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ADS1147 Datasheet(PDF) 7 Page - Texas Instruments |
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ADS1147 Datasheet(HTML) 7 Page - Texas Instruments |
7 / 67 page ADS1146 ADS1147 ADS1148 www.ti.com SBAS453F – JULY 2009 – REVISED APRIL 2012 ADS1148 (QFN-32) PIN DESCRIPTIONS NAME PIN NO. FUNCTION DESCRIPTION DIN 1 Digital input Serial data input SCLK 2 Digital input Serial clock input NC 3 Not connected Pin can be grounded or left disconnected NC 4 Not connected Pin can be grounded or left disconnected NC 5 Not connected Pin can be grounded or left disconnected NC 6 Not connected Pin can be grounded or left disconnected DVDD 7 Digital Digital power supply DGND 8 Digital Digital ground CLK 9 Digital input External clock input. Tie this pin to DGND to activate the internal oscillator. RESET 10 Digital input Chip reset (active low). Returns all register values to reset values. Analog input; REFP0/GPIO0 11 Positive external reference input 0, or general-purpose digital input/output pin 1 Digital in/out Analog input; REFN0/GPIO1 12 Negative external reference input 0, or general-purpose digital input/output pin 1 Digital in/out REFP1 13 Analog input Positive external reference 1 input REFN1 14 Analog input Negative external reference 1 input VREFOUT 15 Analog output Positive internal reference voltage output Negative internal reference voltage output. Connect this pin to AVSS when using a unipolar VREFCOM 16 Analog output supply, or to the midvoltage of the power supply when using a bipolar supply. AIN0/IEXC 17 Analog input Analog input 0, optional excitation current output AIN1/IEXC 18 Analog input Analog input 1, optional excitation current output Analog input; AIN4/IEXC/GPIO4 19 Analog input 4, optional excitation current output, or general-purpose digital input/output pin 4 Digital in/out Analog input; AIN5/IEXC/GPIO5 20 Analog input 5, optional excitation current output, or general-purpose digital input/output pin 5 Digital in/out Analog input; AIN6/IEXC/GPIO6 21 Analog input 6, optional excitation current output, or general-purpose digital input/output pin 6 Digital in/out Analog input; AIN7/IEXC/GPIO7 22 Analog input 7, optional excitation current output, or general-purpose digital input/output pin 7 Digital in/out Analog input; AIN2/IEXC/GPIO2 23 Analog input 2, optional excitation current output, or general-purpose digital input/output pin 2 Digital in/out Analog input; AIN3/IEXC/GPIO3 24 Analog input 3, optional excitation current output, or general-purpose digital input/output pin 3 Digital in/out IEXC2 25 Analog output Excitation current output 2 IEXC1 26 Analog output Excitation current output 1 AVSS 27 Analog Negative analog power supply AVDD 28 Analog Positive analog power supply START 29 Digital input Conversion start. See text for complete description. Digital input Chip CS 30 Chip select (active low) select (active low) DRDY 31 Digital output Data ready (active low) Serial data output, or data out combined with data ready (active low when DRDY function DOUT/DRDY 32 Digital output enabled) Copyright © 2009–2012, Texas Instruments Incorporated Submit Documentation Feedback 7 Product Folder Link(s): ADS1146 ADS1147 ADS1148 |
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