A111 – Pulsed Coherent Radar (PCR) Datasheet v1.5.
A111 Pulsed Coherent Radar (PCR) Datasheet, v1.5.2 A111 Overview The A111 is a radar system based on pulsed coherent radar (PCR) technology and is setting a new benchmark for power consumption and distance 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, RF front-end and Antenna in Package (AiP).
A111 Pulsed Coherent Radar (PCR) Datasheet, v1.5.2 Table of Contents 1 Revision History ............................................................................................................................ 4 2 Description ..................................................................................................................................... 5 2.1 Functional Block Diagram ...................................................................................................
A111 Pulsed Coherent Radar (PCR) Datasheet, v1.5.2 1 Revision History Revision Comment V1.0 Released version V1.1 Minor reference correction in chapter 5.1. A111 marking info added in chapter 2. V1.2 Relative phase accuracy added in chapter 6.3 V1.3 Ordering information added in chapter 2. Equation corrected in XTAL chapter 8.1. V1.4 FCC & ISED regulatory approval added, chapter 9.0. V1.5.1 Added in chapter 9.1.1 : RF exposure has been calculation for 20 cm separation I.e. Mobile devices.
A111 Pulsed Coherent Radar (PCR) Datasheet, v1.5.2 2 Description The A111 is an optimized low-power, high-precision, 60 GHz radar sensor with integrated Baseband, an RF front-end and an Antenna in Package (AIP). The 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 highaccuracy, high-resolution sensing systems with low-power consumption.
A111 Pulsed Coherent Radar (PCR) Datasheet, v1.5.2 2.1 Functional Block Diagram A111 One Package Solution A111 Silicon Digital Communication SPI (4) INTERRUPT XIN (ref clk) XOUT mmWave Radio Program memory TX Rx an t. RX Data memory Power 1.8V Single power supply Tx ant. Timing LDOs PLL ENABLE PoR Figure 2.1. The A111 functional block diagram. The A111 silicon is divided into four functional blocks: Power, Digital, Timing and mmWave radio.
A111 Pulsed Coherent Radar (PCR) Datasheet, v1.5.2 3 Pin Configuration and Functions The below figure shows the A111 pin configuration, top view: 1 A 3 4 5 6 7 8 9 10 NC B NC C D 2 VIO_1a VIO_2a VIO_1b GND VIO_2b E I/O F ENABLE G CLK Analog H J Supply XOUT VBIAS K SPI_SS SPI_CLK VIO_3a SPI_MISO SPI_MOSI INTERRUPT NC XIN VIO_3b Figure 3.1. Pin configuration of the A111 sensor, top view.
A111 Pulsed Coherent Radar (PCR) Datasheet, v1.5.2 Pin Pin name Pin type Description F2, F9 GND Ground Must be connected to solid ground plane F10 ENABLE I/O Must be connected to host MCU available GPIO.
A111 Pulsed Coherent Radar (PCR) Datasheet, v1.5.2 4 Specifications 4.1 Absolute Maximum Ratings The below table shows the A111 absolute maximum ratings over operating temperature range, on package, unless otherwise noted: Parameter Description Min. Max. Unit VIO_1 (2) 1.8 V RF power supply 0 2.0 V VIO_2 (2) 1.8 V RF power supply 0 2.0 V VIO_3 1.8 V digital power supply 0 2.0 V XIN (1) Clock input port for crystal or reference clock -0.5 1.6 V I/O I/O supply voltage -0.
A111 Pulsed Coherent Radar (PCR) Datasheet, v1.5.2 4.3 Recommended Operating Conditions The below table shows the A111 recommended operating conditions, on package: Parameter Min. Typ. Max. Unit Operating power supply voltage, VIO_1 1.71 1.8 1.89 V Operating power supply voltage, VIO_2 1.71 1.8 1.89 V Operating power supply voltage VIO_3 1.71 1.8 1.89 V I/O operating range -0.3 VIO_3+0.3 V XIN operating range (1) -0.3 1.2 V Operating temperature -40 85 ºC Table 4.3.
A111 Pulsed Coherent Radar (PCR) Datasheet, v1.5.2 The below table shows the A111 electrical AC specification conditions, on package, at TA = 25ºC: Parameter Min. Max. Unit I/O output operating frequency 100 MHz I/O load capacitance 20 pF 80(1) MHz XIN operating frequency Typ. 20 XIN pin capacitance 0.2 pF Table 4.5 Electrical AC conditions (1) The maximum external reference clock frequency is 80 MHz and the maximum XTAL frequency is 50 MHz. 4.
A111 Pulsed Coherent Radar (PCR) Datasheet, v1.5.2 5 Timing Requirements 5.1 Serial Peripheral Interface The Serial Peripheral Interface (SPI) is a 4-wire serial bus, used for configuration and reading output from the A111 radar sensor. The A111 radar sensor is an SPI slave device connected to the SPI master, as described in figure 5.1. The A111 allows several devices to be connected on the same SPI bus, with a dedicated slave-select signal. Daisy-chain is not supported.
A111 Pulsed Coherent Radar (PCR) Datasheet, v1.5.2 Parameter Min. Typ. Clock frequency (1) Max. Unit 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) The 50 MHz clock frequency requires that the reference clock is at least 20.
A111 Pulsed Coherent Radar (PCR) Datasheet, v1.5.2 6 Typical Characteristics 6.1 Distance Accuracy Conditions: TA = 25 ºC, VDD = 1.8 V. Statistical result based on sweep count 100, 20 tested devices. The below figure shows the standard deviation of distance estimation, configuration with maximize on depth resolution used, 0.06-0.30 m. Object metal cylinder, 40 mm in diameter. Figure 6.1. Standard deviation of distance estimation, maximize on depth resolution 0.06-0.30 m.
A111 Pulsed Coherent Radar (PCR) Datasheet, v1.5.2 6.2 Amplitude Accuracy Conditions: TA = 25 ºC, VDD = 1.8 V. Statistical result based on sweep count 100, 20 tested devices. The below figure shows the standard deviation of amplitude estimation, configuration with maximize on depth resolution used, 0.06-0.30 m. Object metal cylinder 40 mm diameter. Figure 6.3. Standard deviation of amplitude estimation, maximize on depth resolution 0.06-0.30 m.
A111 Pulsed Coherent Radar (PCR) Datasheet, v1.5.2 6.4 Half Power Beamwidth (HPBW) Conditions: TA = 25 ºC, VDD = 1.8 V. Statistical result based on sweep count 100 (20 tested devices). This section shows the A111 Elevation plane (E-plane) and Horizontal plane (H-plane) radiation pattern. The below figure shows the normalized radiation pattern at E-plane, configuration with maximize on depth resolution used, with a 5 cm radius spherical metal corner reflector.
A111 Pulsed Coherent Radar (PCR) Datasheet, v1.5.2 7 Functional Description The below figure shows the A111 system integration with Host MCU: 1.8V single power supply Host MCU SPI x4 ENABLE x1 INTERRUPT x1 A111 Sensor TCXO CLK ref. 20-80 MHz Figure 7.1. System integration The Acconeer software is executed on Host MCU that handles sensor initiation, configuration, sweep acquisition and signal processing.
A111 Pulsed Coherent Radar (PCR) Datasheet, v1.5.2 7.1 Software Architecture The Acconeer software has been written in C and is portable to any OS and HW platform. The Acconeer software is executed on Host MCU and delivered as binaries, except for driver software that is delivered as source code. The Acconeer software also provides example applications as reference source code for utilizing various Acconeer Services and Detectors, to facilitate customer software development on application level.
A111 Pulsed Coherent Radar (PCR) Datasheet, v1.5.2 Acconeer also provides detectors, such as a distance detector where the application can push service data to retrieve data result. 7.2 Devices and Drivers The driver for SPI and INTERRUPT shall implement the defined functions found in the corresponding device header file, acc_device_spi.h and acc_device_gpio.h. Registration of these functions shall be done in the acc_board_init function, see chapter 7.3 for details. 7.
A111 Pulsed Coherent Radar (PCR) Datasheet, v1.5.2 7.4 Power Up Sequence The power-up sequence is described using the recommended integration shown in the below figure: 1.8V R2 C4 INTERRUPT A111 SPI_SS R1 VIO_2a,b SPI_MISO VIO_3a,b SPI_MOSI VBIAS SPI_CLK XIN ENABLE XOUT C5 C1 C2 C6 C3 GNDs Host VIO_1a,b X1 C7 C8 Figure 7.3. Recommended integration of the A111 radar sensor. The power up sequence is shown in below figure. t1 t2 VIO_1-3a,b ENABLE XIN SPI_SS Time Figure 7.4.
A111 Pulsed Coherent Radar (PCR) Datasheet, v1.5.2 It is recommended to allow the supply voltage on the sensor to stabilize before activating ENABLE. That is shown as the time t1 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 t2 in figure 7.4. This may take up to several milliseconds depending on the XTAL performance.
A111 Pulsed Coherent Radar (PCR) Datasheet, v1.5.2 8 Layout Recommendations A111 sensor free space integration should take the following into consideration: • Any material above the sensor should have as low permittivity and loss as possible, e.g. plastic or glass with low permittivity. • To conclude on optimum distance from the sensor, a simulation/measurement investigation is required.
A111 Pulsed Coherent Radar (PCR) Datasheet, v1.5.2 The below table shows BOM for integration of the A111: Component Value Description C1, C2, C3 100 nF VIO_1, VIO_2, VIO_3 decoupling C4, C5, C6 1 µF VIO_1, VIO_2, VIO_3 decoupling R2 100 kΩ INTERRUPT pull down resistor R1 30 Ω SPI_MISO series resistance (optional) X1 C7, C8 XTAL 24 MHz, Epson TSX-3225 (optional) 8 pF (1) XTAL freq. tuning capacitor (optional) Table 8.2 BOM list (1) See details in chapter 7.
A111 Pulsed Coherent Radar (PCR) Datasheet, v1.5.2 8.1 XTAL The input clock can origin from a crystal (XTAL), connected to XIN and XOUT. The A111 sensor has a built-in XTAL oscillator and by adding an external XTAL component, as shown the below figure 8.1, a reference design without any external clock reference supplied is possible. Note however, that the external clock reference still is supported and if used instead of an external XTAL, it is connected to XIN pin.
A111 Pulsed Coherent Radar (PCR) Datasheet, v1.5.2 8.2 External clock source The input clock can origin from an 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. Unit 1000 -80 dBc/Hz 10 000 -100 dBc/Hz 100 000 -120 dBc/Hz 1 000 000 -140 dBc/Hz 10 000 000 -155 dBc/Hz Table 8.
A111 Pulsed Coherent Radar (PCR) Datasheet, v1.5.2 9 Regulatory Approval The A111 sensor is designed to meet the RF requirements for FCC (US) and IC (Canada) for the 60 GHz band as described below. To be noted is that some regulatory specifications also specify the usage 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 FCC Approval Final FCC approval is pending.
A111 Pulsed Coherent Radar (PCR) Datasheet, v1.5.2 9.2 Industry Canada Approval Final Industry Canada (IC) approval is pending. The A111 sensor module meets the radio requirements for the 57-64 GHz band for the following type of applications: - field disturbance sensor employed for fixed operations IC certification number: 24388-A111 L’approbation finale Industry Canada (IC) reste en instance.
A111 Pulsed Coherent Radar (PCR) Datasheet, v1.5.2 10 Mechanical Data The A111 is available in fcCSP package for mounting 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 0.821 0.899 mm Body Z (height) Pitch 0.45 0.50 0.55 mm Pin diameter 0.25 0.30 0.35 mm Pin height 0.15 0.24 mm 50 mm Ball count Table 9.1. Mechanical data The A111 footprint is shown in Figure 9.1. Figure 9.1.
A111 Pulsed Coherent Radar (PCR) Datasheet, v1.5.2 The physical layout of the A111 sensor is shown in Figure 9.2, 9.3 and 9.4. Figure 9.2. Physical layout of the A111 sensor, top view. Figure 9.3. Physical layout of the A111 sensor, side view.
A111 Pulsed Coherent Radar (PCR) Datasheet, v1.5.2 Primary datum C and seating plane are defined by the spherical crowns of the solder pins. Dimension is measured at the maximum solder pin diameter, parallel to primary datum C. All dimensions and tolerances conform to ASME Y14.5 – 2009. Figure 9.4. Physical layout of the A111 sensor, bottom view. The bottom view shows 50 solder pins. The pitch of the BGA pins is 500 µm, the pin diameter is 300 µm ±5 µm and the collapsed pin height is 0.244 ± 0.050 mm.
A111 Pulsed Coherent Radar (PCR) Datasheet, v1.5.
A111 Pulsed Coherent Radar (PCR) Datasheet, v1.5.2 Disclaimer The information herein is believed to be correct as of the date issued. Acconeer AB (“Acconeer”) will not be responsible for damages of any nature resulting from the use or reliance upon the information contained herein. Acconeer makes no warranties, expressed or implied, of merchantability or fitness for a particular purpose or course of performance or usage of trade.
