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MAX5253AEAP Datasheet(PDF) 11 Page - Maxim Integrated Products |
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MAX5253AEAP Datasheet(HTML) 11 Page - Maxim Integrated Products |
11 / 16 page Power-Down Lockout ( PDL) The power-down lockout pin PDL disables software shutdown when low. When in shutdown, transitioning PDL from high to low wakes up the part with the output set to the state prior to shutdown. PDL could also be used to asynchronously wake up the device. Daisy-Chaining Devices Any number of MAX5253s can be daisy chained by connecting the DOUT pin of one device to the DIN pin of the following device in the chain (Figure 7). Since the MAX5253’s DOUT pin has an internal active pull-up, the DOUT sink/source capability determines the time required to discharge/charge a capacitive load. Refer to the serial-data-out VOH and VOL specifi- cations in the Electrical Characteristics. Figure 8 shows an alternate method of connecting sev- eral MAX5253s. In this configuration, the data bus is common to all devices; data is not shifted through a daisy chain. More I/O lines are required in this configu- ration because a dedicated chip-select input ( CS) is required for each IC. +3V, Quad, 12-Bit Voltage-Output DAC with Serial Interface ______________________________________________________________________________________ 11 CS SCLK DIN DOUT (MODE 1) MSB FROM PREVIOUS WRITE MSB FROM PREVIOUS WRITE COMMAND EXECUTED 9 8 16 1 A0 A1 D0 C1 C0 D11 D10 D9 D6 D5 D4 D3 D2 D1 D8 D7 DOUT (MODE 0) A0 A1 D0 A1 C1 C0 D11 D10 D9 D6 D5 D4 D3 D2 D1 D8 D7 A0 A1 D0 A1 C1 C0 D11 D10 D9 D6 D5 D4 D3 D2 D1 D8 D7 DATA PACKET (N) DATA PACKET (N-1) DATA PACKET (N) DATA PACKET (N-1) DATA PACKET (N) Figure 5. Serial-Interface Timing Diagram SCLK DIN DOUT tCSO tCSS tCL tCH tCP tDO1 tCSW tCS1 tDO2 tCSH tDS tDH CS Figure 6. Detailed Serial-Interface Timing Diagram |
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