The LT1029 is a 5-V reference diode that operates with any current between 0.6 mA and 10 mA, and has a maximum TC of 20 ppm/◦C. Using the LT1029 and a JFET-input op amp with TC(VOS) = 6 μV/◦C, design ±2.5-V split references and estimate their worst-case thermal drifts. Assume ±5-V power supplies. Q301; Assuming ±15-V supplies and using an LM385 2.5-V diode with a bias current of 100 μA as a voltage reference, design a current generator whose output is variable over the range −1 mA ≤ IO ≤ 1 mA by means of a 10-k pot.

The LT1029 is a 5-V reference diode that operates with any current between 0.6 mA and 10 mA, and has a maximum TC of 20 ppm/◦C. Using the LT1029 and a JFET-input op amp with TC(VOS) = 6 μV/◦C, design ±2.5-V split references and estimate their worst-case thermal drifts. Assume ±5-V power supplies.

Q301;

Assuming ±15-V supplies and using an LM385 2.5-V diode with a bias current of 100 μA as a voltage reference, design a current generator whose output is variable over the range −1 mA ≤ IO ≤ 1 mA by means of a 10-k pot.


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