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ADS7800 Datasheet(PDF) 4 Page - Texas Instruments |
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ADS7800 Datasheet(HTML) 4 Page - Texas Instruments |
4 / 21 page ADS7800 4 SBAS001A www.ti.com PIN ASSIGNMENTS PIN # NAME DESCRIPTION 1IN1 ±10V Analog Input. Connected to GND for ±5V range. 2IN2 ±5V Analog Input. Connected to GND for ±10V range. 3 REF +2V Reference Output. Bypass to GND with 22 µF to 47 µF Tantalum. Buffer for external loads. 4 AGND Analog Ground. Connect to pin 13. 5 D11 Data Bit 11. Most Significant Bit (MSB). 6 D10 Data Bit 10. 7 D9 Data Bit 9. 8 D8 Data Bit 8. 9 D7 Data Bit 7 if HBE is LOW; LOW if HBE is HIGH. 10 D6 Data Bit 6 if HBE is LOW; LOW if HBE is HIGH. 11 D5 Data Bit 5 if HBE is LOW; LOW if HBE is HIGH. 12 D4 Data Bit 4 if HBE is LOW; LOW if HBE is HIGH. 13 DGND Digital Ground. Connect to pin 4. 14 D3 Data Bit 3 if HBE is LOW; Data Bit 11 if HBE is HIGH. 15 D2 Data Bit 2 if HBE is LOW; Data Bit 10 if HBE is HIGH. 16 D1 Data Bit 1 if HBE is LOW; Data Bit 9 if HBE is HIGH. 17 D0 Data Bit 0 if HBE is LOW. Least Significant Bit (LSB); Data Bit 8 if HBE is HIGH. 18 HBE High Byte Enable. When held LOW, data output as 12 bits in parallel. When held HIGH, four MSBs presented on pins 14-17, pins 9-12 output LOWs. Must be LOW to initiate conversion. 19 R/C Read/Convert. Falling edge initiates conversion when CS is LOW, HBE is LOW, and BUSY is HIGH. 20 CS Chip Select. Outputs in Hi-Z state when HIGH. Must be LOW to initiate conversion or read data. 21 BUSY Busy. Output LOW during conversion. Data valid on rising edge in Convert Mode. 22 –VS Negative Power Supply. –12V or –15V. Bypass to GND. 23 VSD Positive Digital Power Supply. +5V. Connect to pin 24, and bypass to GND. 24 VSA Positive Analog Power Supply. +5V. Connect to pin 23, and bypass to GND. PIN CONFIGURATION Top View DIP/SOIC 1 2 3 4 5 6 7 8 9 10 11 12 IN1 IN2 REF AGND D11 D10 D9 D8 D7 D6 D5 D4 24 23 22 21 20 19 18 17 16 15 14 13 V V –V BUSY CS R/C HBE D0 D1 D2 D3 DGND SA SD S |
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Similar Description - ADS7800_14 |
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