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RFM217W Schematic ( PDF Datasheet ) - HOPERF

Teilenummer RFM217W
Beschreibung low-cost OOK stand-alone RF receiver
Hersteller HOPERF
Logo HOPERF Logo 




Gesamt 21 Seiten
RFM217W Datasheet, Funktion
 
Features
„ Embedded EEPROM
y Very Easy Development with RFPDK
y All Features Programmable
„ Frequency Range:
y 300 to 480 MHz (RFM210W)
y 300 to 960 MHz (RFM217W)
„ Symbol Rate: 0.1 to 40 kbps
„ Sensitivity: -108 dBm at 1 kbps, 0.1% BER
„ Configurable Receiver Bandwidth: 50 to 500 kHz
„ 3-wire SPI Interface for EEPROM Programming
„ Stand-Alone, No External MCU Control Required
„ Configurable Duty-Cycle Operation Mode
„ Supply Voltage: 1.8 to 3.6 V
„ Low Power Consumption: 3.8 mA
„ Low Sleep Current
y 60 nA when Sleep Timer Off
y 440 nA when Sleep Timer On
„ RoHS Compliant
„ Module Size:32*11*5.0mm
RFM210WW/RFM217W
RFM210W/RFM217W
Descriptions
The RFM210W/RFM217W devices are ultra low power,
high performance, low-cost OOK stand-alone RF
receiver for various 300 to 960 MHz wireless applications.
The RFM210WA covers the frequency range from 300 to
480
MHz while the RFM217W covers the 300 to 960 MHz
frequency range. They are part of the CMOSTEK
NextGenRFTM family, which includes a complete line of
transmitters, receivers and transceivers. An embedded
EEPROM allows the frequency, symbol rate and other
features to be programmed into the device using the
CMOSTEK USB Programmer and RFPDK. Alternatively, in
stock products of 433.92/868.35 MHz are available for
immediate demands without the need of EEPROM
programming. When the RFM210W/217 is always on,
it
consumes only 3.8 mA current while achieving -108 dBm
receiving sensitivity. It consumes even less power when
working in duty-cycle operation mode via the built-in sleep
timer. The RFM210W/RFM217W receiver together with the
RFM11x transmitter enables an ultra low cost RF link.
Applications
„ Low-Cost Consumer Electronics Applications
„ Home and Building Automation
„ Infrared Receiver Replacements
„ Industrial Monitoring and Controls
„ Remote AutomateQdFMNe16te(r3RX3e)ading
„ Remote Lighting Control System
„ Wireless Alarm and Security Systems
„ Remote Keyless Entry (RKE)
 
12 11 10 9
GND 13
RFIN 14
GND 15
VDD 16
8 XIN
7 XOUT
6 CLKO
5 DOUT
`
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RFM217W Datasheet, Funktion
 
1.4 Crystal Oscillator
RFM210W/RFM217W
Table 6. Crystal Oscillator Specifications
Parameter 
Symbol 
conditions 
min  typ  max 
unit 
Crystal Frequency[1] 
 FXTAL
 
26  26  26 
MHz 
Crystal Tolerance[2] 
 
 
  ±20   
ppm 
Load Capacitance 
Crystal ESR 
 CLOAD
Rm 
 
 
10  15  20 
    60 
pF 
 
XTAL Startup Time[3] 
 tXTAL
 
  400   
us 
Drive Level 
 
      100  uw 
Aging Per Year 
 
 
  ±2   
ppm 
Notes:
[1]. The RFM210WRFM217W can directly work with external 26 MHz reference clock input to XIN pin (a coupling
capacitor is required)with peak-to-peak amplitude of 0.3 to 0.7 V.
[2]. This is the total tolerance including (1) initial tolerance, (2) crystal loading, (3) aging, and (4) temperature
dependence.The acceptable crystal tolerance depends on RF frequency and channel spacing/bandwidth.
[3]. This parameter is to a large degree crystal dependent. 
1.5 LPOSC
Table 7. LPOSC Specifications
Parameter
Symbol
Conditions
Min
Typ
Max
Unit
Calibrated Frequency[1]
FLPOSC
1 kHz
Frequency Accuracy
After calibration
1%
Temperature Coefficient[2]
-0.02
%/°C
Supply Voltage Coefficient[3]
+0.5
%/V
Initial Calibration Time
tLPOSC-CAL
4 ms
Notes:
[1]. The LPOSC is automatically calibrated to the crystal oscillator during the PUP state, and is periodically calibrated since
then.
[2]. Frequency drifts when temperature changes after calibration.
[3]. Frequency drifts when supply voltage changes after calibration.
 
 
 
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6 Page









RFM217W pdf, datenblatt
RFM210W/RFM217W
 
Table 10. Modulation, Frequency and Symbol Rate
Parameter
Demodulation
Frequency (RFM210W)
Frequency (RFM217W)
Frequency Resolution
Symbol Rate
Value
OOK
300 to 480
300 to 960
24.8
0.1 to 40
Unit
-
MHz
MHz
Hz
ksps
5.3 Embedded EEPROM and RFPDK
The RFPDK is a PC application developed to help the user to configure the CMOSTEK NextGenRFTM products in the most
intuitional way. The user only needs to connect the USB Programmer between the PC and the device, fill in/select the proper
value of each parameter on the RFPDK, and click the “Burn” button to program the configurations into the device. The
configurations of the device will then remain unchanged until the next programming. No external MCU control is required in the
application program.
The RFPDK also allows the user to save the active configuration into a list by clicking on the “List” button, so that the saved
configuration can be directly reloaded from the list in the future. Furthermore, it supports exporting the configuration into a
hexadecimal file by clicking on the “Export” button. This file can be used to burn the same configuration into a large amount of
devices during the mass production. See the figure below for the accessing of the EEPROM.
RFM210W/21
7
EEPROM
RFPDK
Interface
CSB
SCL
SDA
CMOSTEK USB
Programmer
Figure 11. Accessing Embedded EEPROM
For more details of the CMOSTEK USB Programmer and the RFPDK, please refer to “AN103 CMT211xA-221xA One-Way RF
Link Development Kits Users Guide”.
5.4 All Configurable Options
Beside the demodulation, frequency and symbol rate, more options can be used to customize the device. The following is a table
of all the configurable options. On the RFPDK, the Basic Mode only contains a few options allowing the user to perform easy and
fast configurations. The Advanced Mode shows all the options that allow the user to customize the device in a deeper level. The
options in “Basic Mode” are a subset of that in the “Advanced Mode”.
 
 
 
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