參數(shù)資料
型號(hào): ISL23711UIU10Z
廠商: INTERSIL CORP
元件分類: 數(shù)字電位計(jì)
英文描述: Terminal Voltage +-3V or +-5V, 128 Taps IC Serial Interface
中文描述: 50K DIGITAL POTENTIOMETER, 2-WIRE SERIAL CONTROL INTERFACE, 128 POSITIONS, PDSO10
封裝: ROHS COMPLIANT, PLASTIC, MO-187BA, MSOP-10
文件頁數(shù): 6/9頁
文件大?。?/td> 270K
代理商: ISL23711UIU10Z
6
FN6127.0
August 16, 2005
NOTES:
1. Typical values are for T
A
= 25°C and
±
5V supply voltage.
2. LSB: [V(RW)
127
– V(RW)
0
]
/
127. V(RW)
127
and V(RW)
0
are V(RW) 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.
3. ZS error = (V(RW)
0
– V-)
/
LSB.
4. FS error = [V(RW)
127
– V
CC
]
/
LSB.
5. DNL = [V(RW)
i
– V(RW)
i-1
]
/
LSB-1, for i = 1 to 127. i is the DCP register setting.
6. INL = V(RW)
i
– (i LSB – V(RW)
0
) for i = 1 to 127.
Max V RW
)
Min V RW
Max V RW
)
i
Min V RW
7.
for i = 16 to 120 decimal, Max( ) is the maximum value of the wiper voltage and Min ( ) is the minimum value of the wiper voltage over the
temperature range.
8. MI =
|
R
127
– R
0
|
/
127. R
127
and R
0
are the measured resistances for the DCP register set to 7F hex and 00 hex respectively.
9. Roffset = R
0
/
MI, when measuring between R
W
and R
L
.
Roffset = R
127
/
MI, when measuring between R
W
and R
H
.
10. RDNL = (R
i
– R
i-1
)
/
MI, for i = 16 to 127.
11. RINL = [R
i
– (MI i) – R
0
]
/
MI, for i = 16 to 127.
]
Max Ri
)
Min Ri
)
+
[
]
2
125°C
12.
for i = 16 to 127, Max( ) is the maximum value of the resistance and Min ( ) is the minimum value of the resistance over the temperature range.
13. This parameter is not 100% tested.
14. These are I
2
C specific parameters and are not directly tested, however they are used during device testing to validate device specification.
Test Circuit
Equivalent Circuit
Pin Descriptions
Potentiometer Pins
R
H
AND R
L
The high (R
H
) and low (R
L
) terminals of the ISL23711 are
equivalent to the fixed terminals of a mechanical
potentiometer. The terminology of R
L
and R
H
references the
relative position of the terminal in relation to wiper movement
direction selected by the I
2
C serial input and not the voltage
potential on the terminal.
R
W
R
w
is the wiper terminal and is equivalent to the movable
terminal of a mechanical potentiometer. The position of the
wiper within the array is determined by the control inputs.
BUS INTERFACE PINS
Serial Data Input/Output (SDA)
The SDA is a bidirectional serial data input/output pin for the
I
2
C interface. It receives device address, operation code,
wiper register address and data from an I
2
C external master
device at the rising edge of the serial clock SCL, and it shifts
out data after each falling edge of the serial clock SCL.
SDA requires an external pull-up resistor, since it’s an open
drain output.
Serial Clock (SCL)
This input is the serial clock of the I
2
C serial interface.
Device Address (A1-A0)
The Address inputs are used to set the least significant 2 bits
of the 7-bit I
2
C interface slave address. A match in the slave
address serial data stream must be made with the Address
input pins in order to initiate communication with the
ISL23711. A maximum of 4 ISL23711 devices may occupy
the I
2
C serial bus.
Principles of Operation
The ISL23711 is an integrated circuit incorporating one DCP
with It’s associated register, and an I
2
C serial interface
providing direct communication between a host and the
potentiometer and memory. The resistor array is comprised
TC
V
)
)
)
i
+
[
]
2
---------------------------------------------–
125°C
----------------
×
=
TC
R
------------------------------–
6
----------------
×
=
FORCE
CURRENT
TEST POINT
R
W
C
H
C
L
R
W
R
TOTAL
C
W
R
H
R
L
ISL23711
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