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ADS7844EG4 Arkusz danych(PDF) 4 Page - Texas Instruments |
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ADS7844EG4 Arkusz danych(HTML) 4 Page - Texas Instruments |
4 / 22 page ADS7844 4 SBAS100A www.ti.com PIN CONFIGURATION Top View PIN DESCRIPTIONS PIN NAME DESCRIPTION 1 CH0 Analog Input Channel 0. 2 CH1 Analog Input Channel 1. 3 CH2 Analog Input Channel 2. 4 CH3 Analog Input Channel 3. 5 CH4 Analog Input Channel 4. 6 CH5 Analog Input Channel 5. 7 CH6 Analog Input Channel 6. 8 CH7 Analog Input Channel 7. 9 COM Ground reference for analog inputs. Sets zero code voltage in single ended mode. Connect this pin to ground or ground reference point. 10 SHDN Shutdown. When LOW, the device enters a very low power shutdown mode. 11 VREF Voltage Reference Input. See Specification Table for ranges. 12 +VCC Power Supply, 2.7V to 5V. 13 GND Ground 14 GND Ground 15 DOUT Serial Data Output. Data is shifted on the falling edge of DCLK. This output is high impedance when CS is high. 16 BUSY Busy Output. Busy goes low when the DIN control bits are being read and also when the device is converting. The Output is high impedance when CS is High. 17 DIN Serial Data Input. If CS is LOW, data is latched on rising edge of DCLK. 18 CS Chip Select Input. Active LOW. Data will not be clocked into DIN unless CS is low. When CS is high DOUT is high impedance. 19 CLK External Clock Input. The clock speed determines the conversion rate by the equation fCLK = 16 • fSAMPLE. 20 +VCC Power Supply 1 2 3 4 5 6 7 8 9 10 CH0 CH1 CH2 CH3 CH4 CH5 CH6 CH7 COM SHDN +V CC D CLK CS D IN BUSY D OUT GND GND +V CC V REF 20 19 18 17 16 15 14 13 12 11 ADS7844 MINIMUM RELATIVE MAXIMUM SPECIFIED ACCURACY GAIN ERROR TEMPERATURE PACKAGE ORDERING TRANSPORT PRODUCT (LSB) (LSB) RANGE PACKAGE-LEAD DESIGNATOR NUMBER MEDIA, QUANTITY ADS7844E ±2 ±4 –40 °C to +85°C QSOP-20 DBQ ADS7844E Rails, 56 " " " " " " ADS7844E/2K5 Tape and Reel, 2500 ADS7844N " " " SSOP-20 DB ADS7844N Rails, 68 " " " " " " ADS7844N/1K Tape and Reel,1000 ADS7844EB ±1 ±3 –40 °C to +85°C QSOP-20 DBQ ADS7844EB Rails, 56 " " " " " " ADS7844EB/2K5 Tape and Reel, 2500 ADS7844NB " " " SSOP-20 DB ADS7844NB Rails, 68 " " " " " " ADS7844NB/1K Tape and Reel, 1000 NOTES: (1) For the most current package and ordering information, see the Package Option Addendum at the end of this data sheet. PACKAGE/ORDERING INFORMATION(1) ABSOLUTE MAXIMUM RATINGS(1) +VCC to GND ........................................................................ –0.3V to +6V Analog Inputs to GND ............................................ –0.3V to +VCC + 0.3V Digital Inputs to GND ........................................................... –0.3V to +6V Power Dissipation .......................................................................... 250mW Maximum Junction Temperature ................................................... +150 °C Operating Temperature Range ........................................ –40 °C to +85°C Storage Temperature Range ......................................... –65 °C to +150°C Lead Temperature (soldering, 10s) ............................................... +300 °C NOTE: (1) Stresses above those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. Exposure to absolute maximum conditions for extended periods may affect device reliability. ELECTROSTATIC DISCHARGE SENSITIVITY This integrated circuit can be damaged by ESD. Texas Instru- ments recommends that all integrated circuits be handled with appropriate precautions. Failure to observe proper handling and installation procedures can cause damage. ESD damage can range from subtle performance degradation to complete device failure. Precision integrated circuits may be more susceptible to damage because very small parametric changes could cause the device not to meet its published specifications. |
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