https://e2echina.ti.com/support/data-converters/zh-CNTelligent Community 13https://e2echina.ti.com/support/data-converters/f/data-converters-forum/1079398/ads1278-sp-ads1278-drdyMon, 15 Jun 2026 08:51:00 GMT91561404-af28-475a-b96b-cb6cbaadd097:b2e13d1d-b8ad-4987-9540-f7729e9fba1bgao linPart Number: ADS1278-SP 目前，硬件设计置为高速模式（00），外部时钟16.384M，clkdiv = 1，按照手册table8应当计算出为 data rate = 16.384M/256 = 64k，但是实际上LA测得drdy波形周期却对不上。如下图： drdy波形周期约为32k，并且交替出现一个窄波+一个宽波。使用模式为SPI模式，Decreat模式。但是实际上窄的drdy波形宽度符合figure76，宽度为1/64k，并且Tconv时间也符合。 请问我这种现象是否正常，因为drdy实际信号周期为32k。那么为什么又叫data rate 为64k。附上我的硬件电路配置：ADS1278-SPADS1278医疗和保健https://e2echina.ti.com/support/data-converters/f/data-converters-forum/1079098/adc12dj5200rf-adc12dj5200rf-lmx2594-sysref/3885923Mon, 15 Jun 2026 06:06:00 GMT91561404-af28-475a-b96b-cb6cbaadd097:db5ac45f-edac-46dc-86b4-dad0172c2909bian haibo感谢回复， ADC12DJ5200RF的SYSREF的单脉冲和连续脉冲模式如何都需要的话是不是就只能采用LMK00334这种转换连接的方式了？还有另外一个关于ADC12DJ5200RF的SYSREF的问题，在连续脉冲SYSREF模式下，ADC12DJ5200RF岂不是在每个SYSREF的脉冲下都会进行同步？从大部分应用角度看，应用需要同步的时候才会发送一个SYSREF脉冲信号给ADC12DJ5200RF进行同步？连续脉冲的模式应该仅限于ADC12DJ5200RF定期同步的场景吧？https://e2echina.ti.com/support/data-converters/f/data-converters-forum/1079098/adc12dj5200rf-adc12dj5200rf-lmx2594-sysref/3885918Mon, 15 Jun 2026 05:10:00 GMT91561404-af28-475a-b96b-cb6cbaadd097:5fccd3e2-993e-4e76-8325-d52041249a54Alice您好， 是的，我们需要一个额外的芯片来转换共模电压，同时保持对 ADC 的足够电压摆幅。 我认为可以使用一个 HCSL 缓冲器，比如 LMK00334。缓冲器的输入和输出将与 LMX2594 的 RFoutB 以及 ADC 的 SYSREF 输入进行直流耦合。https://e2echina.ti.com/support/data-converters/f/data-converters-forum/1079323/ds560df410evm-ds560df410-gui/3885915Mon, 15 Jun 2026 05:06:00 GMT91561404-af28-475a-b96b-cb6cbaadd097:37ecc87e-0da8-4890-b9f2-76ced0dfd2c8Eirwen建议您请按照以下方式联系客户支持部门，会有客服为您提供帮助。 打开链接 ticsc.service-now.com/csm 点击“申请新的支持”下面的“提交申请”按钮 在新打开的窗口中点击“其他”下面的“创建案例”按钮https://e2echina.ti.com/support/data-converters/f/data-converters-forum/1079323/ds560df410evm-ds560df410-gui/3885879Sun, 14 Jun 2026 22:41:00 GMT91561404-af28-475a-b96b-cb6cbaadd097:4ea8d424-4cb7-420e-9bc1-f890500e1c6eEirwen已经收到了您的案例，调查需要些时间，感谢您的耐心等待https://e2echina.ti.com/support/data-converters/f/data-converters-forum/1079098/adc12dj5200rf-adc12dj5200rf-lmx2594-sysref/3885874Sun, 14 Jun 2026 22:38:00 GMT91561404-af28-475a-b96b-cb6cbaadd097:70170ab8-ed72-4038-b245-28de122e4aa4Eirwen已经收到了您的案例，调查需要些时间，感谢您的耐心等待。https://e2echina.ti.com/support/data-converters/f/data-converters-forum/1079323/ds560df410evm-ds560df410-guiSat, 13 Jun 2026 10:18:00 GMT91561404-af28-475a-b96b-cb6cbaadd097:28fbf152-4d87-46b7-8b6b-fafcece25201zilong xuPart Number: DS560DF410EVMDS560DF410DS560DF410EVMhttps://e2echina.ti.com/support/data-converters/f/data-converters-forum/1079098/adc12dj5200rf-adc12dj5200rf-lmx2594-sysrefFri, 12 Jun 2026 11:30:00 GMT91561404-af28-475a-b96b-cb6cbaadd097:15a8f6e5-0a8a-4e9d-b0f8-f1faae661df4bian haiboPart Number: ADC12DJ5200RF Other Parts Discussed in Thread: LMX2594 , , LMK00334 TI工程师们好： 我目前正在评估采用ADC12DJ5200RF和LMX2594做一个实现同步应用功能的项目，采用LMX2594给ADC12DJ5200RF提供CLK和SYSREF信号，SYSREF需要使用单脉冲的工作方式，在我看来，单脉冲模式SYSREF的连接打算采用DC耦合，LMX2594芯片的SYSREF输出是要3.3V上拉50欧，这里就有个问题是SYSREF采用DC连接，会不会导致ADC12DJ5200RF芯片SYSREF引脚电压击穿(ADC12DJ5200RF的SYSREF共模电压是1.1V)？如果这样连接不行的话，针对单脉冲的模式，SYSREF的连接这块有什么好的其它方案？ 谢谢！测试和测量lmx2594LMK00334ADC12DJ5200RFhttps://e2echina.ti.com/support/data-converters/f/data-converters-forum/1078839/ads1299-ads1299/3884966Fri, 12 Jun 2026 00:27:00 GMT91561404-af28-475a-b96b-cb6cbaadd097:fefc7dcd-fee1-4999-8591-970ef7bfd42dVivian Gao下方链接有过回复 Tying them to AVDD to eliminate any parasitic power draw would be best. ADS1299-4: Unused pin clarification - Data converters forum - Data converters - TI E2E support forumshttps://e2echina.ti.com/support/data-converters/f/data-converters-forum/1078845/dac7612-how-to-distinguish-dac7612u-from-dac7612ub-during-application/3884964Thu, 11 Jun 2026 23:59:00 GMT91561404-af28-475a-b96b-cb6cbaadd097:c3f7bc11-b44e-42f4-b172-4e8086fa6c1dTaylor看到您已经在英文论坛发帖，请等待工程师的回复。https://e2echina.ti.com/support/data-converters/f/data-converters-forum/1078845/dac7612-how-to-distinguish-dac7612u-from-dac7612ub-during-application/3884963Thu, 11 Jun 2026 23:28:00 GMT91561404-af28-475a-b96b-cb6cbaadd097:e20c0daa-ce4b-42b1-8592-6249383aeacdTaylor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。https://e2echina.ti.com/support/data-converters/f/data-converters-forum/1078843/dac7612-how-to-distinguish-dac7612u-from-dac7612ub-during-application/3884112Thu, 11 Jun 2026 09:15:00 GMT91561404-af28-475a-b96b-cb6cbaadd097:57248444-08e3-4b59-9c18-4c614a2c7297AliceHello, Since DAC7612 is very old chip from BURR-BROWN, regarding all part marking database, DAC7612U and DAC7612UB share a same part marking "DAC7612U", I think the only way to identify them is buying from TI official channel without further resource to provide. A newer version product such as DAC60502 and DAC63002 are recommended if the customer is in a new design.https://e2echina.ti.com/support/data-converters/f/data-converters-forum/1078845/dac7612-how-to-distinguish-dac7612u-from-dac7612ub-during-applicationThu, 11 Jun 2026 09:14:00 GMT91561404-af28-475a-b96b-cb6cbaadd097:4b65d68d-7127-429d-8f94-254b082adbdaAndy WuPart Number: DAC7612 We are facing an issue: how to quickly tell whether DAC7612U or DAC7612UB is mounted on our products. Our end customers have questioned how we can confirm that DAC7612UB, rather than DAC7612U, is used on the units. According to the datasheet, the two components carry identical part marking, making them indistinguishable by visual inspection alone。 dac7612.pdfDAC7612https://e2echina.ti.com/support/data-converters/f/data-converters-forum/1078843/dac7612-how-to-distinguish-dac7612u-from-dac7612ub-during-applicationThu, 11 Jun 2026 09:12:00 GMT91561404-af28-475a-b96b-cb6cbaadd097:f7fe0b2c-0197-421e-8352-fa2b3d3e7481Andy WuPart Number: DAC7612 We are facing an issue: how to quickly tell whether DAC7612U or DAC7612UB is mounted on our products. Our end customers have questioned how we can confirm that DAC7612UB, rather than DAC7612U, is used on the units. According to the datasheet, the two components carry identical part marking, making them indistinguishable by visual inspection alone。 dac7612.pdfDAC63002DAC7612DAC60502https://e2echina.ti.com/support/data-converters/f/data-converters-forum/1078838/ads1299eegfe-pdk-ads1299/3884099Thu, 11 Jun 2026 07:51:00 GMT91561404-af28-475a-b96b-cb6cbaadd097:68d14178-4187-4eb8-90bf-9519bfa3b05eFRANK1Connect unused analog inputs directly to AVDD.https://e2echina.ti.com/support/data-converters/f/data-converters-forum/1078839/ads1299-ads1299Thu, 11 Jun 2026 07:50:00 GMT91561404-af28-475a-b96b-cb6cbaadd097:7ab3110f-5ebc-490a-8149-e1c7c02ffd5aYi PengPart Number: ADS1299 我现在是用ADS1299的前四个通道，剩余四个通道悬空可行吗？还是每组通道 内部短接 ： IN5P↔IN5N 、 IN6P↔IN6N 、 IN7P↔IN7N 、 IN8P↔IN8N 所有短接点 统一接模拟地 AGND（0V）或者接电源。ads1299ADS1299-4便携式电子产品https://e2echina.ti.com/support/data-converters/f/data-converters-forum/1078838/ads1299eegfe-pdk-ads1299/3884098Thu, 11 Jun 2026 07:48:00 GMT91561404-af28-475a-b96b-cb6cbaadd097:334add02-3ae1-4f36-b9ea-13df8e35363fFRANK1感谢您对TI产品的关注！ 关于你的咨询，我们正在确认您的问题，感谢您的耐心等待。https://e2echina.ti.com/support/data-converters/f/data-converters-forum/1078838/ads1299eegfe-pdk-ads1299Thu, 11 Jun 2026 07:45:00 GMT91561404-af28-475a-b96b-cb6cbaadd097:05561e46-e575-42f0-bb45-7f29b0f4dd17Yi PengPart Number: ADS1299EEGFE-PDK Other Parts Discussed in Thread: ADS1299 我现在是用ADS1299的前四个通道，剩余四个通道悬空可行吗？还是每组通道 内部短接 ： IN5P↔IN5N 、 IN6P↔IN6N 、 IN7P↔IN7N 、 IN8P↔IN8N 所有短接点 统一接模拟地 AGND（0V）或者接电源。ads1299ADS1299EEGFE-PDK便携式电子产品https://e2echina.ti.com/support/data-converters/f/data-converters-forum/1078834/ads1299-ads1299-bias/3884095Thu, 11 Jun 2026 07:33:00 GMT91561404-af28-475a-b96b-cb6cbaadd097:1f494db5-bafd-4358-9516-e38f06eaa7ccFRANK1主设备的 BIASOUT 连接至从设备的 BIASIN，确保多设备共享同一偏置参考电压。https://e2echina.ti.com/support/data-converters/f/data-converters-forum/1078834/ads1299-ads1299-bias/3884086Thu, 11 Jun 2026 06:35:00 GMT91561404-af28-475a-b96b-cb6cbaadd097:d0b13300-93d2-4523-a8ce-0aaa9a915c95wang wang这张图我看了，BIASIN作为输入到MUX的偏置，它的连接方式应该是怎样的？