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Texas Instruments AFE4400 Скачать руководство пользователя страница 36

AFE44x0SPO2EVM FAQs

9.3

Check TXP and TXM Waveforms

TXP and TXM waveforms are observed at TX_P (TP23) and TX_N (TP17).

shows TXP and

TXM waveforms without connecting the pulse oximeter cable.

shows TXP and TXM waveforms

after connecting the pulse oximeter cable.

Figure 40. TXP and TXM Without Pulse Oximeter Cable

Figure 41. TXP and TXM After Connecting the Pulse Oximeter Cable

36

AFE4400 and AFE4490 Development Guide

SLAU480A – January 2013 – Revised February 2013

Submit Documentation Feedback

Copyright © 2013, Texas Instruments Incorporated

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Содержание AFE4400

Страница 1: ...mum Requirements 5 3 2 Installing the Software PC Application 5 3 3 Installing the USB Drivers 9 4 Running the Software 12 4 1 Overview of the Features 12 5 AFE44x0SPO2EVM Hardware 25 5 1 Power Supply...

Страница 2: ...guration Rx Stage 17 21 AFE4400 Device Configuration Rx Stage 18 22 AFE4490 Device Configuration Timing Controls 19 23 AFE4400 Device Configuration Timing Controls 19 24 Device Configuration Low Level...

Страница 3: ...ly use the AFE44x0SPO2EVM under the following conditions The AFE44x0SPO2EVM demonstration kit is intended only for electrical evaluation of the features of the AFE44x0 devices in a laboratory simulati...

Страница 4: ...2EVM demonstration kit is shown in Figure 1 Figure 1 AFE4490SPO2EVM Demonstration Kit The board can be assembled with either of these devices Check the TI website for the AFE4400SPO2EVM and AFE4490SPO...

Страница 5: ...ndows 7 operating system as shown in Figure 2 Figure 2 Setting Font Size on Windows 7 Operating System 3 1 2 Additional Software Requirements AFE44x0SPO2EVM Demonstration Kit USB to mini USB cable DB9...

Страница 6: ...roper installation of the PC application Click setup exe and follow the prompts to continue with the installation process Select the destination directory and click the Next button Figure 3 PC Applica...

Страница 7: ...ure 4 PC Application Installation Screen 2 Accept the license agreement and click the Next button Figure 5 PC Application Installation Screen 3 7 SLAU480A January 2013 Revised February 2013 AFE4400 an...

Страница 8: ...tallation is complete click the Next button to continue with the installation of Python v2 7 Figure 7 PC Application Installation Screen 5 Once the Python v2 7 is installed click OK The PC application...

Страница 9: ...user to install the USB driver for the new hardware The Windows 7 OS attempts to find the driver for the new hardware found automatically and if the driver is not found there is no pop up message to i...

Страница 10: ...ion www ti com Figure 10 USB Driver Installation Screen 2 10 AFE4400 and AFE4490 Development Guide SLAU480A January 2013 Revised February 2013 Submit Documentation Feedback Copyright 2013 Texas Instru...

Страница 11: ...USB Driver Click the Next button to continue The Driver file is copied to the system directory after clicking the Next button Figure 11 USB Driver Installation Screen 3 5 Click the Finish button once...

Страница 12: ...e various features and functions of the AFE44x0SPO2EVM software GUI The GUI allows the user to easily configure the various functions of the AFE such as the receiver gain and bandwidth settings and tr...

Страница 13: ...ice shown in Figure 16 and for AFE4400 device shown in Figure 17 has the following features 1 View the Device ID and Firmware Revision 2 Device Reset button that resets the device Please note that aft...

Страница 14: ...nd LED1 pulse ii LED2 LED1 LED pulse iii Sample LED2 LED1 Ambient pulse iv LED2 LED1 Convert pulse v LED2 LED1 Ambient Convert pulse 5 Click on Diagnostic Enable and view the Alarm status flags trigge...

Страница 15: ...oftware Figure 17 AFE4400 Device Configuration Global Settings 15 SLAU480A January 2013 Revised February 2013 AFE4400 and AFE4490 Development Guide Submit Documentation Feedback Copyright 2013 Texas I...

Страница 16: ...ab shown in Figure 20 for AFE4490 and Figure 21 for AFE4400 consists of the settings to 1 Enable separate gain mode available for AFE4490 device only 2 Set feedback resistance and capacitance for the...

Страница 17: ...E4400 Device Configuration Tx Stage Figure 20 AFE4490 Device Configuration Rx Stage 17 SLAU480A January 2013 Revised February 2013 AFE4400 and AFE4490 Development Guide Submit Documentation Feedback C...

Страница 18: ...nd OFF time b Rx sample start and end time for 4 channels LED1 LED1 Ambient LED2 LED2 Ambient c Rx convert start and end time for 4 channels LED1 LED1 Ambient LED2 LED2 Ambient 2 Save the timing setti...

Страница 19: ...evice Configuration Timing Controls Figure 23 AFE4400 Device Configuration Timing Controls 19 SLAU480A January 2013 Revised February 2013 AFE4400 and AFE4490 Development Guide Submit Documentation Fee...

Страница 20: ...g the Read All button Click on Transfer Read to Write to copy the contents of the Read Data to Write Data Then click on Write Register to write to the data to the register of the AFE44x0 By clicking o...

Страница 21: ...Histogram can be viewed and analyzed In Three Plot mode any three plots and in Four Plot mode any four plots Time FFT or Histogram can be viewed and analyzed The following algorithms have been used to...

Страница 22: ...wer of 2 512 Since of samples for FFT calc No of samples and If Filter Type Notch then an error msg Insufficient of samples for FFT calculation will be displayed since of samples for FFT calc which is...

Страница 23: ...nal Enter the total number of seconds to acquire the signal When Measure Parameters is clicked the heart rate signal is displayed on the waveform chart A snapshot HR in beats per minute and SpO2 in pe...

Страница 24: ...es the scope analysis result The result is saved in the file Device_ record number _Analysis xls FFT Analysis Saves the FFT analysis result The result is saved in the file Device_ record number _Analy...

Страница 25: ...imeter sensor cable support Two modes of operation Evaluation and Live SPO2 Heart rate Acquire data at up to 1300 Hz in evaluation mode SPI Data interface The AFE44x0SPO2EVM board can be used as a dem...

Страница 26: ...G Header Power Management Block MSP430F5529 AFE4400 DB9 Connector 6pin eZ430 RF header UART Battery Mgmt Accelerometer Battery Header Boost Converter MSP430 3V LDO AFE TX 3 3V LDO SPI SPI AFE RX 3V LD...

Страница 27: ...noise linear voltage regulator TPS7A4901DGN U13 for generating 3 V for the RX_ANA_SUP and RX_DIG_SUP The boost converter output is also fed to the ultralow noise linear voltage regulator TPS7A4901DGN...

Страница 28: ...al tester was used as shown in Figure 30 Figure 30 Fluke SPOT Light SpO2 Functional Tester Setup 5 5 USB Interface The EVM has a mini USB interface for PC application connectivity requiring a standard...

Страница 29: ...reset command and reloads with new firmware The firmware upgrade process steps are represented in the screen shots below From the PC application click on File Firmware Upgrade as shown in Figure 31 F...

Страница 30: ...Texas Instruments AFE44x0SPO2EVM GUI Firmware Updater On a Windows 7 machine C Program Files x86 Texas Instruments AFE44x0SPO2EVM GUI Firmware Updater Figure 34 PC Application Firmware Upgrade 4 Once...

Страница 31: ...n of the pin outs is provided in Table 6 Figure 36 DB9 Pulse Oximeter Connector Pin Outs Table 6 DB9 based Pulse Oximeter Connector pinouts Pin Number Pin Name Pin Description 2 TX_LED_P Anode of the...

Страница 32: ...ided in Table 7 Figure 37 USB Mini Connector Pin Outs Table 7 USB Mini Connector Pin Outs Pin Number Pin Name Pin Description 1 VBUS USB power 5 V 2 D USB DM 3 D USB DP 4 ID NC 5 GND GND 32 AFE4400 an...

Страница 33: ...or to the finger sensor Leave the default setting of 97 for SpO2 80 bpm for HR and 2 for PA The Fluke SPOT Light Pulse SpO2 Functional Tester setup with the finger sensor pulse oximeter cable is shown...

Страница 34: ...art Guide www ti com Figure 38 Sample Test Data 34 AFE4400 and AFE4490 Development Guide SLAU480A January 2013 Revised February 2013 Submit Documentation Feedback Copyright 2013 Texas Instruments Inco...

Страница 35: ...powers down the AFE and the VCM output voltage of the AFE drops to 0 V VCM is measured at the VCM_AFE serial jumper resistor R28 on the board 9 2 ADC_RDY signal After executing the GUI observe the AD...

Страница 36: ...the pulse oximeter cable Figure 41 shows TXP and TXM waveforms after connecting the pulse oximeter cable Figure 40 TXP and TXM Without Pulse Oximeter Cable Figure 41 TXP and TXM After Connecting the...

Страница 37: ...feature is enabled from the Global Settings under the Device Configuration tab Clicking the Diagnostic Enable button enables the diagnostic function and once the diagnostic function is completed the...

Страница 38: ...5KE19D 1 1 C5 0 47uF 0402_CF Murata GRM155R60J474KE19D 0 0 C51 22uF 0805_CF AVX Corporation TLJN226M006R5400 C51 DNI 2 2 C6 C7 18pF 0402_CF Murata GRM1555C1H180JA01D 4 4 D1 D2 D3 D4 75V SOT 323 Diodes...

Страница 39: ...0402_CF Vishay Dale CRCW04021K00JNED R70 R80 R118 DNI 1 1 R72 261k 0603_CFE Vishay Dale CRCW0603261KFKEA 1 1 R75 200k 0402_CF Vishay Dale CRCW0402200KJNED 1 1 R74 15 4k 0603_CFE Vishay Dale CRCW060315...

Страница 40: ...10 VFDFN Invensense MPU9150 U6 DNI 1 1 U8 LDO Regulator IC MRA08A National Semiconductor LP3878MR ADJ NOPB 1 1 U9 Voltage Regulator IC TSQFP50P250X250X80_HS 10N Texas Instruments TPS61093DSK 2 2 U13 U...

Страница 41: ...CB Layouts Figure 43 through Figure 50 show the EVM PCB layouts landscaped for readability Figure 43 AFE44x0SPO2EVM Top Overlay 41 SLAU480A January 2013 Revised February 2013 AFE4400 and AFE4490 Devel...

Страница 42: ...om Figure 44 AFE44x0SPO2EVM Top Solder Figure 45 AFE44x0SPO2EVM Top Layer 42 AFE4400 and AFE4490 Development Guide SLAU480A January 2013 Revised February 2013 Submit Documentation Feedback Copyright 2...

Страница 43: ...Figure 46 AFE44x0SPO2EVM Bottom Layer Figure 47 AFE44x0SPO2EVM Bottom Solder 43 SLAU480A January 2013 Revised February 2013 AFE4400 and AFE4490 Development Guide Submit Documentation Feedback Copyrigh...

Страница 44: ...igure 48 AFE44x0SPO2EVM Bottom Overlay Figure 49 AFE44x0SPO2EVM Drill Drawing 44 AFE4400 and AFE4490 Development Guide SLAU480A January 2013 Revised February 2013 Submit Documentation Feedback Copyrig...

Страница 45: ...nd Schematics Figure 50 AFE44x0SPO2EVM Board Dimensions in mils 45 SLAU480A January 2013 Revised February 2013 AFE4400 and AFE4490 Development Guide Submit Documentation Feedback Copyright 2013 Texas...

Страница 46: ...TRL_SUP 11 LED_DRV_GND 12 LED_DRV_GND 13 TXM 14 TXP 15 LED_DRV_GND 16 LED_DRV_SUP 17 LED_DRV_SUP 18 RX_DIG_GND 19 AFE_PDNZ 20 DIAG_END 21 LED_ALM 22 PD_ALM 23 SPI_CLK 24 SPI_SOMI 25 SPI_SIMO 26 SPI_ST...

Страница 47: ...R2 0R MEM_SIMO MEM_SCLK USD_CS MEM_SOMI R19 10R R18 10R MSP_AVCC 10K R56 10nF C23 MSP_AVCC ACC_INT ADC_RDY C19 2200pF SCL SDA SCL SDA CLKIN 1 NC 2 2 NC 3 3 NC 4 4 NC 5 5 AUX_DA 6 AUX_CL 7 VLOGIC 8 AD...

Страница 48: ...Jum per R55 0R Jum per R54 3v 5v 3v 3v 5v Blue LED3 VDD_BAT VBT_IN SW_LP REG_FB REG_SS REG_VO AFE_VTX MSP_VSUP AFE_5VTX AFE_VRX IN 4 ADJ 6 GND 3 NC 7 SD 8 DAP 9 OUT 5 BYP 1 NC 2 U8 LP3878MR ADJ NOPB...

Страница 49: ...O1 1 IO2 2 IO3 3 IO4 4 IO5 5 IO6 6 IO7 7 IO8 8 GND 9 U4 10K R10 10K R11 10uF C2 10K R12 0 1uF C3 MSP_DVCC USD_CS MEM_SIMO MEM_SCLK MEM0_HOLD MEM0_W MEM_CS0 MEM_SOMI 0 1uF C1 MSP_DVCC MEM_SIMO MEM_SCLK...

Страница 50: ...miniUSB 2 0 PCB Layouts and Schematics www ti com Figure 55 AFE44x0SPO2EVM Blocks 5 of 5 50 AFE4400 and AFE4490 Development Guide SLAU480A January 2013 Revised February 2013 Submit Documentation Feed...

Страница 51: ...ncy energy and has not been tested for compliance with the limits of computing devices pursuant to part 15 of FCC or ICES 003 rules which are designed to provide reasonable protection against radio fr...

Страница 52: ...na type and its gain should be so chosen that the equivalent isotropically radiated power e i r p is not more than that necessary for successful communication This radio transmitter has been approved...

Страница 53: ...ct only after you obtained the license of Test Radio Station as provided in Radio Law of Japan with respect to this product or 3 Use of this product only after you obtained the Technical Regulations C...

Страница 54: ...property damage personal injury or death If there are questions concerning these ratings please contact a TI field representative prior to connecting interface electronics including input power and in...

Страница 55: ...ncy energy and has not been tested for compliance with the limits of computing devices pursuant to part 15 of FCC or ICES 003 rules which are designed to provide reasonable protection against radio fr...

Страница 56: ...na type and its gain should be so chosen that the equivalent isotropically radiated power e i r p is not more than that necessary for successful communication This radio transmitter has been approved...

Страница 57: ...roduct only after you obtained the license of Test Radio Station as provided in Radio Law of Japan with respect to this product or 3 Use of this product only after you obtained the Technical Regulatio...

Страница 58: ...property damage personal injury or death If there are questions concerning these ratings please contact a TI field representative prior to connecting interface electronics including input power and in...

Страница 59: ...sponsible for compliance with all legal regulatory and safety related requirements concerning its products and any use of TI components in its applications notwithstanding any applications related inf...

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