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AD7248ATQ3 데이터시트(PDF) 5 Page - Analog Devices |
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AD7248ATQ3 데이터시트(HTML) 5 Page - Analog Devices |
5 / 16 page AD7245A/AD7248A REV. B –5– AD7245A PIN FUNCTION DESCRIPTIONS (DIP PIN NUMBERS) Pin Mnemonic Description lVSS Negative Supply Voltage (0 V for single supply operation). 2ROFS Bipolar Offset Resistor. This provides access to the on-chip application resistors and allows different output voltage ranges. 3 REF OUT Reference Output. The on-chip reference is provided at this pin and is used when configuring the part for bipolar outputs. 4 AGND Analog Ground. 5 DB11 Data Bit 11. Most Significant Bit (MSB). 6–11 DB10–DB5 Data Bit 10 to Data Bit 5. 12 DGND Digital Ground. 13–16 DB4–DB1 Data Bit 4 to Data Bit 1. 17 DB0 Data Bit 0. Least Significant Bit (LSB). 18 CS Chip Select Input (Active LOW). The device is selected when this input is active. Pin Mnemonic Description 19 WR Write Input (Active LOW). This is used in conjunction with CS to write data into the input latch of the AD7245A. 20 LDAC Load DAC Input (Active LOW). This is an asynchronous input which when active transfers data from the input latch to the DAC latch. 21 CLR Clear Input (Active LOW). When this input is active the contents of the DAC latch are reset to all 0s. 22 VDD Positive Supply Voltage. 23 RFB Feedback Resistor. This allows access to the amplifier’s feedback loop. 24 VOUT Output Voltage. Three different output voltage ranges can be chosen: 0 V to 5 V, 0 V to 10 V or –5 V to +5 V. AD7245A PIN CONFIGURATIONS DIP and SOIC 1 2 3 4 5 6 7 8 9 10 11 12 24 23 22 21 20 19 18 17 16 15 14 13 AD7245A TOP VIEW (NOT TO SCALE) VSS ROFS REF OUT AGND (MSB) DB11 DB10 DB9 DB8 DB7 DB6 DB5 DGND DB4 DB3 DB2 DB1 DB0 (LSB) CS WR LDAC CLR VDD RFB VOUT LCCC 4 3 2 1 28 27 26 5 6 7 8 9 10 11 25 24 23 22 21 20 19 12 13 14 15 16 17 18 AGND DB11 DB10 NC DB9 DB8 DB7 CLR LDAC WR NC CS DB0 DB1 NC = NO CONNECT AD7245A TOP VIEW (NOT TO SCALE) PLCC 1 2 3 4 5 6 7 AGND DB11 DB10 NC DB9 DB8 DB7 25 24 23 22 21 20 19 DB1 DB0 CS NC WR LDAC CLR 18 17 16 15 14 13 12 AD7245A TOP VIEW (NOT TO SCALE) NC = NO CONNECT 8 9 10 11 26 27 28 |
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