Electronic Components Datasheet Search
Selected language     English  ā–¼

Delete All
ON OFF

Advanced Search

              





RFM95 Datasheet(PDF) 78 Page - HOPE Microelectronics CO., Ltd.

Part No. RFM95
Description  Low Power Long Range Transceiver Module
Download  121 Pages
Scroll/Zoom Zoom In 100% Zoom Out
Maker  HOPE [HOPE Microelectronics CO., Ltd.]
Homepage  https://www.hoperf.com/
Logo 

 78 page
background image
Page 78
RFM95/96/97/98(W)
Tel: + 86-755-82973805
Fax: + 86-755-82973550
E-mail: sales@hoperf.com http:/ / www.hoperf.com
WIRELESS & SENSING
PRELIMINARY
DATASHEET
5.4. Transmitter Description
The transmitter of RFM95/96/97/98(W) comprises the frequency synthesizer, modulator (both LoRaTMĀ  and FSK/OOK) and
power amplifier blocks, together with the DC biasing and ramping functionality that is provided through the VR_PA block.
5.4.1. Architecture Description
The architecture of the RF front end is shown in the following diagram.
Figure 40. RF Front-end Architecture Shows the Internal PA Configuration.
5.4.2. RF Power Amplifiers
PA_HF and PA_LF are high efficiency amplifiers capable of yielding RF power programmable in 1 dB steps from -4 to
+14dBm directly into a 50 ohm load with low current consumption. PA_LF covers the lower bands (up to 525 MHz), whilst
PA_HF will cover the upper bands (from 860 MHz). The output power is sensitive to the power supply voltage, and typically
their performance is expressed at 3.3V.
PA_HP (High Power), connected to the PA_BOOST pin, covers all frequency bands that the chip addresses. It permits
continuous operation at up to +17 dBm and duty cycled operation at up to +20dBm. For full details of operation at +20dBm
please consult Section 5.4.3
Table 77 Power Amplifier Mode Selection Truth Table
PaSelect
Mode
Power Range
Pout Formula
0
PA_HF or PA_LF on RFO_HF or RFO_LF
-4 to +15dBm
Pout=Pmax-(15-OutputPower)
Pmax=10.8+0.6*MaxPower [dBm]
1
PA_HP on PA_BOOST, any frequency
+2 to +17dBm
Pout=17-(15-OutputPower) [dBm]
Notes - For +20 dBm restrictions on operation please consult the following section.
- To ensure correct operation at the highest power levels ensure that the current limiter OcpTrim is adjusted to
permit delivery of the requisite supply current.
- If the PA_BOOST pin is not used it may be left floating.




Html Pages

1  2  3  4  5  6  7  8  9  10  11  12  13  14  15  16  17  18  19  20  21  22  23  24  25  26  27  28  29  30  31  32  33  34  35  36  37  38  39  40  41  42  43  44  45  46  47  48  49  50  51  52  53  54  55  56  57  58  59  60  61  62  63  64  65  66  67  68  69  70  71  72  73  74  75  76  77  78  79  80  81  82  83  84  85  86  87  88  89  90  91  92  93  94  95  96  97  98  99  100   ...More


Datasheet Download




Link URL

Does ALLDATASHEET help your business so far?  [ DONATE ]  

About Alldatasheet   |   Advertisement   |   Contact us   |   Privacy Policy   |   Bookmark   |   Link Exchange   |   Manufacturer List
All Rights ReservedĀ© Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  , Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp  |   Russian : Alldatasheetru.com
Korean : Alldatasheet.co.kr   |   Spanish : Alldatasheet.es  |   French : Alldatasheet.fr  |   Italian : Alldatasheetit.com  |   Portuguese : Alldatasheetpt.com  |   Polish : Alldatasheet.pl