 240 decimal, T = -40°C to 85°C. Max( ) is the maximum value of the wiper
voltage and Min ( ) is the minimum value of the wiper voltage over the temperature range.
9. MI =
|
R
255
– R
0
|
/
255. R
255
and R
0
are the measured resistances for the DCP register set to FF hex and 00 hex respectively.
10. Roffset = R
0
/
MI, when measuring between R
W
and GND.
Roffset = R
255
/
MI, when measuring between R
W
and R
H
.
11. RDNL = (R
i
– R
i-1
)
/
MI, for i = 32 to 255.
12. RINL = [R
i
– (MI i) – R
0
]
/
MI, for i = 32 to 255.
13. R
MATCH
= (R
i,x
– R
i,y
)
/
MI, for i = 0 to 255, x = 0 to 3 and y = 0 to 3.
6
125°C
14.
for i = 32 to 255, T = -40°C to 85°C. Max( ) is the maximum value of the resistance and Min ( ) is the
minimum value of the resistance over the temperature range.
15. This parameter is not 100% tested.
TC
V
)
)
)
i
+
[
]
2
-----------------------------------------------–
6
125°C
----------------
×
=
TC
R
Max Ri
+
Min Ri
]
)
)
[
]
2
------------------------------–
----------------
×
=
Typical Performance Curves
FIGURE 1. WIPER RESISTANCE vs TAP POSITION
[I(R
W
) = V
CC
/ R
TOTAL
] FOR 50k
(U)
FIGURE 2. STANDBY I
CC
vs V
CC
V
CC
=2.7, T=-40°C
V
CC
=2.7, T=+25°C
V
CC
=2.7, T=+85°C
V
CC
=5.5, T=+85°C
V
CC
=5.5, T=+25°C
V
CC
=5.5, T=-40°C
0
50
100
150
200
250
TAP POSITION (DECIMAL)
160
140
120
100
80
60
40
20
0
W
)
-40°C
+85°C
+25°C
2.7
3.2
3.7
4.2
4.7
5.2
V
CC
(V)
1.8
1.6
1.4
1.2
1
0.8
0.6
0.4
0
S
C
0.2
ISL90841
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