Datasheet WA1470 (WAVIoT) - 4

Datasheet WA1470 NB-Fi transceiver
The integrated PA is used for constant envelope modulation schemes as BPSK/DPSK. The integrated PA input has two modes: 1. RF input is generated from integrated frequency synthesizer and its phase is modulated by a serial digital data stream (0° and 180°). 2. DAC baseband output is up converted directly to RF frequency in a quadrature architecture (I and Q), then summed up at the PA pre-driver input (Tx mixer output). In case that a linear PA is required (due to a variable amplitude modulation scheme) or a higher output power level is required, there is a linear CML driver following the Tx mixer to drive an external PA while the integrated (internal) PA will be off in this mode. The WA1470 has a single input clock for proper operation, TCXO at 26 MHz is expected. The WA1470 can operate using a voltage supply ranging from 1.8V to 3.6V, based on integrated power management regulators. A standard 4-pin SPI interface is used to communicate with the external MCU. One-time programmable memory is integrated to store the ID and some required production trimming controls. Rev 5 – June 2020 Page 4 of 24 sales@waviot.com | www.waviot.com Document Outline Key Product Features General Description Applications Block Diagram & Chip Architecture Pin Diagram Pin List & Description Typical Connectivity Chip Modes Specifications ESD Ratings Operating Range Performance Specifications Description of the Registers eFuse Mirror Registers Non-eFuse Writable Registers Read Only Registers Packaging Information Contact Information