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PDF X93154 Data sheet ( Hoja de datos )
| Número de pieza | X93154 | |
| Descripción | Low Noise Low Power 32 Taps | |
| Fabricantes | Intersil | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de X93154 (archivo pdf) en la parte inferior de esta página. Total 8 Páginas | ||
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Noise,
2014
Low
Power, 32 Taps
FN8180.4
Digitally Controlled Potentiometer
(XDCP™)
The Intersil X93154 is a digitally controlled potentiometer
(XDCP). The device consists of a resistor array, wiper
switches, a control section, and nonvolatile memory. The
wiper position is controlled by a 3-wire interface.
The potentiometer is implemented by a resistor array
composed of 31 resistive elements and a wiper switching
network. The position of the wiper element is controlled by
the CS, U/D, and INC inputs. The position of the wiper can
be stored in nonvolatile memory and then be recalled upon
during a subsequent power-up operation.
The device is connected as a two-terminal variable resistor
and can be used in a wide variety of applications including:
- Bias and Gain Control
- LCD Contrast Adjustment
Pinout
X93154
(8 LD MSOP)
TOP VIEW
INC 1
U/D 2
RH 3
VSS 4
8 VCC
7 CS
6 RL
5 NC*
*NC
and
can be
VCC
left
unconnected,
or
connected
to
any
voltage
between
VSS
Features
• Solid-State Potentiometer
• 3-Wire Serial Interface
• 32 Wiper Tap Points
- Wiper Position Stored in Nonvolatile Memory and
Recalled on Power-up
• 31 Resistive Elements
- Temperature Compensated
- Maximum Resistance Tolerance of ±30%
- Terminal Voltage, 0 to VCC
• Low Power CMOS
- VCC = 3V ±10%
- Active Current, 250µA max.
- Standby Current, 1µA max.
• High Reliability
- Endurance 200,000 Data Changes per Bit
- Register Data Retention, 100 years
• RTOTAL Value = 50kΩ
• Package
- 8 Ld MSOP
• Pb-free (RoHS Compliant)
1 CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-468-3774 | Copyright Intersil Americas LLC 2004, 2005, 2008, 2014. All Rights Reserved
Intersil (and design) and XDCP are trademarks owned by Intersil Corporation or one of its subsidiaries.
All other trademarks mentioned are the property of their respective owners.
1 page  
AC Timing
CS
tCI
INC
U/D
X93154
tCYC
tIL
tIH
tIC
tID tDI
(STORE)
tCPH
90% 90%
10%
tF tR
Power-Up and Power-Down Requirements
There are no restrictions on the power-up or power-down
conditions of VCC and the voltages applied to the
potentiometer pins provided that VCC is always more positive
than or equal to VH and VL, i.e., VCC VH,VL. The VCC ramp
rate specification is always in effect.
Pin Descriptions
RH and RL
The RH and RL pins of the X93154 are equivalent to the fixed
terminals of a mechanical potentiometer. The minimum voltage
is VSS and the maximum is VCC. The terminology of RH and
RL references the relative position of the terminal in relation to
wiper movement direction selected by the U/D input.
Up/Down (U/D)
The U/D input controls the direction of the wiper movement
and whether the counter is incremented or decremented.
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 Names
SYMBOL
RH
RL
VSS
VCC
U/D
INC
CS
DESCRIPTION
High terminal
Low terminal
Ground
Supply voltage
Up/Down control input
Increment control input
Chip Select control input
Principles of Operation
There are three sections of the X93154: the input control,
counter and decode section; the nonvolatile memory; 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 electronic 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 tIW (INC to VW change). The
2-terminal resistance value for the device can temporarily
change by a significant amount if the wiper is moved several
positions.
When the device is powered down, the last wiper position
stored will be maintained in the nonvolatile memory. When
power is restored, the contents of the memory are recalled and
the wiper is set to the value last stored.
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5
FN8180.4
July 18, 2014
5 Page | ||
| Páginas | Total 8 Páginas | |
| PDF Descargar | [ Datasheet X93154.PDF ] | |
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