DescriptionThe LT1021DCS8 belongs to LT1021 family which is a precision reference wlth ultra low drift and noise, extremely good long term stability and almost total immunity to input voltage variatlons. The reference output will both source and sink up to 10mA. Three voltages are available; 5V, TV and 10V. The 7V and 10V units can he used as shunt regulators (two terminal zeners) with the same precision characteristics as the three terminal connection. Special care has been taken to minimize themtal regulation effects and temperature induced hysteresis. The LT1021 references are based on a buried zener diode structure which eliminates noise and stability problems associated with surface breakdown devices. Further, a subsurface zener exhibits better temperature drllt and time stability than even the best band-gap references. Unique circuit design makes the LT102t the first IG reference to ofler ultra low drift without the use of high power on-chip heaters. The LT1021-7 uses no resistive dlvlder to set output voltage, and therefore exhibits the best long term stability and temperature hysteresis. The LT1021-5 and LTlO21-10 are intended for systems requirlnga precise 5V or 10V reference, with an initial tolerance as low as 0.05%.
The features of LT1021DCS8 can be summarized as (1)low drift-20ppm/°C max sloper; (2)trimmed output voltage; (3)operates in series or shunt mode; (4)output sinks and sources in series mode; (5)very low noise <1ppm p-p (0.1Hz to 10Hz); (6)>100dB ripple rejection; (7)minimum input-output differential of 1V; (8)100% noise tested.
The absolute maximum ratings of LT1021DCS8 are (1)input voltage: 40V; (2)inpuwutput voltage dliterential: 35V; (3)output to ground voltage (shunt mode current limit) LT1021-5 10V , LT102l-1 10V, LT1021-10 16V; (4)trim pin to ground voltage positive: equal to VOUT, negative: -20V ; (5)output short circuit duration VIN=35V: 10 sec, VIN20V indefinite ; (6)operating temperature range: 0°C to 70°C; (7)storage temperature range all devices: -65°C to 150°C; (8)lead temperature (soldering, 10 sec.): 300°C.
LT1021DCS8 Data Sheet
