ELMOSE524.03版本中文版本

1、3-WIRE ULTRASONIC TRANSCEIVER DRIVER AND SIGNAL PROCESSORE524.03PRELIMINARY INFORMATION - AUG 01, 2011Features1高灵敏度，低噪声信号采集（0.5µVRMS）2驱动电源和信号增益可编程3支持传感器频率为58khz 48kHz4全数字信号评估可减少外部元件5可编程的阈值/时间设定为回声评价6用于回波信号输出和编程的一个有线接口7汽车保护高达40V（供应，IO）8AEC-Q100资格Applications1Ultrasonic Park Assist (USPA)2Industr

2、ial Distance Measuring3RoboticsGeneral Description集成电路实现了一个单一的收发器超声波测距检测。发射机的信道提供了可编程的功率和频率到一个中心抽头变压器。接收通道放大µV回波信号并输入到模数转换器。随后的数字滤波，获得了很好的跟踪状态的发送频率没有外部C零部件或微调。结果是回波包络信号。振荡器的频率，放大器增益和发射功率可调，通过单线的IO引脚，存储在一个嵌入式存储器。此外，12个可编程阈值/时间设置在IO引脚可用来评估回波包络信号Ordering InformationProduct IDTemp. RangePackageE524

3、.03-40°C to +85°CQFN20L5Bumper moduleUS-TransducerRTD1CTD1RAINCAINDRV1DRV2AINGAINSRSUPDSUPVSUPVDDDCVDDDRPCSUP1CSUP2BodyControlE524.03UnitRIO_PUTDORIO_SIOTCKCICIO1CIO2TDITMSVDDAGNDAGNDDGNDPTMENCVDDAThis document contains information on a pre-production product. ELMOS Semiconductor AG reserv

4、es the right to change specifications and information herein without notice.ELMOS SEMICONDUCTOR AGDATA SHEETQM-NO.: 25DS0068E.001/343-Wire Ultrasonic Transceiver Driver and Signal Processor E524.03PRELIMINARY INFORMATION - AUG 01, 2011No.DescriptionConditionSymbolMinTypMaxUnit1Serial resistor inRSUP

5、131517Ohmsupply line2Reverse polarityDSUPe.g. BAS321-protection diode3Blocking capacitorCSUP11.52.22.9nFfor supply line4Blocking capacitorCSUP2150220300nFfor supply line5Filter resistor for>250mWRSUP_TD738291Ohmtransducer tank6Tank capacitor forCSUP_TD7010010uFtransducer7Clamping zenerZD_TD-e.g.2

6、5-Vdiode to protectDRV1,2 voltagesto exceed 40V 1)8Serial resistor forRIO_S0.911.1kOhmIO line9Pull up resistor forRIO_PU91011kOhmIO line10Capacitor for IOCIO1230330430pFline11Capacitor for IOCIO21.52.22.9nFline12Filter capacitor forpayCAIN171013pFtransducer signalattention tovoltagerange13Filter res

7、istor forpayRAIN90100110Ohmtransducer signalattention topowerdissipation14AC couplingpayCAIN2325470620pFcapacitor forattention totransducer signalvoltagerange15Blocking capacitorCVDDA70100130nFfor analog supply16Blocking capacitorCVDDD70100130nFfor digital supply17TransducerRTDadjust toresonancetran

8、sducerresistor18TransducerCTDadjust toresonancetransducercapacitorTable 1: device values1) please see also Fig. 5.2-1This document contains information on a product under development. ELMOS Semiconductor AG reserves the right to change or discontinue this product without notice.ELMOS Semiconductor A

9、GData Sheet 2 / 34Qm-No.: 25DS0068E.003-Wire Ultrasonic Transceiver Driver and Signal Processor E524.03PRELIMINARY INFORMATION - AUG 01, 20111 Package and Pinout5.2 Pin DescriptionNoNameTypeDescription1ncnot connected to device, should be connected to PCB-GND, as shield2AINSPositive signal input3AIN

10、GNegative signal input4GNDAAnalog ground5VDDAInternal analog supply voltage6DRV1Driver output 17GNDPPower ground for driver and IO-Interface8DRV2Driver output 29ncnot connected to device, should be connected to PCB-GND, as shield10IOBidirectional interface11VSUPSupply Voltage12VDDDInternal digital s

11、upply voltage13GNDDDigital ground14TDOJTAG data output15TDIJTAG data input16TCKJTAG clock17ncnot connected to device, should be connected to PCB-GND18ncnot connected to device, should be connected to PCB-GND19TMSJTAG select20TMENTest mode enable21EDPexposed die pad, has to be connected to PCB-GNDTab

12、le 1.1-1: Pin DescriptionExplanation of Types:A = Analog, D = Digital, S = Supply, I = Input, O = Output, B = Bidirectional, HV = High Voltage1. Package Reference设备组装在一个qfn20l4包根据JEDEC标准mo-220，K的问题，六月2006。参考JEDEC的变体是vggd-5。This document contains information on a product under development. ELMOS Semi

13、conductor AG reserves the right to change or discontinue this product without notice.ELMOS Semiconductor AGData Sheet 3 / 34Qm-No.: 25DS0068E.003-Wire Ultrasonic Transceiver Driver and Signal Processor E524.03PRELIMINARY INFORMATION - AUG 01, 20115.3 Package Pinout2019181716TMENTMSncncTCK1nc21 EDPTD

14、I 152AINSTDO 143 AINGGNDD 134GNDAVDDD 125VDDAVSUP 11DRV1GNDPDRV2ncIO678910Fig. 1.3-1: Package Pinout for QFN20L4 (top view)This document contains information on a product under development. ELMOS Semiconductor AG reserves the right to change or discontinue this product without notice.ELMOS Semicondu

15、ctor AGData Sheet 4 / 34Qm-No.: 25DS0068E.003-Wire Ultrasonic Transceiver Driver and Signal Processor E524.03PRELIMINARY INFORMATION - AUG 01, 20115 Functional Description5.1 Supply and BiasBumper moduleE524.03VDDD regulatorVDDDCVDDDGNDDVDDA regulatorGNDVDDACVDDAGNDABIAS generatorGNDSupply and BiasF

16、ig. 5.1-1: block diagram of supply and bias该块的功能是：芯片内部模拟电源的产生芯片内部数字部分的生成芯片内部使用的参考和偏置电流的产生同时，模拟电源VDDA以及数字电源VDDD，需要外部电容器cvdda和cvddd。建议把外部电容尽量靠近相关引脚vddx和gndx。VDDA和VDDD不能供应任何外部元件。万一VDDA VDDD短路或接地，输出电流将被限制在ivdda，短暂的分别ivddd，短。This document contains information on a product under development. ELMOS Semicon

17、ductor AG reserves the right to change or discontinue this product without notice.ELMOS Semiconductor AGData Sheet 11 / 34Qm-No.: 25DS0068E.003-Wire Ultrasonic Transceiver Driver and Signal Processor E524.03PRELIMINARY INFORMATION - AUG 01, 20115.3 Transducer Driver变压器的中心抽头连接到尾销。当变频器驱动的“发送请求命令激活，引脚d

18、rv1和drv2绑在内部开关接地ES交替驱动输出频率fdrv。电流通过变压器，从而使换能器功率控制由内部电流源。输出周期数被定义为测量配置，可以被设置为8或16。驱动电流离子推进是由位drv_cur 3:0。驱动电流离子推进和位drv_cur 3:0之间的关系由下式给出：频率fdrv可通过EEPROM位f_drv_adj 6:0 调整。保证调整范围定义的最小和最大频率，频率，典型的stepwidth定义为lsbf_osc，典型值。我的频率的严格单调增加f_drv_adj 6:0 价值增加。在交货前的频率调整的频率。设置f_drv_adj 6:0 = 0对应于最低频率的M可能比频率低得多，至少程

19、序调整频率应如下：2. 读f_drv_adj 6:0 的实际价值3. 测量实际频率4. 计算差异fdiff =目标频率的实际频率5. 计算粗糙数对应fdiff由n = fdiff / lsbf_osc步骤，典型值6. 通过调整f_drv_adj 6:0 7. 重复，直到达到目标频率8. 商店f_drv_adj 6:0 由EE编程命令设置（EE写影响所有其他频率相关功能的驱动频率校准命令，输出（例如驱动器把频率、通信时序），对f_drv_adj 6:0 新的设置将EE编程命令只有在激活）备注：沟通的时机是基于fdrv，从而激活另一个fdrv EE编程的时间变化的通信。缺少参考显示简化信号曲线在销

20、drv1和drv2之前和期间传输。当驱动换能器的电压引脚drv1和drv2超过电源电压VSUP.从而激活传感器（通过发送“发送请求命令）在电源电压接近尾的绝对最大额定值可能会危害IC。一个建议的对策是使用齐纳二极管箝位zd_td。voltageVSUPtime1/fDRVstart of transmissionVoltage at pin DRV1Voltage at pin DRV2Fig. 5.2-1: Simplified signal curves at pins DRV1 and DRV2This document contains information on a product

21、 under development. ELMOS Semiconductor AG reserves the right to change or discontinue this product without notice.ELMOS Semiconductor AGData Sheet 12 / 34Qm-No.: 25DS0068E.003-Wire Ultrasonic Transceiver Driver and Signal Processor E524.03PRELIMINARY INFORMATION - AUG 01, 20115.4 ReceiverAINSAMPADI

22、GITALsignal lineDFilterCOMPAINGCReceiverAMP GAIN3:0INC BWTHRESnEEPROMCONTROLFig. 5.3-1: Block diagram of Receiving Path5.3.1 Amplifier该放大器的增益可以通过比特amp_gain 3:0编程。使用以下公式计算总增益：提高在短距离目标的检测性能，增益可通过在测量点设置减少了配置。激活的增益减少，降低增益的值红色。放大器的输入设计差异，以尽量减少不必要的信号拾取。目标应作为信号输入香港作为信号地。This document contains information o

23、n a product under development. ELMOS Semiconductor AG reserves the right to change or discontinue this product without notice.ELMOS Semiconductor AGData Sheet 13 / 34Qm-No.: 25DS0068E.003-Wire Ultrasonic Transceiver Driver and Signal Processor E524.03PRELIMINARY INFORMATION - AUG 01, 20115.3.2 Digit

24、al filter数字滤波器的输出对应于整流信号的包络。回声的阈值信号的数字表示可以看着JTAG接口。一个数字位值对应：数字滤波器的特性取决于： “测量配置”定义的发射脉冲串脉冲数 程控滤波器的调整点filtadjust根据突发和点filtadjust数的滤波器的带宽是5.3.2-1显示表。number of burst pulsesbit FILTADJUSTbandwidth80BW,DFILT8,081BW,DFILT8,1160BW,DFILT16,0161BW,DFILT16,1Table 5.3.2-1: Bandwidth of digital filter depending

25、on configurationFig. 5.3.2-1: Filter characteristic, number of bursts=8This document contains information on a product under development. ELMOS Semiconductor AG reserves the right to change or discontinue this product without notice.ELMOS Semiconductor AGData Sheet 14 / 34Qm-No.: 25DS0068E.003-Wire

26、Ultrasonic Transceiver Driver and Signal Processor E524.03PRELIMINARY INFORMATION - AUG 01, 2011Fig. 5.3.2-2: filter characteristic, number of bursts=165.3.3 Comparator这个数字实现块比较数字滤波器的输出到一个控制单元寄存器提供的阈值。根据集成电路的工作模式和配置，有一个丰富的提供阈值编程。比较器的输出被传递给控制单元。5.3.3.1 functionality in SEND and RECEIVE mode发送或接收模式与相应

27、的命令（上升沿输入端或tsnd TREC）。在发送和接收模式，一个过滤器的输出信号超过比较器的阈值，表示一个接收到的回声。在发送和接收模式中通过对比较器的阈值是时间的函数。T他的功能是由： 初始值 高达14的阈值，通过线性插值连接 附加偏移 缩放因子只要在发送或接收模式的集成电路工作，没有指示，在输入输出接口接受。该接口是准备接受新的指令，当一个高层次的仍然在引脚输出或者至少是原因后，发送或接收模式退出。该集成电路提供了几个可编程的机会，为个人配置的阈值函数：This document contains information on a product under development. E

28、LMOS Semiconductor AG reserves the right to change or discontinue this product without notice.ELMOS Semiconductor AGData Sheet 15 / 34Qm-No.: 25DS0068E.003-Wire Ultrasonic Transceiver Driver and Signal Processor E524.03PRELIMINARY INFORMATION - AUG 01, 2011INTERVAL LENGTH, bit THRES_LEN在发送或接收模式时，该集成

29、电路的工作分为15个间隔。这些间隔的时间点的选择thres_len。此外，偏移值的阈值函数离子是受这一点影响的。THRES_LENfunctionrange0短的时间间隔选择，阈值偏移设置为高值= 62short range1长间隔选择，阈值偏移设置为低值= 31long rangeTable 5.3.3.1-1: function of bit THRES_LEN进一步的，间隔的线性依赖于选定的换能器频率fdrv。可编程阈值thres1 - thres14在相应区间的结束。在区间的阈值进行评估的前一个时间间隔的结束值的线性插值。初始值是有效的完整的时间间隔0。表5.3.3.1-2显示区间在点

30、thres_len依赖两个不同的频率，并给出相应的登记程序thresn阈值指数。IntervalthresholdInterval msInterval msInterval msInterval msnameexponentshort rangeshort rangelong rangelong rangefDRV=48kHzfDRV=58kHzfDRV=48kHzfDRV=58kHz0initial0 - 2.00 - 1.660 - 2.00 - 1.661THRES12.0 -3.01.66- 2.482.0- 4.01.66- 3.312THRES23.0- 4.02.48- 3.3

31、14.0- 6.03.31- 4.973THRES34.0- 5.03.31- 4.146.0- 8.04.97- 6.624THRES45.0- 6.04.14- 4.978.0 - 10.06.62- 8.285THRES56.0- 7.04.97- 5.7910.0- 12.08.28- 9.936THRES67.0- 8.05.79- 6.6212.0- 14.09.93 - 11.597THRES78.0- 9.06.62- 7.4514.0- 16.011.59- 13.248THRES89.0 - 10.07.45- 8.2816.0- 18.013.24- 14.909THRE

32、S910.0- 11.08.28- 9.1018.0- 21.014.90- 17.3810THRES1011.0- 12.09.10- 9.9321.0- 24.017.38- 19.8611THRES1112.0- 13.09.93 - 10.7624.0- 27.019.86- 22.3412THRES1213.0- 14.010.76- 11.5927.0- 30.022.34- 24.8313THRES1314.0- 15.011.59- 12.4130.0- 33.024.83- 27.3114THRES1415.0- 18.012.41- 14.9033.0- 36.027.31

33、- 29.79Table 5.3.3.1-2: Intervals depending on selected range and FDRVThreshold values, initial and THRES1 - THRES14阈值从编程thresn造成指数可以由以下的计算公式：表5.3.3.1-3表演产生的阈值取决于thresn编程和相应的电压。This document contains information on a product under development. ELMOS Semiconductor AG reserves the right to change or d

34、iscontinue this product without notice.ELMOS Semiconductor AGData Sheet 16 / 34Qm-No.: 25DS0068E.003-Wire Ultrasonic Transceiver Driver and Signal Processor E524.03PRELIMINARY INFORMATION - AUG 01, 2011threshold exponentthreshold value without offset andtypical voltage mVscaling000158.121016.131524.

35、242133.952845.263556.574267.785080.695995.21068109.71178125.81289143.513101162.914113182.315127204.816141227.417157253.218174280.619192309.720212341.921233375.822256412.923280451.624307495.225335540.326366590.327399643.528434700.029472761.330514829.031558900.0Table 5.3.3.1-3: Threshold values result

36、ing from exponent and typical voltageINITIAL VALUE, bit THRES_INI在发送模式的初始阈值指数总是设置为31的最大值。在接收模式下，初始阈值指数点thres_ini定义。在接收模式的初始THRES_INIfunction in receive mode0初始阈值指数= 311初始阈值指数= thres1Table 5.3.3.1-4: function of bit THRES_INIThis document contains information on a product under development. ELMOS Sem

37、iconductor AG reserves the right to change or discontinue this product without notice.ELMOS Semiconductor AGData Sheet 17 / 34Qm-No.: 25DS0068E.003-Wire Ultrasonic Transceiver Driver and Signal Processor E524.03PRELIMINARY INFORMATION - AUG 01, 2011End of SEND and RECEIVE mode, THRES7 - THRES14如果选择短

38、距离，发送和接收模式结束后间隔14。如果长时间范围内发送和接收的方式结束最早的区间7和最新的后第十四区间后，根据设定值thres7-thres14。如果价值thresn，N = 8-14，设置为最大值，高于前值阈值（N1）、发送和接收模式结束后间隔N-1，别的后间隔14。长范围的例子：thres11 = 6thres12 = 31（最大值）发送或接收模式结束后间隔11。SCALING in RECEIVE mode, bits THRES_SCALE1:0在接收模式的阈值灵敏度可以增加一个缩放因子。所有的阈值定义的thres1 - thres14与缩放因子乘以。缩放因子是由乙组它的thres_

39、scale 1:0按表5.3.3.1-5。THRES_SCALE1THRES_SCALE0SCALING_FACTOR000.25010.5100.75111.0Table 5.3.3.1-5: Scaling for Receive Threshold备注：本scaling_factor在发送模式不能被修改，scaling_factor总是1阈值偏移，位thres_len发送模式中的比较器的阈值是插值阈值函数和一个附加偏移值的总和。这个偏移值是：62短距离31长距离Summarized:用于插值算法的阈值的计算如下：This document contains information on

40、a product under development. ELMOS Semiconductor AG reserves the right to change or discontinue this product without notice.ELMOS Semiconductor AGData Sheet 18 / 34Qm-No.: 25DS0068E.003-Wire Ultrasonic Transceiver Driver and Signal Processor E524.03PRELIMINARY INFORMATION - AUG 01, 2011Threshold val

41、uefor noise measurement Constant threshold value during interval 0Linear interpolationmaxThreshold valueSENDInterval 0Interval 1Interval 2Interval 3Interval 4Interval 5Interval 6Interval 7Interval 8Interval 9Interval 10Interval 11Interval 12Interval 13Interval 14timeorRECEIVErequestStart of SEND orE

42、nd of SEND orRECEIVE modeRECEIVE mode offsetFig. 5.3.3.1-1: intervals of SEND or RECEIVE mode and related threshold valuesexample 1:短距离，发送请求，thresn编程15example 2:长距离、接收请求，scaling_factor = 0.75，thresn编程7This document contains information on a product under development. ELMOS Semiconductor AG reserves

43、the right to change or discontinue this product without notice.ELMOS Semiconductor AGData Sheet 19 / 34Qm-No.: 25DS0068E.003-Wire Ultrasonic Transceiver Driver and Signal Processor E524.03PRELIMINARY INFORMATION - AUG 01, 20115.3.3.2 NOISE measurement during SEND and RECEIVE command随着环境噪声的增加可能会干扰发送或

44、接收模式的测量，在进入发送或接收模式时，该集成电路直接测量环境噪声的噪声。环境噪声测量公司是在发送或接收命令的低相位期间进行（tsnd / TREC）。数字滤波器的输出进行比较，从控制单元通过比较阈值转子。阈值可以根据表位5.3.3.2-1的noise_cfg 1:0选择。NOISE_CFG1NOISE_CFG0threshold value00在先前发送或接收模式结束时的阈值，但scaling_factor固定为101621012411620Table 5.3.3.2-1: 噪声测量取决于比特noise_cfg 1:0阈值用输入输出命令“读取状态”，可以读取噪声信息。“电源后的第一噪声测量的阈值值为1023。噪声测量的结果是由状态寄存器输出。5.4 Masking of comparator output比较器的输出可以被屏蔽的时间tcmask数字滤波的阈值低于比较器输出信号后。如果集成电路是操作的智慧，这个功能可能是有用的高增益和低比较器阈