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  • RE: 运算放大器偶次谐波失真问题？

    为了确定是不是我PCB布局布线的问题，我买了TI的DEM-OPA-SO-1A评估板。 焊上了OPA820,RF=470Ω,RG=27Ω。 下面是测试的波形图，使用+-5V供电 1M加负载频谱： 1M加负载波形： 1M未加负载频谱： 10M加负载频谱： 10M加负载波形： 10M未加负载频谱： 可以看到测试结果就是，也出现了偶次谐波失真，无论是否加负载（负载影响失真的大小）。
    • Answered

  • 用OPA690实现负电阻

    已解决
    Other Parts Discussed in Thread: OPA690 , DEM-OPA-SO-1A 工程师您好：我用OPA690实现了一个负电阻电路，在没有任何输入的情况下，给负电阻电路提供正负5V的供电电压，发现输出端的电压一会是3.773V，一会又变为-3.821V，这是什么原因呢？ 在电路中反馈电阻R=46Ω，
    • 负电阻电路.tif
    • Answered

  • OPA657: Oscillation and DC Bias Issues

    已解决
    Part Number: OPA657 Other Parts Discussed in Thread: DEM-OPA-SOT-1A , Dear all, here is my schematic my PCB design is close to DEM-OPA-SOT-1A Input is a photomultiplier tube . its parasite capacitance i estimate is 20-30pF ,and so i choose C5=0.25pF. …
    • Answered

  • [参考译文] OPA2670：用于 OPA2670或 OPA2673的评估板

    已解决
    Other Parts Discussed in Thread: OPA2670 , OPA2673 , DEM-OPA-RGV-EVM 请注意，本文内容源自机器翻译，可能存在语法或其它翻译错误，仅供参考。如需获取准确内容，请参阅链接中的英语原文或自行翻译。 https://e2e.ti.com/support/amplifiers-group/amplifiers/f/amplifiers-forum/1295056/opa2670-evaluation-board-for-opa2670-or-op…

  • OPA2277: Inquiry Regarding Die Variation Between Two Lots of OPA2277U

    Part Number: OPA2277 Dear TI Support Team, We have received two separate lots of the OPA2277U (SOIC-8, orderable device OPA2277U/2K5) and performed X-ray inspection on both. The images reveal a noticeable difference in the appearance of the silicon die inside the packages. Could you please c…

  • OPA2277: Inquiry Regarding Die Variation Between Two Lots of OPA2277U

    TI 认为已经解决
    Part Number: OPA2277 Dear TI Support Team, We have received two separate lots of the OPA2277U (SOIC-8, orderable device OPA2277U/2K5) and performed X-ray inspection on both. The images reveal a noticeable difference in the appearance of the silicon die inside the packages. Could you please …

  • [参考译文] OPA3693：差分 ap 应用布局

    Other Parts Discussed in Thread: OPA3693 , DEM-OPA-SSOP-3E , DEM-OPA-SSOP-3D , DEM-OPA-SSOP-3A 请注意，本文内容源自机器翻译，可能存在语法或其它翻译错误，仅供参考。如需获取准确内容，请参阅链接中的英语原文或自行翻译。 https://e2e.ti.com/support/amplifiers-group/amplifiers/f/amplifiers-forum/965416/opa3693-differential…
    • Answered

  • [参考译文] DEM-FDA-SOIC-EVM：UA78L10ACD_REG PLUS10V 0.1A 5% SOIC8

    已解决
    请注意，本文内容源自机器翻译，可能存在语法或其它翻译错误，仅供参考。如需获取准确内容，请参阅链接中的英语原文或自行翻译。 https://e2e.ti.com/support/amplifiers-group/amplifiers/f/amplifiers-forum/1385658/dem-fda-soic-evm-ua78l10acd_reg-plus10v-0-1a-5-soic8 器件型号： DEM-FDA-SOIC-EVM 工具与软件： 请分享以下必需的详细信息。 美国 否 MFR…
    • Answered

  • [参考译文] OPA820：高电流输出(46mA)上升沿压摆率

    已解决
    Other Parts Discussed in Thread: TINA-TI , DEM-OPA-SOT-1A , OPA820 请注意，本文内容源自机器翻译，可能存在语法或其它翻译错误，仅供参考。如需获取准确内容，请参阅链接中的英语原文或自行翻译。 https://e2e.ti.com/support/amplifiers-group/amplifiers/f/amplifiers-forum/872878/opa820-high-current-output-46ma-rising-edge-slew…

  • RE: TIDA-01606: TMS320F28379D_LAB5

    您好 I'm not clear on which HW version you have. I assume it's rev E6 because of the OPA part number you mentioned. Was this HW from TI or did the customer build their own? You mentioned that the customer measured the op amp output with an oscilloscope…

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