ISL90728

Single Volatile 128-Tap Digitally Controlled Potentiometer (XDCP™)

Product Status: Mass Production

OVERVIEW

The Intersil ISL90727 and ISL90728 are digitally controlled potentiometers (XDCP™). Each device consists of a resistor array, wiper switches, and a control section. The wiper position is controlled by an I2 C Bus™.

The potentiometer is implemented by a resistor array composed of 127 resistive elements and a wiper switching network. Between each element and at either end are tap points accessible to the wiper terminal. The position of the wiper element is controlled by the SDA and SCL inputs.

KEY FEATURES

  • Volatile Solid-State Potentiometer
  • I2C Serial Bus Interface
  • DCP Terminal Voltage, 2.7V to 5.5V
  • Low Tempco
  • Rheostat - 45 ppm/°C Typical
  • Divider - 15 ppm/°C Typical
  • 128 Wiper Tap Points
  • Wiper Resistance 70Ω Typ at VCC = 3.3V
  • Low Power CMOS
  • Active Current, 200µA Max
  • Standby Current, 500nA Max
  • Available RTOTAL Values = 50kΩ, 10kΩ
  • Power-on Preset to Midscale
  • Packaging
  • 6 Ld SC-70
  • Pb-Free (RoHS Compliant)

BLOCK DIAGRAM

 Block Diagram

PARAMETRICS

Parameters
ISL90728
Basic Information
Production Status
Mass Production
# of Devices/ Channels
1
# of Taps
128
Memory Type
Volatile
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
0.5 µA
Resistance Taper
Linear
VL Min. Terminal Voltage
0 V
VL Max. Terminal Voltage
5.5 V
Wiper Current (mA)
3
Wiper Resistance (Ω)
85
Dual Supply Range (V)
N/A
Max Operating Temperature
85 °C
End-to-End Temperature Coefficient (ppm/øC)
45
Middlepoint Ratiometric Tempco
15
Features
Same as ISL90727 with different I2C address; RL connected to GND
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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