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AD5227BUJZ50-R2 Datasheet(PDF) 4 Page - Analog Devices |
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AD5227BUJZ50-R2 Datasheet(HTML) 4 Page - Analog Devices |
4 / 16 page AD5227 Rev. B | Page 4 of 16 Parameter Symbol Conditions Min Typ1 Max Unit INTERFACE TIMING CHARACTERISTICS (applies to all parts6, 10) Clock Frequency fCLK 50 MHz Input Clock Pulse Width tCH, tCL Clock level high or low 10 ns CS to CLK Setup Time tCSS 10 ns CS Rise to CLK Hold Time tCSH 10 ns U/D to Clock Fall Setup Time tUDS 10 ns 1 Typicals represent average readings at 25°C, VDD = 5 V. 2 Resistor position nonlinearity error, R-INL, is the deviation from an ideal value measured between the maximum resistance and the minimum resistance wiper positions. R-DNL measures the relative step change from ideal between successive tap positions. Parts are guaranteed monotonic. 3 NL and DNL are measured at VW with the RDAC configured as a potentiometer divider similar to a voltage output D/A converter. VA = VDD and VB = 0 V. 4 DNL specification limits of ±1 LSB maximum are guaranteed monotonic operating conditions. 5 Resistor Terminals A, B, W have no limitations on polarity with respect to each other. 6 Guaranteed by design and not subject to production test. 7 PDISS is calculated from (IDD × VDD). CMOS logic level inputs result in minimum power dissipation. 8 Bandwidth, noise, and settling time are dependent on the terminal resistance value chosen. The lowest R value results in the fastest settling time and highest bandwidth. The highest R value results in the minimum overall power consumption. 9 All dynamic characteristics use VDD = V. 10 All input control voltages are specified with tR = tF = 1 ns (10% to 90% of VDD) and timed from a voltage level of 1.6 V. Switching characteristics are measured using VDD = 5 V. INTERFACE TIMING DIAGRAMS CS = LOW U/D = HIGH CLK RWB Figure 2. Increment RWB CS = LOW U/D = 0 CLK RWB Figure 3. Decrement RWB 1 0 1 0 1 0 CS CLK U/D RWB tS tUDS tCL tCH tCSS tCSH Figure 4. Detailed Timing Diagram (Only RWB Decrement Shown) |
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