AFE4500YBGT [TI]
用于生物阻抗分析和电、光学生物传感的集成模拟前端 (AFE) | YBG | 42 | -40 to 85;
| 型号： | AFE4500YBGT |
| 厂家： | 
TEXAS INSTRUMENTS |
| 描述： | 用于生物阻抗分析和电、光学生物传感的集成模拟前端 (AFE) | YBG | 42 | -40 to 85 |
| 文件： | 总8页 (文件大小：754K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
AFE4500
ZHCSNS1 –APRIL 2021
适用于生物阻抗分析、电生物传感和光学生物传感的AFE4500 超小型、集成
式AFE
– 支持外部时钟和内部振荡器模式
– 采样深度为256 的FIFO
– SPITM，I2C 接口：可通过引脚进行选择
1 特性
• 集成的Bio-Z、EDA、ECG 和PPG 信号链
– 电源：Rx：1.7V 至1.9V（LDO 旁路），1.9V
至3.6V（LDO 使能）；Tx：3V 至5.5V，
IO:1.7-RX_SUP
• 同步ECG 和ECG 可实现基于PTT 的BP
• Bio-Z 信号链
– 多频人体阻抗分析(BIA)，可编程频率高达
250kHz
2 应用
– 适用于EDA/GSR 的低频激励模式
– 复合(I,Q) 四极阻抗测量
– 具有7 位DAC 的正弦波激励
– 校准方案可补偿电极阻抗，实现准确的Bio-Z
– 自动校准状态机
• 可穿戴设备上的Bio-Z、ECG、PPG、EDA 和BP
• 阻抗谱分析
• 可进行人体成分测量的体重秤
• 电流、电压和电阻感应
• ECG 信号链：
3 说明
– 频率高达2kHz 的单引线ECG 信号采集
– INA 增益在2 至21 的范围内可进行编程
– RLD 输出通过第三电极设置人体偏置
– 输入噪声（0.5Hz 至150Hz）：1kHz 时为
0.75µVrms
AFE4500 是一种多功能信号采集系统，支持三种信号
链。具有集成激励和感应功能的阻抗测量信号链可用于
生物阻抗分析 (BIA)、皮肤电反应分析 (EDA) 和阻抗谱
分析等应用。
器件信息
封装(1)
– ±0.6V 差分直流失调电压和±0.3V 共模范围
– 具有0.4Hz 拐角频率的高通滤波器，可实现快速
饱和恢复
器件型号
封装尺寸（标称值）
AFE4500
DSBGA
3mm x 2.6mm
– >1GΩ输入阻抗，CMRR > 100dB
– 集成式300Hz 抗混叠低通滤波器
– 交流、直流导联脱落检测：1.6nA 至100nA
• PPG 信号链
(1) 如需了解所有可用封装，请参阅数据表末尾的可订购产品附
录。
PPG_INP1
PPG_INM1
– 支持采集多达24 个PPG 信号
– 在每个相位内均可实现灵活的8 个LED、4 个
PD 分配
– 支持采用不同数据速率的PPG 传感器
– 光学回送SNR 为100dB，可通过片上滤波扩展
至110dB
PPG RECEIVE
VDD_INT
LDO
PPG_INP2
PPG_INM2
PPG TRANSMIT
+
NOISE
FILTER
TIA
–
PPG_INP3
PPG_INM3
PPG_INP4
PPG_INM4
AACM
HPF
ECG_CAPP
ECG_CAPM
SPI, I2C
DECIMATION
(PPG)
DIG DEMOD/
DEC (BIA)
256-FIFO
ADC
INA
LPF
LEAD-OFF
RLD AMP
DECIMATION
(ECG)
– 实现持续运行的低电流，其典型值为：LED 为
15μA，接收器为15μA
ECG RECEIVE
Timing
Engine
ECG_RLD
BIA_E1
BIA_CAL1
BIA_E2
• PPG 发送器
OSC
CLK_I,CLK_Q
DEMOD
– 8 位可编程LED 电流，可调范围为25mA 至
250mA
BIA_CAL2
LPF
LPF
INA
BIA_E3
ECG_INM
BIA_E4
HPF1
DEMOD
BIO-Z RECEIVE
– 每相位可编程LED 导通时间
– 支持8 个采用共阳极配置的LED
• PPG 接收器
ECG_INP
CLK_I,CLK_Q
LEAD-
ON DET
+
7b
TIA
DAC
DDS
PLL
–
BIO-Z TRANSMIT
– 支持4 个PD、2 个并行接收路径
– 具有可编程带宽的噪声滤波功能
– 跨阻增益：3.7kΩ至1MΩ
– 8 位环境失调电压减法DAC（范围为16µA 至
256µA）
简化版原理图
– 8 位LED 失调电压减法DAC（范围为32µA 至
64µA）
– 自动环境消除和LED 直流消除
本文档旨在为方便起见，提供有关TI 产品中文版本的信息，以确认产品的概要。有关适用的官方英文版本的最新信息，请访问
www.ti.com，其内容始终优先。TI 不保证翻译的准确性和有效性。在实际设计之前，请务必参考最新版本的英文版本。
English Data Sheet: SBASAC6
AFE4500
ZHCSNS1 –APRIL 2021
www.ti.com.cn
Table of Contents
1 特性................................................................................... 1
2 应用................................................................................... 1
3 说明................................................................................... 1
4 Description (continued).................................................. 3
5 Revision History.............................................................. 3
6 Device and Documentation Support..............................4
6.1 Documentation Support.............................................. 4
6.2 接收文档更新通知....................................................... 4
6.3 支持资源......................................................................4
6.4 Trademarks.................................................................4
6.5 静电放电警告.............................................................. 4
6.6 术语表......................................................................... 5
7 Mechanical, Packaging, and Orderable Information....5
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4 Description (continued)
An ECG receiver with a Right-leg drive (RLD) can enable acquisition of a single-lead ECG from a pair of
electrodes shared with the Bio-impedance measurement. A PPG signal chain comprises of a current driver for
LEDs and a receiver that senses the signal from PDs. The outputs of the three signal chains are digitized by a
common ADC and stored in a FIFO which can be read out using an SPI or I2C interface
5 Revision History
注：以前版本的页码可能与当前版本的页码不同
DATE
REVISION
NOTES
April 2021
*
Initial release
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6 Device and Documentation Support
TI offers an extensive line of development tools. Tools and software to evaluate the performance of the device,
generate code, and develop solutions are listed below.
6.1 Documentation Support
Abbreviations used in this datasheet:
Bio-Z: Bio-impedance. Can be substituted with any other impedance that needs to be measured
BIA: Bioelectrical Impedance analysis/ Bio-impedance analysis. Refers to the measurement and analysis of Bio-
impedance at one or more excitation frequencies. In this datasheet, the abbreviations BIA and Bio-Z are used
interchangeably.
ECG: Electrocardiography
EDA: Electro-dermal activity
GSR: Galvanic Skin response. Used interchangeably with EDA.
HF-BIA: High frequency Bio-impedance analysis.
LF-BIA: Low frequency Bio-impedance analysis
MF-BIA: Medium frequency Bio-impedance analysis
OHRM: Optical Heart-rate monitoring
PPG : Photoplethysmography
PRF: Pulse repetition frequency. Derived from the PPG terminology which refers to the rate at which the LEDs
are turned on (pulsed). Extended to denote the frequency of a periodically repetitive set of operations involving
signal acquisition of PPG, ECG and/or Bio-Z signals.
RLD: Right leg drive. Derived from the clinical ECG terminology where the right leg is driven to set the DC bias
of the body
6.1.1 Related Documentation
6.2 接收文档更新通知
要接收文档更新通知，请导航至 ti.com 上的器件产品文件夹。点击订阅更新 进行注册，即可每周接收产品信息更
改摘要。有关更改的详细信息，请查看任何已修订文档中包含的修订历史记录。
6.3 支持资源
TI E2E™ 支持论坛是工程师的重要参考资料，可直接从专家获得快速、经过验证的解答和设计帮助。搜索现有解
答或提出自己的问题可获得所需的快速设计帮助。
链接的内容由各个贡献者“按原样”提供。这些内容并不构成 TI 技术规范，并且不一定反映 TI 的观点；请参阅
TI 的《使用条款》。
6.4 Trademarks
TI E2E™ is a trademark of Texas Instruments.
所有商标均为其各自所有者的财产。
6.5 静电放电警告
静电放电(ESD) 会损坏这个集成电路。德州仪器(TI) 建议通过适当的预防措施处理所有集成电路。如果不遵守正确的处理
和安装程序，可能会损坏集成电路。
ESD 的损坏小至导致微小的性能降级，大至整个器件故障。精密的集成电路可能更容易受到损坏，这是因为非常细微的参
数更改都可能会导致器件与其发布的规格不相符。
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6.6 术语表
TI 术语表
本术语表列出并解释了术语、首字母缩略词和定义。
7 Mechanical, Packaging, and Orderable Information
The following pages include mechanical, packaging, and orderable information. This information is the most
current data available for the designated devices. This data is subject to change without notice and revision of
this document. For browser-based versions of this data sheet, refer to the left-hand navigation.
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PACKAGE OPTION ADDENDUM
www.ti.com
1-May-2021
PACKAGING INFORMATION
Orderable Device
Status Package Type Package Pins Package
Eco Plan
Lead finish/
Ball material
MSL Peak Temp
Op Temp (°C)
Device Marking
Samples
Drawing
Qty
(1)
(2)
(3)
(4/5)
(6)
AFE4500YBGR
AFE4500YBGT
ACTIVE
ACTIVE
DSBGA
DSBGA
YBG
YBG
42
42
3000 RoHS & Green
250 RoHS & Green
SAC396
Level-1-260C-UNLIM
Level-1-260C-UNLIM
-40 to 85
-40 to 85
AFE4500
AFE4500
SAC396
(1) The marketing status values are defined as follows:
ACTIVE: Product device recommended for new designs.
LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect.
NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design.
PREVIEW: Device has been announced but is not in production. Samples may or may not be available.
OBSOLETE: TI has discontinued the production of the device.
(2) RoHS: TI defines "RoHS" to mean semiconductor products that are compliant with the current EU RoHS requirements for all 10 RoHS substances, including the requirement that RoHS substance
do not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, "RoHS" products are suitable for use in specified lead-free processes. TI may
reference these types of products as "Pb-Free".
RoHS Exempt: TI defines "RoHS Exempt" to mean products that contain lead but are compliant with EU RoHS pursuant to a specific EU RoHS exemption.
Green: TI defines "Green" to mean the content of Chlorine (Cl) and Bromine (Br) based flame retardants meet JS709B low halogen requirements of <=1000ppm threshold. Antimony trioxide based
flame retardants must also meet the <=1000ppm threshold requirement.
(3) MSL, Peak Temp. - The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder temperature.
(4) There may be additional marking, which relates to the logo, the lot trace code information, or the environmental category on the device.
(5) Multiple Device Markings will be inside parentheses. Only one Device Marking contained in parentheses and separated by a "~" will appear on a device. If a line is indented then it is a continuation
of the previous line and the two combined represent the entire Device Marking for that device.
(6)
Lead finish/Ball material - Orderable Devices may have multiple material finish options. Finish options are separated by a vertical ruled line. Lead finish/Ball material values may wrap to two
lines if the finish value exceeds the maximum column width.
Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is provided. TI bases its knowledge and belief on information
provided by third parties, and makes no representation or warranty as to the accuracy of such information. Efforts are underway to better integrate information from third parties. TI has taken and
continues to take reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on incoming materials and chemicals.
TI and TI suppliers consider certain information to be proprietary, and thus CAS numbers and other limited information may not be available for release.
In no event shall TI's liability arising out of such information exceed the total purchase price of the TI part(s) at issue in this document sold by TI to Customer on an annual basis.
Addendum-Page 1
PACKAGE OPTION ADDENDUM
www.ti.com
1-May-2021
Addendum-Page 2
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