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ADS1257IRGWT Datasheet(PDF) 4 Page - Texas Instruments |
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ADS1257IRGWT Datasheet(HTML) 4 Page - Texas Instruments |
4 / 16 page 15 14 12 Thermal Pad 1 2 3 4 5 13 11 REFP SCLK DIN DOUT DRDY CS AIN0 AIN1 AIN2 AIN3 6 7 8 9 10 16 17 18 19 20 ADS1257 SBAS656A – SEPTEMBER 2015 – REVISED OCTOBER 2015 www.ti.com 6 Pin Configuration and Functions RGW Package 20-Pin QFN Top View (Not to Scale) Pin Functions PIN I/O DESCRIPTION NO. NAME 1 REFP Analog input Positive reference input 2 AIN0 Analog input Analog input 0. Leave unconnected or connect to AVDD if not used. 3 AIN1 Analog input Analog input 1. Leave unconnected or connect to AVDD if not used. 4 AIN2 Analog input Analog input 2. Leave unconnected or connect to AVDD if not used. 5 AIN3 Analog input Analog input 3. Leave unconnected or connect to AVDD if not used. 6 SYNC/PDWN Digital input(1)(2) Synchronization or power down input; active low. Connect to DVDD if not used. 7 RESET Digital input(1)(2) Reset input, active low. Connect to DVDD if not used. 8 DVDD Digital Digital power supply 9 DGND Digital Digital ground 10 CLKIN Digital input(2) External clock input 11 CS Digital input(1)(2) Chip select; active low. Connect to DGND if not used. 12 DRDY Digital output Data ready output; active low 13 DOUT Digital output Serial data output 14 DIN Digital input(1)(2) Serial data input 15 SCLK Digital input(1)(2) Serial clock input 16 D0/CLKOUT Digital input/output(3) General purpose digital I/O 0 or clock output 17 D1 Digital input/output(3) General purpose digital I/O 1 18 AVDD Analog Analog power supply 19 AGND Analog Analog ground 20 REFN Analog input Negative reference input Thermal Pad — Thermal power pad. Connect to AGND. (1) Schmitt-trigger digital input. (2) 5-V tolerant digital input. (3) Schmitt-trigger digital input when the digital I/O is configured as an input. 4 Submit Documentation Feedback Copyright © 2015, Texas Instruments Incorporated Product Folder Links: ADS1257 |
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