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PDF RF83C Data sheet ( Hoja de datos )

Número de pieza RF83C
Descripción 300 - 440MHz ASK/OOK Receiver
Fabricantes HOPERF 
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RF83/RF83C ASK/OOK Receiver V1.1
RF83/RF83C 300~440MHz ASK/OOK Receiver
General Description
The RF83/RF83C is a single chip ASK/OOK (ON-OFF
Keyed) RF receiver IC. This device is a true antenna-in to
data-out‖ monolithic device. All RF and IF tuning are
accomplished automatically within the IC which
eliminates manual tuning and reduces production costs.
The result is a highly reliable yet low cost solution.
The RF83 is a fully featured part in 16-pin packaging
and the RF83C is a reduced function set part packaged in
8-pin packaging . The RF83/RF83C operating voltage
range is 3.6V-5.5V, Their low voltage counterparts are
RF83L/RFM83CL at 2.1V-3.6V.
The RF83 provides two additional functions, (1) a
Shutdown pin, which may be used to turn the device off
for duty-cycled operation, and (2) a Wake-up‖ output,
which provides an output flag indicating when an RF
signal is present. These features make the RF83 ideal for
low and ultra-low power applications, such as RKE and
remote controls.
All IF filtering and post-detection (demodulator) data
filtering is provided within the RF83/RF83C, so no
external filters are necessary.
The RF83 offer two modes of operation; fixed-mode (FIX) and sweep-mode (SWP). In fixed mode the RF83
functions as a conventional super-heterodyne receiver. In sweep mode the RF83 sweeps a wider RF spectrum.
Fixed-mode provides better selectivity and sensitivity performance and sweep mode enables the RF83 to be
used with low cost, imprecise transmitters.
Features
Applications
300MHz to 440MHz frequency range
Operating voltage: 3.6V-5.5V( RF83/RF83C)
2.1V-3.6V(RF83L/RF83CL)
High receiver sensitivity: -108dBm (315MHz)
Automotive Remote Keyless Entry(RKE)
Remote controls
Remote fan and light control
Garage Door and gate openers
-108dBm (433MHz)
Data-rate up to 10kbps (fixed-mode)
Low Power Consumption
3mA fully operational (315MHz,RF83)
0.9µA in shutdown
Wake-up output flag to enable decoders and microprocessors
Highly integrated with extremely low external part count
Tel: +86-755-82973805 Fax: +86-755-82973550 E-mail: [email protected] http://www.hoperf.com
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RF83C pdf
RF83/RF83C ASK/OOK Receiver V1.1
4. 8-Pin Options
The standard 16-pin package allows complete control of all configurable features. Some reduced
function 8-pin versions are also available.
For high-volume applications additional customized 8-pin devices can be produced. SWEN, SEL0
and SEL1 pins are internally bonded to reduce the pin count. Pin 6 may be configured as either
SHUT or WAKEB.
SEL0
1
0
1
0
SEL1
1
1
0
0
Demodulator Bandwidth
Sweep Mode Fixed Mode
5KHz
10KHz
2.5KHz
5KHz
1.25KHz
2.5KHz
0.625KHz
1.25KHz
Table 1. Nominal Demodulator Filter Bandwidth vs. SEL0, SEL1 and Operating Mode
5. Pin Description
RF83
16-Pin Pkg.
1
2, 3
4
5
6
7
8
9
RF83C
8-Pin Pkg.
1
2
3
4
Pin
Name
SEL0
VSSRF
ANT
VDDRF
VDDBB
CTH
NC
VSSBB
Pin Function
Bandwidth Selection Bit 0 (Digital Input): Used in
conjunction with SEL1 to set the desired demodulator filter
bandwidth. See Table 1. Internally pulled-up to VDDRF
RF Power Supply: Ground return to the RF section power
supply.
Antenna (Analog Input): For optimal performance the
ANT pin should be impedance matched to the antenna. See
Applications Informationfor information on input
impedance and matching techniques
RF Power Supply: Positive supply input for the RF section
of the IC
Base-Band Power Supply: Positive supply input for the
baseband section (digital section) of the IC
Data Slicing Threshold Capacitor (Analog I/O): Capacitor
connected to this pin extracts the dc average value from the
demodulated waveform which becomes the reference for
the internal data slicing comparator
Not internally connected
Base-Band Power Supply: Ground return to the baseband
section power supply
Tel: +86-755-82973805 Fax: +86-755-82973550 E-mail: [email protected] http://www.hoperf.com
-5-
Free Datasheet http://www.datasheet4u.com/

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RF83C arduino
RF83/RF83C ASK/OOK Receiver V1.1
13.1.1. Step 1: Selecting the Operating Mode
13.1.1.1. Fixed-Mode Operation
For applications where the transmit frequency is accurately set (that is, applications where a SAW or crystal-
based transmitter is used) the RF83 may be configured as a standard superheterodyne receiver (fixed mode).
In fixed-mode operation the RF bandwidth is narrower making the receiver less susceptible to interfering
signals. Fixed mode is selected by connecting SWEN to ground.
13.1.1.2. Sweep-Mode Operation
When used in conjunction with low-cost L-C transmitters the RF83 should be configured in sweep-mode. In
sweep-mode, while the topology is still superheterodyne, the LO (local oscillator) is swept over a range of
frequencies at rates greater than the data rate. This technique effectively increases the RF bandwidth of the
RF83, allowing the device to operate in applications where significant transmitter-receiver frequency
misalignment may exist. The transmit frequency may vary up to ±0.5% over initial tolerance, aging, and
temperature. In sweep-mode a band approximately 1.5% around the nominal transmit frequency is captured.
The transmitter may drift up to ±0.5% without the need to retune the receiver and without impacting system
performance.
The swept-LO technique does not affect the IF bandwidth, therefore noise performance is not degraded
relative to fixed mode. The IF bandwidth is 430kHz whether the device is operating in fixed or sweep-mode.
Due to limitations imposed by the LO sweeping process, the upper limit on data rate in sweep mode is
approximately 5.0kbps.
Similar performance is not currently available with crystal-based superheterodyne receivers which can
operate only with SAW- or crystal-based transmitters.
In sweep-mode, a range reduction will occur in installations where there is a strong interferer in the swept
RF band. This is because the process indiscriminately includes all signals within the sweep range. An RF83
may be used in place of a superregenerative receiver in most applications.
13.1.2. Step 2: Selecting the Reference Oscillator
All timing and tuning operations on the RF83/RF83C are derived from the internal Colpitts reference
oscillator. Timing and tuning is controlled through the REFOSC pin in one of three ways:
1) Connect a ceramic resonator
2) Connect a crystal
3) Drive this pin with an external timing signal
The specific reference frequency required is related to the system transmit frequency and to the operating
mode of the receiver as set by the SWEN pin of RF83.
Tel: +86-755-82973805 Fax: +86-755-82973550 E-mail: [email protected] http://www.hoperf.com
- 11 -
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