X9317_14 Datasheet, PDF (1/13 Pages) Intersil Corporation – Low Noise, Low Power, 100 Taps, Digitally Controlled Potentiometer

DATASHEET
Low Noise, Low Power, 100 Taps, Digitally Controlled
Potentiometer (XDCP™)
X9317
The Intersil X9317 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 up/down interface
• 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 = 2.7V to 5.5V, and 5V ±10%
- Standby current <5µA
• High reliability
- Endurance, 100,000 data changes per bit
- Register data retention, 100 years
• R_TOTAL values = 10kΩ, 50kΩ, 100kΩ
• Packages
- 8 Ld SOIC, TSSOP, and MSOP
• Pb-free (RoHS compliant)
V_CC (SUPPLY VOLTAGE)
UP/DOWN
(U/D)
INCREMENT
(INC)
DEVICE SELECT
(CS)
CONTROL
AND
MEMORY
V_SS (GROUND)
GENERAL
U/D
INC
UP/DOWN
COUNTER
99
R_H
CS
98
R_H
R_W
R_L
V_CC
V_SS
7-BIT
NONVOLATILE
MEMORY
STORE AND
RECALL
CONTROL
CIRCUITRY
97
ONE ⁹⁶
OF
ONE
HUNDRED
DECODER
2
WIPER
RESISTOR
SWITCHES
ARRAY
1
0
R_L
R_W
DETAILED
FIGURE 1. BLOCK DIAGRAM
November 4, 2014
FN8183.9
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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