VL53L1X - i2c consumption

[Alskandar]

Hello,

How do I deactivate/activate a SDA/SCL line?

I perform a test on an Icarus board with a VL53L1X sensor, everything works fine.
However, in idle/sleep mode, whether I turn off the sensor or not (by XSHUT, GPIO or physically), it consumes an additional 10uA. 
Even without code to initialize the sensor, and only plugging in the SDA & SCL ports, I have a 10uA boost. 
I don't understand where this is coming from or how to fix it. 

Does someone have an idea ?

Thanks !

[ivnn]

Hi,
try to configure gpio pins to tri-state, which could be done with nrf_gpio_cfg_default(pin)

[Alskandar]

Hi,
I'm with an nRF9160.
I tried like this, without success.

That is to say that the ports are at 0V but no reduction in consumption. 
Worse when I reactivate the port, it rises above 1.5mA.

pins_vl53L1X = device_get_binding("GPIO_0");
gpio_pin_configure(pins_vl53L1X, 26, GPIO_OUTPUT);
gpio_pin_configure(pins_vl53L1X, 27, GPIO_OUTPUT);
gpio_pin_set(pins_vl53L1X, 26, 0);
gpio_pin_set(pins_vl53L1X, 27, 0);

[Øyvind]

Hello, 

Looking at the datasheet of the sensor itself, it looks like the sensor has a leakage current of 10µA when AVDD is 0V. How are you measuring the current consumption?

Kind regards,
Øyvind

[Alskandar]

Hi,

Yes i saw it too but i don't know how to use this information.

Should i mount an auxiliary system with a resistor to block state ?

For current measurement, i use an Otii Arc (on Vbat & GND with Icarus Board) (like SMU mode with nRF9160-DK).

Thanks

[ivnn]

Pls, provide a simplified schematic of your setup this might help us to guide you

[Alskandar]

Here is the diagram of Icarus board with VL53L1X sensor (connected in i2c on 26 & 27, 3V3 & GND).

Without sensor connected, i have a consumption near 33uA

With sensor connected, all connected (GND, 3V3 & i2c) or even with just i2c (without 3V3 & GND), i have a consumption near 45uA

[ivnn]

Onboard, FTDI UART Bridge could take this current. Try to add power directly to 3.3V pin