Infineon XENSIV BGT60LTR11AIP Manual
60 ghz radar system platform
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AN608
XENSIV
BGT60LTR11AIP shield
™
60 GHz radar system platform
Board version 2.0
About this document
Scope and purpose
This application note describes the function, circuitry, and performance of the 60 GHz radar BGT60LTR11AIP
shield. The shield provides the supporting circuitry to the on-board BGT60LTR11AIP MMIC, Infineon's 60 GHz
radar chipset with Antenna in Package (AIP). In addition to the autonomous mode configuration, the shield offers
a digital interface for configuration and transfer of the acquired radar data to a microcontroller board, e.g. Radar
Baseboard MCU7.
Intended audience
This document is intended for anyone working with Infineon's XENSIV™ 60 GHz radar system platform.
Disclaimer
The platform serves as a demonstrator to perform simple motion sensing. The test data in this document
shows typical performance of demonstrator. However, board performance may vary depending on the PCB
manufacturer, specific design rules they may impose and components they may use.
Application Note
Please read the Important Notice and Warnings at the end of this document
www.infineon.com
page 1 of 22
2021-07-29
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Table of Contents
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Summary of Contents for Infineon XENSIV BGT60LTR11AIP
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Page 1: About This Document
This application note describes the function, circuitry, and performance of the 60 GHz radar BGT60LTR11AIP shield. The shield provides the supporting circuitry to the on-board BGT60LTR11AIP MMIC, Infineon’s 60 GHz radar chipset with Antenna in Package (AIP). In addition to the autonomous mode configuration, the shield offers a digital interface for configuration and transfer of the acquired radar data to a microcontroller board, e.g. -
Page 2: Table Of Contents
XENSIV™ BGT60LTR11AIP shield 60 GHz radar system platform Introduction Table of contents About this document ........................1 Table of contents ..........................2 Introduction .......................... 3 Overview ..............................3 Key features and system benefits ......................4 System specifications ......................5 BGT60LTR11AIP shield parameters ......................5 Typical current consumption ......................... -
Page 3: Introduction
(MCU) using SPI. This sampled radar data can be used for developing customized algorithms. The shield can also be attached to an Arduino MKR board or an Infineon Radar Baseboard MCU7. Infineon’s Toolbox supports this platform with a demonstration software and a Radar Graphical User Interface (Radar GUI) to display and analyze acquired data in time and frequency domain. -
Page 4: Key Features And System Benefits
XENSIV™ BGT60LTR11AIP shield 60 GHz radar system platform Introduction Key features and system benefits The BGT60LTR11AIP MMIC is a fully integrated microwave motion sensor including antenna elements, configurable built-in detectors and a state machine allowing fully autonomous operation of the device. The chip is designed to operate as a Doppler motion sensor. -
Page 5: System Specifications
XENSIV™ BGT60LTR11AIP shield 60 GHz radar system platform System specifications System specifications BGT60LTR11AIP shield parameters Table 1 lists the various parameters of the BGT60LTR11AIP shield. Table 1 BGT60LTR11AIP shield specifications Parameter Unit Min. Typ. Max. Comments System performance Maximum detection range –... - Page 6 XENSIV™ BGT60LTR11AIP shield 60 GHz radar system platform System specifications Figure 2 Current consumption of shield with pulse width = 5 µs and PRT = 500 µs Application Note 6 of 22 2021-07-29...
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Page 7: Hardware Description
The BGT60LTR11AIP shield is a very small PCB of 20 x 6.25 mm size. Mounted on top of the PCB is a BGT60LTR11AIP (U1 in Figure 2), Infineon’s 60 GHz radar sensor with integrated antennas. The antennas are integrated into the chip package; therefore, the PCB can be manufactured using a standard FR4 laminate. The bottom side of the shield has the connectors to the Radar Baseboard MCU7 [1] (P1 and P2 in Figure 2). -
Page 8: Bgt60Ltr11Aip Mmic
XENSIV™ BGT60LTR11AIP shield 60 GHz radar system platform Hardware description 1.5V_RF 1.8V or 3.3V 1.5V_PLL 3.3V Castellated Holes 1.5V_RF P_Det LED2 1.5V_RF T_Det LED1 38.4 MHz EEPROM quartz Figure 5 Block diagram of the BGT60LTR11AIP shield The block diagram in Figure 5 depicts the configuration of the shield. When the shield is plugged into the Radar Baseboard MCU7, the MMIC’s supplies are initially deactivated. - Page 9 XENSIV™ BGT60LTR11AIP shield 60 GHz radar system platform Hardware description The integrated target detector circuits in the MMIC indicate the detection of movement in front of the radar and the direction of movement with two digital signals (BGT_TARGET_DET and BGT_PHASE_DET). See section 3.8 for more details.
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Page 10: Sensor Supply
XENSIV™ BGT60LTR11AIP shield 60 GHz radar system platform Hardware description Figure 8 Top and side view of the BGT60LTR11AIP MMIC package – all dimensions in mm Sensor supply Since radar sensors are very sensitive to supply voltage fluctuations or cross-talk between different supply domains, a low-noise power supply as well as properly decoupled supply rails are vital. -
Page 11: External Capacitors
XENSIV™ BGT60LTR11AIP shield 60 GHz radar system platform Hardware description Figure 10 The crystal circuit on the BGT60LTR11AIP shield External capacitors The BGT60LTR11AIP MMIC performs a sample and hold operation for lower power consumption. The capacitors between sample and hold and the high-pass filter are external. C10, C11, C14 and C15 are 5.6 nF capacitors used as “hold”... -
Page 12: Eeprom
XENSIV™ BGT60LTR11AIP shield 60 GHz radar system platform Hardware description The signal IRQ is connected with a R5 resistor (0 Ω) to the divider output (BGT_DIV) of the MMIC. In pulse mode, BGT_DIV generates a signal that acts as an interrupt signal for the MCU to start ADC acquisition. BGT_DIV could also be used to measure divider frequency. -
Page 13: Leds And Level Shifting
XENSIV™ BGT60LTR11AIP shield 60 GHz radar system platform Hardware description Figure 13 Connections of the EEPROM LEDs and level shifting The shield has two LEDs to indicate the motion detection (green) and target’s direction of motion (red), as shown in Figure 14. R1 and R2 are limiting resistors. The digital block within the detector in the MMIC evaluates and sets the Target_detect/Phase_detect outputs of the BGT60LTR11AIP MMIC. -
Page 14: Mmic Operation Modes And Settings
XENSIV™ BGT60LTR11AIP shield 60 GHz radar system platform Hardware description MMIC operation modes and settings The BGT60LTR11AIP MMIC has four quad-state inputs (QS1 to QS4). These can be configured in different ways to change the settings of the MMIC, as shown in Figure 15, Table 5, and Table 6. When the pin PLL_TRIG is kept 1 during chip boot and QS1 is either GND or OPEN (i.e., in autonomous mode), pins SPI_SCK and SPI_MOSI are also sampled to determine the Pulse Repetition Time (dc_rep_rate). -
Page 15: Layer-Stack Up And Routing
XENSIV™ BGT60LTR11AIP shield 60 GHz radar system platform Hardware description Japan e-fuse Mode PCB configuration 61.4 GHz J2 = DNP; R4 = 0 Ω GND (default) 60.6 GHz J2 = 0 Ω; R4 = DNP OPEN 60.7 GHz J2 = DNP; R4 = DNP 60.8 GHz J2 = DNP;... -
Page 16: Autonomous (Pulse Mode) Operation
XENSIV™ BGT60LTR11AIP shield 60 GHz radar system platform Autonomous (pulse mode) operation Autonomous (pulse mode) operation In the autonomous mode operation, the MMIC uses internal detectors for motion and direction of motion indication. The detector output signals are connected to LEDs which glow according to target movement. A shield working in autonomous mode can be used as a plug-on radar module. - Page 17 XENSIV™ BGT60LTR11AIP shield 60 GHz radar system platform Autonomous (pulse mode) operation The default QS2 and QS3 setting on the shield are for sensitivity level 13 and 1 second hold time respectively. In order to have up to 16 settings for QS2 (Sensitivity) and QS3 (Hold time), the PLL_TRIG should be connected to VDD by removing R6 and placing R18 = 0 Ω.
- Page 18 XENSIV™ BGT60LTR11AIP shield 60 GHz radar system platform Autonomous (pulse mode) operation To configure the Pulse Repetition Time (PRT) for the autonomous mode (QS1 is either GND or OPEN), pins SPI_MOSI and SPI_CLK are used. They are sampled during chip boot up. Figure 20 shows the timing diagram and current consumption for the configuration with PRT = 1000 µs.
- Page 19 XENSIV™ BGT60LTR11AIP shield 60 GHz radar system platform Autonomous (pulse mode) operation Figure 21 Shield mounted on an Arduino MKR Wifi1010 board Application Note 19 of 22 2021-07-29...
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Page 20: References
XENSIV™ BGT60LTR11AIP shield 60 GHz radar system platform References References Infineon application note – AN599 – “Radar Baseboard MCU7” Application Note 20 of 22 2021-07-29... -
Page 21: Revision History
XENSIV™ BGT60LTR11AIP shield 60 GHz radar system platform Revision history Revision history Document Date of release Description of changes version V1.0 2020-06-03 First version – preliminary V1.1 2020-10-20 Mass market version V1.2 2020-11-17 Updated autonomous mode info V1.3 2021-03-16 Updated Figure 14 V1.4 2021-07-15 Major document updates to support shield V2.0... - Page 22 Infineon Technologies hereby disclaims dangerous substances. For information on the types © 2021 Infineon Technologies AG. any and all warranties and liabilities of any kind in question please contact your nearest Infineon All Rights Reserved. (including without limitation warranties of non- Technologies office.