LH0071 Datasheet | National Semiconductor

Description The LH0070 and LH0071 are precision three terminal voltage references consisting of a temperature pensated zener diode driven by a current regulator and a buffer amplifier The devices provide an accurate reference that is virtually independent of input voltage load current temperature and time The LH0070 has a 10 000V nominal output to provide equal step sizes in BCD applications The LH0071 has a 10 240V nominal output to provide equal step sizes in binary applications The output voltage is established by trimming ultra-stable low temperature drift thin film resistors under actual operating circuit conditions The devices are shortcircuit proof in both the current sourcing and sinking directions The LH0070 and LH0071 series bine excellent long term stability ease of application and low cost making them ideal choices as reference voltages in precision D to A and A to D systems Features Y Y Y Y Y Y Y Accuracy output voltage LH0070 10V g 0 02% LH0071 10 24V g 0 02% Single supply operation 11 4V to 40V Low output impedance 0 2X Excellent line regulation 0 1 m V V Low zener noise 20 m Vp-p 3-lead TO-5 (pin patible with the LM109) Short circuit proof Low standby current 3 m A Equivalent Schematic Connection Diagram TO-5 Metal Can Package TL H 5550 - 7 TL H 5550 - 1 Order Number LH0070-0H LH0071-0H LH0070-1H LH0071-1H LH0070-2H or LH0071-2H See NS Package Number H03B Typical Applications Statistical Voltage Standard Output Voltage Fine Adjustment TL H 5550 - 9 TL H 5550 - 8 Note The output of the LH0070 and LH0071 may be adjusted to a precise voltage by using the above circuit since the supply current of the devices is relatively small and constant with temperature and input voltage For the circuit shown supply sensitivities are degraded slightly to 0 01% V change in VOUT for changes in VIN and Vb An additional temperature drift of 0 0001% C is added due to the variation of supply current with temperature of the LH0070 and LH0071 Sensitivity to the...