SX1231H Просмотр технического описания (PDF) - Semtech Corporation

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SX1231H

Low Power Integrated UHF Transceiver with On-Chip +20dBm PA

Semtech Corporation 

SX1231H

ADVANCED COMMUNICATIONS & SENSING

DATASHEET

3.3. Transmitter Description

The transmitter of SX1231H comprises the frequency synthesizer, modulator and power amplifier blocks.

3.3.1. Architecture Description

LNA

RFIO

Receiver Chain

PA0

Local

Oscillator

PA1

PA_BOOST

PA2

Figure 5. Transmitter Block Diagram

3.3.2. Bit Rate Setting

When using the SX1231H in Continuous mode, the data stream to be transmitted can be input directly to the modulator via

pin 9 (DIO2/DATA) in an asynchronous manner, unless Gaussian filtering is used, in which case the DCLK signal on pin 10

(DIO1/DCLK) is used to synchronize the data stream. See section 3.3.5 for details on the Gaussian filter.

In Packet mode or in Continuous mode with Gaussian filtering enabled (refer to section 5.5 for details), the Bit Rate (BR) is

controlled by bits BitRate in RegBitrate:

BR

=

--F----X---O----S---C---

BitRate

Amongst others, the following Bit Rates are accessible:

Rev 1 - Oct 2011

Page 19

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