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The HP 6215A Constant voltage/current limiting Single Output DC Power Supply has an all-silicon circuit that uses an input differential amplifier to compare the output voltage with reference voltage derived from a temperature-compensated zener diode. These stable input and reference circuits are combined with a high gain feedback amplifier to achieve low-noise drift-free performance. Output voltage is fully adjustable to zero. Special design precautions prevent output overshoot during turn-on or turn-off, or when ac power is suddenly removed. The front panel meter can be switched to monitor output voltage or current. Constant voltage/constant current or constant voltage/current limiting insures short-circuit proof operation, and permits series and parallel connection of two or more supplies when greater voltage or current is desired. Output: 0-25V, 0-400 mA. Load regulation: 4 mV. Line regulation: 4 mV. Ripple and noise: at any line voltage and load condition within rating. 200 pV rms/l mV p-p (dc to 20 MHz). Temperature coefficient, output change per degree centigrade change in ambient following 30 minutes warm-up: (0.02% +1 mV) per C. Stability, under constant ambient conditions, total drift for 8 hours following 30 minutes warm-up: 0.1% +5 mV. Meter ranges, accuracy is 3% of full scale: 0-30V, 0-500 mA.
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