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RF67 Schematic ( PDF Datasheet ) - HOPERF

Teilenummer RF67
Beschreibung Integrated Transmitter IC
Hersteller HOPERF
Logo HOPERF Logo 




Gesamt 30 Seiten
RF67 Datasheet, Funktion
RF67
ADVANCED COMMUNICATIONS & SENSING
DATASHEET
RF67 - Integrated Transmitter IC
Narrow/wideband 315 MHz, 434 MHz 868 MHz and 915 MHz band Transmitter
GENERAL DESCRIPTION
The RF67 is a fully integrated transmitter which can
operate in the 315, 434, 868 and 915 MHz licence free ISM
bands.
The transmitter has two modes of operation, a conventional
MCU controlled mode and a ‘stand-alonemode which
enables the RF67 to download configuration and
messages from an E2PROM in response to a user input.
Stand-alone mode makes the RF67 ideal for miniaturized or
low cost remote keyless entry (RKE) applications. It also
offers the unique advantage of narrow-band and wide-band
communication in a range of modulation formats.
The RF67 offers high RF output power and channelized
operation suited for the European (ETSI EN 300-220-1),
North American (FCC part 15.231, 15.247 and 15.249) and
Japanese (ARIB T-67) regulatory standards.
APPLICATIONS
Remote Keyless Entry (RKE)
Remote Control / Security Systems
Voice and Data RF Communication Links
Process and building / home control
Active RFID
AMR / AMI Platforms
KEY PRODUCT FEATURES
+17 dBm to -18 dBm Programmable output power.
Bit rates up to 600 kbits / sec.
FSK, GFSK, MSK, GMSK and OOK modulation.
Stand-alone mode: No need for a host MCU.
Consistent RF performance over a 1.8 to 3.7 V range.
ORDERING INFORMATION
Low phase noise (-95 dBc/Hz at 50 kHz) with
automated PLL calibration and fully integrated VCO
Part Number Temperature Range Qty. per Reel
Package
and loop filter.
RF67
-40 °C to +85 °C
3000
MLPQ-24 (4x4mm)
On chip RC timer for timer / wake-up applications.
Low battery detection.
Tel: +86-755-82973805 Fax: +86-755-82973550 E-mail: [email protected] http://www.hoperf.com
Page 1
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RF67 Datasheet, Funktion
RF67
1.3. Pin Description
Table 1 Description of the RF67 Pinouts
Number
Name
0 GROUND
1 VR_ANA
2 XTB
3 XTA
4 RESET
5 PB(0)
6 PB(1)
7 PB(2)
8 PB(3)
9 VR_DIG
10 CLKOUT
11 PLL_LOCK
12 DCLK
13 DATA
14 SCK
15 MISO
16 MOSI
17 NSS
18 TEST
19 GND
20 RFOUT
21 GND
22 VR_PA
23 VBAT
24 E2_MODE
Type
-
I/O
I/O
I
I/O
I
I
I
I
I
O
O
O
I
I
I/O
I/O
I/O
I
-
O
-
I/O
I
I
Description MCU Mode
Description Stand Alone Mode
Global ground (bottom of package)
Regulated supply voltage for analog circuitry
Crystal connection
Crystal connection
Reset, active high
Low battery indicator output
Push-button input 0, active high
Connect to GROUND
Push-button input 1, active high
Connect to GROUND
Push-button input 2, active high
Connect to GROUND
Push-button input 3, active high
Regulated supply for digital circuitry
Reference clock output for MCU
Reference clock output
PLL lock detection, active high
Transmission of frame OK, active low
Output data clock
NC
Modulation input data
NC
SPI Clock input
SPI Clock output
SPI Data output
SPI Data input
SPI Data input
SPI Data output
SPI Chip select input
SPI Chip select output
Connect to GROUND
RF Ground
RF Output
RF Ground
Regulated supply for PA
Main supply voltage from battery
Mode select ‘0’ = MCU mode
Mode select ’1’ = Stand alone mode
Tel: +86-755-82973805 Fax: +86-755-82973550 E-mail: [email protected] http://www.hoperf.com
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6 Page









RF67 pdf, datenblatt
ADVANCED COMMUNICATIONS & SENSING
RF67
DATASHEET
5. Operation of the RF67
The RF67 is an integrated ISM band transmitter and features a fully integrated frequency synthesizer, modulator and
power amplifier. This section describes the operation of the RF67 and the functionality of these blocks.
5.1. Main Parameters
5.1.1. Center Frequency
The carrier output center frequency, fRF, of the RF67 is programmable via the SPI interface. It is determined by the
following equation:
where freq_rf(23:0) is the decimal value of the 24 bit number stored in configuration registers FrfMsb, FrfMid and FrfLsb
and fXOSC is the frequency of the crystal oscillator. If the optimal value of 32 MHz is selected for the crystal oscillator, then
this results in a programmable frequency resolution of 61.035 Hz.
Note that RF output frequencies are only valid in the bands 290-340 MHz, 431-510 MHz and 862-1020 MHz. Note also,
that for ease of use, the band selection process is performed automatically.
5.1.2. Frequency Deviation
The frequency deviation of the RF67 in FSK mode is given by the following equation:
where df_coeff is the decimal value of the 14 bit contents of the FdevLsb and FdevMsb configuration registers.
5.1.3. Bit Rate
The bit rate (or, depending upon coding, the chip rate) of the RF67 is given by the following equation:
where fXOSC is the crystal oscillator frequency, br_ratio is the decimal value of the 16 bit contents of registers BrMsb and
BrLsb. Note that for OOK modulation the maximum bit rate is 32.7 kbps which corresponds to a br_ratio(15:0) of 979.
The table below gives examples of some of the standard data rates accessible with RF67.
Page 12
Tel: +86-755-82973805 Fax: +86-755-82973550 E-mail: [email protected] http://www.hoperf.com
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