ISL23318

Single, 128-taps Low Voltage Digitally Controlled Potentiometer (XDCP™)

Product Status: Mass Production(*)

OVERVIEW

The ISL23318 is a volatile, low voltage, low noise, low power, I2 C Bus™, 128 Taps, single digitally controlled potentiometer (DCP), which integrates DCP core, wiper switches and control logic 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) that can be directly written to and read by the user. The contents of the WR controls the position of the wiper. When powered on, the ISL23318s wiper will always commence at mid-scale (64 tap position).

The low voltage, low power consumption, and small package of the ISL23318 make it an ideal choice for use in battery operated equipment. In addition, the ISL23318 has a VLOGIC pin allowing down to 1.2V bus operation, independent from the VCC value. This allows for low logic levels to be connected directly to the ISL23318 without passing through a voltage level shifter.

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
  • No additional level translator for low bus supply
  • Two address pins allow up to four devices per bus
  • Power supply
  • VCC = 1.7V to 5.5V analog power supply
  • VLOGIC = 1.2V to 5.5V I2C bus/logic power supply
  • Wiper resistance: 70Ω typical @ VCC = 3.3V
  • Shutdown Mode - forces the DCP into an end-to-end open circuit and RW is shorted to RL internally
  • Power-on preset to mid-scale (64 tap position)
  • Shutdown and standby current <2.8µA max
  • DCP terminal voltage from 0V to VCC
  • 10kΩ, 50kΩ or 100kΩ total resistance
  • Extended industrial temperature range: -40°C to +125°C
  • 10 Ld MSOP or 10 Ld UTQFN packages
  • Pb-free (RoHS compliant)

BLOCK DIAGRAM

 Block Diagram

PARAMETRICS

Parameters
ISL23318
Basic Information
生产状态
Mass Production(*)
器件/通道数量
1
抽头数量
128
内存类型
Volatile
总线/输出接口
I2C
阻抗选项 (kΩ)
10, 50, 100
供电电压Vcc (最小值) (V)
1.7
供电电压Vcc (最大值) (V)
5.5
供电电流Icc
18 µA
阻抗变化特性
Linear
VL最小终端电压
0 V
VL最大终端电压
5.5 V
Wiper电流 (mA)
3
Wiper电阻 (Ω)
70
双电源范围 (V)
N/A
最高工作温度
125 °C
端到端温度系数 (ppm/øC)
175, 85, 70
中点比率温度系数
8, 4, 2.3
特性
VLOGIC 1.2V to 5.5V
资质级别
Standard
单电源范围 (V)
0 to 5.5
供电电压Vcc范围 (V)
1.7 to 5.5
CAN 采样
YES
温度范围
-40 to +125

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