ISL22446 四重数控电位器（数字电位器TM）

The ISL22446 integrates four digitally controlled potentiometers (DCP) and non-volatile memory on a monolithic CMOS integrated circuit.

The digitally controlled potentiometers are implemented with a combination of resistor elements and CMOS switches. The position of the wipers are controlled by the user through the SPI serial interface. Each potentiometer has an associated volatile Wiper Register (WR) and a non-volatile Initial Value Register (IVR) that can be directly written to and read by the user. The contents of the WR controls the position of the wiper. At power-up the device recalls the contents of the DCP’s IVR to the corresponding WR.

The DCPs can be used as three-terminal potentiometers or as two-terminal variable resistors in a wide variety of applications including control, parameter adjustments, and signal processing.

ISL22446 特性

• Four potentiometers in one package
• 128 resistor taps
• SPI serial interface
• Non-volatile storage of wiper position
• Wiper resistance: 70Ω typical @ VCC = 3.3V
• Shutdown mode
• Shutdown current 5μA max
• Power supply: 2.7V to 5.5V
• 50kΩ or 10kΩ total resistance
• High reliability
  • Endurance: 1,000,000 data changes per bit per register
  • Register data retention: 50 years @ T ≤ +55°C
• 20 Ld TSSOP and 20 Ld TQFN package
• Pb-free (RoHS compliant)

ISL22446 芯片订购指南

芯片型号	产品状态	温度范围	封装尺寸图	潮湿敏感度等级MSL	美元价格US $
ISL22446UFRT20Z	量产	Full-Range Ind	20 Ld TQFN	1	2.64
ISL22446UFRT20Z-TK	量产	Full-Range Ind	20 Ld TQFN T +R	1	2.64
ISL22446UFV20Z	量产	Full-Range Ind	20 Ld TSSOP	1	2.64
ISL22446UFV20Z-TK	量产	Full-Range Ind	20 Ld TSSOP T+R	1	2.64
ISL22446WFRT20Z	量产	Full-Range Ind	20 Ld TQFN	1	2.64
ISL22446WFRT20Z-TK	量产	Full-Range Ind	20 Ld TQFN T +R	1	2.64
ISL22446WFV20Z	量产	Full-Range Ind	20 Ld TSSOP	1	2.64
ISL22446WFV20Z-TK	量产	Full-Range Ind	20 Ld TSSOP T+R	1	2.64

ISL22446 应用技术支持与电子电路设计开发资源下载

1. ISL22446 数据资料 datatSheet 下载.PDF