Datasheet LT1031, LH0070 (Analog Devices) - 8

LT1031/LH0070
U U W U APPLICATIO S I FOR ATIO Noise Induced by Air Turbulence (TO-5 Package)
There is nothing magical about foam cups—any (TO-5 PACKAGE) f = 0.01Hz to 10Hz enclosure which blocks air flow from the reference will do. Smaller enclosures are better since they do not allow the µV/DIV) 20µV build-up of internally generated air movement. Naturally, FOAM CUP REMOVED heat generating components external to the reference itself should not be included inside the enclosure. OUTPUT VOLTAGE NOISE (20 0 2 4 6 8 10 12 TIME (MINUTES) LT1031 • TA07
U APPLICATIO CIRCUITS Negative Series Reference Boosted Output Current with No Current Limit
15V V+ ≥ 11.8V R1 R1 4.7k 220Ω LT1031 2N2905 IN OUT D1 R2 15V IN 4.7k GND 10V LT1031 OUT AT 100mA –10V –15V + Q1 AT 50mA GND 2µF 2N2905 SOLID TANT LT1031 • AC01 LT1031 • AC02
Boosted Output Current with Current Limit Handling Higher Load Currents
15V 30mA V+ ≥ 12.8V D1* R1 8.2Ω R1* LED 220Ω IN 169Ω LT1031 OUT VOUT = 10V 2N2905 GND IN TYPICAL LOAD RL CURRENT = 30mA 10V LT1031 OUT AT 100mA + GND 2µF SOLID TANT *SELECT R1 TO DELIVER TYPICAL LOAD CURRENT LT1031 WILL THEN SOURCE OR SINK AS NECESSARY TO MAINTAIN PROPER OUTPUT. DO NOT REMOVE LOAD, AS OUTPUT WILL BE DRIVEN (UNREGULATED) HIGH. LINE REGULATION IS DEGRADED IN THIS APPLICATION LT1031 • AC04 *GLOWS IN CURRENT LIMIT DO NOT OMIT LT1031 • AC03 1031fb 8