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ADS7945SRTET Datasheet(PDF) 9 Page - Texas Instruments |
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ADS7945SRTET Datasheet(HTML) 9 Page - Texas Instruments |
9 / 49 page GND AVDD REF REFGND PDEN CHSEL NC NC 1 2 3 4 12 11 10 9 ADS7946 ADS7945 ADS7946 www.ti.com SBAS539B – JUNE 2011 – REVISED SEPTEMBER 2011 PIN CONFIGURATION ADS7946 (SINGLE-ENDED) RTE PACKAGE QFN-16 (TOP VIEW) Table 3. PIN FUNCTIONS PIN NO. PIN NAME FUNCTION DESCRIPTION 1 GND Analog/digital Power supply ground; all analog and digital signals are referred with respect to this pin 2 AVDD Analog ADC power supply 3 REF Analog ADC positive reference input; decouple this pin with REFGND 4 REFGND Analog Reference return; short to analog ground plane 5 AIN0 Analog input Positive analog input, channel 0 6 AIN0GND Analog input Ground sense analog input, channel 0 7 AIN1GND Analog input Ground sense analog input, channel 1 8 AIN1 Analog input Positive analog input, channel 1 9 NC — Not connected internally, it is recommended to externally short this pin to GND 10 NC — Not connected internally, it is recommended to externally short this pin to GND This pin selects the analog input channel. Low = Channel 0 11 CH SEL Digital input High = Channel 1 It is recommended to change the channel within a window of one clock; from half a clock after the CS falling edge. This change ensures the settling on the multiplexer output before the sample start. 12 PDEN Digital input This pin enables a power-down feature if it is high at the CS rising edge 13 CS Digital input Chip select signal; active low 14 SCLK Digital input Serial SPI clock 15 SDO Digital output Serial data out 16 DVDD Digital Digital I/O supply Copyright © 2011, Texas Instruments Incorporated Submit Documentation Feedback 9 Product Folder Link(s): ADS7945 ADS7946 |
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