User's Manual

Module SRF310
U098.0.00-SRF310 User Manual
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Figure 4. SRF310 installed in a typical host application.
3.0 SRF310 Tune-up Procedure
There is no tune-up procedure. The module contains no adjustable components.
Proper RF operation of the module is verified during the manufacturing process using
suitable equipment and methods. Limitation of conducted peak RF power and duty cycle is
controlled by proprietary firmware that may not be modified by an end user.
4.0 SRF310 Electrical Characteristics
4.1 Supply Voltage and Current
The SRF310 RTM (the components under the RF shield) requires the host application to provide a
low noise (linear regulator as opposed to a switching regulator) regulated 3.0-3.3 VDC source that
can provide 20mA without losing regulation. The RTM does not provide under-voltage, over-voltage,
or reverse polarity protection so use caution when applying power. The RTM contains a low noise
linear 2.5V regulator (Fig 1.”U2”, top-center) that buffers the analog power to the RFIC RF section.
The RFIC has another internal low noise 1.8V regulator (see the data sheet for Atmel AT86RF212B).
All external connection points designate as signal “GND” should be connected to the host
application “GND” circuit so as to maintain as low a resistive and reactive impedance as
practical. The PCB hosting the RTM should be fabricated with low impedance copper floods that
connect to “GND”. The grounded copper area around the RTM must extend at least 8mm on all
sides of the RTM.
The SRF310 RTM can safely operate with a supply voltage over the range of 3.0-3.3V with
minimal changes in RF performance. Testing was performed at 3.3V, the preferred supply
voltage.