X9315 Datasheet, PDF (1/13 Pages) Xicor Inc. – E 2 POT TM Nonvolatile Digital Potentiometer

APPLICATION NOTE
A V A I LABLE
AN104
Low Noise, Low Power, 32 Taps
X9315
E²POT^TM Nonvolatile Digital Potentiometer
FEATURES
• Low Power CMOS
—V_CC = 2.7V to 5.5V, Single Supply
—Active Current, 50µA (Increment) max
—Active Current, 400µA (Store) Max
—Standby Current, 1µA 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 = 1KΩ
• X9315W = 10KΩ
• Packages
—8-Lead SOIC
—8-Lead MSOP
—8-Pin DIP
FUNCTIONAL DIAGRAM
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.
U/D
5-BIT
INC
UP/DOWN
CS
COUNTER
CMOS SWITCH
VH
5-BIT
NONVOLATILE
MEMORY
STORE AND
RECALL
CONTROL
CIRCUITRY
ONE
OF
THIRTY-
TWO
WIPER
POSITION
DECODER
E²POT™ is a trademark of Xicor, Inc.
6732-2.0 5/30/97 T1/C0/D0 SH
1
RESISTOR
ARRAY
VL
VW
6732 FM1
Characteristics subject to change without notice