RFM70-S QUASAR, RFM70-S Datasheet - Page 3

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RFM70-S

Manufacturer Part Number
RFM70-S
Description
MODULE, TRANSCEIVER, SMD, 2.4GHZ
Manufacturer
QUASAR
Datasheet

Specifications of RFM70-S

Modulation Type
GFSK
Data Rate Max
2Mbps
Frequency Range
2.4GHz To 2.527GHz
Sensitivity
-85dBm
Supply Voltage Range
1.9V To 3.6V
Supply Current
23mA
Interface Type
SPI
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
1
RFM70 is a GFSK transceiver module
operating in the world wide ISM frequency
band at 2400 - 2483.5 MHz.
transmission and up to 2Mbps air data rate
make them suitable for applications requiring
ultra low power consumption.The embedded
packet processing engines enable their full
operation with a very simple MCU as a radio
system.Auto
acknowledge give reliable link without any
MCU interference.
RFM70 operates in TDD mode, either as a
transmitter or as a receiver.
The RF channel frequency determines the
center of the channel used by RFM70. The
frequency is set by the RF_CH register in
register bank 0 according to the following
formula: F0= 2400 + RF_CH (MHz). The
General Description
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re-transmission
Figure 1 RFM70 Chip Block Diagram
Burst mode
and
auto
resolution of the RF channel frequency is
1MHz.
A transmitter
programmed with the same RF channel
frequency to be able to communicate with
each other.
The output power of RFM70 is set by the
RF_PWR bits in the RF_SETUP register.
Demodulation is done with embedded data
slicer and bit recovery logic. The air data rate
can be programmed to 1Mbps or 2Mbps by
RF_DR register. A transmitter and a receiver
must be programmed with the same setting.
In the following chapters, all registers are in
register bank 0 except with explicit claim.
and a receiver must be
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RFM70
V1.0
3

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