A
PPLICATION
N
OTE
A V A I L A B L E
AN104
Low Noise, Low Power, 32 Taps
X9315
E
2
POT
TM
Nonvolatile Digital Potentiometer
FEATURES
• Low Power CMOS
—V
CC
= 2.7V to 5.5V, Single Supply
—Active Current, 50
µ
A (Increment) max
—Active Current, 400
µ
A (Store) Max
—Standby Current, 1
µ
A Max
• Low Noise
• 31 Resistive Elements
—Temperature Compensated
—± 20% End to End Resistance Range
—V
SS
to V
CC
Range
• 32 Wiper Tap Points
—Wiper Positioned via Three-Wire Interface
—Similar to TTL Up/Down Counter
—Wiper Position Stored in Nonvolatile Memory
and Recalled on Power-Up
• 100 Year Wiper Position Data Retention
• X9315Z = 1K
Ω
• X9315W = 10K
Ω
• Packages
—8-Lead SOIC
—8-Lead MSOP
—8-Pin DIP
FUNCTIONAL DIAGRAM
U/D
INC
CS
5-BIT
UP/DO
WN
COUNTER
CMOS SWITCH
VH
DESCRIPTION
The Xicor X9315 is a solid state "micropower" nonvol-
atile potentiometer and is ideal for digitally controlled
resistance trimming.
The X9315 is a resistor array composed of 31 resistive
elements. Between each element and at either end are
tap points accessible to the wiper element. The posi-
tion 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 sub-
sequent power-up operation.
The resolution of the X9315 is equal to the maximum
resistance value divided by 31. As an example, for the
X9315W (10KΩ) each tap point represents 323Ω.
All Xicor nonvolatile digital potentiometers are de-
signed and tested for applications requiring extended
endurance and data retention.
5-BIT
NONVOLA
TILE
MEMOR
Y
ONE
OF
THIRTY
-
TWO
WIPER
POSITION
DECODER
RESISTOR
ARRAY
STORE AND
RECALL
CONTR
OL
CIRCUITR
Y
VL
VW
6732 FM1
E
2
POT™ is a trademark of Xicor, Inc.
6732-2.0 5/30/97 T1/C0/D0 SH
1
Characteristics subject to change without notice
XICOR [ XICOR INC. ]
