ISL23418

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

Product Status: 量産中(*)

OVERVIEW

The ISL23418 is a volatile, low voltage, low noise, low power, SPI™ 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 wiper is controlled by the user through the SPI 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 ISL23418 wiper always commences at
mid-scale (64-tap position).

The low voltage, low power consumption, and small package size of the ISL23418 make it an ideal choice for use in battery operated equipment. The ISL23418 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 ISL23418 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
  • SPI Serial Interface
  • No Additional Level Translator for Low Bus Supply
  • Daisy Chaining of Multiple DCP
  • Wiper Resistance: 70Ω Typical @ VCC = 3.3V
  • Shutdown Mode: Forces DCP into End-to-end Open Circuit; RW Shorted to RL Internally
  • Power-on Preset to Mid-scale (64-tap Position)
  • Shutdown and Standby Current <2.8µA Max
  • Power Supply
  • VCC = 1.7V to 5.5V Analog Power Supply
  • VLOGIC = 1.2V to 5.5V SPI Bus/Logic Power Supply
  • 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)

PARAMETRICS

Parameters
ISL23418
Basic Information
Production Status
量産中(*)
チャネル当たりのデバイス数
1
タップ数
128
メモリタイプ
Volatile
バス/出力インタフェース
SPI
抵抗オプション (kΩ)
10, 50, 100
電源電圧Vcc (V) (min)
1.7
電源電圧Vcc (V) (max)
5.5
電源電流Icc
100 µA
抵抗変化特性
Linear
VL端子電圧 (min)
0 V
VL端子電圧 (max)
5.5 V
ワイパ電流 (mA)
3
ワイパ抵抗 (Ω)
70
二電源範囲 (V)
N/A
最大動作温度
125 °C
エンドツーエンド温度係数 (ppm/øC)
175, 85, 70
中間点レシオメトリック温度係数
8, 4, 2.3
特長
VLOGIC 1.2V to 5.5V; Daisy Chainable to minimize # I/0 pins on microcontroller
認定レベル
Standard
単一電源範囲 (V)
0 to 5.5
電源電圧Vcc範囲 (V)
1.7 to 5.5
CANサンプル
YES
温度範囲
-40 to +125

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