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DAC16 Datasheet(PDF) 9 Page - Analog Devices |
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DAC16 Datasheet(HTML) 9 Page - Analog Devices |
9 / 12 page DAC16 REV. B –9– Table IV. Bipolar Output Operation vs. Digital Input Code Digital Input Decimal Number in Analog Output Word (Hex) DAC Decoder Voltage (V) 0000 65,535 4.999848 7FFE 32,769 152E-6 7FFF 32,768 0 8000 32,767 –152E-6 FFFF 0 –5.00000 74AC11377 REF GND R1 5k IREF +15V 0.1 F REF02 22 F R2 5k DAC16 CCOMP 47 F IOUT AGND 100nF CERAMIC –15V 10 F 0.1 F +5V DIGITAL +5V PIN 3, DAC16 OP97A 10 F 0.1 F +15V 10 F 0.1 F –15V VOUT 0V TO +10V FS 10 F 0.1 F –15V R3 2.5k (5k 2) 88 CLK EN 74AC11377 DB0 – DB7 DB8 – DB15 DIGITAL INPUT WORD RESISTORS: CADDOCK T912–5K–010–02 (OR EQUIVALENT) 5k , 0.01%, TC TRACK = 2 ppm/ C Figure 24. Unipolar Circuit Configuration VOUT 5V FS 74AC11377 REF GND R1 5k IREF +15 V 0.1 F REF02 22 F R2 5k DAC16 CCOMP 47 F IOUT AGND 100nF CERAMIC –15V 10 F 0.1 F +5V DIGITAL +5V PIN 3, DAC16 OP97A 10 F 0.1 F +15V 10 F 0.1 F –15V 10 F 0.1 F –15V R3 2.5k (5k 2) 88 CLK EN 74AC11377 DB0 – DB7 DB8 – DB15 DIGITAL INPUT WORD RESISTORS: CADDOCK T912–5K–010–02 (OR EQUIVALENT) 5k , 0.01%, TC TRACK = 2 ppm/ C R4 2.5k (5k 2) +5VREF +5VREF Figure 25. Bipolar Circuit Configuration Bipolar Configuration For applications that require a bipolar output voltage, the circuit in Figure 24 can be modified slightly by adding a resistor from the reference to the inverting sum node of the output amplifier to level shift the output signal. The transfer equation for the cir- cuit now becomes: V O = R 4 × 8 × IREF 65,535 – Digital Code 65,536 – V REF × R4 R3 The circuit has the form shown in Figure 25, and Table IV pro- vides the relationship between the digital input code and the circuit’s output voltage for the component values shown. |
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