WTR4905/WTR4605 RF Transceiver

Description

WTR4905/WTR4605 RF Transceiver Slide Number 2 Revision History Slide Number 4 Introduction WTR Devices Overview WTR Devices Overview RF Front-end Using the WTR4905 Device WTR4x05 Introduction WTR4x05 Introduction – Block Diagram WTR4x05 Transmit and Support Blocks WTR4x05 Receive Blocks WTR4x05 Introduction – Features (1 of 3) WTR4x05 Introduction – Features (2 of 3) WTR4x05 Introduction – Features (3 of 3) WTR4x05 Supported Air Interfaces Supported Bands and Airlink Technologies (1 of 2) Supported Bands and Airlink Technologies (2 of 2) WTRx05 Introduction – Package (60 WLNSP) WTR Device Variants WTR4905/WTR4605 Comparisons WTR4905 Pin Assignments WTR4605 Pin Assignments (differences from WTR4905 are highlighted) Chipset Support & Reference Designs Chipset Support Matrix Available Reference Designs QTI Support for WTR Devices Reference Documents Migration from WTR1605L to WTR4905 WTR4905 versus WTR1605L Chipset Connections PRx Inputs Comparison DRx Inputs Comparison Power Supply Comparison Packages Keep-out Area Comparison Example WTR1605L PCB Layout (EU + B2) Example WTR4905 PCB Layout (Japan) High-level Area Comparison WTR Related System-level Topics Topics Addressed in this Section Software Defined RF Port Assignments WTR4x05 Port Mapping Guidance Reference Design Port Mapping Table (1 of 3) Reference Design Port Mapping Table (2 of 3) Reference Design Port Mapping Table (3 of 3) Supported Dual-Tx RF Techniques SVLTE (and its variations) DSDA Design Guidelines for Dual-Tx RF Techniques Example Applications WTR4905 Japan WTR4905 NA2 CSFB WTR4905 5-mode CMCC BOM Reduced WTR4905/WTR2605 SGLTE/DSDA/CT-SVLTE WTR4905 + WTR2605 VzW SVLTE/NA1 WTR3905 + WTR4605 Configurable for SVLTE VzW, CT-SVLTE/DSDA, SGLTE/DSDA WTR3905 + WTR4605 VzW SVLTE Variant WTR3905 + WTR4605 CT-SVLTE with Opportunistic DSDA WTR3905 + WTR4605 CMCC SGLTE with Opportunistic DSDA General Design Guidelines WTR-specific General Design Guidelines WTR-specific General Design Guidelines Summary of Key WTR-related Design Guidelines WTR Transmitters WTR4x05 WAN Transmitters WTR4x05 Tx Baseband Interface with the Modem IC WTR4x05 RF Tx Output Ports WTR4905 Japan Tx Ports – Schematic Example WTR4905 Japan Tx Ports – Layout Guidelines Example WTR Receivers WTR4x05 WAN PRx Receivers WTR4x05 WAN DRx Receivers WTR4x05 TX_FBRX and GNSS Receivers WTR4x05 Rx Baseband Interfaces with the Modem IC (1 of 3) WTR4x05 Rx Baseband Interfaces with the Modem IC (2 of 3) WTR4x05 Rx Baseband Interfaces with the Modem IC (3 of 3) RF Rx Ports – WTR4x05 PRx WTR4905 Japan PRx Input Ports – Schematic Example WTR4905 Japan PRx Input Ports – Layout Guidelines Example (1 of 2) WTR4905 Japan PRx Input Ports – Layout Guidelines Example (2 of 2) RF Rx Ports – WTR4x05 DRx WTR4905 Japan DRx Input Ports – Schematic Example WTR4905 Japan DRx Input Ports – Layout Guidelines Example RF Rx Ports – WTR4x05 TX_FBRX and GNSS WTR4905 Japan TX_FBRX and GNSS RF Ports – Schematic Example WTR4905 Japan TX_FBRX and GNSS RF Ports – Layout Example RF Rx Ports – Comments GSM SAW-less Overview WTR4x05 SAW-less Configuration WTR4x05 GSM SAW/SAW-less Design Example Tx Feedback Receiver Overview Feedback of the Tx RF Signal WTR4905 TX_FBRX Overview (1 of 2) WTR4905 TX_FBRX Overview (2 of 2) PCB Keep-out Areas PCB Keep-out Areas (1 of 2) PCB Keep-out Areas (2 of 2) WTR DC Power General DC Power Layout Techniques (1 of 2) General DC Power Layout Techniques (2 of 2) WTR DC Power Supply Example (1 of 2) WTR DC Power Supply Example (2 of 2) WTR Ground Connections WTR Ground Connections (1 of 2) WTR Ground Connections (2 of 2) WTR Support Circuits WTR Support Circuits 19.2 MHz XO 19.2 MHz Crystal Clarification (1 of 2) 19.2 MHz Crystal Clarification (2 of 2) WTR Digital Status and Control RF Layout Techniques (General) General RF Layout Techniques (1 of 3) General RF Layout Techniques (2 of 3) General RF Layout Techniques (3 of 3) RF Front-end Guidance General Design Considerations General Design Guidelines for RF Front-ends Transmit Bandpass Filters (1 of 2) Transmit Bandpass Filters (2 of 2) PA Thermistors PA Power Management RF Top-level Parts Placement (1 of 2) RF Top-level Parts Placement (2 of 2) WTR4905 Japan RF Top-level Parts Placement Example Shielding Recommendations Key RF Component Recommendations Tx Feedback Receiver Design Considerations TX_FBRX Design Considerations B41 Design Considerations Design Considerations for B41 B28 Design Considerations Design Considerations for B28 Thank You