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TLV5616CDRG4 Datasheet(PDF) 11 Page - Texas Instruments |
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TLV5616CDRG4 Datasheet(HTML) 11 Page - Texas Instruments |
11 / 28 page TLV5616C, TLV5616I 2.7V TO 5.5V LOW POWER 12BIT DIGITALTOANALOG CONVERTERS WITH POWER DOWN SLAS152D − DECEMBER 1997 − REVISED APRIL 2004 11 WWW.TI.COM APPLICATION INFORMATION general function The TLV5616 is a 12-bit single supply DAC based on a resistor string architecture. The device consists of a serial interface, speed and power-down control logic, a reference input buffer, a resistor string, and a rail-to-rail output buffer. The output voltage (full scale determined by external reference) is given by: 2REF CODE 2n [V] where REF is the reference voltage and CODE is the digital input value within the range of 010 to 2n−1, where n = 12 (bits). The 16-bit data word, consisting of control bits and the new DAC value, is illustrated in the data format section. A power-on reset initially resets the internal latches to a defined state (all bits zero). serial interface Explanation of data transfer: First, the device has to be enabled with CS set to low. Then, a falling edge of FS starts shifting the data bit-per-bit (starting with the MSB) to the internal register on the falling edges of SCLK. After 16 bits have been transferred or FS rises, the content of the shift register is moved to the DAC latch which updates the voltage output to the new level. The serial interface of the TLV5616 can be used in two basic modes: D Four wire (with chip select) D Three wire (without chip select) Using chip select (four wire mode), it is possible to have more than one device connected to the serial port of the data source (DSP or microcontroller). The interface is compatible with the TMS320 family. Figure 15 shows an example with two TLV5616s connected directly to a TMS320 DSP. TMS320 DSP XF0 XF1 FSX DX CLKX TLV5616 CS FS DIN SCLK TLV5616 CS FS DIN SCLK Figure 15. TMS320 Interface |
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