AFE4432 Ultra-Small, Integrated AFE for Optical Bio-Sensing

1 Features • Supports signal acquisition of up to 12 phase sets • Supports up to 4 LEDs, 3 PDs • Flexible allocation of LEDs, PDs in each phase • Simultaneous signal acquisition from different sensors at different data rates • Accurate, continuous PPG monitoring: – Low current for continuou

文件：714.86 Kbytes 页数：11 Pages

TI

德州仪器

AFE4432 Ultra-Small, Integrated AFE for Optical Bio-Sensing

1 Features • Supports signal acquisition of up to 12 phase sets • Supports up to 4 LEDs, 3 PDs • Flexible allocation of LEDs, PDs in each phase • Simultaneous signal acquisition from different sensors at different data rates • Accurate, continuous PPG monitoring: – Low current for continuou

文件：704.72 Kbytes 页数：10 Pages

TI

德州仪器

丝印：AFE4432；Package：DSBGA；AFE4432 Ultra-Small, Integrated AFE for Optical Bio-Sensing

1 Features • Supports signal acquisition of up to 12 phase sets • Supports up to 4 LEDs, 3 PDs • Flexible allocation of LEDs, PDs in each phase • Simultaneous signal acquisition from different sensors at different data rates • Accurate, continuous PPG monitoring: – Low current for continuou

文件：704.72 Kbytes 页数：10 Pages

TI

德州仪器

丝印：AFE4432；Package：DSBGA；AFE4432 Ultra-Small, Integrated AFE for Optical Bio-Sensing

1 Features • Supports signal acquisition of up to 12 phase sets • Supports up to 4 LEDs, 3 PDs • Flexible allocation of LEDs, PDs in each phase • Simultaneous signal acquisition from different sensors at different data rates • Accurate, continuous PPG monitoring: – Low current for continuou

文件：714.86 Kbytes 页数：11 Pages

TI

德州仪器

丝印：AFE4432；Package：DSBGA；AFE4432 Ultra-Small, Integrated AFE for Optical Bio-Sensing

1 Features • Supports signal acquisition of up to 12 phase sets • Supports up to 4 LEDs, 3 PDs • Flexible allocation of LEDs, PDs in each phase • Simultaneous signal acquisition from different sensors at different data rates • Accurate, continuous PPG monitoring: – Low current for continuou

文件：714.86 Kbytes 页数：11 Pages

TI

德州仪器

丝印：AFE4432；Package：DSBGA；AFE4432 Ultra-Small, Integrated AFE for Optical Bio-Sensing

1 Features • Supports signal acquisition of up to 12 phase sets • Supports up to 4 LEDs, 3 PDs • Flexible allocation of LEDs, PDs in each phase • Simultaneous signal acquisition from different sensors at different data rates • Accurate, continuous PPG monitoring: – Low current for continuou

文件：704.72 Kbytes 页数：10 Pages

TI

德州仪器

具有 FIFO 且适用于可穿戴设备光学生物传感的超小型、超低功耗、高 SNR 集成式 AFE

AFE4432 是一款面向诸如心率监测 (HRM) 和周围毛细血管氧饱和度 (SpO2) 测量等光学生物传感应用的模拟前端。该器件支持多达 4 个开关发光二极管 (LED) 和三个光电二极管 (PD)。AFE 配有两个带 8 位电流控制的 LED 驱动器。该器件具有宽动态范围的发送和接收电路，有助于检测超小信号电平。可定义多达 12 个信号相位集，每个相位集都包含 LED 和环境相位的组合。接收器输入端的低噪声失调 DAC 可自动控制，从而消除环境光和 LED 光产生的直流。在各相位中，PD 所产生的电流先经 TIA 转换为电压，再滤波，然后使用通用 ADC 进行数字化。ADC 代码可存储在 • 支持多达 12 个相位集的信号采集\n• 在每个相位内均可实现灵活的 LED 和 PD 分配\n• 精确、连续的 PPG 监测： \n• 在 0.5Hz - 10Hz 频带内的峰值系统 SNR 为 115dB，可实现高精度 SpO2 测量\n• 发送器： \n• 可点亮两个并联 LED 且具有独立的每相位电流控制功能的模式\n• 同时支持 4 个 LED，适用于 SpO2、多波长 HRM\n• 接收器： \n• 2 个并行接收器（2 组 TIA/滤波器）\n• 每个 TIA 输入端具有单独的 LED 失调电压消减 DAC，各相控制均为 9 位，范围为 64µA\n• 具有可编程带宽的噪声滤;

TI

德州仪器

AFE4432 Ultra-Small, Integrated AFE for Optical Bio-Sensing

1 Features • Supports signal acquisition of up to 12 phase sets • Supports up to 4 LEDs, 3 PDs • Flexible allocation of LEDs, PDs in each phase • Simultaneous signal acquisition from different sensors at different data rates • Accurate, continuous PPG monitoring: – Low current for continuou

文件：704.72 Kbytes 页数：10 Pages

TI

德州仪器

AFE4432 Ultra-Small, Integrated AFE for Optical Bio-Sensing

1 Features • Supports signal acquisition of up to 12 phase sets • Supports up to 4 LEDs, 3 PDs • Flexible allocation of LEDs, PDs in each phase • Simultaneous signal acquisition from different sensors at different data rates • Accurate, continuous PPG monitoring: – Low current for continuou

文件：704.72 Kbytes 页数：10 Pages

TI

德州仪器