RFM217W-915S1 [HOPERF]
Embedded EEPROM;
| 型号： | RFM217W-915S1 |
| 厂家： | 
HOPERF |
| 描述： | Embedded EEPROM 可编程只读存储器 电动程控只读存储器 电可擦编程只读存储器 |
| 文件： | 总21页 (文件大小：524K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
RFM210WW/RFM217W
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
RFM210W/RFM217W
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
Applications
Descriptions
The RFM210W/RFM217W devices are ultra low power,
high performance, low-cost OOK stand-alone RF
Low-Cost Consumer Electronics Applications
Home and Building Automation
receiver for various 300 to 960 MHz wireless applications.
The RFM210WA covers the frequency range from 300 to
480
Infrared Receiver Replacements
Industrial Monitoring and Controls
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
Remote Automated Meter Reading
Remote Lighting Control System
Wireless Alarm and Security Systems
Remote Keyless Entry (RKE)
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.
`
E‐mail:sales@hoperf.com
website://www.hoperf.com
RFM210W/RFM217W
Abbreviations
Rev 1.0 | Page 1 / 20
Abbreviations used in this data sheet are described below
AGC
Automatic Gain Control
Application Notes
Bit Error Rate
PC
Personal Computer AN
Printed Circuit Board BER
Phase Lock Loop
PCB
PLL
PN9
POR
PUP
QFN
BOM
BSC
Bill of Materials
Pseudorandom Noise 9
Power On Reset
Basic Spacing between Centers
Bandwidth
BW
Power Up
DC
Direct Current
Quad Flat No-lead
EEPROM
Electrically Erasable Programmable Read-Only RF
Radio Frequency
Memory
RFPDK
RF Products Development Kit
Restriction of Hazardous Substances
Received Signal Strength Indicator
Receiving, Receiver
Successive Approximation Register
Serial Port Interface
Threshold
ESD
ESR
Ext
Electro-Static Discharge
Equivalent Series Resistance
Extended
RoHS
RSSI
Rx
IF
Intermediate Frequency
Low Noise Amplifier
Local Oscillator
SAR
SPI
LNA
LO
TH
LPOSC
Max
MCU
Min
Low Power Oscillator
Maximum
Tx
Transmission, Transmitter
Typical
Typ
Microcontroller Unit
Minimum
USB
VCO
WOR
XOSC
Universal Serial Bus
Voltage Controlled Oscillator
Wake On Radio
MOQ
NP0
NC
Minimum Order Quantity
Negative-Positive-Zero
Not Connected
Crystal Oscillator
XTAL/Xtal
Crystal
OOK
On-Off Keying
E‐mail:sales@hoperf.com
website://www.hoperf.com
RFM210W/RFM217W
Table of Contents
1. Electrical Characteristics............................................................................................................................................ 4
1.1 Recommended Operation Conditions ................................................................................................................... 4
1.2 Absolute Maximum Ratings................................................................................................................................... 4
1.3 Receiver Specifications......................................................................................................................................... 5
1.4 Crystal Oscillator................................................................................................................................................... 6
1.5 LPOSC.................................................................................................................................................................. 6
2. Pin Descriptions .......................................................................................................................................................... 7
3. Typical Performance Characteristics......................................................................................................................... 8
4. Typical Application Schematic ................................................................................................................................... 9
5. Functional Descriptions............................................................................................................................................ 10
5.1 Overview............................................................................................................................................................. 10
5.2 Modulation, Frequency and Symbol Rate ........................................................................................................... 10
5.3 Embedded EEPROM and RFPDK ...................................................................................................................... 11
5.4 All Configurable Options ..................................................................................................................................... 11
5.5 Internal Blocks Description.................................................................................................................................. 13
5.5.1 RF Front-end and AGC............................................................................................................................ 13
5.5.2 IF Filter..................................................................................................................................................... 13
5.5.3 RSSI ........................................................................................................................................................ 13
5.5.4 SAR ADC................................................................................................................................................. 13
5.5.5 Crystal Oscillator...................................................................................................................................... 13
5.5.6 Frequency Synthesizer ............................................................................................................................ 13
5.5.7 LPOSC..................................................................................................................................................... 13
5.6 Operation Mode .................................................................................................................................................. 14
5.7 Always Receive Mode......................................................................................................................................... 14
5.8 Duty-Cycle Receive Mode................................................................................................................................... 16
5.9 Easy Duty-Cycle Configurations.......................................................................................................................... 17
6. Ordering Information................................................................................................................................................. 18
7. Package Outline......................................................................................................................................................... 19
8. Contact Information .................................................................................................................................................. 20
E‐mail:sales@hoperf.com
website://www.hoperf.com
Rev 1.0 | Page 3 / 20
RFM210W/RFM217W
1. Electrical Characteristics
VDD = 3.3 V, TOP = 25 ℃, FRF = 433.92 MHz, sensitivities are measured in receiving a PN9 sequence and matching to 50 Ω
impedance, with the BER of 0.1%. All measurements are performed using the board RFM210W/RFM217W-EM V1.0, unless
otherwise noted.
1.1 Recommended Operation Conditions
Table 3. Recommended Operation Conditions
Parameter
Symbol
Conditions
Min
Typ
Max
Unit
Operation Voltage Supply
Operation Temperature
VDD
TOP
1.8
-40
3.6
85
V
℃
Supply Voltage Slew Rate
1
mV/us
1.2 Absolute Maximum Ratings
Table 4. Absolute Maximum Ratings[1]
Conditions
Min
Parameter
Supply Voltage
Symbol
Max
Unit
VDD
VIN
-0.3
-0.3
-40
-50
3.6
V
Interface Voltage
VDD + 0.3
V
℃
Junction Temperature
Storage Temperature
Soldering Temperature
ESD Rating[2]
TJ
125
150
255
2
℃
℃
TSTG
TSDR
Lasts at least 30 seconds
Human Body Model (HBM)
-2
kV
@ 85 ℃
Latch-up Current
-100
100
mA
Notes:
[1]. Stresses above those listed as “absolute maximum ratings” may cause permanent damage to the device. This is a stress
rating only and functional operation of the device under these conditions is not implied. Exposure to maximum rating
conditions for extended periods may affect device reliability.
[2]. The RFM210W/RFM217W is high-performance RF integrated circuits with VCON/P pins having an ESD rating < 2 kV HBM.
Handling and assembly of this device should only be done at ESD-protected workstations.
Caution! ESD sensitive device. Precaution should be used when handling the device in order
to prevent permanent damage.
E‐mail:sales@hoperf.com
website://www.hoperf.com
Rev 1.0 | Page 4 / 20
RFM210W/RFM217W
1.3 Receiver Specifications
Table 5. Receiver Specifications
Parameter
Symbol
Conditions
Min
Typ
Max
Unit
RFM210W
RFM217W
300
300
0.1
480
960
40
MHz
MHz
ksps
Frequency Range
Symbol Rate
FRF
SR
FRF = 433.92 MHz, SR = 1 ksps, BER =
S433.92
-108
-108
10
dBm
dBm
dBm
0.1%
Sensitivity
FRF = 868.35 MHz, SR = 1 ksps, BER =
0.1%
S868.35
PLVL
IDD
Saturation Input Signal
Level
FRF = 433.92 MHz
3.8
5.2
mA
mA
nA
nA
Hz
Working Current
Sleep Current
FRF = 868.35 MHz
When sleep timer is on
When sleep timer is off
440
60
ISLEEP
FRES
Frequency Resolution
Frequency Synthesizer
Settle Time
24.8
TLOCK
From XOSC settled
150
52
us
dB
dB
SR = 1 ksps, ±1 MHz offset, CW
interference
SR = 1 ksps, ±2 MHz offset, CW
interference
Blocking Immunity
BI
74
SR = 1 ksps, ±10 MHz offset, CW
interference
75
35
dB
dB
Image Rejection Ratio
Input 3rd Order Intercept
Point
IMR
IIP3
IF = 280 kHz
Two tone test at 1 MHz and 2 MHz offset
frequency. Maximum system gain settings
-25
dBm
kHz
ms
Receiver Bandwidth
BW
50
500
From power up to receive, in Always
Receive Mode
Receiver Start-up Time
Receiver Wake-up Time
TSTART-UP
7.3
From sleep to receive, in Duty-Cycle
Receive Mode
TWAKE-UP
0.61
ms
E‐mail:sales@hoperf.com
website://www.hoperf.com
Rev 1.0 | Page 5 / 20
RFM210W/RFM217W
1.4 Crystal Oscillator
Table 6. Crystal Oscillator Specifications
Parameter
Symbol
conditions
min
typ
max
unit
Crystal Frequency[1]
FXTAL
26
26
26
MHz
Crystal Tolerance[2]
Load Capacitance
Crystal ESR
±20
ppm
pF
CLOAD
Rm
10
15
20
60
Ω
XTAL Startup Time[3]
Drive Level
tXTAL
400
us
100
uw
ppm
Aging Per Year
±2
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
Calibrated Frequency[1]
Frequency Accuracy
Temperature Coefficient[2]
Supply Voltage Coefficient[3]
Initial Calibration Time
Notes:
Symbol
Typ
1
Max
Unit
kHz
%
FLPOSC
After calibration
1
-0.02
+0.5
4
%/°C
%/V
ms
tLPOSC-CAL
[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.
E‐mail:sales@hoperf.com
website://www.hoperf.com
RFM210W/RFM217W
2. Pin Descriptions
Rev 1.0 | Page 6 / 20
Figure 2. Pin Diagram
Table 6. RFM210W/RFM217WPin Descriptions
Pin Number
Name
I/O
Descriptions
I
1
GND
Ground
O
I
Received data output
Power supply input
2
3
4
DATA
VDD
I
3-wire SPI clock input for EEPROM programming
CLK
3-wire SPI data input and output for EEPROM
programming
I/O
I
5
6
SDA
CSB
3-wire SPI chip select input for EEPROM
programming I
I
I
I
7
GND
ANT
GND
GND
Ground
8
RF signal input to the LNA
9
Ground
Ground
10
I
Rev 1.0 | Page 7 / 20
E‐mail:sales@hoperf.com
website://www.hoperf.com
RFM210W/RFM217W
3. Typical Performance Characteristics
Current vs. Supply Voltage
Current vs. Temperature
6.00
6.60
6.20
5.80
5.40
5.00
4.60
4.20
3.80
3.40
3.00
5.50
5.00
4.50
4.00
3.50
868.35MHz/3.6V
868.35MHz/3.3V
868.35MHz/1.8V
433.92MHz/3.6V
433.92MHz/3.3V
433.92MHz/1.8V
868.35 MHz
3.00
433.92 MHz
2.50
2.00
1.60
1.85
2.10
2.35
2.60
2.85
3.10
3.35
3.60
3.85
‐50
‐ 30
‐ 10
10
30
50
70
90
Supply Voltage (V)
Temperature (℃)
Figure 4. Current vs. Voltage, FRF = 433.92
868.35 MHz, SR = 1 ksps
/
Figure 3. Current vs. Temperature, FRF
433.92/868.35 MHz, SR = 1 ksps
=
Sensitivity vs. Temperature
Sensitivity vs. Supply Voltage
-108
-107.0
-109
-110
-111
-112
-108.0
-109.0
-110.0
868.35 MHz
-111.0
433.92 MHz
-113
-112.0
-113.0
-114.0
-115.0
868.35 MHz
-114
433.92 MHz
-115
-116
1.6
1.9
2.2
2.5
2.8
3.1
3.4
3.7
4
-60
-40
-20
0
20
40
60
80
100
Temperature (℃)
Supply Voltage (V)
Figure 6. Sensitivity vs. Supply Voltage, SR
= 1 ksps, BER = 0.1%
Figure 5. Sensitivity vs. Temperature, FRF = 433.92
/ 868.35 MHz, SR = 1 ksps, BER = 0.1%
Sensitivity vs. Symbol Rate
Sensitivity vs. BER
-108
-90
-109
-110
-111
-112
-113
-114
-95
-100
-105
868.35 MHz
433.92 MHz
-110
-115
868.35 MHz
433.92 MHz
-116
-117
-120
0
5
10
15
20
25
30
35
40
0.01%
0.10%
1.00%
10.00%
Symbol Rate (ksps)
Bit Error Rate
Figure 7. Sensitivity vs. SR, FRF = 433.92
868.35 MHz, VDD = 3.3 V, BER = 0.1%
/
Figure 8. Sensitivity vs. BER, FRF
= 433.92
/ 868.35MHz, VDD = 3.3 V, SR = 1 ksps
E‐mail:sales@hoperf.com
website://www.hoperf.com
Rev 1.0 | Page 8 / 20
RFM210W/RFM217W
4. Typical Application Schematic
Figure 9: Typical Application Schematic
Rev 1.0 | Page 9 / 20
E‐mail:sales@hoperf.com
website://www.hoperf.com
RFM210W/RFM217W
5. Functional Descriptions
AGC
I-LMT
I-MXR
OOK
CSB
SCL
SDA
DEMOD
Image
RFI
Rejection
Band-pass
Filter
Radio
Controller
LNA
RSSI
SAR
3-wire SPI
GND
AFC & AGC
Q-MXR
Q-LMT
VCO
26 MHz
Loop
Filter
LO GEN
PFD/CP
EEPROM
CLKO
DOUT
LDOs
Bandgap
POR
DIVIDER
LPOSC
XOSC
VDD
GND
AFC & Σ-Δ Modulator
XIN XOUT
nRSTO
VCON VCOP
Figure 10. Functional Block Diagram
5.1 Overview
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 RFM210W 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. The chip is based on a fully integrated, low-IF receiver architecture. The low-IF
architecture facilitates a very low external component count and does not suffer from powerline - induced interference problems.
The synthesizer contains a VCO and a low noise fractional-N PLL with an output frequency resolution of 24.8 Hz. The VCO
operates at 2x the Local Oscillator (LO) frequency to reduce spurious emissions. Every analog block is calibrated on each
Power-on Reset (POR) to the internal reference voltage. The calibration helps the device to finely work under different
temperatures and supply voltages. The baseband filtering and demodulation is done by the digital demodulator. The
demodulated signal is output to the external MCU via the DOUT pin. No external MCU control is needed in the applications.
The 3-wire SPI interface is only used for configuring the device. The configuration can be done with the RFPDK and the USB
Programmer. The RF Frequency, symbol rate and other product features are all configurable. This saves the cost and simplifies
the design, development and manufacture. Alternatively, in stock products of 433.92/868.35 MHz are available for immediate
demands with no need of EEPROM programming. The RFM210W/RFM217W operates from 1.8 to 3.6 V so that it can finely
work with most batteries to their useful power limits. The receive current is only 3.8 mA at 433.92 MHz and 5.2 mA at 868.35
MHz. The RFM210W/RFM217W receiver together with the CMT211x transmitter enables an ultra low cost RF link.
5.2 Modulation, Frequency and Symbol Rate
The RFM210W/RFM217W supports OOK demodulation with the symbol rate from 0.1 to 40 ksps. The RFM210W continuously
covers the frequency range from 300 to 480 MHz, including the license free ISM frequency band around 315 MHz and 433.92
MHz. And the RFM217W covers the frequency range from 300 MHz to 960 MHz, including the license free ISM frequency band
around 315
MHz, 433.92 MHz, 868.35 MHz and 915 MHz. The internal frequency synthesizer contains a high-purity VCO and a low noise
fractional-N PLL with an output frequency resolution of 24.8 Hz. See the table below for the demodulation, frequency and symbol
rate information.
E‐mail:sales@hoperf.com
website://www.hoperf.com
RFM210W/RFM217W
Rev 1.0 | Page 10 / 20
E‐mail:sales@hoperf.com
website://www.hoperf.com
RFM210W/RFM217W
Table 10. Modulation, Frequency and Symbol Rate
Parameter
Demodulation
Value
Unit
OOK
300 to 480
300 to 960
24.8
-
Frequency (RFM210W)
Frequency (RFM217W)
Frequency Resolution
Symbol Rate
MHz
MHz
Hz
0.1 to 40
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.
RFPDK
RFM210W/21
7
EEPROM
CSB
SCL
SDA
CMOSTEK USB
Programmer
Interface
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”.
E‐mail:sales@hoperf.com
website://www.hoperf.com
RFM210W/RFM217W
Table 11. Configurable Parameters in RFPDK
Category
Parameters
Descriptions
Default
Mode
The receive radio frequency, the range is from
300 to 480 MHz, with resolution of 0.001 MHz.
The receive radio frequency, the range is from
300 to 960 MHz, with resolution of 0.001 MHz.
The demodulation type, only OOK demodulation
is supported in this product.
Basic
Advanced
Basic
Frequency (RFM210W)
433.920 MHz
Frequency (RFM217W)
Demodulation
868.350 MHz
OOK
Advanced
Basic
Advanced
Basic
The receiver symbol rate, the range is from 0.1
to 40 ksps, with resolution of 0.1 ksps.
The threshold of the squelch circuit to suppress
the noise, the range is from 0 to 255.
Symbol Rate
2.4 ksps
54 / 40
Advanced
Basic
RF
Squelch TH
Settings
(RFM210W/RFM217W)
Advanced
The sum of the crystal frequency tolerance of
the Tx and the Rx, the range is from 0 to ±300
ppm. And the calculated BW is configured and
displayed.
Xtal Tol. | Rx BW
±150 ppm | 200 kHz
/ ±40 ppm | 100 kHz
Basic
(RFM210W/RFM217W)
Advanced
Time for the device to wait for the crystal to get
settled after power up. The options are: 78, 155,
310, 620, 1240 or 2480 us.
Basic
Xtal Stabilizing Time
310 us
Advanced
Turn on/off the duty-cycle receive mode, the
options are: on or off.
Basic
Advanced
Basic
Duty-Cycle Mode
Sleep Time
Rx Time
On
3 ms
The sleep time in duty-cycle receive mode, the
range is from 3 to 134,152,192 ms.
Advanced
Basic
The receive time in duty-cycle receive mode, the
range is from 0.04 to 2,683,043.00 ms.
The extended receive time in duty-cycle receive
mode, the range is from 0.04 to 2,683,043.00
ms. It is only available when WOR is on.
Turn on/off the wake-on radio function, the
options are: on or off.
2,000 ms
Advanced
Rx Time Ext
200.00 ms
Off
Advanced
Advanced
Advanced
Advanced
Wake-On Radio
Wake-On Condition
System Clock Output
Operation
Settings
The condition to wake on the radio. The options
are: Extended by Preamble, or Extended by
RSSI. It is only available when WOR is on.
Turn on/off the system clock output on CLKO,
the options are: on or off.
Extended by
Preamble
Off
The system clock output frequency, the options
are: 13.000, 6.500, 4.333, 3.250, 2.600, 2.167,
1.857, 1.625, 1.444, 1.300, 1.182, 1.083, 1.000,
0.929, 0.867, 0.813, 0.765, 0.722, 0.684, 0.650,
0.619, 0.591, 0.565, 0.542, 0.520, 0.500, 0.481,
0.464, 0.448, 0.433, 0.419 or 0.406 MHz. It is
only available when System Clock Output is on.
The OOK demodulation methods, the options
are: Peak TH, or Fixed TH
System Clock
Frequency
6.5 MHz
Advanced
Demod Method
Peak TH
60 / 50
Advanced
Advanced
The threshold value when the Demod Method is
“Fixed TH”, the minimum input value is the value
of Squelch Threshold set on the RFPDK, the
maximum value is 255.
OOK
Settings
Fixed Demod TH
(RFM210W/RFM217W)
E‐mail:sales@hoperf.com
website://www.hoperf.com
Rev 1.0 | Page 12 / 20
RFM210W/RFM217W
Category
Parameters
Peak Drop
Descriptions
Default
Mode
Turn on/off the RSSI peak drop function, the
options are on, or off.
On
Advanced
The RSSI peak drop step, the options are: 1, 2,
3, 5, 6, 9, 12 or 15.
Peak Drop Step
Peak Drop Rate
AGC
1
Advanced
Advanced
Advanced
Advanced
The RSSI peak drop rate, the options are: 1
step/4 symbols, 1 step/2 symbols, 1 step /1
symbol, or 1 step/0.5 symbol.
1 step /
4 symbols
Automatic Gain Control, the options are: on or
off.
On
The size of the valid preamble, the options are:
1-byte, 2-byte, 3-byte, or 4-byte. It is only
available when WOR is on.
Decode
Settings
2-byte
Preamble
5.5 Internal Blocks Description
5.5.1 RF Front-end and AGC
The RFM210W/RFM217W 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
common used 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.
5.5.2 IF Filter
The signals coming from the RF front-end are filtered by the fully integrated 3rd-order band-pass image rejection IF filter which
achieves over 35 dB image rejection ratio typically. The IF center frequency is dynamically adjusted to enable the IF filter to
locate to the right frequency band, thus the receiver sensitivity and out-of-band interference attenuation performance are kept
optimal despite the manufacturing process tolerances. The IF bandwidth is automatically computed according to the three basic
system parameters input from the RFPDK: RF frequency, Xtal tolerance, and symbol rate.
5.5.3 RSSI
The subsequent multistage I/Q Log amplifiers enhance the output signal from IF filter before it is fed for demodulation. Receive
Signal Strength Indicator (RSSI) generators are included in both Log amplifiers which produce DC voltages that are directly
proportional to the input signal level in both of I and Q path. The resulting RSSI is a sum of both these two paths. Extending from
the nominal sensitivity level, the RSSI achieves over 66 dB dynamic range.
The RFM210W/RFM217W integrates a patented DC-offset cancellation engine. The receiver sensitivity performance benefits a
lot from the novel, fast and accurate DC-offset removal implementation.
5.5.4 SAR ADC
The on-chip 8-bit SAR ADC digitalizes the RSSI for OOK demodulation.
5.5.6 LPOSC
An internal 1 kHz low power oscillator is integrated in the RFM210W/RFM217W. It generates a clock to drive the sleep timer to
E‐mail:sales@hoperf.com
website://www.hoperf.com
Rev 1.0 | Page 13 / 20
RFM210W/RFM217W
periodically wake the device from sleep state. The Sleep Time can be configured from 3 to 134,152,192 ms (more than 37 hours)
when the device works in duty-cycle receive mode. Since the frequency of the LPOSC drifts when the temperature and supply
voltage change, it is automatically calibrated during the PUP state, and is periodically calibrated since then. The calibration
scheme allows the LPOSC to maintain its frequency tolerance to less than ±1%.
5.6 Operation Mode
An option “Duty-Cycle On-Off” on the RFPDK allows the user to determine how the device behaves. The device is able to work in
two operation modes, as shown in the figure below.
PUP
SLEEP
TUNE
PUP
SLEEP
XTAL
RX
RX
TUNE
Always Receive Mode
Duty-Cycle Mode is set to Off
Duty-Cycle Receive Mode
Duty-Cycle Mode is set to On )
(
“
”
)
(
“
”
Figure 12. Two different operation modes
Power Up (PUP) State
Once the device is powered up, the device will go through the Power Up (PUP) sequence which includes the task of releasing the
Power-On Reset (POR), turning on the crystal and calibrating the internal blocks. The PUP takes about 4 ms to finish in the
always receive mode, and about 9.5 ms to finish in the duty-cycle receive mode. This is because that the LPOSC and sleep timer
is turned off in the always receive mode, while it must be turned on and calibrated during the PUP in the duty-cycle receive mode.
The average current of the PUP sequence is about 0.9 mA.
SLEEP State
In this state, all the internal blocks are powered down except the sleep timer. In Always Receive Mode, the sleep time is fixed at
about 3 ms. In Duty-Cycle Receive Mode, the sleep time is defined by the option “Sleep Time” on the RFPDK. The sleep current
is about 60 nA in the always receive mode, and about 440 nA (with LPOSC and sleep timer turned on) in the duty-cycle receive
mode.
XTAL State
The XTAL state only exists in the duty-cycle receive mode. Once the device wakes up from the SLEEP State, the crystal oscillator
restarts to work. The option “XTAL Stabilizing Time” on the RFPDK defines the time for the device to wait for the crystal oscillator
to settle. The current consumption in this state is about 520 uA.
TUNE State
The device is tuned to the desired frequency defined by the option “Frequency” on the RFPDK and ready to receive. It usually
takes approximately 300 us to complete the tuning sequence. The current consumption in this state is about 2 mA.
RX State
The device receives the incoming signals and outputs the demodulated data from the DOUT pin. In duty-cycle receive mode, the
device only stays in the RX State for a certain amount of time, which is defined by the option “Rx Time” on the RFPDK. The
current in this state is about 3.8 mA.
5.7 Always Receive Mode
E‐mail:sales@hoperf.com
website://www.hoperf.com
Rev 1.0 | Page 14 / 20
RFM210W/RFM217W
If the duty-cycle receive mode is turned off, the device will go through the Power Up (PUP) sequence, stay in the SLEEP state for
about 3 ms, tune the receive frequency, and finally stay in the RX state until the device is powered down. The power up sequence,
which takes about 4 ms to finish, includes the task of turning on the crystal and calibrating the internal blocks. The device will
continuously receive the incoming RF signals during the RX state and send out the demodulated data on the DOUT pin. The
configurable system clock is also output from the CLKO pin if it is enabled in the Advanced Mode on the RFPDK. The figure
below shows the timing characteristics and current consumption of the device from the PUP to RX.
E‐mail:sales@hoperf.com
website://www.hoperf.com
Rev 1.0 | Page 15 / 20
RFM210W/RFM217W
Data
(DOUT pin)
System Clock
(CLKO pin)
3.8 mA
Current
2.0 mA
900 uA
440 nA
PUP
TUNE
RX
SLEEP
State
about
3 ms
about
300 us
about 4 ms
Figure 13. Timing and Current Consumption for Always Receive Mode
5.8 Duty-Cycle Receive Mode
If the duty-cycle mode is turned on, after the PUP the device will automatically repeat the sequence of SLEEP, XTAL, TUNE and
RX until the device is powered down. This allows the device to re-tune the synthesizer regularly to adept to the changeable
environment and therefore remain its highest performance. The device will continuously receive any incoming signals during the
RX state and send out the demodulated data on the DOUT pin. The configurable system clock output is output from the CLKO
pin during the TUNE and RX state. The PUP sequence consumes about 9.5 ms which is longer than the 4 ms in the Always
Receive Mode. This is because the LPOSC, which drives the sleep timer, must be calibrated during the PUP.
Data
(DOUT pin)
System Clock
(CLKO pin)
3.8 mA
3.8 mA
Current
2.0 mA
2.0 mA
900 uA
520 uA
520 uA
440 nA
440 nA
PUP
SLEEP
XTAL
TUNE
RX
SLEEP
XTAL
TUNE RX
State
Sleep
Time
Sleep
Time
Xtal Stabilizing
Time
about
300 us
Xtal Stabilizing
Time
about
300 us
Rx Time
about 9.5 ms
Rx Time
Figure 14. Timing and Current Consumption for Duty-Cycle Receive Mode
It is strongly recommended for the user to turn on the duty-cycle receive mode option. The advantages are:
Maintaining the highest performance of the device by regular frequency re-tune.
Increasing the system stability by regular sleep (resetting most of the blocks).
Saving power consumptions of both of the Tx and Rx device.
As long as the Sleep Time and Rx Time are properly configured, the transmitted data can always be captured by the device.
E‐mail:sales@hoperf.com
website://www.hoperf.com
Rev 1.0 | Page 16 / 20
RFM210W/RFM217W
5.9 Easy Duty-Cycle Configurations
When the user wants to take the advantage of maintaining the highest system stability and performance, and the power
consumption is not the first concern in the system, the Easy Configuration can be used to let the device to work in the duty-cycle
mode without complex calculations, the following is a good example:
TX Data
T = Packet Length (72 ms)
A missed packet
Two missed packets
RX State
time
SLEEP, XTAL and TUNE
RX
T = Rx Time (1000 ms)
T = Sleep Time (3 ms)
XTAL Stabilizing Time (310 us)
Tuning Time (300 us) = 3.61 ms
+
+
output data corrupted
output data corrupted
Data
(DOUT pin)
Figure 15. Tx and Rx relationship of Easy Configuration
In this example, the Tx device transmits the data at 1.2 ksps and there are 60 symbols in one data packet. Thus, the packet
length is 50 ms. The user can do the following:
Set the Sleep Time to the minimum value of 3 ms.
Set the Rx Time to 1 second which is much longer than the packet length.
Let the Tx device to send out 3 continuous data packets in each transmission.
Because the Sleep Time is very short, the non-receive time is only about 3.61 ms (the sum of the Sleep Time, XTAL stabilizing
time and the tuning time), which is much shorter than the packet length of 50 ms. Therefore, this non-receive time period will only
have a change to corrupt no more than 2 packets receiving. During the non-receive time period, the DOUT pin will output logic 0.
Because the Rx Time is very long, and 3 continuous data packets are sent in each transmission, there is at least 1 packet that
can be completely received by the device and sent out via the DOUT pin with no corruption. The external MCU will only need to
observe the DOUT pin status to perform data capturing and further data processing.
If the system power consumption is a sensitive and important factor in the application, the Precise Configuration can be used.
Also, based on the duty-cycle receive mode, the “Wake-On Radio” technique allows the device to even save more power. For the
precise duty-cycle configurations and the use of wake-on radio, please refer to the “AN108 RFM210W/RFM217W Configuration
Guideline”.
E‐mail:sales@hoperf.com
website://www.hoperf.com
Rev 1.0 | Page 17 / 20
RFM210W/RFM217W
6. Ordering Information
RFM210W-433 S1
Package
Operation Band
Mode Type
P/N: RFM210W-315S1
RFM210W module at 315MHz band,SMD Package
P/N: RFM210W-433S1
RFM210W module at 433MHz band,SMD Package
P/N: RFM217W-868S1
RFM217W module at 868MHz band,SMD Package
P/N: RFM217W-915S1
RFM217W module at 915MHz band,SMD Package
E‐mail:sales@hoperf.com
website://www.hoperf.com
Rev 1.0 | Page 18 / 20
RFM210W/RFM217W
7. Package Outline
Figure 13
S1 Package Outline Drawi
E‐mail:sales@hoperf.com
website://www.hoperf.com
Rev 1.0 | Page 19 / 20
RFM210W/RFM217W
8.Contact Information
HOPE MICROELECTRONICS CO.,LTD
Add: 2/F, Building 3, Pingshan Private Enterprise Science and Technology Park, Lishan Road, XiLi Town, Nanshan
District, Shenzhen, Guangdong, China
Tel: 86-755-82973805
Fax: 86-755-82973550
Email: sales@hoperf.com
Website: http://www.hoperf.com
http://www.hoperf.cn
This document may contain preliminary information and is subject to
change by Hope Microelectronics without notice. Hope Microelectronics
assumes no responsibility or liability for any use of the information
contained herein. Nothing in this document shall operate as an express or
HOPE MICROELECTRONICS CO.,LTD
Add: 2/F, Building 3, Pingshan Private
Enterprise Science and Technology
Park, Lishan Road, XiLi Town, Nanshan
District, Shenzhen, Guangdong, China
Tel: 86-755-82973805
implied license or indemnity under the intellectual property rights of Hope
Microelectronics or third parties. The products described in this document
are not intended for use in implantation or other direct life support
applications where malfunction may result in the direct physical harm or
injury to persons. NO WARRANTIES OF ANY KIND, INCLUDING, BUT
NOT LIMITED TO, THE IMPLIED WARRANTIES OF MECHANTABILITY
OR FITNESS FOR A ARTICULAR PURPOSE, ARE OFFERED IN THIS
DOCUMENT.
Fax: 86-755-82973550
Email: sales@hoperf.com
Website: http://www.hoperf.com
http://www.hoperf.cn
©2006, HOPE MICROELECTRONICS CO.,LTD. All rights reserved.
E‐mail:sales@hoperf.com
website://www.hoperf.com
Rev 1.0 | Page 20 / 20
相关型号：
©2020 ICPDF网 联系我们和版权申明