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ADS5545 Datasheet(PDF) 14 Page - Texas Instruments |
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ADS5545 Datasheet(HTML) 14 Page - Texas Instruments |
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14 / 54 page 
www.ti.com REGISTER INITIALIZATION Register Address RegisterData t (SCLK) t (DSU) t (DH) t (SLOADS) D7 A7 D3 A3 D5 A5 D1 A1 D6 A6 D2 A2 D4 A4 D0 A0 SDATA SCLK SEN RESET t (SLOADH) SERIAL INTERFACE TIMING CHARACTERISTICS ADS5517 SLWS203 – DECEMBER 2007 After power-up, the internal registers must be reset to their default values. This is done in one of two ways: 1. Either through hardware reset by applying a high-going pulse on RESET pin (of width greater than 10 ns) as shown in Figure 5. OR 2. By applying software reset. Using the serial interface, set the <RST> bit (D1 in register 0x6C) to high. This initializes the internal registers to their default values and then self-resets the <RST> bit to low. In this case the RESET pin is kept low. Figure 5. Serial Interface Timing Diagram Typical values at 25 °C, min and max values across the full temperature range T MIN = –40°C to TMAX = 85°C, AVDD = DRVDD = 3.3 V (unless otherwise noted) MIN TYP MAX UNIT fSCLK SCLK frequency > DC 20 MHz tSLOADS SEN to SCLK setup time 25 ns tSLOADH SCLK to SEN hold time 25 ns tDSU SDATA setup time 25 ns tDH SDATA hold time 25 ns 14 Submit Documentation Feedback Copyright © 2007, Texas Instruments Incorporated Product Folder Link(s): ADS5517 |
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