User Manual

ThingMagic Nano User Guide 11
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Power Consumption vs. DC Voltage and RF Output Level
NOTE: Power consumption is defined for operation into a 17 dB return loss load (VSWR of 1.33) or
better. Power consumption may increase, up to 4 W, during operation into return losses worse
than 17 dB and high ambient temperatures. Power consumption will also vary based on which of
the Supported Regions is in use.
Power Supply Ripple
The following are the minimum requirements to avoid module damage and to insure performance and
regulatory specifications are met. Certain local regulatory specifications may require tighter specifications.
• 3.3 to 5.5 VDC
• Less than 25 mV pk-pk ripple all frequencies,
• Less than 11 mV pk-pk ripple for frequencies less than 100 kHz,
• No spectral spike greater than 5 mV pk-pk in any 1 kHz band.
The switching frequency of the power supply must be 500 kHz or above to avoid this frequency from being
conducted or radiated into the module and degrading the receive sensitivity.
Idle DC Power Consumption
When not actively transmitting, the ThingMagic Nano module falls back into one of 3 idle states, called
“power modes”. There are 5 enumerated idle power modes defined in the API, but the Nano module only
supports 3 options, so three of the settings behave identically. Each successive power mode turns off more