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AD5415 Datasheet(PDF) 5 Page - Analog Devices |
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AD5415 Datasheet(HTML) 5 Page - Analog Devices |
5 / 28 page AD5415 Rev. 0 | Page 5 of 28 TIMING CHARACTERISTICS Temperature range for Y Version: −40°C to +125°C. See Figure 2 and Figure 3. Guaranteed by design and characterization, not subject to production test. All input signals are specified with tr = tf = 1 ns (10% to 90% of VDD) and timed from a voltage level of (VIL + VIH)/2. VDD = 2.5 V to 5.5 V, VREF = 5 V, IOUT2 = 0 V. All specifications TMIN to TMAX, unless otherwise noted. Table 2. Parameter Limit at TMIN, TMAX Unit Conditions/Comments1 fSCLK 50 MHz max Maximum clock frequency t1 20 ns min SCLK cycle time t2 8 ns min SCLK high time t3 8 ns min SCLK low time t4 13 ns min SYNC falling edge to SCLK falling edge setup time t5 5 ns min Data setup time t6 4 ns min Data hold time t7 5 ns min SYNC rising edge to SCLK falling edge t8 30 ns min Minimum SYNC high time t9 0 ns min SCLK falling edge to LDAC falling edge t10 12 ns min LDAC pulse width t11 10 ns min SCLK falling edge to LDAC rising edge t122 25 ns min SCLK active edge to SDO valid, strong SDO driver 60 ns min SCLK active edge to SDO valid, weak SDO driver 1 Falling or rising edge as determined by the control bits of serial word. Strong or weak SDO driver selected via the control register. 2 Daisy-chain and readback modes cannot operate at maximum clock frequency. SDO timing specifications measured with a load circuit, as shown in . Figure 4 t1 t2 t3 t7 t8 t4 t5 t6 t9 t10 t11 DB15 DB0 SCLK DIN LDAC1 LDAC2 SYNC NOTES 1ASYNCHRONOUS LDAC UPDATE MODE 2SYNCHRONOUS LDAC UPDATE MODE ALTERNATIVELY, DATA CAN BE CLOCKED INTO INPUT SHIFT REGISTER ON RISING EDGE OF SCLK AS DETERMINED BY CONTROL BITS. TIMING AS ABOVE, WITH SCLK INVERTED. Figure 2. Standalone Mode Timing Diagram |
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