RFM42B-868-S1 QUASAR, RFM42B-868-S1 Datasheet - Page 28

• Manufacturer Part Number: RFM42B-868-S1
• Description: MODULE, TRANSMITTER, 20DB,SMD,868MHZ
• Manufacturer: QUASAR

Specifications of RFM42B-868-S1

• Modulation Type: FSK, GFSK, OOK
• Supply Voltage Range: 1.8V To 3.6V
• Supply Current: 85mA
• Interface Type: SPI
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

RFM42B/43B
5.2.1. Output Power Selection
With the RFM42B,the output power is configurable in 3 dB steps with the txpow[2:0] field in "Register 6Dh. TX
Power." Extra output power can allow the use of a cheaper, smaller antenna reducing the overall BOM cost. The
higher power setting of the chip achieves maximum possible range, but of course comes at the cost of higher TX
current consumption. However, depending on the duty cycle of the system, the effect on battery life may be
insignificant. Contact HOPERF Support for help in evaluating this tradeoff.
The +13 dBm output power of the RF43B is targeted at systems that require lower output power. The PA still
offers high efficiency and a range of output power from –8 to +13 dBm.
28
Add R/W Function/Description
6D
Tel: [phone]
R/W
TX Power
Fax: [phone]
txpow[2:0]
txpow[2:0]
D7
000
001
010
100
101
000
001
010
100
101
011
110
111
011
110
111
D6
D5
RFM43B Output Power
RFM42B Output Power
E-mail: [e-mail] http://www.hoperf.com
D4
+14 dBm
+17 dBm
+20 dBm
+10 dBm
+13 dBm
+11 dBm
+1 dBm
+2 dBm
+5 dBm
+8 dBm
–8 dBm
–5 dBm
–2 dBm
+1 dBm
+4 dBm
+7 dBm
D3
txpow[2]
D2
txpow[1]
D1
txpow[0]
D0
POR Def.
07h