X9400 Datasheet: Quad Digitally Controlled Potentiometers (XDCP)





X9400 Quad Digitally Controlled Potentiometers (XDCP) Datasheet

Part Number X9400
Description Quad Digitally Controlled Potentiometers (XDCP)
Manufacture Xicor
Total Page 22 Pages
PDF Download Download X9400 Datasheet PDF

Features: APPLICATION NOTES A V A I L A B L E AN99 • AN115 • AN120 • AN124 • AN13 3 • AN134 • AN135 Low Noise/Low Po wer/SPI Bus X9400 Quad Digitally Contr olled Potentiometers (XDCP™) FEATURES • Four potentiometers per package 64 resistor taps • SPI serial inter face for write, read, and transfer oper ations of the potentiometer • Wiper r esistance, 40Ω typical at 5V. • Fou r non-volatile data registers for each potentiometer • Non-volatile storage of multiple wiper position • Power on recall. Loads saved wiper position on power up. • Standby current < 1µA ma x • System VCC: 2.7V to 5.5V operatio n • Analog V+/V–: -5V to +5V • 10 KΩ, 2.5KΩ End to end resistance • 100 yr. data retention • Endurance: 100,000 data changes per bit per regist er • Low power CMOS • 24-lead SOIC, 24-lead TSSOP, and 24-lead XBGA packag es DESCRIPTION The X9400 integrates fou r digitally controlled potentiometers ( XDCPs) on a monolithic CMOS integrated circuit. The digitally controlled potentiometer is implemented using 63 resis.

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APPLICATION NOTES
AVAILABLE
AN99 • AN115 • AN120 • AN124 • AN133 • AN134 • AN135
Low Noise/Low Power/SPI Bus
X9400
Quad Digitally Controlled Potentiometers (XDCP)
FEATURES
• Four potentiometers per package
• 64 resistor taps
• SPI serial interface for write, read, and transfer
operations of the potentiometer
• Wiper resistance, 40typical at 5V.
• Four non-volatile data registers for each
potentiometer
• Non-volatile storage of multiple wiper position
• Power on recall. Loads saved wiper position on
power up.
• Standby current < 1µA max
• System VCC: 2.7V to 5.5V operation
• Analog V+/V: -5V to +5V
• 10K, 2.5KEnd to end resistance
• 100 yr. data retention
• Endurance: 100,000 data changes per bit per
register
• Low power CMOS
• 24-lead SOIC, 24-lead TSSOP, and 24-lead XBGA
packages
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
VCC
VSS
V+
V-
HOLD
CS
SCK
SO
SI
A0
A1
WP
Interface
and
Control
Circuitry
8
Data
Pot 0
R0 R1
R2 R3
Wiper
Counter
Register
(WCR)
VH0/RH0
VL0/RL0
VW0/RW0
R0 R1
R2 R3
Wiper
Counter
Register
(WCR)
Resistor
Array
Pot 2
VH2/RH2
VL2/RL2
VW2/RW2
R0 R1
R2 R3
Wiper
Counter
Register
(WCR)
VW1/RW1
Resistor
Array
Pot 1
VH1/RH1
VL1/RL1
R0 R1
R2 R3
Wiper
Counter
Register
(WCR)
VW3/RW3
Resistor
Array
Pot 3
VH3/RH3
VL3/RL3
REV 1.1.4 10/11/02
www.xicor.com
Characteristics subject to change without notice. 1 of 22

                    
                    






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