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ADS8688 Datasheet(PDF) 3 Page - Texas Instruments |
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ADS8688 Datasheet(HTML) 3 Page - Texas Instruments |
3 / 80 page 1 2 3 4 5 6 7 8 30 29 28 27 26 25 24 CS SCLK SDO ALARM DVDD DGND AGND AGND SDI RST/PD DAISY REFSEL REFIO REFGND REFCAP 22 21 20 AVDD AGND AGND AIN_5P AIN_5GND AIN_4P AIN_4GND 9 AVDD AUX_IN AUX_GND AIN_6P AIN_6GND AIN_7P AIN_7GND 10 11 12 13 14 15 23 AIN_3P AIN_3GND AIN_2P AIN2_GND AIN_0P AIN_0GND AIN_1P AIN_1GND 16 17 18 19 31 32 33 34 35 36 37 38 AGND ADS8688A 1 2 3 4 5 6 7 8 30 29 28 27 26 25 24 CS SCLK SDO ALARM DVDD DGND AGND AGND SDI RST/PD DAISY REFSEL REFIO REFGND REFCAP 22 21 20 AVDD AGND AGND NC NC NC NC 9 AVDD AUX_IN AUX_GND NC NC NC NC 10 11 12 13 14 15 23 AIN_3P AIN_3GND AIN_2P AIN2_GND AIN_0P AIN_0GND AIN_1P AIN_1GND 16 17 18 19 31 32 33 34 35 36 37 38 AGND ADS8684A ADS8684A, ADS8688A www.ti.com SBAS680 – JULY 2015 5 Device Comparison Table PRODUCT RESOLUTION (Bits) CHANNELS SAMPLE RATE (kSPS) ADS8684A 16 4, single-ended 500 ADS8688A 16 8, single-ended 500 6 Pin Configuration and Functions DBT Package 38-Pin TSSOP Top View (Not to Scale) Pin Functions PIN NAME I/O DESCRIPTION NO. ADS8684A ADS8688A 1 SDI Digital input Data input for serial communication. Active low logic input. 2 RST/PD Digital input Dual functionality to reset or power-down the device. 3 DAISY Digital input Chain the data input during serial communication in daisy-chain mode. Active low logic input to enable the internal reference. When low, the internal reference is enabled; 4 REFSEL Digital input REFIO becomes an output that includes the VREF voltage. When high, the internal reference is disabled; REFIO becomes an input to apply the external VREF voltage. 5 REFIO Analog input, output Internal reference output and external reference input pin. Decouple with REFGND on pin 6. Reference GND pin; short to the analog GND plane. 6 REFGND Power supply Decouple with REFIO on pin 5 and REFCAP on pin 7. 7 REFCAP Analog output ADC reference decoupling capacitor pin. Decouple with REFGND on pin 6. 8 AGND Power supply Analog ground pin. Decouple with AVDD on pin 9. 9 AVDD Power supply Analog supply pin. Decouple with AGND on pin 8. 10 AUX_IN Analog input Auxiliary input channel: positive input. Decouple with AUX_GND on pin 11. 11 AUX_GND Analog input Auxiliary input channel: negative input. Decouple with AUX_IN on pin 10. Copyright © 2015, Texas Instruments Incorporated Submit Documentation Feedback 3 Product Folder Links: ADS8684A ADS8688A |
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