LT1004 Micropower Voltage Reference FeaTuresDescripTion n Guaranteed ±4mV Initial Accuracy LT1004-1.2 The LT®1004 micropower voltage reference is a n Guaranteed ±20mV Accuracy LT1004-2.5 2-terminal bandgap reference diode designed to provide n Guaranteed 10µA Operating Current high accuracy and excellent temperature characteristics n Guaranteed Temperature Performance at very low operating currents. Optimization of the key n Operates up to 20mA parameters in the design, processing and testing of n Very Low Dynamic Impedance the device results in accuracy specifications previously attainable only with selected units. Below is a distribution plot of reference voltage for a typical lot of LT1004-1.2. applicaTions Virtually all of the units fall well within the prescribed n limits of ±4mV. Portable Meter References n Portable Test Instruments The LT1004 is a pin-for-pin replacement for the n Battery-Operated Systems LM185/LM385 series of references with improved accu- n Current Loop Instrumentation racy specifications. More important, the LT1004 is an attractive device for use in systems where accuracy was previously obtained at the expense of power consump- tion and trimming. For a low drift micropower reference with guaranteed tem- perature coefficient, see the LT1034 data sheet. L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Analog Devices, Inc. All other trademarks are the property of their respective owners. Typical applicaTionTypical Distribution ofMicropower Cold Junction Compensation for ThermocouplesReference Voltage (LT1004-1.2) 200 1200 PARTS * 180 TA = 25°C 100k R1 160 3V 140 LITHIUM 1684Ω 5k AT 25°C† 120 LT1004-1.2 + 100 80 186Ω 1.8k NUMBER OF PARTS 60 + 40 – – 20 THERMOCOUPLE * QUIESCENT CURRENT ≅ 15A TYPE R1 † YELLOW SPRINGS INST. CO. J 233k PART #44007 1.2325 1.233 1.2335 1.234 1.2345 1.235 1.2355 1.236 1.2365 1.237 1.2375 K 299k COMPENSATES WITHIN 1004 TA02 T 300k ±1°C FROM 0°C TO 60°C S 2.1M 1004 TA01 1004fc For more information www.linear.com/LT1004 1