ISL23328

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

Product Status: 量産中

OVERVIEW

The ISL23328 is a volatile, low voltage, low noise, low power, 128-Tap, dual digitally controlled potentiometer (DCP) with an I2 C Bus™ interface. It integrates two DCP cores, wiper switches and control logic on a monolithic CMOS integrated circuit.

Each 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. Each potentiometer has an associated volatile Wiper Register (WRi, i = 0, 1) that can be directly written to and read by the user. The contents of the WRi controls the position of the wiper. When powered on, the wiper of each DCP will always commence at mid-scale (64 tap position).

The low voltage, low power consumption, and small package of the ISL23328 make it an ideal choice for use in battery operated equipment. In addition, the ISL23328 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 ISL23328 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

  • Two potentiometers per package
  • 128 resistor taps
  • 10kΩ, 50kΩ or 100kΩ total resistance
  • I2C serial interface
  • No additional level translator for low bus supply
  • Three address pins allow up to eight 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
  • Maximum supply current without serial bus activity (standby)
  • 3µA @ VCC and VLOGIC = 5V
  • 1.7µA @ VCC and VLOGIC = 1.7V
  • Shutdown Mode
  • Forces the DCP into an end-to-end open circuit and RWi is connected to RLi internally
  • Reduces power consumption by disconnecting the DCP resistor from the circuit
  • Wiper resistance: 70Ω typical @ VCC = 3.3V
  • Power-on preset to mid-scale (64 tap position)
  • Extended industrial temperature range: -40°C to +125°C
  • 14 Ld TSSOP or 16 Ld UTQFN packages
  • Pb-free (RoHS Compliant)

PARAMETRICS

Parameters
ISL23328
Basic Information
Production Status
量産中
チャネル当たりのデバイス数
2
タップ数
128
メモリタイプ
Volatile
バス/出力インタフェース
I2C
抵抗オプション (kΩ)
10, 100
電源電圧Vcc (V) (min)
1.7
電源電圧Vcc (V) (max)
5.5
電源電流Icc
3 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)
125, 65, 45
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; multiple device per bus
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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