X95820

Dual Digital Controlled Potentiometers (XDCP™); Low Noise/Low Power/2-Wire Bus/256 Taps

Product Status: Mass Production

OVERVIEW

The X95820 integrates two digitally controlled potentiometers (XDCP) on a monolithic CMOS integrated circuit.

The digitally controlled potentiometers are implemented with a combination of resistor elements and CMOS switches. The position of the wipers are controlled by the user through the I2 C bus interface. Each potentiometer has an associated volatile Wiper Register (WR) and a non-volatile Initial Value Register (IVR), that can be directly written to and read by the user. The contents of the WR controls the position of the wiper. At power up the device recalls the contents of the two DCP's IVR to the corresponding WRs.

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

KEY FEATURES

  • Two potentiometers in one package
  • 256 resistor taps-0.4% resolution
  • I2C serial interface
  • Three address pins, up to eight devices/bus
  • Wiper resistance: 70Ω typical @ 3.3V
  • Non-volatile storage of wiper position
  • Standby current <5µA max
  • Power supply: 2.7V to 5.5V
  • 50kΩ, 10kΩ total resistance
  • High reliability
  • Endurance: 150,000 data changes per bit per register
  • Register data retention: 50 years @ T ≤75°C
  • 14 Ld TSSOP
  • Pb-free plus anneal available (RoHS compliant)

BLOCK DIAGRAM

 Block Diagram

PARAMETRICS

Parameters
X95820
Basic Information
Production Status
Mass Production
# of Devices/ Channels
2
# of Taps
256
Memory Type
Nonvolatile
Bus/Output Interface
I2C
Resistance Options (kΩ)
10, 50
Supply Voltage Vcc (Min) (V)
2.7
Supply Voltage Vcc (Max) (V)
5.5
Supply Current Icc
5 µA
Resistance Taper
Linear
VL Min. Terminal Voltage
0 V
VL Max. Terminal Voltage
5.5 V
Wiper Current (mA)
3
Wiper Resistance (Ω)
70
Dual Supply Range (V)
N/A
Max Operating Temperature
85 °C
End-to-End Temperature Coefficient (ppm/øC)
45
Middlepoint Ratiometric Tempco
4
Features
Dual version of ISL95810
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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