參數(shù)資料
型號(hào): x93154
元件分類: 數(shù)字電位計(jì)
英文描述: Low Noise, Low Power, 32 Taps Digitally Controlled Potentiometer(低噪音,低電壓,32個(gè)抽頭,數(shù)字電位器)
中文描述: 低噪聲,低功耗,32絲錐數(shù)控電位器(低噪音,低電壓,32個(gè)抽頭,數(shù)字電位器)
文件頁數(shù): 6/12頁
文件大?。?/td> 115K
代理商: X93154
X93154
6 of 12
REV 1.3.13 6/19/03
www.xicor.com
PIN DESCRIPTIONS
R
H
and R
L
The R
H
and R
L
pins of the X93154 are equivalent to
the fixed terminals of a mechanical potentiometer. The
minimum voltage is V
SS
and the maximum is V
CC
. The
terminology of R
H
and R
L
references the relative posi-
tion of the terminal in relation to wiper movement direc-
tion selected by the U/D input.
Up/Down (U/D)
The U/D input controls the direction of the wiper move-
ment and whether the counter is incremented or decre-
mented.
Increment (INC)
The INC input is negative-edge triggered. Toggling INC
will move the wiper and either increment or decrement
the counter in the direction indicated by the logic level
on the U/D input.
Chip Select (CS)
The device is selected when the CS input is LOW. The
current counter value is stored in nonvolatile memory
when CS is returned HIGH while the INC input is also
HIGH. After the store operation is complete the
X93154 will be placed in the low power standby mode
until the device is selected once again.
PIN CONFIGURATION
PIN NAMES
PRINCIPLES OF OPERATION
There are three sections of the X93154: the input con-
trol, counter and decode section; the nonvolatile mem-
ory; and the resistor array. The input control section
operates just like an up/down counter. The output of
this counter is decoded to turn on a single electronic
switch connecting a point on the resistor array to the
wiper output. Under the proper conditions the contents
of the counter can be stored in nonvolatile memory and
retained for future use. The resistor array is comprised
of 31 individual resistors connected in series. At either
end of the array and between each resistor is an elec-
tronic switch that transfers the connection at that point
to the wiper.
The wiper, when at either fixed terminal, acts like its
mechanical equivalent and does not move beyond the
last position. That is, the counter does not wrap around
when clocked to either extreme.
If the wiper is moved several positions, multiple taps
are connected to the wiper for t
IW
(INC to V
W
change).
The 2-terminal resistance value for the device can tem-
porarily change by a significant amount if the wiper is
moved several positions.
When the device is powered-down, the last wiper posi-
tion stored will be maintained in the nonvolatile mem-
ory. When power is restored, the contents of the
memory are recalled and the wiper is set to the value
last stored.
V
CC
CS
R
L
/V
L
NC
*
INC
U/D
R
H
/V
H
V
SS
1
2
3
4
8
7
6
5
X93154
MSOP
*
NC = No Connect. Can be connected to any
voltage between V
SS
and V
CC
, or left unconnected.
Symbol
R
H
R
L
V
SS
V
CC
U/D
INC
CS
Description
High terminal
Low terminal
Ground
Supply voltage
Up/Down control input
Increment control input
Chip Select control input
相關(guān)PDF資料
PDF描述
X93156(中文) Digitally Controlled Potentiometer(數(shù)控電位器)
X93156 Digitally Controlled Potentiometer(數(shù)控電位器)
X9317 Low Noise, Low Power, 100 Taps Digitally-Controlled (XDCPTM) Potentiometer(數(shù)控電位器)
X9318(中文) Digitally Controlled Potentiometer (XDCP)(單DCP,抽頭位置掉電自動(dòng)保存,高輸出端電壓,可部分替代X9312W)
X9318 Digitally Controlled Potentiometer (XDCP)(單DCP,抽頭位置掉電自動(dòng)保存,高輸出端電壓,可部分替代X9312W)
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