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DAC7568 Fiches technique(PDF) 7 Page - Texas Instruments |
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DAC7568 Fiches technique(HTML) 7 Page - Texas Instruments |
7 / 65 page SCLK SYNC DIN DB31 DB0 LDAC (1) LDAC (2) CLR t 2 t 7 t 6 t 9 t 10 t 8 t 4 t 5 t 3 t 1 t 12 t 14 t 15 t 13 t 11 DAC7568 DAC8168 DAC8568 www.ti.com SBAS430D – JANUARY 2009 – REVISED MAY 2012 TIMING DIAGRAM (1) Asynchronous LDAC update mode. For more information and details, see the LDAC Functionality section. (2) Synchronous LDAC update mode. For more information and details, see the LDAC Functionality section. Figure 1. Serial Write Operation TIMING REQUIREMENTS (1) (2) At AVDD = 2.7V to 5.5V and over –40°C to +125°C (unless otherwise noted). DAC7568/DAC8168/DAC8568 PARAMETER TEST CONDITIONS MIN TYP MAX UNIT SCLK falling edge to SYNC falling edge (for t1 AVDD = 2.7V to 5.5V 10 ns successful write operation) t2 SCLK cycle time AVDD = 2.7V to 5.5V 20 ns (3) SYNC rising edge to 31st SCLK falling edge AVDD = 2.7V to 5.5V 13 t3 ns (for successful SYNC interrupt) t4 Minimum SYNC HIGH time AVDD = 2.7V to 5.5V 80 ns t5 SYNC to SCLK falling edge setup time AVDD = 2.7V to 5.5V 13 ns t6 SCLK LOW time AVDD = 2.7V to 5.5V 8 ns t7 SCLK HIGH time AVDD = 2.7V to 5.5V 8 ns t8 SCLK falling edge to SYNC rising edge AVDD = 2.7V to 5.5V 10 ns t9 Data setup time AVDD = 2.7V to 5.5V 6 ns t10 Data hold time AVDD = 2.7V to 5.5V 4 ns SCLK falling edge to LDAC falling edge for t11 AVDD = 2.7V to 5.5V 40 ns asynchronous LDAC update mode t12 LDAC pulse width LOW time AVDD = 2.7V to 5.5V 80 ns LDAC falling edge to SCLK falling edge for t13 AVDD = 2.7V to 5.5V 4 × t1 ns synchronous LDAC update mode t14 32nd SCLK falling edge to LDAC rising edge AVDD = 2.7V to 5.5V 40 ns t15 CLR pulse width LOW time AVDD = 2.7V to 5.5V 80 ns (1) All input signals are specified with tR = tF = 3ns (10% to 90% of AVDD) and timed from a voltage level of (VIL + VIH)/2. (2) See the Serial Write Operation timing diagram. (3) Maximum SCLK frequency is 50MHz at AVDD = 2.7V to 5.5V. Copyright © 2009–2012, Texas Instruments Incorporated Submit Documentation Feedback 7 Product Folder Link(s): DAC7568 DAC8168 DAC8568 |
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