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Acconeer A111 Скачать руководство пользователя страница 20

A111 Pulsed Coherent Radar (PCR)
Datasheet, v1.8

© 2019 Copyright by Acconeer

2019-06-12

Page 20 of 34

It is recommended to allow the supply voltage on the sensor to stabilize before activating ENABLE.
That is shown as the time

t

1

in figure 7.4 and the actual time depends on the power supply and the

value of the decoupling capacitors.

Next step in the power up sequence is to have a settling time for the XTAL oscillator to stabilize,
shown as time

t

2

in figure 7.4. This may take up to several milliseconds depending on the XTAL

performance. The sensor does not require any settling time if it is integrated using an external
reference clock. It is advised to have the clock inactive at 0 V while ENABLE is inactive.

Now the A111 radar sensor is ready for SPI communication. All I/Os must never exceed VIO_3
voltage, accordingly if VIO_3 voltage is set to 0V between sensor usage then all I/Os must also be set
to 0V. Otherwise, the internal ESD protection diodes will draw current from the I/O source.

After power up is complete, the sensor is loaded with a program. Up until the point where the sensor’s
program is started, the INTERRUPT is high impedance. However, after the sensor’s program has
started the INTERRUPT is configured to a push-pull CMOS output. Therefore it is required that the
host I/O is configured as input before any programs are started on the sensor.

The power down sequence is recommended to be executed in the reverse order as the power up
sequence: First ensure that all I/O inputs are at 0V which includes ENABLE, after that all VIO1_3a,b
can be turned off.

VIO_1 and VIO_2 must never have higher voltage than VIO_3, and it is recommended to
enable/disable the three supplies simultaneously.

External clock reference, if used, needs always to be available to sensor.

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Содержание A111

Страница 1: ...A111 Pulsed Coherent Radar PCR Datasheet v1 8...

Страница 2: ...nce accuracy fully integrated in a small package of 29 mm2 The A111 60 GHz radar system is optimized for high precision and ultra low power delivered as a one package solution with integrated Baseband...

Страница 3: ...2 5 1 Serial Peripheral Interface 12 6 Typical Characteristics 14 6 1 Distance Accuracy 14 6 2 Amplitude Accuracy 15 6 3 Relative Phase Accuracy 15 6 4 Half Power Beamwidth HPBW 16 7 Functional Descri...

Страница 4: ...6 3 V1 3 Ordering information added in chapter 2 Equation corrected in XTAL chapter 8 1 V1 4 EU declaration of conformity added chapter 9 0 Pin configuration alphabetically order corrected chapter 3 A...

Страница 5: ...he sensor is based on pulsed coherent radar PCR technology featuring a leading edge patented solution with picosecond time resolution The A111 is the perfect choice for implementing high accuracy high...

Страница 6: ...he Power functional block includes LDOs and a Power on Reset PoR block Each LDO creates its own voltage domain The PoR block generates a Reset signal on each power up cycle The host interfaces the Pow...

Страница 7: ...o connect A3 A8 GND Ground Must be connected to solid ground plane A9 GND Ground Must be connected to solid ground plane B1 NC Must no connect B2 B9 GND Ground Must be connected to solid ground plane...

Страница 8: ...nd Must be connected to solid ground plane J9 VIO_3a Supply voltage Supply voltage digital part 1 J10 XIN CLK XTAL input OR external ref clk input 1 1V domain K2 SPI_CLK I O SPI Serial Clock K3 SPI_MI...

Страница 9: ...Stresses beyond those listed in table 4 1 may cause permanent damage to the device These are stress ratings only and functional operation of the device at these conditions or at any other conditions b...

Страница 10: ...1 XIN input must not exceed 0V when ENABLE is low 4 4 Electrical Specification The below table shows the A111 electrical DC specification conditions on package at TA 25 C Parameter Min Typ Max Unit Cu...

Страница 11: ...mption continuous TX active mode 71 mA Average power consumption 0 1 Hz sweep rate 2 0 2 1 mW Average power consumption 10 Hz sweep rate 2 3 1 mW Average power consumption 100 Hz sweep rate 20 1 mW Cu...

Страница 12: ...ost SPI Master A111 SPI Slave A111 SPI Slave SPI_CLK SPI_MOSI SPI_SS1 SPI_SS2 SPI_MISO Figure 5 1 SPI master slave connection The serial data transfer input MOSI and output MISO to the A111 are synchr...

Страница 13: ...Min Typ Max Unit Clock frequency 1 50 MHz SS setup time 1 0 ns SS hold time 2 0 ns MOSI setup time 1 0 ns MOSI hold time 2 5 ns MISO propagation delay 2 5 5 ns Table 5 1 SPI timing characteristics 1...

Страница 14: ...ion configuration using envelope service with maximize depth resolution profile 0 06 0 30 m Object metal cylinder 40 mm in diameter Figure 6 1 Standard deviation of distance estimation maximize on dep...

Страница 15: ...on depth resolution 0 06 0 30 m The below figure shows the standard deviation of amplitude estimation configuration using envelope service with maximize SNR profile 1 76 2 0 m Object 5 cm radius sphe...

Страница 16: ...attern at E plane configuration using envelope service with maximize depth resolution profile with a 5 cm radius spherical metal corner reflector HPBW for E plane is 20 degrees as shown in the below f...

Страница 17: ...MCU that handles sensor initiation configuration sweep acquisition and signal processing The Serial Peripheral Interface SPI is a 4 wire serial bus used for configuration and reading output from the...

Страница 18: ...in pre defined range intervals IQ modulated data representation in cartesian etc Detectors are built on Service data as input and the output is a result E g Distance detector that presents distance an...

Страница 19: ...recommended integration shown in the below figure A111 INTERRUPT SPI_SS SPI_MISO SPI_MOSI SPI_CLK ENABLE VIO_1a b VIO_2a b VIO_3a b VBIAS XIN XOUT GNDs R1 1 8V X1 C8 C7 R2 C4 C1 C5 C2 C6 C3 Host Figu...

Страница 20: ...r exceed VIO_3 voltage accordingly if VIO_3 voltage is set to 0V between sensor usage then all I Os must also be set to 0V Otherwise the internal ESD protection diodes will draw current from the I O s...

Страница 21: ...e continuous and should have low impedance The below table shows the sensor gain loss versus solid ground plane area Ground plane area Sensor gain loss 625 mm2 0 dB 425 mm2 0 2 dB 225 mm2 0 4 dB 127 m...

Страница 22: ...ription C1 C2 C3 100 nF VIO_1 VIO_2 VIO_3 decoupling C4 C5 C6 1 F VIO_1 VIO_2 VIO_3 decoupling R2 100 k INTERRUPT pull down resistor R1 30 SPI_MISO series resistance optional X1 XTAL 24 MHz Epson TSX...

Страница 23: ...onnected to XIN C7 C8 GND GND GND XOUT XIN TSX 3225 XTAL 26 MHz I O GND I O GND Figure 8 1 External XTAL schematics To enable the internal XTAL oscillator to drive the external resonator the relation...

Страница 24: ...external clock source connected to XIN with XOUT left open As an example given in table 8 3 maximum phase noise figures are given using 40 MHz external clock reference Offset frequency Hz Min Typ Max...

Страница 25: ...cification for VIO_3 Low cost LC filter solution Acconeer provides recommended low cost LC filter solution the recommended filter is displayed in figure 8 2 The values of the component demonstrate an...

Страница 26: ...A111 Pulsed Coherent Radar PCR Datasheet v1 8 2019 Copyright by Acconeer 2019 06 12 Page 26 of 34 Figure 8 3 Simulated performance with 10mVpp supply ripple with low cost LC supply filter...

Страница 27: ...age of the sensor so users of the sensor must check regulatory requirements for their own use case and determine if the regulatory approvals described below are sufficient 9 1 ETSI Hereby Acconeer dec...

Страница 28: ...the device FCC ID 2AQ6KA1 The host product manufacturer is responsible for compliance to any other FCC rules that apply to the host not covered by the modular transmitter grant of certification 9 2 1...

Страница 29: ...A111 Pulsed Coherent Radar PCR Datasheet v1 8 Page 29 of 34 2019 06 12 2019 Copyright by Acconeer 9 2 2 FCC Grant Authorization...

Страница 30: ...unting on a substrate The below table shows mechanical data Parameter Min Typ Max Unit Body X 5 15 5 20 5 25 mm Body Y 5 45 5 50 5 55 mm Body Z height 0 821 0 899 mm Ball pitch 0 45 0 50 0 55 mm Ball...

Страница 31: ...8 Page 31 of 34 2019 06 12 2019 Copyright by Acconeer The physical layout of the A111 sensor is shown in Figure 10 2 10 3 and 10 4 Figure 10 2 Physical layout of the A111 sensor top view Figure 10 3 P...

Страница 32: ...ured at the maximum solder ball diameter parallel to primary datum C All dimensions and tolerances conform to ASME Y14 5 2009 Figure 10 4 Physical layout of the A111 sensor bottom view The bottom view...

Страница 33: ...static discharge ETSI European Telecommunications Standards Institute FCC Federal Communications Commission fcCSP Flip chip chip scale package GND Ground HAL Hardware abstraction layer HPBW Half power...

Страница 34: ...industry standard requirements Unless explicitly stated herein this document Acconeer has not performed any regulatory conformity test It is the user s responsibility to assure that necessary regulat...

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