• State TI Thinks Resolved
  • Locked Locked
  • Replies 1 reply
  • Answers 1 answer
  • Subscribers 31 subscribers
  • Views 204 views
  • Users 0 members are here
Support feedback
Options
Options
Similar topics

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

LMP91051: Can the lmp91051 chip switch channels internally?

Tonyx.wu
Genius 3245 points
Part Number: LMP91051

Can the lmp91051 chip switch channels internally? Because two inputs, one input, can't collect two signals of the sensor at the same time. How can I switch the in1 pair of outputs and then switch the in2 pair of outputs? How to set it if you can?

  • 0
    TI__Guru* 91206 points

    Dear Tonyx.wu - 

    For switching between the channels, the input multiplexer (mux) would be utilized. This is controlled by bit 7 of the Device Configuration Register, where IN1 is default (0b) and IN2 would be selected by setting this bit to 1b. The description of such a system starts on page 18 of the datasheet and the sensor used in the example is an IRC-AT dual channel thermopile detector, from Alphasense. This kind of system is also described in this application note https://www.ti.com/lit/an/snaa207/snaa207.pdf, in section 5, which starts on page 4.