传感器论坛 - 最近的话题

TMCS1108EVM: 開發測試樣品需求

奕甫 TSAI — Wed, 14 Oct 2026 03:56:59 GMT

Part Number: TMCS1108EVM

這邊開發測試需要申請1個樣品

RE: TMCS1108EVM: 開發測試樣品需求

Eirwen — Wed, 14 Oct 2026 04:48:22 GMT

请按照以下链接联系客户支持中心，会有客服为您提供帮助：
ticsc.service-now.com/csm

RE: FDC2214EVM: Calculate sensor capacitance in FDC2214 EVM single ended connection method

Chase Girard — Tue, 13 Oct 2026 21:25:52 GMT

连接关系

在单端模式下，三个电容并非全部并联。传感器电容和寄生电容构成串联对，该串联等效电路与固定LC谐振电容并联：

因此，对于 EVM 的 33 pF 储罐，FDC2214 报告的是 33 pF + C_EQ，其中 C_EQ 是串联组合 - 永远不会是完整的传感器值1 。

为什么你的计算结果不符

三个相互叠加的原因：

串联分路。将一个传感器端子接地会在回路中引入 INxB 对地阻抗，从而减小谐振回路2所感受到的有效并联电容。这导致 C_SENSOR 1的电容值降低且呈非线性变化。
C_PARASITIC 不是一个单一的已知数值。它综合考虑了电路板、引脚、走线和导线等因素的寄生电容。德州仪器 (TI) 的一个参考设计测量到寄生电容为 14.6 pF，而谐振回路的寄生电容为 39 pF——也就是说，寄生电容可能达到谐振回路电容值的三分之一³ 。走线宽度和布线方式会直接影响 C_PARASITIC：更宽的走线会增加寄生电容并降低传感器频率⁴ 。
灵敏度损失。较大的地面参考寄生信号可以稳定地面参考，但会稀释场信号，从而降低传感器本身的灵敏度⁵ 。

缺口到旗帜

所检索到的资料并未涉及您陶瓷压力传感器的具体双电容结构（例如，两个元件是否共用一个端子）。如果它们共用一个节点，则该共用连接会引入额外的耦合，而上述公式并未考虑这些耦合——因此，在应用该公式之前，请务必确认传感器的内部拓扑结构。

后续问题：能否分享一下传感器连接和断开时测得的 C_TOTAL 读数，以便从数据中分离出寄生效应的影响？

FDC2214EVM: Calculate sensor capacitance in FDC2214 EVM single ended connection method

cunzhong min — Fri, 09 Oct 2026 05:40:11 GMT

Part Number: FDC2214EVM

We need to test the two capacitance sizes of the ceramic pressure sensor, using a single ended connection method and an FDC2214 EVM development board for testing. The entire CEQ capacitance can be measured, including LC oscillation capacitance of 33pf, parasitic capacitance, and sensor capacitance. We need to obtain accurate sensor capacitance, so we need to know the connection relationship between these three capacitors. We calculated according to the "FDC2x1y Single ended sensor" method, but we still couldn't get accurate results.

Please provide guidance.

PGA970: PGA970 – Can the S1/S2 amplitude demodulators work with an external 24.42-kHz excitation?

Z Z — Wed, 07 Oct 2026 11:32:34 GMT

Part Number: PGA970

Hello,

I am evaluating the PGA970 as a replacement for an AD698 in an inductive displacement sensor application.

My sensor is not a conventional three-winding LVDT. It is a differential inductive half-bridge consisting of two series-connected sensing coils with a center tap.

The present connection is approximately:

External excitation / ROUT+ / BINP
       24.42 kHz, 0 to 5 V
                |
              Z1(x)
                |
            AINP1
         center tap
                |
              Z2(x)
                |
         ROUT- / BINM
                |
               GND

The existing AD698 uses the excitation signal as the B-channel reference and the center-tap voltage as the A-channel signal.

For the PGA970 replacement, I would like to keep the existing external excitation at 24.42 kHz and 0 to 5 V, rather than using the PGA970 internal waveform generator.

My intended PGA970 signal path is:

S1: attenuated/conditioned center-tap signal AINP1
S2: attenuated/conditioned actual excitation signal ROUT+
Cortex-M0: calculate the ratio of the two demodulated amplitudes

Position would then be obtained from the calibrated value of \(R\).

I do not require phase information for position determination. I mainly need stable amplitude demodulation of both channels.

Could you please confirm the following:

Can the PGA970 S1 and S2 amplitude demodulators correctly process signals generated by an external 24.42-kHz excitation source, while the PGA970 internal primary waveform generator is not used?
Is the amplitude demodulation function inherently synchronized to the PGA970 internal primary excitation, or can it provide a valid amplitude measurement for an asynchronous external excitation?
The documented DEMOD1/DEMOD2 BPF center frequencies appear to extend to approximately 20 kHz. Can the BPF be configured for 24.42 kHz?
If 24.42 kHz is supported, could you provide the recommended BPF coefficients/register configuration for this frequency?
Can the Cortex-M0 access both demodulated amplitude results and calculate

\[ |S1|/|S2| \]

in real time?

My excitation signal is approximately 0 to 5 V at 24.42 kHz. I understand that this signal cannot be connected directly to S2. What input amplitude and common-mode voltage do you recommend after attenuation/AC coupling for S1 and S2?
What is the approximate total signal-chain delay/group delay from S1/S2 input through the digital demodulator to the result available to the Cortex-M0? This sensor will be used as position feedback in a magnetic-bearing closed-loop control system, so latency is important.

My main requirement is to determine whether the PGA970 can replace the AD698 without changing the existing 24.42-kHz sensor excitation.

Thank you.

RE: PGA970: PGA970 – Can the S1/S2 amplitude demodulators work with an external 24.42-kHz excitation?

Alice — Mon, 12 Oct 2026 08:27:01 GMT

您好，

24.42 kHz支持不了。PGA970的典型应用如下链接

PGA970 Use Case for RVDT Applications

PGA970 Use Case for LVDT Applications

[FAQ] PGA970: Is there general information and guidance regarding the PGA970? - Sensors forum - Sensors - TI E2E support forums

RE: AWR2188: 我希望获取AWR2188的资料被拒绝

Eirwen — Mon, 12 Oct 2026 00:51:37 GMT

请按照以下链接联系客户支持中心，会有客服为您提供帮助：
ticsc.service-now.com/csm

AWR2188: 我希望获取AWR2188的资料被拒绝

Yu Fu — Sun, 11 Oct 2026 01:59:47 GMT

Part Number: AWR2188

我希望获取AWR2188的资料被拒绝；
我们计划使用2188来设计一款车载/船载的防撞雷达

RE: AWR2188: 我希望获取AWR2188的资料被拒绝

Eirwen — Sun, 11 Oct 2026 23:04:52 GMT

已经收到了您的案例，调查需要些时间，感谢您的耐心等待。

RE: DRV411: DRV411+HW322B构成的闭环霍尔带宽问题

fenghao sanli — Fri, 09 Oct 2026 10:17:35 GMT

这三个文档都没有说明DRV411是否能够驱动电感达到125mH的补偿线圈，我已经使用了HW322B霍尔器件＋一个补偿线圈来构成了闭环霍尔了，但是测试交流时，精度就差很多，而直流是正常的，这个问题是由什么造成的，是否需要使用双极性外部电源进行驱动这么大电感的补偿线圈才行呢，或者是否有其他方式改善交流精度呢。

DRV411: DRV411+HW322B构成的闭环霍尔带宽问题

fenghao sanli — Thu, 08 Oct 2026 09:57:06 GMT

Part Number: DRV411

DRV411+HW322B构成的闭环霍尔，驱动的补偿绕组电感能达到100mH以上吗，我制作的补偿绕组电感达到125mH，发现在1kHz输出电流误差就达到5%，而在50Hz，输出电流误差仅为0.1%，电路使用DRV411直接驱动补偿绕组，使用Gain_3模式。当补偿绕组的电感较大时，是否需要特殊处理呢，为什么会出现以上现象呢？？

RE: DRV411: DRV411+HW322B构成的闭环霍尔带宽问题

fenghao sanli — Fri, 09 Oct 2026 10:05:40 GMT

再请问使用双极性外部电源驱动补偿线圈的话，参考 ±100 A Closed-Loop Current Sensor Reference Design using Bi-Polar Supplies原理图，是否可以将线性稳压器TPS79850Q使用负压的LDO产生-10V替代呢

RE: DRV411: DRV411+HW322B构成的闭环霍尔带宽问题

Alice — Fri, 09 Oct 2026 10:03:01 GMT

您好，

通常传感器模块包含了compensation coil (with a fixed value) 和 hall sensor.

您需要调整线圈数以满足电流测量要求。

请参考链接文档

TIPD180 ±50A Current Sensor using Closed-Loop Compensated Hall Element

tidu820.pdf

Design Considerations for the DRV411

RE: IWRL6432BOOST: IWRL6432BOOST购买前咨询

Alice — Fri, 09 Oct 2026 09:20:37 GMT

您好，

请参考Pose and Fall User Guide

IWRL6432BOOST: IWRL6432BOOST购买前咨询

JIACHEN LI — Thu, 08 Oct 2026 05:42:18 GMT

Part Number: IWRL6432BOOST

您好，我计划购买 IWRL6432BOOST，用于单人站立、坐姿和跌倒识别的演示，不需要精细人体建模，也不用于医疗或安全保障。

我希望使用现成例程和预训练模型，尽量不自行采集训练数据。购买前请协助确认：

1. 当前发布的 Pose and Fall Estimation 或其他姿态识别例程，是否明确支持 IWRL6432BOOST？能够直接识别哪些状态？尤其是否包含站立、坐姿和跌倒？

2. 是否提供可直接烧录的固件、预训练模型、板卡配置文件及配套上位机？请提供下载链接、软件版本和使用指南。

3. 运行上述演示是否只需要 IWRL6432BOOST、USB连接线和Windows电脑，不需要额外底板、外置调试器或DCA1000采集卡？

4. 是否可以同时获取或保存3D点云数据，包括XYZ坐标和帧编号？是否提供数据协议或Python解析示例？

5. 演示对安装高度、角度、目标距离和场地有什么要求？能否持续区分静止站立与静止坐姿，而不仅是检测运动？

6. 如果后续增加蹲下识别，现成例程是否已经支持？如果不支持，需要修改判断逻辑还是重新训练模型？

感谢！

FDC1004: FDC1004使用？

Simba Su — Thu, 08 Oct 2026 01:44:44 GMT

Part Number: FDC1004

1、根据手册里说的校准的时候使用CAPDAC进行粗调，再使用offset进行细调，最终目的是将寄存器回读的值对应到0pf上吗？

2、回读的真实电容值又加回了CAPDAC的粗调值，但没有加回offset的值是为什么？

RE: FDC1004: FDC1004使用？

Vivian Gao — Fri, 09 Oct 2026 08:51:05 GMT

下方链接有过回复。

FDC1004EVM: How is saturated determined? How to understand CAPDAC and OFFSET_CAL? - Sensors forum - Sensors - TI E2E support forums

RE: DRV411: DRV411+HW322B构成的闭环霍尔带宽问题

Alice — Fri, 09 Oct 2026 04:19:49 GMT

您好，已经收到了您的案例，调查需要些时间，感谢您的耐心等待。

RE: IWRL6432BOOST: IWRL6432BOOST购买前咨询

Alice — Fri, 09 Oct 2026 04:18:07 GMT

您好，已经收到了您的案例，调查需要些时间，感谢您的耐心等待。

RE: IWR6843ISK: IWR6843ISK software download ERROR I need an approval

Eirwen — Thu, 08 Oct 2026 09:41:46 GMT

客户支持平台

IWR6843ISK: IWR6843ISK software download ERROR I need an approval

YU-TAI 育溙 OU 歐 — Thu, 01 Oct 2026 06:35:43 GMT

Part Number: IWR6843ISK

Dear TI Customer Support Team,

I am writing to follow up on my software access request. I previously requested access to download the software, but the request was declined.

To provide more context and verification, I have purchased and currently own the official TI hardware:
- IWR6843ISK evaluation module
- DCA1000EVM data capture board

Version: 2019

I require access to download the corresponding software (e.g., mmWave SDK / mmWave Studio) to capture raw radar data and evaluate these hardware modules for our project.

Could you please assist me in granting the download permissions or let me know if any further end-user verification is required?

Thank you for your support.

Best regards,

FDC2114: CS3608089: 开发板使用问题

cunzhong min — Thu, 08 Oct 2026 07:11:08 GMT

Part Number: FDC2114

使用FDC2214 evm开发过程中有几个问题反馈，已关闭工单是：CS3608089: 开发板使用问题

请查看邮件。

RE: FDC2114: CS3608089: 开发板使用问题

Vivian Gao — Thu, 08 Oct 2026 08:53:12 GMT

如果您重新致电客服中心，会为您重新创建案例，等邮件回复。

RE: PGA970: I would like a specific Pga970 manual.

FRANK1 — Thu, 08 Oct 2026 08:06:44 GMT

Thank you for contacting TI China E2E forum and choosing our products as part of your solution. Regarding your query, please give us some time to confirm this issue.

PGA970: I would like a specific Pga970 manual.

Z Z — Thu, 08 Oct 2026 07:58:27 GMT

Part Number: PGA970

I am currently planning to design a half-bridge inductive displacement sensor. I intend to use the PGA970 for demodulation. I am looking for a detailed manual for the PGA970.

传感器论坛 - 最近的话题

TMCS1108EVM: 開發測試樣品需求

RE: TMCS1108EVM: 開發測試樣品需求

RE: FDC2214EVM: Calculate sensor capacitance in FDC2214 EVM single ended connection method

连接关系

为什么你的计算结果不符

推荐路径

缺口到旗帜

FDC2214EVM: Calculate sensor capacitance in FDC2214 EVM single ended connection method

PGA970: PGA970 – Can the S1/S2 amplitude demodulators work with an external 24.42-kHz excitation?

RE: PGA970: PGA970 – Can the S1/S2 amplitude demodulators work with an external 24.42-kHz excitation?

RE: AWR2188: 我希望获取AWR2188的资料被拒绝

AWR2188: 我希望获取AWR2188的资料被拒绝

RE: AWR2188: 我希望获取AWR2188的资料被拒绝

RE: DRV411: DRV411+HW322B构成的闭环霍尔带宽问题

DRV411: DRV411+HW322B构成的闭环霍尔带宽问题

RE: DRV411: DRV411+HW322B构成的闭环霍尔带宽问题

RE: DRV411: DRV411+HW322B构成的闭环霍尔带宽问题

RE: IWRL6432BOOST: IWRL6432BOOST购买前咨询

IWRL6432BOOST: IWRL6432BOOST购买前咨询

FDC1004: FDC1004使用？

RE: FDC1004: FDC1004使用？

RE: DRV411: DRV411+HW322B构成的闭环霍尔带宽问题

RE: IWRL6432BOOST: IWRL6432BOOST购买前咨询

RE: IWR6843ISK: IWR6843ISK software download ERROR I need an approval

IWR6843ISK: IWR6843ISK software download ERROR I need an approval

FDC2114: CS3608089: 开发板使用问题

RE: FDC2114: CS3608089: 开发板使用问题

RE: PGA970: I would like a specific Pga970 manual.

PGA970: I would like a specific Pga970 manual.