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Teilenummer | X9314 |
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Beschreibung | E2POT Nonvolatile Digital Potentiometer | |
Hersteller | Xicor | |
Logo | ||
Gesamt 10 Seiten APPLICATION NOTES
AVA I L A B L E
AN42 • AN44–50 • AN52 • AN53 • AN71 • AN73
TXe9r3m14inal Voltage ±5V, 32 Taps, Log Taper
X9314
E2POT™ Nonvolatile Digital Potentiometer
FEATURES
• Low Power CMOS
—VCC = 3V to 5.5V
—Active Current, 3mA Max
—Standby Current, 500µA Max
• 31 Resistive Elements
—Temperature Compensated
—±20% End to End Resistance Range
— –5V to +5V 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
• X9314W = 10KΩ
• Packages
—8-Lead MSOP
—8-Lead PDIP
—8-Lead SOIC
DESCRIPTION
The Xicor X9314 is a solid state nonvolatile potentiom-
eter and is ideal for digitally controlled resistance trim-
ming.
The X9314 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 position of
the wiper element is controlled by the CS, U/D, and INC
inputs. The position of the wiper can be stored in nonvola-
tile memory and then be recalled upon a subsequent
power-up operation.
All Xicor nonvolatile Digitally Controlled Potentiometers
are designed and tested for applications requiring ex-
tended endurance and data retention.
FUNCTIONAL DIAGRAM
U/D 5-BIT
INC UP/DOWN
CS COUNTER
5-BIT
NONVOLATILE
MEMORY
VCC
GND
STORE AND
RECALL
CONTROL
CIRCUITRY
E2POT™ is a trademark of Xicor, Inc.
©Xicor, Inc. 1994, 1995, 1996 Patents Pending
6427-1.7 6/12/96 T3/C1/D8 NS
31
30
29
ONE 28
OF
THIRTY-
TWO
DECODER
2
1
0
VH
TRANSFER
GATES
RESISTOR
ARRAY
VL
VW
6427 FHD F01
1 Characteristics subject to change without notice
X9314
A.C. CONDITIONS OF TEST
MODE SELECTION
Input Pulse Levels
Input Rise and Fall Times
Input Reference Levels
0V to 3V
10ns
1.5V
6427 PGM T05.1
CS INC U/D
Mode
L H Wiper Up
L L Wiper Down
H X Store Wiper Position
H X X Standby
L X No Store, Return to
Standby
6427 PGM T06
A.C. OPERATING CHARACTERISTICS (Over recommended operating conditions unless otherwise specified)
Limits
Symbol
tCl
tlD
tDI
tlL
tlH
tlC
tCPH
tIW
tCYC
tR, tF(7)
tPU(7)
tR VCC
A.C. Timing
Parameter
CS to INC Setup
INC HIGH to U/D Change
U/D to INC Setup
INC LOW Period
INC HIGH Period
INC Inactive to CS Inactive
CS Deselect Time
INC to Vw Change
INC Cycle Time
INC Input Rise and Fall Time
Power up to Wiper Stable
VCC Power-up Rate
Min.
100
100
2.9
1
1
1
20
4
0.2
Typ.(6)
100
Max.
500
500
500
50
Units
ns
ns
µs
µs
µs
µs
ms
µs
µs
µs
µs
mV/µs
6427 PGM T07.3
CS
tCI
INC
tCYC
tIL tIH
tIC
tID tDI
tCPH
90% 90%
10%
tF tR
U/D
tIW
VW
MI (8)
6427 FHD F03
Notes: (6) Typical values are for TA = 25°C and nominal supply voltage.
(7) This parameter is periodically sampled and not 100% tested.
(8) MI in the A.C. timing diagram refers to the minimum incremental change in the VW output due to a change in the wiper position.
6
6 Page | ||
Seiten | Gesamt 10 Seiten | |
PDF Download | [ X9314 Schematic.PDF ] |
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