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AD5941 Datasheet(PDF) 3 Page - Analog Devices |
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AD5941 Datasheet(HTML) 3 Page - Analog Devices |
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3 / 134 page  Data Sheet AD5940/AD5941 Rev. C | Page 3 of 134 Using the Waveform Generator with the Low Power DAC ..95 Waveform Generator Registers .................................................96 SPI Interface.....................................................................................99 Overview ......................................................................................99 SPI Pins.........................................................................................99 SPI Operation ..............................................................................99 Command Byte............................................................................99 Writing to and Reading from Registers ...................................99 Reading Data from the Data FIFO ........................................ 100 Sleep and Wake-Up Timer .......................................................... 101 Sleep and Wake-Up Timer Features ...................................... 101 Sleep and Wake-Up Timer Overview.................................... 101 Configuring a Defined Sequence Order ............................... 101 Recommended Sleep and Wake-Up Timer Operation ....... 101 Sleep and Wake-Up Timer Registers..................................... 102 Interrupts....................................................................................... 106 Interrupt Controller Interupts................................................ 106 Configuring the Interrupts ..................................................... 106 Custom Interrupts.................................................................... 106 External Interrupt Configuration .......................................... 106 Interrupt Registers ................................................................... 107 External Interrupt Configuration Registers ......................... 112 Digital Inputs/Outputs ................................................................ 116 Digital Inputs/Outputs Features............................................. 116 Digital Inputs/Outputs Operation ......................................... 116 GPIO Registers ......................................................................... 117 System Resets.................................................................................120 Analog Die Reset Registers......................................................120 Power Modes .................................................................................121 Active High Power Mode (>80 kHz)......................................121 Active Low Power Mode (<80 kHz) .......................................121 Hibernate Mode ........................................................................121 Shutdown Mode........................................................................121 Low Power Mode ......................................................................121 Power Modes Registers ............................................................121 Clocking Architecture ..................................................................124 Clock Features ...........................................................................124 Clock Architecture Registers...................................................124 Applications Information.............................................................128 EDA Bioimpedance Measurement Using a Low Bandwidth Loop............................................................................................128 Body Impedance Analysis (BIA) Measurement Using a High Bandwidth Loop........................................................................129 High Precision Potentiosat Configuration ............................130 Using the AD5940/AD5941, AD8232, and AD8233 for Bioimpedance and Electrocardiogram (ECG) Measurements .....................................................................................................131 Smart Water/Liquid Quality AFE...........................................132 Outline Dimensions......................................................................133 Ordering Guide .........................................................................134 Automotive Products................................................................134 REVISION HISTORY 5/2022—Rev. B to Rev. C Added AD5941W.......................................................... Throughout Changes to Features Section ............................................................1 Changes to Specifications Section...................................................8 Changes to Table 1 ............................................................................8 Changes to Table 5 ..........................................................................19 Changes to High Speed DAC Output Signal Generation Section ............................................................................................................42 Changes to Figure 28 ......................................................................46 Changes to Table 89 ........................................................................82 Changes to Ordering Guide.........................................................133 Added Automotive Products Section .........................................133 3/2020—Rev. A to Rev. B Changes to Features Section ............................................................1 Changes to Figure 2 and Figure 3 ...................................................5 Changes to Table 6 ..........................................................................18 Changes to Table 7 ..........................................................................20 Deleted Figure 19; Renumbered Sequentially .............................29 Added System Initialization Section and Table 14; Renumbered Sequentially......................................................................................29 Change to Low Power DAC Switch Options Section.................30 Changes to Figure 21 ......................................................................32 Changes to Table 17 ........................................................................33 Changes to Figure 22 ......................................................................36 Changes to Figure 23 ......................................................................38 Changes to Figure 29 ......................................................................48 Changes to Table 36 ........................................................................49 Changes to ADC Transfer Function Section...............................53 Changes to Figure 33 ......................................................................54 Changes to Sinc3 Filter Section and Internal Temperature Sensor Channel Section..................................................................55 Changes to Precision Voltage References Section and Figure 38...........................................................................................83 Change to Table 93..........................................................................84 Changes to Table 101......................................................................91 Changes to Configuring a Defined Sequence Order Section and Figure 51................................................................................................. 100 |
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