• RE: LTC2991 I2C VIH ?

    Greetings Albert,

       I looked into it a bit more, and the the VIH and VIL levels are indeed determined by the LTC2991 VCC.

    If the I2C bus is at 3.3V and the LTC2991 is powered at 5V VCC, then 3.3V is less than 5V * 0.7 = 3.5V.

    The VIL would be OK if driven…

  • LTC2991的应用问题

    如下三个问题需要答复:

    1、采样电阻的选取标准问题(数据手册上对采用电阻选取的描述存在前后矛盾)

    1.1文档建议按如下描述选取

    1.2而后面给的典型应用没有按这个规则选(此处选的是0.01,而不是0.03)

    疑问:采用电阻是按什么方法选取的??

    2、电流的计算

    如下图中 15.54mA/LSB 是怎么计算出来的,我计算的值是15.26mA/LSB=19.075/0.01*8

    3、选用LTC2991采集电流(12V供电)的应用时,对分压电阻的选择,以及PCB layout有什么注意事项吗…

  • ltc2991 error detection

    Are there any build-in error detection for the ltc2991? Say if I send the wrong memory location or if the connection is not successful through I2C, is there any way I can know that? 

    (My master will be FPGA)

  • LTC2991 Current Measurement Problem

    Hello;

    I am trying to read motor arm currents using the LTC2991 IC. But I have encountered some problems as follows:

    I can read the battery voltages in single-ended mode. However, I always have an offset value when reading currents in differential mode…

  • ltc2991 not sending back data

    I am trying to read data from ltc2991 sensor through i2c. My master sends the slave address 0x90 (write), 0x91 (read) and trying to read data from memory location 0x0B. 

    I have received ACKs from the slave, however, it always reads 0x00 for the data. 

  • ltc2991 with Spartan-6 (FPGA)

    I'm wondering if anyone has tried to integrate the ltc2991 to FPGA. (I am planning to read only the temperature from the sensor and my master will be Spartan 6)

    I know it is communicated through I2C, however I have no experience with I2C on Verilog…

  • LTC2991 current measurement with voltage divider

    Hi,

    I am studying the following voltage divider circle in LTC2991 for current measurement. I have a question for the current measurement LSB value. Appreciate any advice.

    As I understand, the voltage divider will divide differential voltage in 0.01 ohm…

  • LTC2991 Octal I2C Voltage, Current, and Temperature Monitor : Detecting Diode faults

    Hello,

    I am working on the firmare for a system that uses the LTC2991 for temperature measurement.  I am adding support for detecting remote diode faults (open, short, reverse fitting).

    The sense diodes are connected to V1 and V7, so I should be able to…

  • RE: LTM4644 Onboard Temperature Diode ( TEMP pin) acquisition

    Hi Sergio,

    The LTC2991 can be used with the TEMP diode of the LTM4644 to monitor the voltage to determine the on board temperature. Page 16 of the LTM4644 datasheet gives a thorough description of the relationship between the diode voltage and the temperature…

  • RE: LTC4215 & QuikEval

    Hi Stuart,

        QuikEval is a launcher for other demo programs. It identifies which program to launch by reading the ID EEPROM on the demo board. Each executable stands alone, and can be launched manually by simply clicking it in the Windows file manager…