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REF2925 Datasheet(PDF) 6 Page - Texas Instruments |
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REF2925 Datasheet(HTML) 6 Page - Texas Instruments |
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6 / 62 page  1 2 3 4 5 10 9 8 7 6 REF AVDD AINP AINN GND CONVST DOUT SCLK DIN DVDD Thermal PAD 1 2 3 4 5 10 9 8 7 6 REF AVDD AINP AINN GND CONVST DOUT SCLK DIN DVDD 6 ADS8881 SBAS547D – MAY 2013 – REVISED AUGUST 2015 www.ti.com Product Folder Links: ADS8881 Submit Documentation Feedback Copyright © 2013–2015, Texas Instruments Incorporated 7 Pin Configurations and Functions DGS Package VSSOP-10 Top View, Not to Scale DRC Package VSON-10 Top View, Not to Scale Pin Functions PIN I/O DESCRIPTION NAME NO. AINN 4 Analog input Inverting analog signal input AINP 3 Analog input Noninverting analog signal input AVDD 2 Analog Analog power supply. This pin must be decoupled to GND with a 1-μF capacitor. CONVST 6 Digital input Convert input. This pin also functions as the CS input in 3-wire interface mode; see the Description and Timing Requirements sections for more details. DIN 9 Digital input Serial data input. The DIN level at the start of a conversion selects the mode of operation (such as CS or daisy-chain mode). This pin also serves as the CS input in 4-wire interface mode; see the Description and Timing Requirements sections for more details. DOUT 7 Digital output Serial data output DVDD 10 Power supply Digital interface power supply. This pin must be decoupled to GND with a 1-μF capacitor. GND 5 Analog, digital Device ground. Note that this pin is a common ground pin for both the analog power supply (AVDD) and digital I/O supply (DVDD). The reference return line is also internally connected to this pin. REF 1 Analog Positive reference input. This pin must be decoupled with a 10-μF or larger capacitor. SCLK 8 Digital input Clock input for serial interface. Data output (on DOUT) are synchronized with this clock. Thermal pad — Thermal pad Exposed thermal pad (only for the DRC package option). Texas Instruments recommends connecting the thermal pad to the printed circuit board (PCB) ground. |
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