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CC1200: Increase current consumption at low temperature

Wayne Jeong97575
Intellectual 685 points

Part Number: CC1200
Other Parts Discussed in Thread: MSP430F5419A,

Hello

I am using CC1200 for data communication on the watt-hour meter and host MCU is MSP430F5419A but I have an issue for current consumption at low temperature
Normally, My board`s stanby current is 20uA in room temperature but at low temperature 1mA increase.
Incase of POWER_DOWN mode, if 1mA increase below 0℃ and incase of eWOR mode, 1mA 1mA increase below -5℃

1. When the current is 1 mA at low temperature changing the temperature to room temperature will reduce the current to 20 uA.
2. When the current is 1 mA at low temperature, cut off the CC1200 of power will reduce the current 20uA.
3. Current consumtion increase after RF on in both case.

Please let me know check point.

Thank you.

  • 0
    TI__Guru**** 317180 points
    Is the SO (GPIO1) pin defined in all states? This pin is shared between the SPI interface and GPIO1. When CC1200 is in sleep this pin is an IO and the default state for this is thistate meaning that the pin is floating. I would suspect this pin start to drift away from a logic '0' or '1' when the temperature goes down and then the MSP will start drawing more current. Try to set GPIO1 to a value that is defined in sleep.