ISL22316

Low Noise, Low Power I2 C® Bus, 128 Taps

Product Status: Mass Production(*)

OVERVIEW

The ISL22316 integrates a single digitally controlled potentiometer (DCP) and non-volatile memory on a monolithic CMOS integrated circuit.

The digitally controlled potentiometer is 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. The 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 DCP's IVR to the WR.

The DCP 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.

KEY FEATURES

  • 128 resistor taps
  • I2C serial interface
  • Two address pins, up to four devices/bus
  • Non-volatile storage of wiper position
  • Wiper resistance: 70Ω typical @ 3.3V
  • Shutdown mode
  • Shutdown current 5µA max
  • Power supply: 2.7V to 5.5V
  • 50kΩ or 10kΩ total resistance
  • High reliability
  • Endurance: 1,000,000 data changes per bit per register
  • Register data retention: 50 years @ T≤55°C
  • 10 Ld MSOP or 10 Ld TDFN package
  • Pb-free (RoHS compliant)

BLOCK DIAGRAM

 Block Diagram

PARAMETRICS

Parameters
ISL22316
Basic Information
Production Status
Mass Production(*)
# of Devices/ Channels
1
# of Taps
128
Memory Type
Nonvolatile
Bus/Output Interface
I2C
Resistance Options (kΩ)
10
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
125 °C
End-to-End Temperature Coefficient (ppm/øC)
50
Middlepoint Ratiometric Tempco
4
Features
3 terminal DCP with shutdown feature
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 +125

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