X9319_14 Datasheet, PDF (1/8 Pages) Intersil Corporation – Digitally Controlled Potentiometer

Data Sheet
July 31, 2014
X9319
FN8185.3
Digitally Controlled Potentiometer
(XDCP™)
The Intersil 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 switching
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.
Applications
• LCD bias control
• DC bias adjustment
• Gain and offset trim
• Laser diode bias control
• Voltage regulator output control
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
- V_CC = 5V
- Active current, 3mA max.
- Standby current, 1mA max.
• High reliability
- Endurance, 100,000 data changes per bit
- Register data retention, 100 years
• R_TOTAL value = 10kΩ
• Package
- 8 Ld SOIC
• Pb-free (RoHS compliant)
Block Diagram
V_CC (SUPPLY VOLTAGE)
U/D
INC
CS
UP/DOWN
COUNTER
99
98
R_H
UP/DOWN
(U/D)
INCREMENT
(INC)
DEVICE SELECT
(CS)
CONTROL
AND
MEMORY
V_SS (GROUND)
GENERAL
R_H
97
7-BIT
96
NONVOLATILE
ONE OF
R_W
MEMORY
ONE
HUNDRED
DECODER
WIPER
RESISTOR
SWITCHES
ARRAY
R_L
2
STORE AND
RECALL
1
V_CC
CONTROL
V_SS
CIRCUITRY
0
R_L
R_W
DETAILED
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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Intersil (and design) and XDCP are trademarks owned by Intersil Corporation or one of its subsidiaries.
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