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DAC7741 数据表(PDF) 5 Page - Texas Instruments |
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DAC7741 数据表(HTML) 5 Page - Texas Instruments |
5 / 23 page DAC7741 5 SBAS248B www.ti.com Top View LQFP PIN CONFIGURATION PIN NAME DESCRIPTION 1 NC No Connection 2VSS Negative Analog Power Supply. 3VCC Positive Analog Power Supply. 4VREF Buffered Output from REFIN, can be used to drive external devices. Internally, this pin directly drives the DAC circuitry. 5ROFFSET Offsetting Resistor 6 AGND Analog ground (Must be tied to analog ground) 7 AGND Analog ground (Must be tied to analog ground) 8 RFB2 Feedback Resistor 2, used to configure DAC output range. 9 RFB1 Feedback Resistor 1, used to configure DAC output range. 10 SJ Summing Junction of the Output Amplifier 11 VOUT DAC Voltage Output 12 NC No Connection 13 NC No Connection 14 NC No Connection 15 NC No Connection 16 DB0 Data Bit 0 (LSB) 17 DB1 Data Bit 1 18 DB2 Data Bit 2 19 DB3 Data Bit 3 20 DB4 Data Bit 4 21 DB5 Data Bit 5 22 DB6 Data Bit 6 23 NC No Connection 24 NC No Connection 25 NC No Connection 26 TEST Reserved, Connect to DGND 27 DB7 Data Bit 7 PIN DESCRIPTIONS 36 35 34 33 32 31 30 29 28 27 26 25 NC DB15 DB14 DB13 DB12 DB11 DB10 DB9 DB8 DB7 TEST NC 1 2 3 4 5 6 7 8 9 10 11 12 NC V SS V CC V REF R OFFSET AGND AGND RFB2 RFB1 SJ V OUT NC 48 47 46 45 44 43 42 41 40 39 38 13 14 15 16 17 18 19 20 21 22 23 37 24 DAC7741 28 DB8 Data Bit 8 29 DB9 Data Bit 9 30 DB10 Data Bit 10 31 DB11 Data Bit 11 32 DB12 Data Bit 12 33 DB13 Data Bit 13 34 DB14 Data Bit 14 35 DB15 Data Bit 15 (MSB) 36 NC No Connection 37 DGND Digital Ground 38 VDD Digital Power Supply 39 RST VOUT reset; active LOW, depending on the state of RSTSEL, the DAC register is either reset to mid- scale or min-scale. 40 LDAC DAC register load control, rising edge triggered. Data is loaded from the input register to the DAC register. 41 CS Chip Select, active LOW 42 R/W Enabled by CS, controls data read (HIGH) and write (LOW) from or to the input register. 43 RSTSEL Reset Select; determines the action of RST. If HIGH, RST will reset the DAC register to mid- scale. If LOW, RST will reset the DAC register to min-scale. 44 REFEN Enables internal +10V reference (REFOUT), active LOW. 45 REFOUT Internal Reference Output 46 REFADJ Internal Reference Trim. (Acts as a gain adjustment input when the internal reference is used.) 47 REFIN Reference Input 48 NC No Connection PIN NAME DESCRIPTION |
类似零件编号 - DAC7741 |
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类似说明 - DAC7741 |
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