TRC103 RFM, TRC103 Datasheet - Page 51

• Manufacturer Part Number: TRC103
• Description: RFIC TRANSCEIVER MULTI-CHANNEL F
• Manufacturer: RFM
• Series: TRCr

Specifications of TRC103

• Frequency: 863MHz ~ 960MHz
• Data Rate - Maximum: 100kbps
• Modulation Or Protocol: FSK, OOK
• Applications: General Purpose
• Power - Output: 11dBm
• Sensitivity: -112dBm
• Voltage - Supply: 2.1 V ~ 3.6 V
• Current - Receiving: 4mA
• Current - Transmitting: 30mA
• Data Interface: PCB, Surface Mount
• Antenna Connector: PCB, Surface Mount
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 32-QFN
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Memory Size: -
• Other names: 583-1095-2

It is generally a good practice to set the OOK rise and fall time to about 5% of a bit period to avoid excessive
modulation bandwidth:
Where t
20/10 µs rise/fall times given in the table above are satisfactory. When operating in the 863 - 870 MHz band under
ETSI EN300 220-1 regulations, check the modulation bandwidth carefully at bit rates above 8 kb/s to confirm
compliance. For operation in certain 863 - 870 MHz subbands, the required rise/fall time may be greater than 5%.
6.4 Frequency Synthesizer Channel Programming for FSK Modulation
When using a standard 12.8 MHz reference crystal, the FSK RF channel frequency is:
Where F
registers that hold the values of P, S and R:
MCFG00 bit 0 selects the register set to use for the frequency synthesizer. A 0 value selects register set MCFG06
- MCFG08 and a 1 value selects register set MCFG09 - MCFG0B. In addition, MCFG00 bits 4..3 select the oper-
ating band as follows:
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©2009-2010 by RF Monolithics, Inc.
OOK
t
F
RF
OOK
RF
is in MHz, and P, S, and R are divider integers with S less than (P + 1). There are two sets of three
is the nominal 5% OOK rise/fall time in µs and BR is the bit rate in kb/s. At low OOK data rates the
= 14.4*(75*(P + 1) + S)/(R + 1), with P and S in the range 0 to 255, R in the range 64 to 169
= 50/BR
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Pattern of Bits 4..3
00
01
10
11
MCFG00 bits 4..3
Regulator Rise/Fall Times
MCFG0A
MCFG0B
Register
MCFG06
MCFG07
MCFG08
MCFG09
Technical support +1.800.704.6079
10
00
01
10
11
8.5/8.5 µs
15/15 µs
23/23 µs
3/3 µs
Table 62
Table 63
Table 64
Divider Parameter
863 - 870 MHz
902 - 915 MHz
915 - 928 MHz
950 - 960 MHz
not used
Band
R1
P1
S1
R2
P2
S2
OOK Rise/Fall Time
20/10 µs
2.5/2 µs
10/6 µs
5/3 µs
TRC103 - 12/15/10
Page 51 of 64