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ADS1246 Datasheet(PDF) 7 Page - Texas Instruments |
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ADS1246 Datasheet(HTML) 7 Page - Texas Instruments |
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7 / 66 page  ADS1246 ADS1247 ADS1248 www.ti.com SBAS426D – AUGUST 2008 – REVISED MARCH 2010 ADS1248 (TSSOP-28) PIN DESCRIPTIONS NAME PIN NO. FUNCTION DESCRIPTION DVDD 1 Digital Digital power supply DGND 2 Digital Digital ground CLK 3 Digital input External clock input. Tie this pin to DGND to activate the internal oscillator. RESET 4 Digital input Chip reset (active low). Returns all register values to reset values. Analog input REFP0/GPIO0 5 Positive external reference input 0, or general-purpose digital input/output pin 0 Digital in/out Analog input REFN0/GPIO1 6 Negative external reference 0 input, or general-purpose digital input/output pin 1 Digital in/out REFP1 7 Analog input Positive external reference 1 input REFN1 8 Analog input Negative external reference 1 input VREFOUT 9 Analog output Positive internal reference voltage output Negative internal reference voltage output. Connect this pin to AVSS when using a unipolar VREFCOM 10 Analog output supply, or to the midvoltage of the power supply when using a bipolar supply. AIN0/IEXC 11 Analog input Analog input 0, optional excitation current output AIN1/IEXC 12 Analog input Analog input 1, optional excitation current output Analog input AIN4/IEXC/GPIO4 13 Analog input 4, optional excitation current output, or general-purpose digital input/output pin 4 Digital in/out Analog input AIN5/IEXC/GPIO5 14 Analog input 5, optional excitation current output, or general-purpose digital input/output pin 5 Digital in/out Analog input AIN6/IEXC/GPIO6 15 Analog input 6, optional excitation current output, or general-purpose digital input/output pin 6 Digital in/out Analog input AIN7/IEXC/GPIO7 16 Analog input 7, optional excitation current output, or general-purpose digital input/output pin 7 Digital in/out Analog input AIN2/IEXC/GPIO2 17 Analog input 2, optional excitation current output, or general-purpose digital input/output pin 2 Digital in/out Analog input AIN3/IEXC/GPIO3 18 Analog input 3, optional excitation current output, or general-purpose digital input/output pin 3 Digital in/out IOUT2 19 Analog output Excitation current output 2 IOUT1 20 Analog output Excitation current output 1 AVSS 21 Analog Negative analog power supply AVDD 22 Analog Positive analog power supply START 23 Digital input Conversion start. See text for complete description. CS 24 Digital input Chip select (active low) DRDY 25 Digital output Data ready (active low) Serial Data Out Output, or DOUT/DRDY 26 Digital output Data Out combined with Data Ready (active low when DRDY function enabled) DIN 27 Digital input Serial data input SCLK 28 Digital input Serial clock input Copyright © 2008–2010, Texas Instruments Incorporated Submit Documentation Feedback 7 Product Folder Link(s): ADS1246 ADS1247 ADS1248 |
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