X9111

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

Product Status: Mass Production

OVERVIEW

The X9111 integrates 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 SPI bus interface. The potentiometer has associated with it a volatile Wiper Counter Register (WCR) and four nonvolatile Data Registers that can be directly written to and read by the user. The contents of the WCR control the position of the wiper on the resistor array through the switches. Power-up recalls the contents of the default data register (DR0) to the WCR.

The XDCP can be used as a 3-terminal potentiometer or as a 2-terminal variable resistor in a wide variety of applications including control, parameter adjustments, and signal processing.

KEY FEATURES

  • 1024 resistor taps – 10-bit resolution
  • SPI serial interface for write, read, and transfer operations of the potentiometer
  • Wiper resistance, 40Ω typical at 5V
  • Four nonvolatile Data Registers
  • Nonvolatile storage of multiple wiper positions
  • Power-on recall, loads saved wiper position on power-up
  • Standby current <3μA maximum
  • VCC: 2.7V to 5.5V operation
  • 100kΩ end-to-end resistance
  • 100-year data retention
  • Endurance: 100,000 data changes per bit per register
  • 14 Ld TSSOP
  • Low-power CMOS
  • Single supply version of the X9110
  • Pb-Free (RoHS compliant)

BLOCK DIAGRAM

 Block Diagram

PARAMETRICS

Parameters
X9111
Basic Information
Production Status
Mass Production
# of Devices/ Channels
1
# of Taps
1024
Memory Type
Nonvolatile
Bus/Output Interface
SPI
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
0 V
VL Max. Terminal Voltage
5.5 V
Wiper Current (mA)
3
Wiper Resistance (Ω)
40
Dual Supply Range (V)
N/A
Max Operating Temperature
85 °C
End-to-End Temperature Coefficient (ppm/øC)
300
Middlepoint Ratiometric Tempco
20
Qualification Level
Standard
Single Supply Range (V)
0 to 5.5
Supply Voltage Vcc Range (V)
2.7 to 5.5
Can Sample
YES
Temperature Range
-40 to +85

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