RFM210LW Datasheet, PDF (11/17 Pages) List of Unclassifed Manufacturers – Low-Cost Consumer Electronics Applications

RFM210LW
Table 7. Modulation, Frequency and Symbol Rate
Parameter
Demodulation
Frequency
Frequency Resolution
Symbol Rate
Value
OOK
300 to 480
24.8
0.1 to 3.4
Unit
-
MHz
Hz
kbps
5.3 Main Configurations
Unlike other NextGenRF^TM receivers, the RFM210LW does not need any register control or manufacturing programming. The
configuration of the device is fixed in order to save the development effort, reduce system cost and simplify the manufacturing
process. The main configurations are listed in the table below. Please note that if more flexibility is needed in the system, the user
can use other NextGenRF^TM receivers like CMT2210A and etc. For those products, an embedded EEPROM is available on chip
for the user to configure all the product features.
5.4 Internal Blocks Description
5.4.1 RF Front-end and AGC
The RFM210LW features a low-IF receiver. The RF front-end of the receiver consists of a Low Noise Amplifier (LNA), I/Q
mixer and a wide-band power detector. Only a low-cost inductor and a capacitor are required for matching the LNA to any 50
Ω antennas. The input RF signal induced on the antenna is amplified and down-converted to the IF frequency for further
processing.
By means of the wide-band power detector and the attenuation networks built around the LNA, the Automatic Gain Control (AGC)
loop regulates the RF front-end’s gain to get the best system linearity, selectivity and sensitivity performance, even though the
receiver suffers from strong out-of-band interference.
5.4.2 IF Filter
The signals coming from the RF front-end are filtered by the fully integrated 3^rd-order band-pass image rejection IF filter which
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