鈥?Wiper resistance, 40鈩?typical at 5V.
鈥?Power-on recall. Loads saved wiper position on
power-up.
鈥?/div>
: -5V to +5V
鈥?10k鈩? 2.5k鈩?End to end resistance
鈥?100 yr. data retention
鈥?Endurance: 100,000 data changes per bit per
register
鈥?Low power CMOS
鈥?24-lead SOIC and 24-lead TSSOP
DESCRIPTION
The X9400 integrates four digitally controlled
potentiometers (XDCPs) on a monolithic CMOS
integrated circuit.
The digitally controlled potentiometer is implemented
using 63 resistive elements in a series array. Between
each element are tap points connected to the wiper
terminal through switches. The position of the wiper on
the array is controlled by the user through the SPI
serial bus interface. Each potentiometer has
associated with it a volatile Wiper Counter Register
(WCR) and four nonvolatile Data Registers (DR0-3)
that can be directly written to and read by the user.
The contents of the WCR controls the position of the
wiper on the resistor array through the switches.
Power-up recalls the contents of DR0 to the WCR.
The XDCP can be used as a three-terminal
potentiometer or as a two-terminal variable resistor in
a wide variety of applications including control,
parameter adjustments, and signal processing.
BLOCK DIAGRAM
V
CC
V
SS
V+
V-
HOLD
CS
SCK
SO
SI
A0
A1
WP
Interface
and
Control
Circuitry
Data
R0 R1
Wiper
Counter
Register
(WCR)
Resistor
Array
Pot 1
R0 R1
Pot 0
Wiper
Counter
Register
(WCR)
V
H0
/R
H0
R0 R1
Wiper
Counter
Register
(WCR)
V
H2
/R
H2
R2 R3
V
L0
/R
L0
V
W0
/R
W0
R2 R3
Resistor
Array
Pot 2
V
L2
/R
L2
V
W2
/R
W2
8
V
W1
/R
W1
V
H1
/R
H1
R0 R1
Wiper
Counter
Register
(WCR)
V
W3
/R
W3
V
H3
/R
H3
R2 R3
V
L1
/R
L1
R2 R3
Resistor
Array
Pot 3
V
L3
/R
L3
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-352-6832
|
Intersil (and design) is a registered trademark of Intersil Americas Inc.
XDCP is a trademark of Intersil Americas Inc. Copyright Intersil Americas Inc. 2005. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.