X9118

Dual Supply/Low Power/1024-Tap/2-Wire Bus Single Digitally-Controlled (XDCP™) Potentiometer

Product Status: Mass Production

OVERVIEW

The X9118 is a single digitally controlled potentiometer (XDCP) on a monolithic CMOS integrated circuit.

The digital controlled potentiometer is implemented using 1023 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 2-wire bus interface. The potentiometer has associated with it a volatile Wiper Counter Register (WCR) and a four non-volatile Data Registers 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 though the switches. Power-up recalls the contents of the default data register (DR0) to the WCR.

The XDCP can be used as a three-terminal potentiometer or as a two terminal variable resistors in a wide variety of applications including control, parameter adjustments, and signal processing.

KEY FEATURES

  • 1024 resistor taps – 10-bit resolution
  • 2-wire serial interface for write, read and transfer operations of the potentiometer
  • Wiper resistance, 40Ω typical @ 5V
  • Four non-volatile data registers for each potentiometer
  • Non-volatile storage of multiple wiper positions
  • Power on recall: Loads saved wiper position on power-up
  • Standby current < 15µA Max
  • System VCC: 2.7V to 5.5V operation
  • Analog V+/V-: -5V to +5V
  • 100kΩ end-to-end resistance
  • Endurance: 100,000 data changes per bit per register
  • 100 years data retention
  • 14 Ld TSSOP
  • Low power CMOS
  • Pb-free (RoHS compliant)

BLOCK DIAGRAM

 Block Diagram

PARAMETRICS

Parameters
X9118
Basic Information
Production Status
Mass Production
# of Devices/ Channels
1
# of Taps
1024
Memory Type
Nonvolatile
Bus/Output Interface
2-Wire
Resistance Options (kΩ)
100
Supply Voltage Vcc (Min) (V)
2.7
Supply Voltage Vcc (Max) (V)
5.5
Supply Current Icc
3 µA
Resistance Taper
Linear
VL Min. Terminal Voltage
-5.5 V
VL Max. Terminal Voltage
5.5 V
Wiper Current (mA)
3
Wiper Resistance (Ω)
40
Dual Supply Range (V)
-2.7 to -5.5, +2.7 to +5.5
Max Operating Temperature
85 °C
End-to-End Temperature Coefficient (ppm/øC)
300
Middlepoint Ratiometric Tempco
20
Qualification Level
Standard
Supply Voltage Vcc Range (V)
2.7 to 5.5
Can Sample
YES
Temperature Range
-40 to +85

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