ISL22317 Intersil Corporation, ISL22317 Datasheet - Page 6

• Manufacturer Part Number: ISL22317
• Description: Precision Single Digitally Controlled Potentiometer
• Manufacturer: Intersil Corporation

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Operating Specifications
NOTES:
10.
12. R
13. R
14. R
15.
16. Limits should be considered typical and are not production tested.
17. In rheostat mode, if a current is injected into the RW terminal, the magnitude of the current should be such that the developed potential difference
18. t
19. Parameters with MIN and/or MAX limits are 100% tested at +25°C, unless otherwise specified. Temperature limits established by
11. MI =
SDA vs SCL Timing
4. Typical values are for T
5. LSB: [V(R
6. ZS
7. FS
8. DNL = [V(RW)
9. INL = [V(RW)
SYMBOL
(Note 16)
(Note 16)
(Note 16)
t
t
incremental voltage when changing from one tap to an adjacent tap.
00 hex respectively.
between RW and RL terminals is at least 300mV, even at the minimum wiper setting. This ensures that the recommended operating condition
of V(RW) ≥ V(RL) + 0.3V is satisfied and the part operates in its most accurate resistance. Minimum and Maximum wiper setting can be
calculated as follow, MIN code = (0.3V*127)/(Iw*Rtotal), Max code = [(V
write cycle.
characterization and are not production tested.
TC
TC
SU:A
HD:A
WC
Rpu
(OUTPUT TIMING)
Cb
OFFSET
DNL
INL
t
(INPUT TIMING)
F
ERROR
error
V
R
is the time from a valid STOP condition at the end of a Write sequence of I
|
= [RW
RW
=
=
= (RW
= [V(RW)
--------------------------------------------------------------------------------------------- -
[
--------------------------------------------------------------- -
[
Max V RW
127
Max Ri
W
= RW
[
SDA and SCL Fall Time
Capacitive Loading of SDA or SCL
SDA and SCL Bus Pull-up Resistor
Off-chip
A1 Setup Time
A1 Hold Time
= V(RW)
Max V RW
Max Ri
i
)
SDA
SCL
127
i
– (MI • i) – RW
i
– RW
SDA
– RW
(
i
(
– i • LSB – V(RW)
– V(RW)
(
0
(
– V(R
(
t
127
/
SU:STA
MI, when measuring between RW and RL.
)
(
0
+
) Min Ri
i-1
0
|
/
–
/
Min Ri
LSB.
– V
127. MI is a minimum increment. RW
)
)
W
/
PARAMETER
i
MI -1, for i = 1 to 127.
)
A
)
i-1
i
)
CC
+
) Min V RW
0
= +25°C and 3.3V supply voltage.
(
–
]
Min V RW
]
(
/
/
127. V(R
]
LSB-1, for i = 1 to 127, where i is the DCP register setting.
0
/
LSB.
)
]
/
6
] 2 ⁄
MI, for i = 1 to 127.
)
(
]
Over the recommended operating conditions unless otherwise specified. (Continued)
(
t
0
HD:STA
(
×
]/LSB for i = 1 to 127
+
(
---------------- -
165°C
W
10
)
)
127
i
)
6
t
)
F
i
] 2 ⁄
)
and V(R
for i = 15 to 127, T = -40°C to +125°C. Max( ) is the maximum value of the resistance and Min ( ) is
the minimum value of the resistance over the temperature range.
t
SU:DAT
×
+
---------------- -
165°C
10
From 70% to 30% of V
Total on-chip and off-chip
Maximum is determined by t
For Cb = 400pF, max is about 2kΩ ~ 2.5kΩ
For Cb = 40pF, max is about 15kΩ ~ 20kΩ
Before START condition
After STOP condition
6
W
)
0
for i = 15 to 127 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.
are V(R
t
HIGH
127
ISL22317
TEST CONDITIONS
and RW
W
) for the DCP register set to 7F hex and 00 hex respectively. LSB is the
t
LOW
0
CC
are the measured resistances for the DCP register set to 7F hex and
t
CC
HD:DAT
- 0.3V)*127]/(I
2
C serial interface, to the end of the self-timed internal non-volatile
R
and t
F
t
R
W
*R
t
AA
TOTAL
(Note 19)
0.1*Cb
t
20 +
MIN
600
600
DH
).
10
1
t
sp
(Note 4)
TYP
t
BUF
(Note 19)
MAX
t
250
400
SU:STO
May 26, 2009
UNIT
FN6912.0
kΩ
ns
pF
ns
ns