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WM5615IP Datasheet(PDF) 7 Page - Wolfson Microelectronics plc |
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WM5615IP Datasheet(HTML) 7 Page - Wolfson Microelectronics plc |
7 / 12 page Wolfson Microelectronics 7 WM5615 Pin Description PIN NAME FUNCTION 1 DIN Serial data input. 2 SCLK Serial clock input. 3 CS Chip select, active low. 4 DOUT Serial data output for daisy- chaining. 5 AGND Analogue ground. 6 REFIN Reference input. 7 VOUT DAC output. 8 VDD Positive power supply. Timing Diagram Detailed Description General Function The WM5615 uses a resistor string network buffered with a single-supply CMOS op amp in a fixed gain of x2 to convert 10-bit digital data to analogue voltage levels (see Block Diagram). The topology of the WM5615 makes the output the same polarity as the reference input (see Ta- ble 1). An internal reset circuit forces the DAC register to reset to all 0s on power-up. VOUT R + VDD AGND 0.1µF DOUT DIN SCLK - R +5V CS REFIN Figure 1 - Typical Operating Circuit th(CSHO) tsu(CSS) th(CSH1) th(DH) tsu(DS) DIN DOUT SCLK CS tw(CH) tw(CL) tw(CS) tsu(CS1) tpd(DOUT) Previous LSB NOTES: A. The input clock, applied at the SCLK terminal, should be inhibited low when CS is high to minimise clock feedthrough. B. Data input from preceeding conversion cycle. C. Sixteenth SCLK falling edge. See note A See note C See note B + - |
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