ISL22511

Low Noise, Low Power, 32 Taps, Up/Down, Single Push-Button Controlled Potentiometer (XDCP™)

Product Status: Mass Production

OVERVIEW

The ISL22511 is a three-terminal digitally-controlled potentiometer (XDCP) implemented by a resistor array composed of 31 resistive elements and a wiper switching network. The ISL22511 features a push-button control, a Shutdown mode, and an industry-leading UTQFN package.

The push-button control has individual PU and PD inputs for adjusting the wiper. To eliminate redundancy, the wiper position automatically increments or decrements if one of these inputs is held longer than one second.

Forcing both PU and PD low for more than two seconds activates shutdown mode. Shutdown mode disconnects the top of the resistor chain and moves the wiper to the lowest position to minimize power consumption.

The three terminals accessing the resistor chain naturally configure the ISL22511 as a voltage divider. A rheostat is easily formed by floating an end terminal or connecting it to the wiper.

KEY FEATURES

  • Solid-state non-volatile potentiometer
  • Push button controlled
  • Single or auto increment/decrement
    • Fast mode after 1s button press
  • AUTOSTORE of last wiper position or manual store of wiper position
  • Shutdown mode
  • 32 wiper tap points
    • Max scale wiper position on power-up
  • Low power CMOS
    • VCC = 2.7V to 5.5V
    • Terminal voltage, 0V to VCC
    • Standby current, 3µA max
  • RTOTAL value = 10kΩ
  • High reliability
    • Endurance: 1000000 data changes per bit per register
    • Register data retention: 50 years at T ≤ +55°C
  • 10 Ld UTQFN (2.1mmx1.6mm) package
  • Pb-free (RoHS compliant)
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    APPLICATIONS

  • Volume control
  • LED/LCD brightness control
  • Contrast control
  • Programming bias voltages
  • Ladder networks

BLOCK DIAGRAM

 Block Diagram

PARAMETRICS

Parameters
ISL22511
Basic Information
Production Status
Mass Production
# of Devices/ Channels
1
# of Taps
32
Memory Type
Nonvolatile
Bus/Output Interface
Pushbutton
Resistance Options (kΩ)
10
Supply Voltage Vcc (Min) (V)
2.7
Supply Voltage Vcc (Max) (V)
5.5
Supply Current Icc
0.6 µA
Resistance Taper
Linear
VL Min. Terminal Voltage
0 V
VL Max. Terminal Voltage
5.5 V
Wiper Current (mA)
3
Wiper Resistance (Ω)
130
Dual Supply Range (V)
N/A
Max Operating Temperature
125 °C
End-to-End Temperature Coefficient (ppm/øC)
80
Middlepoint Ratiometric Tempco
25
Features
EEPROM autostore mode and shutdown mode
Qualification Level
Standard
Single Supply Range (V)
0 to 5.5
Supply Voltage Vcc Range (V)
2.7 to 5.5
Temperature Range
-40 to +125

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