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Digital Potentiometers (POTs) | CAT5251
概览
CAT5251 是与控制逻辑和 16 字节的 NVRAM 内存集成的四个数字 POT。每个数字 POT 由一系列电阻元件组成，这些电阻元件联接在两个外部可访问的端点之间。每个电阻元件之间的抽头点通过 CMOS 开关连接到弧刷输出。一个单独的 8 位控制寄存器 (WCR) 独立控制每个数字 POT 的弧刷抽头开关。与每个弧刷控制寄存器相关联的是四个 8 位非易失性内存数据寄存器 (DR)，用于存储最多四个弧刷设置。通过 SPI 串行总线写入弧刷控制寄存器或任何非易失性数据寄存器。加电时，四个电位计中的每个电位计的第一个数据寄存器 (DR0) 的内容会自动加载到其各自的抽头控制寄存器中。CAT5251 可用作电位计或两端可变电阻器。它适用于各种应用中的电路电平或系统电平调整。它可以在 -40°C 到 85°C 的工业运行温度范围内使用。
应用
- Audio Equipment
- Industrial Controls
终端产品
- Automobiles
- Industrial Equipment
特性
- Four linear-taper digital potentiometers
- 256 resistor taps per potentiometer
- End to end resistance 50 kΩ or 100 kΩ
- Potentiometer control and memory access via SPI interface
- Low wiper resistance, typically 100 Ω
- Nonvolatile memory storage for up to four wiper settings for each potentiometer
- Automatic recall of saved wiper settings at power up
- 2.5 to 6.0 volt operation
- Standby current less than 1 µA
- 1,000,000 nonvolatile WRITE cycles
- 100 year nonvolatile memory data retention
- Industrial temperature range
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