User Manual for AIRTOUCH models including: AT58L4LDB-2020 5.8GHz Radar Sensor Module, AT58L4LDB-2020, 5.8GHz Radar Sensor Module, Radar Sensor Module, Sensor Module, Module
Airtouch (Shanghai) Intelligent Technology Co., Ltd AT5815B 2AVK2-AT5815B 2AVK2AT5815B at5815b
5.8GHz Radar Sensor Module AT58L4LDB-2020 5.8GHz Radar Sensor Module Version: 1.1 Version 1.0 Airtouch (Shanghai) Intelligent Technology Co., Ltd 11th Floor, Building 4, Lane 388, Shengrong Road, Pudong New District, Shanghai, China Page 1 5.8GHz Radar Sensor Module Content Abstract........................................................................................................................................................... 3 Module illustration......................................................................................................................................... 3 Input output interface....................................................................................................................................4 Module dimension and connector location................................................................................................5 Electric characteristics..................................................................................................................................5 Operation mode, sensing time and sensing distance adjustments.......................................................6 PD detection...................................................................................................................................................6 Module power-up sequence........................................................................................................................ 6 Sensing distance........................................................................................................................................... 7 Attention..........................................................................................................................................................7 Revision History.............................................................................................................................................8 Version 1.0 Page 2 5.8GHz Radar Sensor Module Abstract AT58L4LDB-2020 is a radar sensor module in 5.8GHz with configurable power consumption. In normal mode the power consumption is about 13mA while 30uA in lower power mode. The module dimension is 20mm*20mm. The module adopts Airtouch's AT58LP1T1RDB IC which highly integrates the microwave ckt, IF amplifier and signal process unit, with embedded patch antenna which minimizes the overall module dimension with optimized performance and regulatory compliance. These features facilitates the applications in portable lighting and camera wake-up fields for non-fixed frequency solutions upgrades and for cost-down option in conventional 5.8GHz microwave solutions upgrades. Module illustration Photo diode Patch antenna OTP MCU SQ013L AT58LP1T1RDB Plot. 1 AT58L4LDB-2020 module Version 1.0 Page 3 5.8GHz Radar Sensor Module Input output interface The module reserves a 5-pin 2.54mm pin-pitch connector: VCC GND OUT SCL and SDA. The sensing distance and delay time are adjustable by either on-board resisters setting on the module or registers configuration by external MCU. Below table is the 5-pin definition: Pin VIN GND OUT SCL SDA Function Power supply GND O/P signal I/O I/O Remark When LDO DNE, external DC power supply ranges from 2.7 ~4.8V. If LDO is pop'ed, the DC supply is LDO dependent. Output level (0V/3.3V) or IF signal Connect to OTP or AT58L4LDB-2020's SCL Connect to OTP or AT58L4LDB-2020's SDA Compatible design: When the 0 ohm resistors in red rectangles are pop'ed with parts in blue rectangles removed, the signal of Pin4&Pin5 are IIC of radar IC; When the 0 ohm resistors in blue rectangles are pop'ed with parts in red rectangles removed, the signal of Pin4&Pin5 are GPIOs of MCU. Compatible design: When the 0 ohm resistor in red rectangle is pop'ed with part in blue rectangle removed, the supply voltage should within 2.7~4.8V; When the LDO in blue rectangle is pop'ed with part in red rectangle removed, the supply voltage should conform to the LDO's Spec. Compatible design: When the 0 ohm resistor in red rectangle is pop'ed with part in blue rectangle removed, the signal of Pin3 is GPIO; When the 0 ohm resistor in blue rectangle is pop'ed with part in red rectangle removed, the signal of Pin3 is analog IF. Plot. AT58L4LDB-2020 Module design detail Version 1.0 Page 4 5.8GHz Radar Sensor Module Module dimension and connector location Plot. 3 illustrates the module dimension and connector location pin pitch is 2.0mm. The module dimension is 20mm*20mm and PCB thickness is 1.6mm. By default the connector is NC. Plot. 3 AT58L4LDB-202 module dimension and connector location Electric parameters Parameter Min. Typ. Max. Unit Remark Tx frequency 5725 5875 MHz Tx power 0.2 0.5 mW Supply voltage 2.7 3.3 4.8 V LDO DNE(default) O/P high level 3.3 V O/P low level 0 V Current consumption 13 mA Normal mode 100 uA Low power mode Sensing distance 4 5 M Hang-up in 3 meters Delay time 2 S Adjustable PD threshold 10 Lux Adjustable Operation temp. -20 85 °C Version 1.0 Page 5 5.8GHz Radar Sensor Module Operation mode, sensing time and sensing distance adjustments AT58L4LDB-2020 reserves on-board resisters setting for operation mode selection. In Plot. 4, when the resistor in red rectangle is 0R, the module is in normal operation mode (about 13mA); when the resistor is NC, the module is in low power mode (100uA). In Plot. 4, the resistor in blue rectangle is for the sensing delay time setting for light-on. When the resistor is NC, the delay time is 30s; when the resistor is 0R, the delay time is 1.5 s; when the resistor is 2.4M Ohm the delay time is 63 s. The sensing time is delayed accordingly during an existing sensing which outputs high. In Plot. 4, the 3 resistors in yellow rectangle (th0, th1 and th2) offers 8-shift sensing distances. The resistor NC is logic 1resistor 0R is logic 0. The truth table of the 3 resistors is in Plot. 5. The smaller value of threshold results in longer sensing distance. Plot. 4 on-board resistors setting illustration Plot. 5 Truth table for sensing distance adjustment Version 1.0 Page 6 5.8GHz Radar Sensor Module PD detection The PD detection is on by default. In Plot. 6, the location of PD is shown. The PD threshold can be adjusted by either register configuration or resistor value adjustment in PD ckt. When the environment is bright that the sensing is above threshold, the module won't sense anything. Plot. 6 PD location Module power-up sequence The module has a BIST. When powered up, GPIO output high for 3 seconds then switched to low for 1.5 seconds, then it enters normal sensing mode. Plot. 7 shows the power sequence: vcc GPIO 3S 1.5 S When sensed, OUT=1;when no sense, OUT=0 Plot. 7 power-up sequence Sensing distance The module's detection sensitivity can be adjusted by resistors. The maximum distance is 10 m. Below plot illustrates a typical detection range. If the threshold is set high, the detection range will be larger. In Plot. 9, dark zone means high sensitive areas that an fully detect movements. Light zone basically can detect movements but not always guaranteed. Version 1.0 Plot. 9 detection range (Unit: m) Page 7 Attention 5.8GHz Radar Sensor Module Metal should be avoided on top of the antenna under installation which would result in signal shielding. Plastic or glass is acceptable while distancing on top of the antenna should be maintained. Large metallic instruments or infrastructures should be avoided right to the radar antenna. Parallel arrangement should be maintained under multiple radar modules installment. 1m distance should be kept between modules. The module is not suggested in applications near power switches under low-power mode. Revision History Revision 1.0 1.1 Release Date 2021/09/23 2022/08/16 Description Initial version Time delay and threshold table revised FCC statements: This device complies with part 15 of the FCC rules. Operation is subject to the following two conditions: (1) this device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation. NOTE: The manufacturer is not responsible for any radio or TV interference caused by unauthorized modifications or changes to this equipment. Such modifications or changes could void the user's authority to operate the equipment. Fe deral Communication Commission (FCC) Radiation Exposure Statement When using the product, maintain a distance of 20cm from the body to ensure compliance with RF exposure requirements. FCC ID:2AVK2-AT5815B Version 1.0 Page 8