Datasheet WA1470 (WAVIoT) - 3

Datasheet WA1470 NB-Fi transceiver Block Diagram & Chip Architecture ODE STM ref ADC DFT TE TRX IRQ VDDIO Digital LDO LDODIG POR POR EXT
SPI
DCOC VDD LNA RX INp LNA LDO LNA ADC Clock ADC Reference Gm Generation Buffer RX INn VDD MIXER MIXER LDO VDD BB BaseBand LDO
/ Receiver
DCOC VDD PLL VCO LDO SPI SCLK / DFTEN RegMap eFuse Control er PLL LDO MISO / DFTOUT Digital MOSI / DFTIN Filters VDD PA Auto-tune CSB / DFTRSTB MoDem PA LDO TX LDO PA ADC Clock
/ / /
Auto-Calibrate 90 VDD Bias VCO Auto-tune BG & Bias
Frequency PMU Digital Synthesizer Functions
GP LDO LP RC Osc. *LP OSC Output BPSK Input *HP OSC Output HP RC Osc. TX OUTp PA DCOC
/
TX OUTn TEMP Sense *CML OUTp CML DCOC Testing MUX *CML OUTn *TMUX Lines
Transmitter Testing Figure 1: WA1470 Functional Block Diagram The WA1470 receiver architecture is direct conversion where the received RF signal is converted directly to baseband. The received RF signal is amplified at the input by a differential low noise amplifier (LNA) followed by a trans-conductance (Gm) stage and quadrature down conversion mixer (I and Q) to baseband signal. The baseband signal is amplified and low pass filtered by 4th order active low pass filter (Rx-BB). The output signal from Rx-BB is digitized by analog to digital converter (ADC) and passed to the baseband modem for further processing. The WA1470 transmitter utilizes direct conversion from baseband digital to analog converter (DAC), followed by an active low pass filter with programmable attenuation to RF frequency and finally output power is generated using an integrated class-E power amplifier (PA). Output power level can be configured from -8 dBm to +15 dBm at antenna with steps of 3 dB as maximum. Input of transmitter DAC is generated by the baseband modem. Rev 5 – June 2020 Page 3 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