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PDF RFM02 Data sheet ( Hoja de datos )
| Número de pieza | RFM02 | |
| Descripción | Universal ISM Band FSK Transmitter | |
| Fabricantes | HOPERF | |
| Logotipo |  |
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RFM02
RFM02 Universal ISM
Band FSK Transmitter
DESCRIPTION
RFM02
Hope’s RFM02 is a single chip, low power, multi-channel FSK
transmitter designed for use in applications requiring FCC or
ETSI conformance for unlicensed use in the 433, 868, and
915 MHz bands. Used in conjunction with RF01, Hope’s FSK
receiver, the RFM02 transmitter produces a flexible, low cost,
and highly integrated solution that does not require
production alignments. All required RF functions are
integrated. Only an external crystal and bypass filtering are
needed for operation. The RFM02 offering a higher output
power and an improved phase noise characteristic.
The RFM02 features a completely integrated PLL for easy
RF design, and its rapid settling time allows for fast frequency hopping, bypassing multipath fading and
interference to achieve robust wireless links. In addition, highly stable and accurate FSK modulation is
accomplished by direct closed-loop modulation with bit rates up to 115.2 kbps. The PLL’s high resolution
allows the use of multiple channels in any of the bands.
The integrated power amplifier of the transmitter has an open-collector differential output that directly
drive a loop antenna with programmable output level. No additional matching network is required. An
automatic antenna tuning circuit is built in to avoid costly trimming procedures and de-tuning due to the
“hand effect”.
For low-power applications, the device supports automatic activation from sleep mode. Active mode
can be initiated by several wake-up events (on-chip timer timeout, low supply voltage detection).
Tel: +86-755-82973805 Fax: +86-755-82 E-mail: [email protected] http://www.hoperf.com
Free Datasheet http://www.datasheet4u.com/
1 page  
RFM02
GENERAL DEVICE SPECIFICATION
All voltages are referenced to Vss, the potential on the ground reference pin VSS.
Absolute Maximum Ratings (non-operating)
Symbol Parameter
Vdd Positive supply voltage
Vin Voltage on any pin except open collector outputs
Voc Voltage on open collector outputs
Iin
ESD
Input current into any pin except VDD and VSS
Electrostatic discharge with human body model
Tst Storage temperature
Min Max
-0.5 6.0
-0.5 Vdd+0.5
-0.5 6.0
-25 25
1000
-55 125
Units
V
V
V
mA
V
℃
Recommended Operating Range
Symbol Parameter
Vdd Positive supply voltage
Voc Voltage on open collector outputs (Max 6.0 V)
Top Ambient operating temperature
Min
2.2
Vdd - 1
-40
Max
5.4
Vdd + 1
85
Units
V
V
℃
ELECTRICAL SPECIFICATION
(Min/max values are valid over the whole recommended operating range, typ conditions:
Top =27℃;Vdd =Voc=2.7V)
DC Characteristics
Symbol Parameter
Idd_TX_0
Supply current
(TX mode,
Pout =0dBm)
433 MHz band
868 MHz band
915 MHz band
Idd_TX_PMAX
Supply current
(TX mode,
Pout =Pmax)
433 MHz band
868 MHz band
915 MHz band
Ipd Standby current in sleep mode
(Note 1)
Iwt Wake-up timer current
consumption
Ilb Low battery detector current
consumption
Ix Idle current
Conditions/Notes
Active state with
0dBm
output power
Active state with
maximum output
power
All blocks
disabled
Min
Only crystal
oscillator is on
Typ Max
12
14
15
21
23
24
0.3
1.5
0.5
1.5
Units
mA
mA
µA
µA
µA
mA
Tel: +86-755-82973805 Fax: +86-755-82 E-mail: [email protected] http://www.hoperf.com
Free Datasheet http://www.datasheet4u.com/
5 Page 
d2 d1 d0 Clock Output
Frequency [MHz]
0001
0 0 1 1.25
0 1 0 1.66
0112
1 0 0 2.5
1 0 1 3.33
1105
1 1 1 10
RFM02
The resulting output frequency can be calculated as:
fout = f0 – (-1)SIGN * (M + 1) * (30 kHz)
where:
f0 is the channel center frequency (see the next
command)
M is the three bit binary number <m2 : m0>
SIGN = (ms) XOR (FSK input)
Note:
• Use M in a range from 0 to 6.
2. Power Management Command
bit 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 POR
1 1 0 0 0 0 0 0 a1 a0 ex es ea eb et dc C000h
Bits 5-0, enable the corresponding block of the transmitters, i.e. the crystal oscillator is enabled by
the ex bit, the synthesizer by es, the power amplifier by ea and the low battery detector by eb, while the
wake-up timer by et. The bit dc disables the clock output buffer.
When receiving the Data Transmit Command, the chip supports automatic on/off control over the
crystal oscillator, the PLL and the PA.
If bit a1 is set, the crystal oscillator and the synthesizer are controlled automatically. Data Transmit
Command starts up the crystal oscillator and as soon as a stable reference frequency is available the
synthesizer starts. After a subsequent delay to allow locking of the PLL, if a0 is set the power amplifier is
turned on as well.
Note:
To enable the automatic internal control of the crystal oscillator, the synthesizer and the power
amplifier, the corresponding bits (ex, es, ea) must be zero in the Power Management Command.
The ex bit should be set in the Power Management Command for the correct control of es and ea.
The oscillator can be switched off by clearing the ex bit after the transmission.
The Sleep Command can be used to indicate the end of the data transmission process.
For processing the events caused by the peripheral blocks (POR, LBD or wake-up timer) the chip
requires operation of the crystal oscillator. This operation is fully controlled internally, independently from
the status of the ex bit, but if the dc bit is zero, the oscillator remains active until Sleep Command is
issued. (This command can be considered as an event controller reset.)
Tel: +86-755-82973805 Fax: +86-755-82 E-mail: [email protected] http://www.hoperf.com
Free Datasheet http://www.datasheet4u.com/
11 Page | ||
| Páginas | Total 24 Páginas | |
| PDF Descargar | [ Datasheet RFM02.PDF ] | |
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