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DAC7613EBG4 Datasheet(PDF) 7 Page - Texas Instruments |
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DAC7613EBG4 Datasheet(HTML) 7 Page - Texas Instruments |
7 / 13 page 7 ® DAC7613 THEORY OF OPERATION The DAC7613 is a 12-bit, voltage output Digital-to-Analog Converter (DAC). The architecture is a classic R-2R ladder configuration followed by an operational amplifier that serves as a buffer. The minimum voltage output (“zero-scale”) and maximum voltage output (“full-scale”) are set by the exter- nal voltage references (VREFL and VREFH, respectively). The digital input is a 12-bit parallel word and the DAC input register offers a readback capability. The converter can be powered from a single +5V supply or a dual ±5V supply. The device offers a reset function which immediately sets the DAC output voltage and DAC register to mid-scale (code 800H) or to zero-scale (code 000H), depending on the status of the reset selection. See Figures 1 and 2 for the basic operation of the DAC7613. FIGURE 1. Basic Single-Supply Operation of the DAC7613. FIGURE 2. Basic Dual-Supply Operation of the DAC7613. 1 2 3 4 5 6 7 8 9 10 11 12 24 23 22 21 20 19 18 17 16 15 14 13 DB11 DB10 DB9 DB8 DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0 R/W CS RESETSEL RESET LOADDAC V OUT V DD GND V SS V REFH NIC V REFL Read/Write Chip Select Reset Select Reset DAC Load DAC Register 0V to +2.5V DAC7613E +5V Data Bus +2.5V 0.1 µF1µF 0.1 µF + 1 2 3 4 5 6 7 8 9 10 11 12 24 23 22 21 20 19 18 17 16 15 14 13 DB11 DB10 DB9 DB8 DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0 R/W CS RESETSEL RESET LOADDAC V OUT V DD GND V SS V REFH NIC V REFL Read/Write Chip Select Reset Select Reset DAC Load DAC Register –2.5V to +2.5V DAC7613E +5V Data Bus –5V 0.1 µF1µF 1 µF 0.1 µF +2.5V 0.1 µF –2.5V 0.1 µF + + |
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