射频与微波论坛 - 最近的话题

ADS127L18EVM-PDK: ADS127L18 EVM: Irreducible ~100 fs Floor in Dual-Channel Residual Phase Noise Measurement.

C.H. Hsueh — Sun, 26 Jul 2026 08:44:13 GMT

Part Number: ADS127L18EVM-PDK
Other Parts Discussed in Thread: ADS127L18

Hi TI team,

We are measuring the residual phase noise / relative timing drift between two channels of ADS127L18 EVM.

Setup: a single tone (frequency) from a source is split into two, fed into two ADC channels independently. After digital IQ demodulation per channel, we compute the phase difference (φ_ch1 − φ_ch2) to reject common-mode noise (source phase noise, clock jitter). The differential phase is converted to delay (τ = φ/2πf) and analyzed via Allan deviation.

Observations that confuse us:

1. Regardless of input frequency or amplitude, the relative delay Allan deviation always converges to a floor of ~100 fs. Higher frequencies converge to this floor faster, but the floor value is the same.

2. Injecting a pilot tone before the splitter does NOT improve the ~100 fs floor. The residual noise appears to be frequency-independent and not removable by common-mode correction.

Since common-mode noise (source, clock) is already rejected by the differential measurement, and pilot tone fails to help, the floor must originate from something inside each ADC channel that is both channel-independent and pilot-insensitive.

What could cause this ~100 fs irreducible floor? Is this a known behavior of ADS127L18 in dual-channel relative timing applications?

We can share Allan deviation plots and raw data if needed. Thank you.

Best regards,
C.H. Hsueh

LMX8410L: 技术咨询

Xu Allen — Wed, 22 Jul 2026 04:34:43 GMT

Part Number: LMX8410L

你好，

在使用LMX8410RGZT是遇到两个问题，请帮忙解答一下，谢谢！

1、官网没有LMX8410LEVM的gerber，请提供一下。

2、参考设计中有三根电源线走线特意绕长，这是出于什么考虑？是否可以不用这么做？

AFE7799: 库存订阅推送 API返回403状态码，麻烦看一下,谢谢。

huixin an — Tue, 16 Jun 2026 09:49:07 GMT

Part Number: AFE7799

在TI store API 套件中设置了库存订阅推送 API，但是在postman用POST请求的时候，返回403错误，截图如下所示，麻烦看一下，给出一个解决方案，谢谢了。

AFE7903: Can AFE7903 work for wifi 6E 5G and 6G frequency band? which IC can support wifi 6E frequency band?

Xiaodong Yu — Fri, 15 May 2026 08:59:52 GMT

Part Number: AFE7903
Other Parts Discussed in Thread: AFE7900,

Dear Sir/Madam

we want to make a product to work on Wifi 6E frequency band especially the 5G and 6GHz band. We checked AFE7900 adc/dac, we find the maxim ADC rate is 3Gsps. SinceWIFI 6E 5G and 6GHz band are very close we can not seperate them. So the total bandwidth of 5G+6G band is 2GHz, it seams 3Gsps ADC can not work on the 2GHz bandwith. is it correct? How can we solve the issue. any other TI's IC can work on Wifi 6E?

Regards

AWR2188-SAFETY: AWR2188 document download access denied

zhaoyu xiong — Sun, 03 May 2026 14:37:00 GMT

Part Number: AWR2188-SAFETY
Other Parts Discussed in Thread: AWR2188

AWR2188 technical documentation access denied. Please approve my download request.

AWR2188-SAFETY: AWR2188 开发软件资料下载

zhaoyu xiong — Sun, 03 May 2026 14:30:19 GMT

Part Number: AWR2188-SAFETY
Other Parts Discussed in Thread: AWR2188

hi, AWR2188 芯片开发软件相关资料下载被拒，请麻烦通过一下

AFE7769D: 输出GSM信号时该如何配置CFR_DPD文件

jiang xiansheng — Sat, 11 Apr 2026 15:01:34 GMT

Part Number: AFE7769D

采用的是 CFR Mode = pc cfr mod, PC waveform is Carrier profile based waveform, 如果我们的配置是20MHz的LTE信号与3个GSM载波信号，请问number of carriers 应该选4还是选1，如果是选4个载波，那么GSM载波的带宽该选多少？（配置文件里面可以选择的最小带宽是1.4MHz LTE载波）；或者针对有GSM的载波的情况下，你们有推荐的更合适的CFR配置方式。

AFE7769D: AFE7769D输出单音上有杂散

jiang xiansheng — Sat, 11 Apr 2026 14:54:16 GMT

Part Number: AFE7769D

AFE7769D自己产生单音时，在单音左右频偏496KHz处有65dBc的杂散，改变单音的评论，杂散跟随单音走。
已经排除了射频参考信号和系统参考上频偏496KHz处有杂散的可能；已经排除了7769D 几个电源上携带496KHz电源纹波的可能；排除了板子上其它电源携带496KHz电源纹波的可能。现在怀疑是7769D自己产生了该杂散，请问能否通过修改锁相环的环路滤波器带宽来优化这个杂散，且如何修改环路滤波器带宽？

TRF3722: CAPM调制器失锁问题

DARK NIE — Fri, 26 Dec 2025 01:59:43 GMT

Part Number: TRF3722

TRF3722IRGZR在测试时发现需要手动发送测试指令检测TX1-TX4 调制器对1030Mhz的锁定情况，之前使用过其他不同生产日期的物料后现象消失，最近又有该不良。

这种在1030Mhz频率下失锁的情况只能手动测试拦截.到底哪里的问题呢？有什么方法解决吗？

IWR6843AOP: mmwave_industrial_toolbox_4_12_1 3D_People_Counting

haowei li — Thu, 25 Dec 2025 01:27:43 GMT

Part Number: IWR6843AOP

I imported the 3D_People_Counting demo into CCS and compiled it, but after compilation the following error appeared

AFE8192EVM: AFE8128EVM RX gain and ripple

Yun Zhang — Wed, 19 Nov 2025 08:10:36 GMT

Part Number: AFE8192EVM
Other Parts Discussed in Thread: AFE8128EVM

I tested the RX of AFE8128EVM and found some issues in the 1.7-1.8GHz frequency band.

1. The return loss of odd channels is very good, better than 15dB, while the even channels is very poor, only -5dB.

2. With the same input power, the gain of even channels is 1.5dB lower than that of odd channels.

Based on our experience analysis, problems 1 and 2 are likely caused by the same reason, that is, the differential matching network of even channels is not optimal.

Please help me confirm if the differential matching network of RX in the EVM schematic is correct.

TDA2XX的RTOS系统怎么实现GPIO输入中断

He J.W — Wed, 27 Aug 2025 11:53:33 GMT

TDA2XX的RTOS系统，设置GPIO1_0作为输入中断，设置中断的代码应该是什么？

\ti_components\drivers\pdk_01_10_04_05\packages\ti\csl\example\gpio\gpio_interrupt中的设置中断为

void configurGpioInterrupt()
{
#if IRQ_XBAR_CFG_REQUIRED
/* XBar configuration */
CSL_xbarIrqConfigure(IRQ_XBAR_CPU_ID,IRQ_XBAR_INST_NO,IRQ_XBAR_INDEX);
#endif
Intc_Init();
Intc_IntEnable(interrupt_num);

Intc_IntRegister(interrupt_num, (IntrFuncPtr) gpioIsr, (void *) 0);
Intc_IntPrioritySet(interrupt_num, 1, 0);
Intc_SystemEnable(interrupt_num);
}

这代码应该不是用于ipu和rtos系统，可用于ipu和rtos系统的设置中断的函数代码是什么？

LAUNCHXL-CC1310: 使用开发板上的扩展引脚DIO2和DIO3串口向外发送数据

hello_bug — Tue, 08 Jul 2025 15:18:45 GMT

Part Number: LAUNCHXL-CC1310
Other Parts Discussed in Thread: CC1310

想使用LAUNCHXL-CC1310板子上的排针引脚DIO2和DIO3接收和发送数据，不是通过XDS110的那个USER UART，这个怎么做

现在使用NORTOS的uartecho例程，烧写进板子，将短接跳块那里的RXD和TXD断开；经过测试，选择XDS110的USER UART所对应的串口与串口工具进行收发测试，发送一个字节，不会返回这个字节，说明断开RXD和TXD是有用的。

通过USB转TTL工具，分别连接DIO2-RX ，DIO3-TX，GND；使用串口工具软件做同样测试，发送一个字节，不会返回这个字节。后来做测试，收到特殊的一个字节，点亮绿灯，是能点亮的，说明收到了字节，也进入了发送函数，但串口工具没收到；收发连接线倒过位置，一样不行。

请问这样应该如何解决。

ADS58C20: 关于1.9Vpp差分输入未达到满量程的疑问咨询？

benson luo — Wed, 18 Jun 2025 13:45:44 GMT

Part Number: ADS58C20

您好！

ADS58C20 规格书48页描述：原文“ For a full-scale differential input, each input pin INP, INM has to swing symmetrically between VCM + 0.45V and VCM – 0.45V, resulting in a 1.9VPP differential input swing.”

从规格书我理解是，INP 和 INM输入在 1.9+ 0.45V 和 1.9 – 0.45V 间摆动，1.9Vpp（0.45*4）差分输入可达到ADC的满量程

而我们实际测试情况与规格书描述为什么不一致：

1、测试环境：

搭建测试环境如下图，信号发生器输出阻抗50Ω，配置30MHz正弦、1.9Vpp差分信号（示波器验证幅度ok），经0.1uF隔直电容输入至ADC（14bit），采集数字信号只有4000，未达到14bit（8192）的满量程；

此时继续提高输入信号幅度至3.8Vpp，可达到数字信号满量程8192（2的13次方）

2、问题点：

1）测试情况与规格书描述不一致，差分1.9Vpp并未达到满量程（只有一半4000左右）；

2）差分输入3.8Vpp（1.9Vpp*2），ADC才达到满量程8192输出，请问是否规格书描述有误，还是存在其他问题？

希望能尽快收到您的回复！

感谢支持！！

AFE7955: ADC采集功能正常，但是DAC端口无信号输出

zeibor — Sat, 24 May 2025 14:51:52 GMT

Part Number: AFE7955
Other Parts Discussed in Thread: AFE7950,

1、硬件设计：

参考的AFE7950，但是对于DAC端的输出信号设计的阻抗为100欧，经过巴伦转换至单端信号的阻抗为50欧，其他的电路设计几乎与开发板一致。电路设计如下图，画圈处与DAC的输出端直连，该点无信号输出。

，2、软件设计：

通过初始化配置，满足设计要求。

希望TI技术支持能给一些指导建议，期待你的回复，谢谢！

AFE8000EVM: 使用204C IP的ZCU102参考例程不能运行。

lan zhipian — Thu, 08 May 2025 16:43:06 GMT

Part Number: AFE8000EVM
Other Parts Discussed in Thread: AFE8000

我正在使用AFE8000EVM 204C IP压缩包里提供zcu102的参考例程。我参考了这个帖子进行设置，[参考译文] AFE8000EVM：使用 TI-JESD204C (64b/66B)将 EVM 连接到 zcu102 - 射频与微波（参考译文帖）(Read Only) - 射频与微波（参考译文帖） - E2E™ 设计支持，步骤和excel配置相同。但是ADC仍然不能工作。

以下是AFE80xxCat输出。

AFE80xxCatLibrary

spi - USB Instrument created.

resetDevice

Kintex RegProgrammer - USB Instrument created.

Power Card - USB Instrument created.

cpldRegProg._pin0 : write failed.

cpldRegProg._pin1 : write failed.

cpldRegProg._pin2 : write failed.

cpldRegProg._pin3 : write failed.

cpldRegProg._pin4 : write failed.

cpldRegProg._pin5 : write failed.

cpldRegProg._pin6 : write failed.

cpldRegProg._pin7 : write failed.

Reset the FPGA and try again.

Loaded Libraries

FPGA Reset device not found

Reset the FPGA and try again.

FPGA Reset device not found

Loaded Configuration: AFE8000_SampleConfig.xlsx

Refreshed the GUI.

#================ ERRORS:4, WARNINGS:8 ================#

#================ ERRORS:0, WARNINGS:0 ================#

Loaded Configuration: AFE8000EVM_TI_JESD204C.xlsx

In L=8 single link mode, the Sync Mux should be same for all mappers. Forcing the rxJesdTxSyncMux value to [0, 0, 0, 0]

Refreshed the GUI.

For these rates, 1KHz raster mode is not supported. Changing to 32-bit NCO mode.

Refreshed the GUI.

Applied Parameters.

For these rates, 1KHz raster mode is not supported. Changing to 32-bit NCO mode.

Refreshed the GUI.

Applied Parameters.

Device Initialization for ChipVersion: 2.0

The External Sysref Frequency should be an integer factor of: 0.325521MHz

2T2R1F Number: 0

Valid Configuration: True

laneRateRx: 10312.5

laneRateRx1: 10312.5

laneRateFb: 10312.5

laneRateTx0: 10312.5

laneRateTx1: 10312.5

2T2R1F Number: 1

Valid Configuration: True

laneRateRx: 10312.5

laneRateRx1: 10312.5

laneRateFb: 10312.5

laneRateTx0: 10312.5

laneRateTx1: 10312.5

LMK Clock Divider - Device registers reset.

LMK and FPGA Configured.

DONOT_OPEN_Afe80xx_FULL - Device registers reset.

chipType: 0xa

chipId: 0x8001

chipVersion: 0x20

LMK and FPGA Configured.

AFE Reset Done

Fuse farm load autoload done successful

No autload error

Fuse farm load autoload done successful

No autload error

//Firmware Version = 9108

//PG Version = 1

//Release Date [dd/mm/yy] = 28/8/20

//Patch Version = 0

//PG Version = 0

//Release Date [dd/mm/yy] = 0/0/0

AFE MCU Wake up done and patch loaded.

PLL Locked

AFE PLL Configured.

AFE SerDes Configured.

AFE Digital Chains configured.

Waiting check for Property_110h_7_0 to become 2, Count: 50

AFE RX Analog configured.

AFE FB Analog configured.

AFE JESD configured.

AFE AGC configured.

AFE PAP and Alarms configured.

AFE GPIO configured.

Sysref Read as expected

Setting RBD to: 2

AFE Configuration Complete

Setting RBD to: 2

#================ ERRORS:0, WARNINGS:0 ================#

I need to look for the FDX-B 32-mm glass transponde. But I searched all the materials and did not find the relevant model

Kevin King — Thu, 24 Apr 2025 07:23:08 GMT

Other Parts Discussed in Thread: RI-TRP-DR2B

I need to look for the FDX-B 32-mm glass transponde. But I searched all the materials and did not find the relevant model

TRF370417: TRF370417

fujun liu — Mon, 20 Jan 2025 02:21:16 GMT

Part Number: TRF370417

DAC输出IQ信号，来控制器件调制输出的相位准确度

买到假货、警察需要德州仪器品牌方出具鉴定报告

?? ? — Wed, 08 Jan 2025 04:33:41 GMT

官方授权经销商缺货、在其他渠道买了1506个、收到货之后为假货、已经报警、警方需要德州仪器品牌方出具的假货报告，警方联系经销商经销商不配合、问这种情况.怎么样才能出具报告

LWIP UDP SERVER SENDING ERROR

miles meng — Tue, 19 Nov 2024 13:32:23 GMT

Other Parts Discussed in Thread: AM2732

Hello, I am using your company's AM2732 + PHY chip dp83tc812 board, UDP transceiver program when encountered problems, I generated a UDP server program based on the official enet _ cpsw _ udpserver routine, and then replaced the phy driver with the dp83tc812 driver, Connected to the PC's sscom for testing, when sending, it returned an error, sendPckt sendto: error "Routing problem.", The location of the error in the program is the udp _ sendto _ chksum () function in udp.c, which returns ERR _ RTE, I don't know how to solve this problem, Also, how to compile the code corresponding to the library file into CCS, so that you can see the debug information?

AFE7950EVM: TSW14J58EVM

baojin tu — Mon, 18 Nov 2024 07:37:56 GMT

Part Number: AFE7950EVM
Other Parts Discussed in Thread: TSW14J58EVM,

Hello, I am currently using the AFE79xx GUI software in conjunction with the AFE7950EVM evaluation board and the TSW14J58EVM for my experiments. During the process of running the setup script, I encountered the following error message.

I have tried running the setup on several different computers, but the result remains the same. Could you please advise on how to resolve this issue?

希望推荐符合要求的产品

Tao Wang — Thu, 07 Nov 2024 12:57:20 GMT

工程师您好。

需要一款芯片开关用于天线通断设计。天线工作于14-16GHz。

设计目标为开关打开时，电路导通，能够有最低的导通损耗。开关断开时，电路断开，能够有尽可能少的能量通过电路。

希望能得到一款最适合该频段的开关产品型号推荐

AFE7921: 关于DAC的RBD问题

ZhiKun Su — Wed, 10 Jul 2024 09:36:05 GMT

Part Number: AFE7921

Hi TI：

　　关于AFE7921 DAC的RBD问题，有如下几个问题需要解答一下：

　　(1) 请问AFE7921 DAC的RBD是如何定义的？

　　(2) RBD的值会受到哪些参数影响？

　　(3) 实际使用的时候，我们应该如何确定RBD的值？

　　(4) JESD204B和JESD204C RBD的值有什么区别？

　　请解答一下，谢谢！

AFE7769: QMC校准问题，LO时大时小

li jiapeng — Tue, 11 Jun 2024 09:06:22 GMT

Part Number: AFE7769

刚开始7769配置里的LO是2400，2500，启动完成后，后续配置为2495以及1992.5，就发现LO一会儿大一会儿小，TX QMC使能查询寄存器是打开的，94-9B这几个寄存器查询时，94 95两个寄存器一会是0，一会儿是其他值，其他的全是0，请问下有没有什么排查方法？

AFE7900EVM: 运行HSDC PRO时出现FPGA复位

beijie li — Sat, 18 May 2024 00:43:26 GMT

Part Number: AFE7900EVM

hi，

我现在在使用AFE7900EVM和TSW14J56两块板子联合调试；按照文档中提到的步骤进行操作，之前一直正常；最近遇到一个问题，收发链路都可以建链成功，但是在收发都建链成功的状态时，在HSDC PRO中点击capture就会造成fpga复位，不知道什么原因会导致这种现象；

thanks！

Arabic	Hebrew	Polish
Bulgarian	Hindi	Portuguese
Catalan	Hmong Daw	Romanian
Chinese Simplified	Hungarian	Russian
Chinese Traditional	Indonesian	Slovak
Czech	Italian	Slovenian
Danish	Japanese	Spanish
Dutch	Klingon	Swedish
English	Korean	Thai
Estonian	Latvian	Turkish
Finnish	Lithuanian	Ukrainian
French	Malay	Urdu
German	Maltese	Vietnamese
Greek	Norwegian	Welsh
Haitian Creole	Persian

Arabic	Hebrew	Polish
Bulgarian	Hindi	Portuguese
Catalan	Hmong Daw	Romanian
Chinese Simplified	Hungarian	Russian
Chinese Traditional	Indonesian	Slovak
Czech	Italian	Slovenian
Danish	Japanese	Spanish
Dutch	Klingon	Swedish
English	Korean	Thai
Estonian	Latvian	Turkish
Finnish	Lithuanian	Ukrainian
French	Malay	Urdu
German	Maltese	Vietnamese
Greek	Norwegian	Welsh
Haitian Creole	Persian

Arabic	Hebrew	Polish
Bulgarian	Hindi	Portuguese
Catalan	Hmong Daw	Romanian
Chinese Simplified	Hungarian	Russian
Chinese Traditional	Indonesian	Slovak
Czech	Italian	Slovenian
Danish	Japanese	Spanish
Dutch	Klingon	Swedish
English	Korean	Thai
Estonian	Latvian	Turkish
Finnish	Lithuanian	Ukrainian
French	Malay	Urdu
German	Maltese	Vietnamese
Greek	Norwegian	Welsh
Haitian Creole	Persian

Arabic	Hebrew	Polish
Bulgarian	Hindi	Portuguese
Catalan	Hmong Daw	Romanian
Chinese Simplified	Hungarian	Russian
Chinese Traditional	Indonesian	Slovak
Czech	Italian	Slovenian
Danish	Japanese	Spanish
Dutch	Klingon	Swedish
English	Korean	Thai
Estonian	Latvian	Turkish
Finnish	Lithuanian	Ukrainian
French	Malay	Urdu
German	Maltese	Vietnamese
Greek	Norwegian	Welsh
Haitian Creole	Persian