Digitally-Controlled Potentiometer. X9015 Datasheet

X9015 Datasheet PDF, Equivalent


Part Number

X9015

Description

Digitally-Controlled Potentiometer

Manufacture

Xicor

Total Page 11 Pages
PDF Download
Download X9015 Datasheet


X9015 Datasheet
Low Noise, Low Power
X9015
Digitally-Controlled Potentiometer
FEATURES
• 32 Taps
• Three-wire Up/Down Serial Interface
• VCC = 2.7V & 5V
• Operating ICC = 50µA Max.
• Standby current = 1µA Max.
• RTOTAL = 50K
• Packages, SOIC-8
DESCRIPTION
The Xicor X9015 is a 32 tap potentiometer that is volatile.
The device consists of a string of 31 resistors that can be
programmed to connect the RW/VW wiper output with
any of the nodes between the connecting resistors. The
connection point of the wiper is determined by
information communicated to the device on the 3-wire
port. The 3-wire port changes the tap position by a falling
edge on the increment pin. Direction the wiper moves is
determined by the state of the Up/Down pin. The wiper
position at power up is tap #15.
The X9015 can be used in a wide variety of applications
that require a digitally controlled variable resistor to set
analog values.
FUNCTIONAL DIAGRAMS
VCC (Supply Voltage)
UP/DOWN
(U/D)
INCREMENT
(INC)
DEVICE SELECT
(CS)
CONTROL
VSS (Ground)
GENERAL
RH/VH
RW/VW
RL/VL
U/D
INC
CS
VCC
VSS
5-BIT
UP/DOWN
COUNTER
CONTROL
CIRCUITRY
31
30
29
28
ONE
OF
THIRTY TWO
DECODER
2
1
0
TRANSFER
GATES
RESISTOR
ARRAY
DETAILED
RH/VH
RL/VL
RW/VW
9900-2009.3 9/20/99 PS
1 Characteristics subject to change without notice

X9015 Datasheet
X9015
PIN DESCRIPTIONS
RH/VH and RL/VL
The high (RH/VH) and low (RL/VL) terminals of the
X9015 are equivalent to the fixed terminals of a
mechanical potentiometer. The minimum voltage is VSS
and the maximum is VCC. The terminology of RL/VL and
RH/VH references the relative position of the terminal in
relation to wiper movement direction selected by the
U/D input and not the voltage potential on the terminal.
RW/VW
RW/Vw 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. The wiper terminal series resistance is
typically 200at VCC = 5V. At power up the wiper
position is at tap #15 (VL/RL = tap #0).
Up/Down (U/D)
The U/D input controls the direction of the wiper
movement and whether the tap postion 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. When
CS is returned HIGH while the INC input is LOW the
X9015 will be placed in the low power standby mode until
the device is selected once again.
PIN CONFIGURATION
INC
U/D
RH/VH
VSS
SOIC
18
27
X9015
36
45
VCC
CS
RL/VL
RW/VW
PIN NAMES
Symbol
RH/VH
RW/VW
RL/VL
VSS
VCC
U/D
INC
CS
Description
High Terminal
Wiper Terminal
Low Terminal
Ground
Supply Voltage
Up/Down Control Input
Increment Control Input
Chip Select Control Input
2


Features Datasheet pdf Low Noise, Low Power X9015 Digitally-Con trolled Potentiometer FEATURES • 32 Taps • Three-wire Up/Down Serial Inte rface • VCC = 2.7V & 5V • Operating ICC = 50µA Max. • Standby current = 1µA Max. • RTOTAL = 50KΩ • Pack ages, SOIC-8 DESCRIPTION The Xicor X90 15 is a 32 tap potentiometer that is vo latile. The device consists of a string of 31 resistors that can be programmed to connect the RW/VW wiper output with any of the nodes between the connectin g resistors. The connection point of th e wiper is determined by information co mmunicated to the device on the 3-wire port. The 3-wire port changes the tap p osition by a falling edge on the increm ent pin. Direction the wiper moves is d etermined by the state of the Up/Down p in. The wiper position at power up is t ap #15. The X9015 can be used in a wide variety of applications that require a digitally controlled variable resistor to set analog values. FUNCTIONAL DIAG RAMS VCC (Supply Voltage) UP/DOWN (U/D) INCREMENT (INC) DEVICE SELECT (CS) CON.
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