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ADS131A02IPBS Datasheet(PDF) 4 Page - Texas Instruments |
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ADS131A02IPBS Datasheet(HTML) 4 Page - Texas Instruments |
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4 / 85 page  4 ADS131A02, ADS131A04 SBAS590A – MARCH 2016 – REVISED MARCH 2016 www.ti.com Product Folder Links: ADS131A02 ADS131A04 Submit Documentation Feedback Copyright © 2016, Texas Instruments Incorporated Pin Functions (continued) PIN I/O DESCRIPTION(1) NAME NO. ADS131A02 ADS131A04 (2) Mode signal states are latched following a power-on-reset (POR). Tie these pins high or low with a < 1-k Ω resistor. (3) This pin can have a 10-pF capacitor to GND. CS 23 23 Digital input Chip select; active low DIN 20 20 Digital input Serial data input DONE 18 18 Digital output Communication DONE signal; active low DOUT 21 21 Digital output Serial data output. Connect a 100-k Ω pullup resistor to IOVDD. DRDY 19 19 Digital input/output Data ready; active low; host interrupt and synchronization for multi- devices GND 27 27 Supply Digital ground IOVDD 15 15 Supply Digital I/O supply voltage. Connect a 1-µF capacitor to GND. 29 29 M0(2) 30 30 Digital input Serial peripheral interface (SPI) configuration mode. IOVDD: Asynchronous interrupt mode GND: Synchronous master mode No connection(3): Synchronous slave mode; use for multi-device mode M1(2) 31 31 Digital input SPI word transfer size. IOVDD: 32 bit GND: 24 bit No connection(3): 16 bit M2(2) 32 32 Digital input Hamming code enable. IOVDD: Hamming code word validation on GND: Hamming code word validation off No connection: reserved; do not use NC 5 — — Leave floating or connect directly to AVSS. 6 7 8 NC 24 24 Digital output No connection REFEXT 14 14 Analog input External reference voltage buffered input. Connect a 1-µF capacitor to AVSS when using the internal reference. REFN 13 13 Analog input Negative reference voltage. Connect to AVSS. REFP 12 12 Analog output Positive reference voltage output. Connect a 1-µF capacitor to REFN. RESET 17 17 Digital input System reset; active low RESV 16 16 Digital input Reserved pin; connect to IOVDD SCLK 22 22 Digital input/output Serial data clock VNCP 11 11 Analog output Negative charge pump voltage output. Connect a 270-nF capacitor to AVSS when enabling the negative charge pump. Connect directly to AVSS if unused. XTAL1/CLKIN 25 25 Digital input Master clock input, crystal oscillator buffer input XTAL2 26 26 Digital output Crystal oscillator connection. Leave this pin unconnected if unused. |
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