1、3-WIRE ULTRASONIC TRANSCEIVER DRIVER AND SIGNAL PROCESSORE524.03PRELIMINARY INFORMATION - AUG 01, 2011Features1高靈敏度，低噪聲信號采集（0.5µVRMS）2驅動電源和信號增益可編程3支持傳感器頻率為58khz 48kHz4全數字信號評估可減少外部元件5可編程的閾值/時間設定為回聲評價6用于回波信號輸出和編程的一個有線接口7汽車保護高達40V（供應，IO）8AEC-Q100資格Applications1Ultrasonic Park Assist (USPA)2Industr

2、ial Distance Measuring3RoboticsGeneral Description集成電路實現了一個單一的收發器超聲波測距檢測。發射機的信道提供了可編程的功率和頻率到一個中心抽頭變壓器。接收通道放大µV回波信號并輸入到模數轉換器。隨后的數字濾波，獲得了很好的跟蹤狀態的發送頻率沒有外部C零部件或微調。結果是回波包絡信號。振蕩器的頻率，放大器增益和發射功率可調，通過單線的IO引腳，存儲在一個嵌入式存儲器。此外，12個可編程閾值/時間設置在IO引腳可用來評估回波包絡信號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設備組裝在一個qfn20l4包根據JEDEC標準mo-220，K的問題，六月2006。參考JEDEC的變體是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該塊的功能是：芯片內部模擬電源的產生芯片內部數字部分的生成芯片內部使用的參考和偏置電流的產生同時，模擬電源VDDA以及數字電源VDDD，需要外部電容器cvdda和cvddd。建議把外部電容盡量靠近相關引腳vddx和gndx。VDDA和VDDD不能供應任何外部元件。萬一VDDA VDDD短路或接地，輸出電流將被限制在ivdda，短暫的分別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變壓器的中心抽頭連接到尾銷。當變頻器驅動的“發送請求命令激活，引腳d

18、rv1和drv2綁在內部開關接地ES交替驅動輸出頻率fdrv。電流通過變壓器，從而使換能器功率控制由內部電流源。輸出周期數被定義為測量配置，可以被設置為8或16。驅動電流離子推進是由位drv_cur 3:0。驅動電流離子推進和位drv_cur 3:0之間的關系由下式給出：頻率fdrv可通過EEPROM位f_drv_adj 6:0 調整。保證調整范圍定義的最小和最大頻率，頻率，典型的stepwidth定義為lsbf_osc，典型值。我的頻率的嚴格單調增加f_drv_adj 6:0 價值增加。在交貨前的頻率調整的頻率。設置f_drv_adj 6:0 = 0對應于最低頻率的M可能比頻率低得多，至少程

19、序調整頻率應如下：2. 讀f_drv_adj 6:0 的實際價值3. 測量實際頻率4. 計算差異fdiff =目標頻率的實際頻率5. 計算粗糙數對應fdiff由n = fdiff / lsbf_osc步驟，典型值6. 通過調整f_drv_adj 6:0 7. 重復，直到達到目標頻率8. 商店f_drv_adj 6:0 由EE編程命令設置（EE寫影響所有其他頻率相關功能的驅動頻率校準命令，輸出（例如驅動器把頻率、通信時序），對f_drv_adj 6:0 新的設置將EE編程命令只有在激活）備注：溝通的時機是基于fdrv，從而激活另一個fdrv EE編程的時間變化的通信。缺少參考顯示簡化信號曲線在銷

20、drv1和drv2之前和期間傳輸。當驅動換能器的電壓引腳drv1和drv2超過電源電壓VSUP.從而激活傳感器（通過發送“發送請求命令）在電源電壓接近尾的絕對最大額定值可能會危害IC。一個建議的對策是使用齊納二極管箝位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該放大器的增益可以通過比特amp_gain 3:0編程。使用以下公式計算總增益：提高在短距離目標的檢測性能，增益可通過在測量點設置減少了配置。激活的增益減少，降低增益的值紅色。放大器的輸入設計差異，以盡量減少不必要的信號拾取。目標應作為信號輸入香港作為信號地。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數字濾波器的輸出對應于整流信號的包絡?；芈暤拈撝敌盘柕臄底直硎究梢钥粗鳭TAG接口。一個數字位值對應：數字濾波器的特性取決于： “測量配置”定義的發射脈沖串脈沖數 程控濾波器的調整點filtadjust根據突發和點filtadjust數的濾波器的帶寬是5.3.2-1顯示表。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這個數字實現塊比較數字濾波器的輸出到一個控制單元寄存器提供的閾值。根據集成電路的工作模式和配置，有一個豐富的提供閾值編程。比較器的輸出被傳遞給控制單元。5.3.3.1 functionality in SEND and RECEIVE mode發送或接收模式與相應

27、的命令（上升沿輸入端或tsnd TREC）。在發送和接收模式，一個過濾器的輸出信號超過比較器的閾值，表示一個接收到的回聲。在發送和接收模式中通過對比較器的閾值是時間的函數。T他的功能是由： 初始值 高達14的閾值，通過線性插值連接 附加偏移 縮放因子只要在發送或接收模式的集成電路工作，沒有指示，在輸入輸出接口接受。該接口是準備接受新的指令，當一個高層次的仍然在引腳輸出或者至少是原因后，發送或接收模式退出。該集成電路提供了幾個可編程的機會，為個人配置的閾值函數：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在發送或接收模式時，該集成

29、電路的工作分為15個間隔。這些間隔的時間點的選擇thres_len。此外，偏移值的閾值函數離子是受這一點影響的。THRES_LENfunctionrange0短的時間間隔選擇，閾值偏移設置為高值= 62short range1長間隔選擇，閾值偏移設置為低值= 31long rangeTable 5.3.3.1-1: function of bit THRES_LEN進一步的，間隔的線性依賴于選定的換能器頻率fdrv。可編程閾值thres1 - thres14在相應區間的結束。在區間的閾值進行評估的前一個時間間隔的結束值的線性插值。初始值是有效的完整的時間間隔0。表5.3.3.1-2顯示區間在點

30、thres_len依賴兩個不同的頻率，并給出相應的登記程序thresn閾值指數。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閾值從編程thresn造成指數可以由以下的計算公式：表5.3.3.1-3表演產生的閾值取決于thresn編程和相應的電壓。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在發送模式的初始閾值指數總是設置為31的最大值。在接收模式下，初始閾值指數點thres_ini定義。在接收模式的初始THRES_INIfunction in receive mode0初始閾值指數= 311初始閾值指數= 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如果選擇短

38、距離，發送和接收模式結束后間隔14。如果長時間范圍內發送和接收的方式結束最早的區間7和最新的后第十四區間后，根據設定值thres7-thres14。如果價值thresn，N = 8-14，設置為最大值，高于前值閾值（N1）、發送和接收模式結束后間隔N-1，別的后間隔14。長范圍的例子：thres11 = 6thres12 = 31（最大值）發送或接收模式結束后間隔11。SCALING in RECEIVE mode, bits THRES_SCALE1:0在接收模式的閾值靈敏度可以增加一個縮放因子。所有的閾值定義的thres1 - thres14與縮放因子乘以?？s放因子是由乙組它的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備注：本scaling_factor在發送模式不能被修改，scaling_factor總是1閾值偏移，位thres_len發送模式中的比較器的閾值是插值閾值函數和一個附加偏移值的總和。這個偏移值是：62短距離31長距離Summarized:用于插值算法的閾值的計算如下：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:短距離，發送請求，thresn編程15example 2:長距離、接收請求，scaling_factor = 0.75，thresn編程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隨著環境噪聲的增加可能會干擾發送或

44、接收模式的測量，在進入發送或接收模式時，該集成電路直接測量環境噪聲的噪聲。環境噪聲測量公司是在發送或接收命令的低相位期間進行（tsnd / TREC）。數字濾波器的輸出進行比較，從控制單元通過比較閾值轉子。閾值可以根據表位5.3.3.2-1的noise_cfg 1:0選擇。NOISE_CFG1NOISE_CFG0threshold value00在先前發送或接收模式結束時的閾值，但scaling_factor固定為101621012411620Table 5.3.3.2-1: 噪聲測量取決于比特noise_cfg 1:0閾值用輸入輸出命令“讀取狀態”，可以讀取噪聲信息。“電源后的第一噪聲測量的閾值值為1023。噪聲測量的結果是由狀態寄存器輸出。5.4 Masking of comparator output比較器的輸出可以被屏蔽的時間tcmask數字濾波的閾值低于比較器輸出信號后。如果集成電路是操作的智慧，這個功能可能是有用的高增益和低比較器閾