Os motores de busca de Datasheet de Componentes eletrônicos |
|
RF96 Folha de dados(PDF) 80 Page - HOPE Microelectronics CO., Ltd. |
|
RF96 Folha de dados(HTML) 80 Page - HOPE Microelectronics CO., Ltd. |
80 / 121 page Page 80 RF96/97/98 Tel: +86-755-82973805 Fax: +86-755-82973550 E-mail: sales@hoperf.com http://www.hoperf.com WIRELESS & SENSING PRELIMINARY DATASHEET 5.4.4. Over Current Protection The power amplifiers of RF96/97/98 are protected against current over supply in adverse RF load conditions by the over current protection block. This has the added benefit of protecting battery chemistries with limited peak current capability and minimising worst case PA consumption in battery life calculation. The current limiter value is controlled by the OcpTrim bits in RegOcp, and is calculated according to the following formulae: Table 81 Trimming of the OCP Current OcpTrim IMAX Imax Formula 0 to 15 45 to 120 mA 45 + 5*OcpTrim [mA] 16 to 27 130 to 240 mA -30 + 10*OcpTrim [mA] 27+ 240 mA 240 mA Note Imax sets a limit on the current drain of the Power Amplifier only, hence the maximum current drain of the RF96/ 77/78 is equal to Imax + IFS. 5.5. Receiver Description 5.5.1. Overview The RF96/97/98 features a digital receiver with the analog to digital conversion process being performed directly following the LNA-Mixers block. In addition to the LoRaTM modulation scheme the low-IF receiver is able to demodulate ASK, OOK, (G)FSK and (G)MSK modulation. All filtering, demodulation, gain control, synchronization and packet handling is performed digitally allowing a high degree of programmable flexibility. The receiver also has automatic gain calibration, this improves the precision of RSSI measurement and enhances image rejection. 5.5.2. Receiver Enabled and Receiver Active States In the receiver operating mode two states of functionality are defined. Upon initial transition to receiver operating mode the receiver is in the „receiver-enabled‟ state. In this state the receiver awaits for either the user defined valid preamble or RSSI detection criterion to be fulfilled. Once met the receiver enters „receiver-active‟ state. In this second state the received signal is processed by the packet engine and top level sequencer. For a complete description of the digital functions of the RF96/97/98 receiver please see Section 4 of the datasheet. 5.5.3. Automatic Gain Control In FSK/OOK Mode The AGC feature allows receiver to handle a wide Rx input dynamic range from the sensitivity level up to maximum input level of 0dBm or more, whilst optimizing the system linearity. The following table shows typical NF and IIP3 performances for the RF96/97/98 LNA gains available. |
Nº de peça semelhante - RF96 |
|
Descrição semelhante - RF96 |
|
|
Ligação URL |
Privacy Policy |
ALLDATASHEETPT.COM |
ALLDATASHEET é útil para você? [ DONATE ] |
Sobre Alldatasheet | Publicidade | Contato conosco | Privacy Policy | roca de Link | Lista de Fabricantes All Rights Reserved©Alldatasheet.com |
Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
Family Site : ic2ic.com |
icmetro.com |