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C1608X7R1C105KT Datasheet(PDF) 4 Page - Texas Instruments |
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C1608X7R1C105KT Datasheet(HTML) 4 Page - Texas Instruments |
4 / 34 page Digital Interface www.ti.com All of the pins on J4 and J8 are connected with minimal filtering or protection. Use appropriate caution when handling these pins. Table 1 summarizes the pinouts for analog interfaces J4 and J8. Table 1. J8/J4: Analog Interface Pinout Pin Number Signal Description, ADS1148/ADS1248 J8.1, J4-1 A0( –) AIN0 J8.2, J4-2 A0(+) AIN1 J8.3, J4-3 A1( –) AIN2 J8.4, J4-4 A1(+) AIN3 J8.5, J4-5 A2( –) AIN4 J8.6, J4-6 A2(+) AIN5 J8.7, J4-7 A3( –) AIN6 J8.8, J4-8 A3(+) AIN7 J8.18 REF – External reference source input ( – side of differential input) J8.20 REF+ External reference source input (+ side of differential input) J8.10-16 (even) Unused J8.15 Unused J8.9-19 (odd), J4-9 AGND Analog ground connections (except J8.15) 3 Digital Interface 3.1 Serial Data Interface The ADS1248EVM is designed to easily interface with multiple control platforms. Samtec part numbers SSW-110-22-F-D-VS-K and TSM-110-01-T-DV-P provide a convenient 10-pin, dual-row, header/socket combination at J7. This header/socket provides access to the digital control and serial data pins of the ADC. Consult Samtec at http://www.samtec.com or call 1-800-SAMTEC-9 for a variety of mating connector options. All logic levels on J7 are 3.3V CMOS, except for the I 2C™ pins. These pins conform to 3.3V I2C rules. Table 2 describes the J7 serial interface pins. Table 2. J7: Serial Interface Pins Pin No. Pin Name Signal Name I/O Type Pullup Function J7.1 CNTL CS In High J7.2 GPIO0 START In High J7.3 CLKX SCLK In None ADS1248 SPI clock J7.4 DGND DGND In/Out None Digital ground J7.5 CLKR Unused – – J7.6 GPIO1 MR In High Master reset J7.7 FSX Unused – – J7.8 GPIO2 Unused – – J7.9 FSR DRDY Out None J7.10 DGND DGND In/Out None Digital ground J7.11 DX DIN In None ADS1248 SPI data in J7.12 GPIO3 PWRSEL In High Selects ±2.5V or +5V supply J7.13 DR DOUT/DRDY Out None ADS1248 data out J7.14 GPIO4 Unused – – J7.15 INT DRDY Out None 4 ADS1148EVM, ADS1248EVM, ADS1148EVM-PDK, and ADS1248EVM-PDK SBAU142B – April 2009 – Revised May 2011 Submit Documentation Feedback Copyright © 2009–2011, Texas Instruments Incorporated |
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