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DAC7741 数据表(PDF) 12 Page - Texas Instruments |
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DAC7741 数据表(HTML) 12 Page - Texas Instruments |
12 / 23 page DAC7741 12 SBAS248B www.ti.com THEORY OF OPERATION The DAC7741 is a voltage output, 16-bit DAC with a +10V built-in internal reference. The architecture is an R-2R ladder configuration with the three MSBs segmented, followed by an operational amplifier that serves as a buffer. The output buffer is designed to allow user-configurable output adjust- ments, giving the DAC7741 output voltage ranges of 0V to +10V, –5V to +5V, or –10V to +10V. Please refer to Figures 2, 3, and 4 for pin configuration information. The digital input is a parallel word made up of the 16-bit DAC code, which is then loaded into the DAC register using the LDAC input pin. The converter can be powered from ±12V to ±15V dual analog supplies and a +5V logic supply. The device offers a reset function, which immediately sets the DAC output voltage and DAC register to min-scale (code 0000H) or mid-scale (code 8000H). The data I/O and reset functions are discussed in more detail in the following sec- tions. FIGURE 1. DAC7741 Architecture. FIGURE 2. Basic Operation: VOUT = 0 to +10V. 2R 2R 2R 2R 2R 2R 2R 2R 2R R/4 R/2 R/2 R/4 R/4 R R OFFSET RFB2 RFB1 SJ V OUT V REF V REF AGND REF IN REF ADJ REF OUT +10V Internal Reference Buffer 1 µF 0.1 µF V DD 1 µF 0.1 µF V SS 1 µF 0.1 µF V CC Control Bus Data Bus Data Bus DGND V DD RST LDAC CS R/W RSTSEL REFEN REF OUT REFADJ REF IN NC NC NC DB6 DB5 DB4 DB3 DB2 DB1 DB0 NC NC NC DAC7741 (0V to +10V) |
类似零件编号 - DAC7741 |
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类似说明 - DAC7741 |
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