• 关于LTC2945的问题

    我们最近在用LTC2945监测设备输出的电压和电流,但是使用过程中会出现INTVCC引脚对地击穿的现象,或者SDAO对地阻抗变低,导致I2C总线SDA持续拉低,整条总线都不能用的现象。

    LTC2945的供电是用稳压模块输出的+26V供电,INTVCC只是为后面的光耦供电,请教一下,什么情况下INTVCC或者SDAO才会对地击穿。

    电路是用的手册里推荐的电路,VDD供电是用的+26V,SDAI和SCL的上拉也是用的26V,而且是稳压模块输出的,INTVCC的电压波形也抓过,没用任何的过冲电压,为什么INTVCC会击穿…

  • LTC2945 communicate problem in reading

    Hi,
    My schematic is simple as shown in datasheet, the VDD and INTVCC is powered by 3.3V.

    The master communicated with the slave by using the common Mass Writeaddress (1100 110b).
    When I read the REGISTER ADDRESS(02h) as figure 10, after the S(start), the…

  • Full scale voltage read when reading continuously from LTC2945 power monitor

    Hi,

    We are using LTC2945 to monitor voltage ,current and power from a few sources.

    We need to continuously monitor the current ,voltage and power from four sources.

    We are using the in-built ltc2945 which come with the kernel. We use kernel version 4…

  • LTC2945 communication problem

    Hi,

    My schematic is simple as shown in datasheet:

    The ADIN is grounded as not used. 

    ADR1 and ADR0 are connected to ground. So, device address should be 0xDE.

    However I dont get any ACK when shifting address as below:

    Any idea would be welcomed…

  • 关于LTC2945的时序问题

    我按照LTC2945datasheet上的读说明,做的FPGA时序,这个是用signal tap 抓的仿真波形,可以看到,在写入设备地址(通用地址)和寄存器地址(command)时,LTC2945都进行了应答,但是在重新开始,再一次写入设备地址(通用地址)后,LTC2945不在应答。谁知道怎么回事吗?不胜感激!

  • LTC2946/LTC2945

    My application is to use the LTC 2946 in a serial connected string of batteries to measure total string current and voltage appliyng it in two distinct design:
    One for -48V as commoly used in telecom industry, and another one to be used to read from +4…

  • 关于LTC2945的问题

    最近研究LTC2945,搭建了简易的测试电路,测试结果很怪异。

    Vad 计算后显示 0.5mV/LSB
    表 mV   mA CODE
    0 8 00FF
    8 16 01FF
    18.7 32 03FF
  • LTC2945 EVB issue with software QuikEval

    Hello,

    I tested the LTC2945 EVB ( DC1697A ) with the controller board ( DC590B ). I  executed the software QuikEval ( Version K114) after plungging the DC590B into PC( Windows 7 system ). I apply the "Run" button and the error message is occured as below…

  • LTC2945 supply setup for negative voltages

    I have several negative supply voltages I need to monitor (-2V, -5V, and -30V).

    Looking at the block diagram (p. 9)... if I'm connecting the negative supply to the GND pin, am I correct in assuming I'll need optical isolators for I2C in all cases since…

  • RE: LTC6115 amplifier A1 supply voltage question

    Hi ote,

    Unfortunately, you can't operate A1 from a different supply than what is being measured. This part is meant to be used as high-side current sense, where input common mode is very close to the supply. It can't also  sense current at 0V supply…