User's Guide

Review Copy 11-6-10
ThingMagic Micro Family Guide
7
www.JADAKtech.com
Power Supply Ripple
The following are the minimum requirements to avoid module damage and ensure performance and
regulatory specifications are met. Certain local regulatory specifications may require tighter specifications.
• 3.5 to 5.25 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.
• Power supplies should have a switching frequency of 500 kHz or above to ensure that the switching
frequency does not fall within the receive baseband signal range, which is centered around 250 kHz.
Power Consumption
The following table defines the power consumption specifications for the Micro in various states of
operation. See Power Management for details.
Micro Power Consumption
Operation
RF Transmit
Power
Setting
(dBm)
Nominal DC
Power
1
(Watts)
Active Reader (RF On)
+30
5.5
+27
3.5
+23
2.5
+10
2.0
No Tag Reading (Micro idle)
Power Mode = FULL
n/a
0.325
No Tag Reading (Micro idle)
Power Mode = MINSAVE
n/a
0.06
No Tag Reading (Micro idle)
Power Mode = SLEEP
n/a
0.008
Shutdown Line enabled
n/a
0.0003
1
Power consumption is defined for TTL UART operation. Power consumption
may vary if the USB interface is connected. Power consumption is defined for
operation into a 17dB return loss load or better.
NOTE: These nominal values should be used to calculate metrics, such as battery life. Power
consumption may increase, up to 8W, during operation into return losses worse than 17dB and
high ambient temperatures. Power consumption will also vary based on Supported Regions in
use.