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REF02H Datasheet(PDF) 10 Page - Analog Devices |
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REF02H Datasheet(HTML) 10 Page - Analog Devices |
10 / 16 page REF02 Rev. I | Page 10 of 16 OUTPUT ADJUSTMENT The REF02 trim terminal can be used to adjust the output voltage over a 5 V ± 300 mV range. This feature lets the system designer trim system errors by setting the reference to a voltage other than 5 V. The output also can be set to exactly 5.00 V or to 5.12 V for binary applications. Adjustment of the output does not significantly affect the temperature performance of the device. The temperature coefficient change is approximately 0.7 ppm/°C for 100 mV of output adjustment. U1 REF02 VIN VOUT TEMP TRIM GND VIN VO pot 10k Ω R2 1k Ω R1 470k Ω Figure 14. Output Adjustment Circuit VIN GND –18V +18V 4 2 REF02 Figure 15. Burn-In Circuit VIN GND REF02 VO TRIM TEMP 0.1 µF 5k Ω OP02 10k Ω 10k Ω +15V –15V +15V +5V –5V 4 5 3 6 2 Figure 16. ±5 V Reference REF02 R1 5.6k Ω R2 5.6k Ω 2 +5V 4 6 2 OP02 – + 3 4 6 7 –9V VREF VO+ +2.5V +VO –2.5V VO+ = (VREF), R1 R1 + R2 VO– = (VREF) R2 R1 + R2 Figure 17. ±2.5 V Reference |
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