User Manual

ThingMagic Nano User Guide 12
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of the module’s circuits, which must be restored when any command is executed, imposing a slight delay.
The following table gives the power consumption levels and the delay to respond to a command for each.
See Idle DC Power Consumption for details.
These nominal values should be used to calculate metrics such as battery life. To determine the
absolute maximum DC power that would be required under any condition, consider temperature,
channel of operation, and antenna return loss
.
RF Characteristics
RF Output Power
The output power may be set to a separate value for read and write operations (for many tags, more power
is required to write than read). The range of values for both settings is from 0 dBm to +27 dBm, in 0.01 dB
increments. For example, 27 dBm will be configured as “2700” in units of centi-dBm. The modules are
calibrated when they are manufactured in 0.5 dB increments and linear interpolation is used to set values
with greater granularity than this.
The granularity of the RF output power setting should not be confused with its accuracy. The accuracy of
the output level is specified to be +/- 1 dBm for each regional setting. Additional variation may be
experienced if the DC input Voltage and temperature changes while the module is operational.
This chart shows the typical transmit output variation over frequency. The typical variation is less than +/-
0.5 dBm for all transmit levels, across the entire frequency band.
ThingMagic Nano Power Consumption
Operation
DC Power Consumed at 5
VDC
Time to Respond to a Read
Command
Power Mode = “FULL” 0.85 W Less than 5 msec.
Power Mode = “MINSAVE”,
“MEDSAVE”, or “MAXSAVE”
0.04 W Less than 20 msec.
Power Mode = “SLEEP” 0.02 W Less than 20 msec.
ENABLE Line disabled .00015 W Module reboots when
Enable line brought high