类比半导体推出生物电势测量模拟前端AFE96x,助力高端脑电芯片国产替代

Release time:2023-05-04
author:Ameya360
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  致力于提供高品质芯片的国内优秀模拟及数模混合芯片设计商上海类比半导体技术有限公司(下称“类比半导体”或“类比”)宣布推出低噪声、多通道EEG生物电势信号测量模拟前端AFE96x。AFE964、AFE966 和 AFE968 器件是一系列四通道、六通道和八通道低噪声、24 位同步采样 Δ-Σ 模数转换器(ADC)系列产品。该系列产品内置可编程增益放大器 (PGA)、三种可配置内部基准以及板载振荡器,在共模抑制比(CMRR)和串扰(Crosstalk)等性能上均有大幅提升。AFE96x提供三种工作模式,满足具备颅外脑电图 (EEG) 和心电图 (ECG) 应用所需的全部常用功能和功耗模式需求。

  AFE96x系列模拟前端在每条通道中都配有一个灵活的输入多路复用器,该复用器可与内部生成的信号独立相连,完成测试、温度和导联断开检测;此外,可选择输入通道的任一配置生成患者偏置输出信号,提供可选正负极SRB引脚, 旨在将公共信号路由至参考蒙太奇配置的多路输入。AFE96x支持以 125SPS至32kSPS的数据传输速率运行, 并增加了AC激励源和VDAC激励源。凭借高集成度和出色性能, AFE96x 能够以大幅缩小的尺寸、显著降低的功耗和成本来构建可扩展的医疗仪器系统。得益于支持高速SPI串行接口和菊花链,AFE96x可在多通道系统中采用菊花链配置串联多个AFE96x器件。另外,AFE96x与类比现有产品AFE94x管脚兼容。

  产品特性

1、多达八个低噪声可编程增益放大器(PGA)和八个高分辨率同步采样模数转换器(ADC)

2、输入参考噪声:1.6 µVPP

3、输入偏置电流:300pA

4、数据速率:125SPS 至 32KSPS

5、工作模式:–高速模式–低速模式–超低功耗模式(8mW)

6、共模抑制比:−130dB

7、可编程增益:1、2、4、6、8、12、24或48

8、单极或双极电源:–模拟:2.7V至5.5V–数字:1.8V至3.6V

9、内置偏置驱动放大器、AC/DC导联脱落检测、测试信号

10、内置振荡器

11、三种可配置内部或外部参考

12、VDAC激励源

13、灵活的掉电、待机低功耗模式

14、SPI兼容串行接口,菊花链

15、工作温度范围:−40°C至+85°C

16、封装形式:QFP64,BGA64

17、脑电图(EEG)及脑机接口(BCI)研究

18、胎儿心电图(ECG)检测

19、睡眠研究监视器

20、双谱指数(BIS)

21、诱发音频电位(EAP)

类比半导体推出生物电势测量模拟前端AFE96x,助力高端脑电芯片国产替代

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