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Hot!Current consumption of the RN4020 not accurate in datasheet?

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DavidR93
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2019/06/06 00:28:44 (permalink)
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Current consumption of the RN4020 not accurate in datasheet?

Hi guys,
 
I am confused with the current consumption estimates given in the RN4020 datasheet. 
The datasheet says that the module alone consumes around 17.6mA at default TX power (-2.5dBm), and 33.6mA at maximum TX power (7.5dBm), both @ 3.3Volts. 
My circuit consists of a sensor, a PIC microcontroller and the RN4020 module. 
When I measure the current with all the components together while transmitting I get the following:
   9.01mA @TX power = -2.5dBm, and
   9.21mA @TX power = 7.5dBm.
I know my sensor is using around 5mA and the micro-controller is using another 0.5mA.
 
So my RN4020 is using only 3.51mA at default power and 3.71mA at maximum power, which seems quite odd considering the values given on the datasheet. Also, the difference between the two settings is not that big as detailed on the datasheet (almost double!). 
 
What current consumption is everyone else getting? Was there a mistake in the datasheet or they tested using different setup? 
 
Cheers,
 
David
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