| # of Devices/ Channels | 4 |
| # of Taps | 256 |
| Memory Type | Non-Volatile |
| Bus Interface Type | SPI |
| Resistance Options (kΩ) | 10, 50, 100 |
| VCC Range (V) | 2.25 to 5.5 |
| VCC (min) (V) | 2.25 |
| VCC (max) (V) | 5.5 |
| DCP Dual Supply Range (V) | -2.25 to -5.5 |
| DCP Single Supply Range (V) | |
| Resistance Taper | Linear |
| Wiper Current (mA) | 3 |
| Wiper Resistance (Ω) | 70 |
| Supply Current (μA) | 0.5 |
| Max Operating Temp (°C) | 125 |
| End-to-End Tempco (ppm/°C) | 45 |
| Middlepoint Ratiometric Tempco | 4 |
| VL min. terminal voltage (V) | -5.5 |
| VH max. terminal voltage (V) | 5.5 |
The ISL22444 integrates four digitally controlled potentiometers (DCP), control logic 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 wipers position is controlled by the user through the SPI serial interface. Each potentiometer has an associated volatile Wiper Register (WRi) and a non-volatile Initial Value Register (IVRi) that can be directly written to and read by the user. The contents of the WRi control the position of the wiper. At power-up the device recalls the contents of the DCP's IVRi to the corresponding WRi.
The ISL22444 also has 11 General Purpose non-volatile registers that can be used as storage of lookup table for multiple wiper position or any other valuable information. The ISL22444 features a dual supply that is beneficial for applications requiring a bipolar range for DCP terminals between V- and VCC.
Each DCP can be used as three-terminal potentiometer or as two-terminal variable resistor in a wide variety of applications including control, parameter adjustments, and signal processing.
| 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 $ |
| ISL22444TFR20Z | 量产 | Full-Range Ind | 20 Ld QFN | 2 | 3.91 |
| ISL22444TFR20Z-TK | 量产 | Full-Range Ind | 20 Ld QFN T +R | 2 | 3.91 |
| ISL22444TFV20Z | 量产 | Full-Range Ind | 20 Ld TSSOP | 1 | 3.91 |
| ISL22444TFV20Z-TK | 量产 | Full-Range Ind | 20 Ld TSSOP T+R | 1 | 3.91 |
| ISL22444UFR20Z | 量产 | Full-Range Ind | 20 Ld QFN | 2 | 3.91 |
| ISL22444UFR20Z-TK | 量产 | Full-Range Ind | 20 Ld QFN T +R | 2 | 3.91 |
| ISL22444UFV20Z | 量产 | Full-Range Ind | 20 Ld TSSOP | 1 | 3.91 |
| ISL22444UFV20Z-TK | 量产 | Full-Range Ind | 20 Ld TSSOP T+R | 1 | 3.91 |
| ISL22444WFR20Z | 量产 | Full-Range Ind | 20 Ld QFN | 2 | 3.91 |
| ISL22444WFR20Z-TK | 量产 | Full-Range Ind | 20 Ld QFN T +R | 2 | 3.91 |
| ISL22444WFV20Z | 量产 | Full-Range Ind | 20 Ld TSSOP | 1 | 3.91 |
| ISL22444WFV20Z-TK | 量产 | Full-Range Ind | 20 Ld TSSOP T+R | 1 | 3.91 |