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PDF RFM23B Data sheet ( Hoja de datos )
| Número de pieza | RFM23B | |
| Descripción | (RFM22B / RFM22B) ISM TRANSCEIVER MODULE | |
| Fabricantes | HOPERF | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de RFM23B (archivo pdf) en la parte inferior de esta página. Total 70 Páginas | ||
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RFM22B/23B
RFM22B/23B ISM TRANSCEIVER MODULE V1.0
Features
Frequency Range
Wake-up timer
433/868/915MHz ISM bands
Auto-frequency calibration (AFC)
Power-on-reset (POR)
Sensitivity = –121 dBm
Antenna diversity and TR switch
Output power range
control
+20 dBm Max (RFM22B)
Configurable packet handler
+13 dBm Max (RFM23B)
Preamble detector
Low Power Consumption
18.5 mA receive
30 mA @ +13 dBm transmit
85 mA @ +20 dBm transmit
Data Rate = 0.123 to 256 kbps
FSK, GFSK, and OOK modulation
Power Supply = 1.8 to 3.6 V
Ultra low power shutdown mode
Digital RSSI
TX and RX 64 byte FIFOs
Low battery detector
Temperature sensor and 8-bit ADC
–40 to +85 °C temperature range
Integrated voltage regulators
Frequency hopping capability
On-chip crystal tuning
14-PIN DIP & 16-PIN SMD package
Low cost
Applications
RFM22B/23B
Remote control
Home security & alarm
Telemetry
Personal data logging
Toy control
Tire pressure monitoring
Wireless PC peripherals
Remote meter reading
Remote keyless entry
Home automation
Industrial control
Sensor networks
Health monitors
Tag readers
Description
HopeRF's RFM22B/23B are highly integrated, low cost,433/868/915MHZ
wireless ISM transceivers module. The low receive sensitivity(–121dBm)
coupled with industry leading +20dBm output power ensures extended
range and improved link performance. Built-in antenna diversity and
support for frequency hopping can be used to further extend range and enhance
performance.
Additional system features such as an automatic wake-up timer, low
battery detector, 64 byte TX/RX FIFOs, automatic packet handling, and preamble
detection reduce overall current consumption and allow the use of lower-cost
system MCUs. An integrated temperature sensor, general purpose ADC, power-
on-reset (POR), and GPIOs further reduce overall system cost and size.
The RFM22B/23B’s digital receive architecture features a high-performance ADC
and DSP based modem which performs demodulation, filtering, and packet
handling for increased flexibility and performance. The direct digital transmit
modulation and automatic PA power ramping ensure precise transmit modulation
and reduced spectral spreading ensuring compliance with global regulations
including FCC, ETSI.
An easy-to-use calculator is provided to quickly configure the radio settings,
simplifying customer's system design and reducing time to market.
Tel: +86-755-82973805 Fax: +86-755-82973550 E-mail: [email protected] http://www.hoperf.com
1
Free Datasheet http://www.datasheet4u.com/
1 page  
RFM22B/23B
Table 2. Synthesizer AC Electrical Characteristics
Parameter
Symbol
Conditions
Min Typ Max Units
Synthesizer Frequency
Range—RFM22B/23B
FSYN
433MHz band
868MHz band
915MHz band
413 453 MHz
848 888 MHz
901 929 MHz
Synthesizer Frequency
Resolution
Reference Frequency
Input Level
Synthesizer Settling Time
Residual FM
Phase Noise
FRES-LB
433MHz Band
— 156.25 —
FRES-HB
868/915MHz Band
— 312.5 —
fREF_LV When using external reference signal 0.7 — 1.6
driving XOUT pin, instead of using
crystal. Measured peak-to-peak (VPP)
tLOCK Measured from exiting Ready mode with — 200 —
XOSC running to any frequency.
Including VCO Calibration.
Hz
Hz
V
µs
FRMS
Integrated over 250 kHz bandwidth
(500 Hz lower bound of integration)
—
2
4 kHzRMS
L(fM)
F = 10 kHz
F = 100 kHz
— –80 — dBc/Hz
— –90 — dBc/Hz
F = 1 MHz
— –115 — dBc/Hz
F = 10 MHz
— –130 — dBc/Hz
Tel: +86-755-82973805 Fax: +86-755-82973550 E-mail: [email protected] http://www.hoperf.com
5
Free Datasheet http://www.datasheet4u.com/
5 Page 
RFM22B/23B
2. Functional Description
HopeRF's RFM22B/23B are highly integrated,low cost,433/868/915MHz wireless ISM transceivers module .
The wide operating voltage range of 1.8–3.6 V and low current consumption makes theRFM22B/23B
an ideal solution for battery powered applications.
The RFM22B/23B operates as a time division duplexing (TDD) transceiver where the device alternately transmits
and receives data packets. The device uses a single-conversion mixer to downconvert the 2-level FSK/GFSK/OOK
modulated receive signal to a low IF frequency. Following a programmable gain amplifier (PGA) the signal is
converted to the digital domain by a high performance ADC allowing filtering, demodulation, slicing, and packet
handling to be performed in the built-in DSP increasing the receiver’s performance and flexibility versus analog
based architectures. The demodulated signal is then output to the system MCU through a programmable GPIO or
via the standard SPI bus by reading the 64-byte RX FIFO.
A single high precision local oscillator (LO) is used for both transmit and receive modes since the transmitter and
receiver do not operate at the same time. The LO is generated by an integrated VCO and Fractional-N PLL
synthesizer. The synthesizer is designed to support configurable data rates, output frequency and frequency
deviation at 433MHz,868MHz,915MHz band. The transmit FSK data is modulated directly into the data
stream and can be shaped by a Gaussian low-pass filter to reduce unwanted spectral content.
The RFM22B’s PA output power can be configured between +1 and +20 dBm in 3 dB steps, while the RFM23B's
PA output power can be configured between –8 and +13 dBm in 3 dB steps. The RFM22B/23B supports
frequency hopping, TX/RX switch control, and antenna diversity switch control to extend the link range and
improve performance
The RFM22B/23B is designed to work with a microcontroller to create a very low cost system as shown
Figure 1. Voltage regula tors are integrated on-chip which allows for a wide operating supply voltage range
from +1.8 to +3.6 V. A standard 4-pin SPI bus is used to communicate with an external microcontroller. Three
configurable general purpose I/Os are available. A complete list of the available GPIO functions is shown in
"8. Auxiliary Functions"and includes microcontroller clock output, Antenna Diversity, POR, and various interrupts.
Tel: +86-755-82973805 Fax: +86-755-82973550 E-mail: [email protected] http://www.hoperf.com
11
Free Datasheet http://www.datasheet4u.com/
11 Page | ||
| Páginas | Total 70 Páginas | |
| PDF Descargar | [ Datasheet RFM23B.PDF ] | |
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