Datasheet > AFE4950YBGT

AFE4950YBGT

更新时间： 2024-11-08 02:51:55

品牌	Logo	应用领域
德州仪器 - TI		监控
页数	文件大小	规格书
8页	977K
描述
AFE4950 Ultra-Small, Integrated AFE for Wearable Optical Heart-Rate Monitoring, SpO2 and Electrical Bio-sensing

阅读下载

中文翻译

获取价格

数据手册

如果您发现信息不准确，欢迎纠错

AFE4950YBGT 数据手册

AFE4950

_{SBASA37A – JUNE 2020 – REVISED OCT}A_OBF_EE_R4₂9₀5₂0₀

SBASA37A – JUNE 2020 – REVISED OCTOBER 2020

www.ti.com

AFE4950 Ultra-Small, Integrated AFE for Wearable Optical Heart-Rate Monitoring,

SpO2 and Electrical Bio-sensing

•

Acquire data synchronized with system master

clock

1 Features

•

Supports simultaneous & synchronized acquisition

of up to 24 PPG and a single-lead ECG signal.

Flexible allocation of 8 LED, 4 PD in each phase

ECG signal chain:

– 1-lead ECG signal acquisition up to 2 kHz

– RLD output to drive a third electrode

– Input noise : 0.7 µV-rms

– Supports up to +/- 0.65 V differential DC offset

and +/-0.55 V common mode range

– Programmable INA gain: 11, 21

– High-pass filter with quick saturation recovery

– Integrated 300 Hz anti-aliasing low pass filter

– AC, DC lead-off detect: 2.6-nA to 85-nA

– Low power continuous lead-on detection

Impedance signal chain

– Continuous low-power monitoring of impedance

between 2 electrodes

– 7 MΩ range

– 300 Ω noise on 620 kΩ

PPG Transmitter:

– 8-Bit Programmable LED Current with range

adjustable from 25 mA to 250 mA

– Mode to fire two LEDs in parallel

– Support of 8 LEDs in Common Anode

configuration for SpO2, Multi-Wavelength HRM

PPG Receiver:

– 2 parallel receivers (two sets of TIA/ filter)

– Supports 4 Time-Multiplexed Photodiode Inputs

to each Receiver

•

FIFO with 256-sample Depth

SPI, I²C interfaces: Selectable by pin

2.6-mm × 2.5-mm DSBGA, 0.4-mm Pitch

Supplies: Rx:1.7-1.9V (LDO Bypass); 1.9-3.6V

(LDO Enabled), Tx:3-5.5V, IO:1.7-RX_SUP

•

2 Applications

•

Optical Heart-Rate Monitoring (HRM) for

Wearables, Hearables

High performance ECG signal acquisition

Synchronized PPG, ECG for BP estimation

Heart-rate variability (HRV)

•

Pulse oximetry (SpO₂) measurements

3 Description

•

The AFE4950 device is an analog front-end (AFE) for

synchronized signal acquisition of PPG and ECG

signals. The device can also be used for optical bio-

sensing applications, such as heart-rate monitoring

(HRM) and saturation of peripheral capillary oxygen

(SpO2). The ECG signal chain supports 2- and 3-

electrode configurations and has an integrated Right

leg drive (RLD) buffer. The ECG signal chain can also

be used to do a continuous, low-power monitoring of

the impedance between pair of electrodes.

Device Information

PART NUMBER

AFE4950

PACKAGE⁽¹⁾

BODY SIZE (NOM)

•

DSBGA (36)

2.60 mm × 2.50 mm

(1) For all available packages, see the orderable addendum at

the end of the data sheet.

– 8-bit Ambient Offset subtraction at each TIA

input with 256 µA range

– 8-bit LED Offset Subtraction DAC with 64 µA

range

– Automatic ambient cancellation and dynamic

LED DC cancellation at TIA input

– Ambient rejection close to 100 dB up to 10 Hz

– Noise filtering with programmable bandwidth

– Trans-impedance Gain: 3.7 kΩ to 1 MΩ

Accurate, Continuous Heart-Rate Monitoring:

– System SNR up to 109-dB at 16 µA PD current

– Low Current for Continuous Operation on a

Wearable Device with a Typical Value: 15-μA

for an LED, 20-μA for the Receiver

External clock and internal oscillator modes

•

Simplified Schematic

An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,

intellectual property matters and other important disclaimers. PRODUCTION DATA.

Submit Document Feedback

Product Folder Links: AFE4950

12 3 4 5 6 7 8

中文翻译

下载PDF

与AFE4950YBGT相关器件

型号	品牌	获取价格	描述	数据表
AFE4960	TI	获取价格	具有集成式呼吸和起搏信号检测功能的双通道 ECG 模拟前端
AFE4960P	TI	获取价格	具有集成式呼吸和起搏信号检测功能的双通道 ECG 和 PPG 模拟前端
AFE4960PYBGR	TI	获取价格	具有集成式呼吸和起搏信号检测功能的双通道 ECG 和 PPG 模拟前端 \| YBG \| 3
AFE4960PYBGT	TI	获取价格	具有集成式呼吸和起搏信号检测功能的双通道 ECG 和 PPG 模拟前端 \| YBG \| 3
AFE4960YBGR	TI	获取价格	具有集成式呼吸和起搏信号检测功能的双通道 ECG 模拟前端 \| YBG \| 36 \| -4
AFE4960YBGT	TI	获取价格	具有集成式呼吸和起搏信号检测功能的双通道 ECG 模拟前端 \| YBG \| 36 \| -4
AFE49I30	TI	获取价格	用于可穿戴式光学生物传感、具有 FIFO、I2C 和 ECG 的超低功耗集成 AFE
AFE49I30YZR	TI	获取价格	用于可穿戴式光学生物传感、具有 FIFO、I2C 和 ECG 的超低功耗集成 AFE \|
AFE49I30YZT	TI	获取价格	用于可穿戴式光学生物传感、具有 FIFO、I2C 和 ECG 的超低功耗集成 AFE \|
AFE5100	ETC	获取价格	Optoelectronic

与AFE4950YBGT相关文章

英伟达新AI芯片Rubin或提前半年亮相
2024-11-05

19
苹果iPhone 17将全系采用三星/LG显示LTPO OLED面板
2024-11-05

16
三星深化印度制造布局，供应链本地化进程加速
2024-10-29

39
芯擎科技“星辰一号”自动驾驶芯片点亮成功，2025年量产在即
2024-10-29

37

产品中心

服务支持

精选活动

关于我们

帮助中心

AFE4950YBGT

AFE4950YBGT 数据手册

与AFE4950YBGT相关器件

与AFE4950YBGT相关文章

您还可以找

产品中心

服务支持

精选活动

关于我们

帮助中心

AFE4950YBGT

AFE4950YBGT 数据手册

与AFE4950YBGT相关器件

与AFE4950YBGT相关文章

您还可以找

您在本页遇到什么问题？