器件名称 详细搜索
产品 AFE4410TI
描述

AFE4410 是一款用于心率监测 (HRM) 等 光学生物传感应用的模拟前端。该器件支持多达四个可切换发光二极管 (LED) 以及多达三个光电二极管 (PD)。光电二极管的电流通过互阻抗放大器 (TIA) 转换为电压,并使用模数转换器 (ADC) 进行数字化。ADC 代码存储在一个具有可编程深度的 128 样本先进先出块 (FIFO) 中。您可以使用 I2C 接口或串行外设接口 (SPI) 读取 FIFO。该 AFE 还带有 8 位电流控制的完全集成式 LED 驱动器。该器件具有高动态范围的收发电路,可提供高达 100dB 的动态范围,从而实现精确的心率传感。该 AFE 通过以超低功耗 (ULP) 模式(通过使用 ENABLE_ULP 寄存器位进行设置)运行来实现极低的电流电平。

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