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PDF X9319 Data sheet ( Hoja de datos )
| Número de pieza | X9319 | |
| Descripción | Digitally Controlled Potentiometer (XDCP) | |
| Fabricantes | Xicor | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de X9319 (archivo pdf) en la parte inferior de esta página. Total 10 Páginas | ||
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Digitally Controlled Potentiometer (XDCP™)
X9319
FEATURES
• Solid-state potentiometer
• 3-wire serial interface
• Terminal voltage, 0 to +10V
• 100 wiper tap points
—Wiper position stored in nonvolatile memory
and recalled on power-up
• 99 resistive elements
—Temperature compensated
—End to end resistance range ± 20%
• Low power CMOS
—VCC = 5V
—Active current, 3mA max.
—Standby current, 1mA max.
• High reliability
—Endurance, 100,000 data changes per bit
—Register data retention, 100 years
• RTOTAL value = 10KΩ and 50KΩ
• Packages
—8-lead SOIC and DIP
APPLICATIONS
• LCD bias control
• DC bias adjustment
• Gain and offset trim
• Laser diode bias control
• Voltage regulator output control
DESCRIPTION
The Xicor X9319 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 99 resistive elements and a wiper switch-
ing network. Between each element and at either end
are tap points accessible to the wiper terminal. 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 a subsequent power-up operation.
The device can be used as a three-terminal
potentiometer for voltage control or as a two-terminal
variable resistor for current control in a wide variety of
applications.
BLOCK DIAGRAM
VCC (Supply Voltage)
Up/Down
(U/D)
Increment
(INC)
Device Select
(CS)
Control
and
Memory
VSS (Ground)
General
XDCP is a trademark of Xicor, Inc.
REV 1.7 7/10/03
U/D
INC
CS
RH
RW
RL
VVCSSC
Up/Down
Counter
7-Bit
Nonvolatile
Memory
Store and
Recall
Control
Circuitry
99
98
97
One 96
of
One
Hundred
Decoder
2
1
0
Wiper
Switches
Resistor
Array
Detailed
RH
RL
RW
www.xicor.com
1 of 10
1 page  
X9319
A.C. OPERATING CHARACTERISTICS
(VCC = 5V ±10%, TA = Full Operating Temperature Range unless otherwise stated)
Limits
Symbol
Parameter
Min.
Typ.(4)
tCl
tlD(5)
tDI(5)
tlL
tlH
tlC
tCPHS
tCPHNS(5)
tIW(5)
tCYC
tR, tF(5)
tPU(5)
tR VCC(5)
CS to INC setup
INC HIGH to U/D change
U/D to INC setup
INC LOW period
INC HIGH period
INC inactive to CS inactive
CS deselect time (STORE)
CS deselect time (NO STORE)
INC to RW change
INC cycle time
INC input rise and fall time
Power up to wiper stable
VCC power-up rate
100
100
1
1
1
1
20
1
100
4
0.2
Max.
500
500
500
50
Unit
ns
ns
µs
µs
µs
µs
ms
µs
µs
µs
µs
µs
V/ms
POWER UP AND DOWN REQUIREMENTS
In order to prevent unwanted tap position changes, or an inadvertant store, bring the CS and INC high before or
concurrently with the VCC pin on powerup. The potentiometer voltages must be applied after this sequence is com-
pleted. During power-up, the data sheet parameters for the DCP do not fully apply until 1 millisecond after VCC
reaches its final value. The VCC ramp spec is always in effect.
A.C. TIMING
CS
tCI
INC
U/D
tIW
RW
tCYC
tIL
tIH
tID
tIC
tDI
MI (3)
tCPHS
90% 90%
10%
tCPHNS
tF tR
REV 1.7 7/10/03
www.xicor.com
5 of 10
5 Page | ||
| Páginas | Total 10 Páginas | |
| PDF Descargar | [ Datasheet X9319.PDF ] | |
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