|
|
PDF RF83L Data sheet ( Hoja de datos )
| Número de pieza | RF83L | |
| Descripción | 300 - 440MHz ASK/OOK Receiver | |
| Fabricantes | HOPERF | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de RF83L (archivo pdf) en la parte inferior de esta página. Total 21 Páginas | ||
|
No Preview Available !
Receiver V1.0
RF83L 300~440MHz ASK/OOK
RF83L 300MHz-440MHz ASK/OOK Receiver
-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
-
Features
300MHz to 440MHz frequency range
Operational voltage: 2.2V-3.6V
High receiver sensitivity: -108dBm
Data-rate up to 10kbps (fixed-mode)
Low Power Consumption
2.5mA fully operational at 315MHZ,
3.5mA fully operational at 433MHZ,
0.9µA in shutdown
300µA in polled operation (10:1 duty-cycle)
Wake-up output flag to enable decoders and microprocessors
Very low RF re-radiation at the antenna
Highly integrated with extremely low external part count
16PIN SOP
Applications
Automotive Remote Keyless Entry (RKE)
Remote controls
Remote fan and light control
Garage door and gate openers
8PIN SOP
RF83L
The RF83L 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
RF83L is a fully featured part in 16-pin packaging and The RF83A/B/C/DL is a same part packaged in 8-
pin packaging with a reduced feature set.
The RF83L 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 RF83L 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 RF83L, so no external
filters are necessary. One of four demodulator filter bandwidths may be selected externally by the user.
The RF83L offer two modes of operation; fixed-mode (FIX) and sweep-mode (SWP). In fixed mode the
RF83L functions as a conventional super-heterodyne receiver. In sweep mode the RF83L sweeps a wider RF
spectrum. Fixed-mode provides better selectivity and sensitivity performance and sweep mode enables the
RF83L to be used with low cost, imprecise transmitters.
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  
RF83L 300~440MHz ASK/OOK Receiver V1.0
5. 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
5000 Hz
10000Hz
2500 Hz
5000Hz
1250 Hz
2500 Hz
625 Hz
1250 Hz
Table 1. Nominal Demodulator Filter Bandwidth vs. SEL0, SEL1 and Operating Mode
6. Pin Description
Pin Number
16-Pin Pkg.
1
2, 3
4
5
6
7
8
9
Pin Number
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 Information” for 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/
5 Page 
RF83L 300~440MHz ASK/OOK Receiver V1.0
12.2.1. Crystal or Ceramic Resonator Selection
If operating in fixed-mode, a crystal is recommended. In sweep-mode either a crystal or ceramic resonator
may be used. When a crystal of ceramic resonator is used the minimum voltage is
300mVPP. If using an externally applied signal it should be AC-coupled and limited to the
operating range of 0.1VPP to 1.5VPP.
12.2.2. Selecting Reference Oscillator Frequency fT (Fixed Mode)
As with any superheterodyne receiver, the mixing between the internal LO (local oscillator) frequency fLO
and the incoming transmit frequency fTX ideally must equal the IF center frequency. Equation 1 may be used
to compute the appropriate fLO for a given fTX:
(1) fLO =fTX ±(0.86
fTX )
315
Frequencies fTX and fLO are in MHz. Note that two values of fLO exist for any given fTX,
distinguished as “high-side mixing” and “low-side mixing.” High-side mixing results in an image
frequency above the frequency of interest and low-side mixing results in a frequency below.
After choosing one of the two acceptable values of fLO, use Equation 2 to compute the reference
oscillator frequency fT:
(2) fT =
FLO
64.5
Frequency fT is in MHz. Connect a crystal of frequency fT to REFOSC on the RF83L.
Four-decimal-place accuracy on the frequency is generally adequate. The following table
identifies fT for some common transmit frequencies when the RF83L is operated in fixed
mode.
Transmit Frequency (fTX)
315MHz
Reference Oscillator Frequency (fT)
4.8970 MHz
390 MHz
6.0630 MHz
418 MHz
6.4983 MHz
433.92 MHz
6.7458 MHz
Table 2. Fixed Mode Recommended Reference Oscillator Values For Typical Transmit
Frequencies (high-side mixing)
12.2.3. Selecting REFOSC Frequency fT (Sweep Mode)
Selection of the reference oscillator frequency fT in sweep mode is much simpler than in fixed
mode due to the LO sweeping process. Also, accuracy requirements of the frequency reference
component are significantly relaxed.
In sweep mode, fT is given by Equation 3:
(3) fT =
FLO
64.25
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 21 Páginas | |
| PDF Descargar | [ Datasheet RF83L.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| RF83 | 300 ~ 440MHz ASK Receiver |  HOPE MICROELECTRONICS |
| RF83 | 300 - 440MHz ASK/OOK Receiver | HOPERF |
| RF83C | 300 - 440MHz ASK/OOK Receiver | HOPERF |
| RF83L | 300 - 440MHz ASK/OOK Receiver | HOPERF |
| Número de pieza | Descripción | Fabricantes |
| SLA6805M | High Voltage 3 phase Motor Driver IC. |
 Sanken |
| SDC1742 | 12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters. |
 Analog Devices |
|
DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares, |
| DataSheet.es | 2020 | Privacy Policy | Contacto | Buscar |