5V micropower precision references ADVANCE PRODUCT INFORMATION REF50 REF50Z FEATURES Low knee current - typically 40pA Ideal for battery operation - 300nW internally shaped REF25Z - 3 lead TO-92 plastic package REF25 - 2 lead TO-18 metal can package Tight initial V,,,, tolerance +1% REF50 +2% REF50Z Low temperature coefficient @ Low slope resistance @ Low cost DESCRIPTION The REF50 and REF50Z are monolithic integrated circuits using the bandgap principle to provide a precise stable reference voltage of 5V without the need for an external shaping capacitor. There are two package options available, a 2 pin TO-18 metal can and a cost effective 3 pin plastic TO-92 package. Plastic (TO-92) Metal can (TO-18) packages These references feature a recommended operating current range of 60zA to 5mA which make them ideal for all low power and battery applications. 7 nn im VREF | | | Ry Rs Rs : | AV | | Re | | | | Ra | | | R R | 7" | | | GNo Po a Internal connections 3-43REF50 REF50Z ABSOLUTE MAXIMUM RATINGS Reference current .. .. 1... +. ee ee ee) MA Operating temperature range .. .. .. .. . . . Oto +70C Storage temperature range ceo. . o.. ee 665 to +125C Soldering temperature for a maximum time of 10s within 1.59mm of the seating plane eee ee ee ee 6300PC within 0.80mm of the seating plane eee ee ee ee 6 2659 ELECTRICAL CHARACTERISTICS (at T,..)= 25C unless otherwise stated). Parameter Symbol | Min. | Typ. | Max. Units Comments Output voltage Vrer 4.95 | 5.00 | 5.05 V REF50O lace = 150nA REF = 4.90 ; 5.00 | 5.10 REF502Z Slope resistance Rrer _ 1.2 1.5 REF50 ) Iper = 150pnA : Q to 5mA - 1.2 2.0 REF50Z j note (a) Turn-on (knee) current lon - 40 - pA Recommended operating | Iper 0.06 - 5.0 mA current range Temperature coefficient | TC Vier - 25 55 C REF50 ) lace = 150nA ppm note (b) ~ 35 70 REF50Z RMS noise voltage En - 35 - uv Peak to peak 1Hz to 10kHz Turn-on time Ton - 80 - BS lef = 150nA Turn-off time Tots - 7 - reo Turn-on time Ton - 65 - HS let = 5OOKA Turn-off time Tott - 2 - 3-44REF50 REF50Z NOTES (a) Stope resistance (Rper) Slope resistance is defined as Rreg = Change in Ve, over a specified current range The change in reference current (b) Reference voltage temperature coefficient (TC V+) This is the normalised reference voltage change over temperature, divided by the change in temperature. It is expressed in ppm/C as follows: TC Vyep = AV rot * 108 ppm/C VierX AT AT =temperature change in C. AV, 4 = change in reference voltage over temperature change AT. (c) Line regulation (AV, L) The ratio of the change in reference voltage to the change in input voltage. Roe X 100 AVrep L= (tf | HIV ret WR, Rs = Source resistance. Connection diagram Rext Rext Voc o-(__}+ Vee . SUBSTRATE 4 (OPEN CIRCUIT OR OV) VRer YRer GND (Ov) , GND (OV) L Rext= (Voc Vaer)/tner REF50Z (Plastic TO-92) REF50 (Metal can TO-18) Bottom view Bottom view 3-45REF50 REF50Z PACKAGE OUTLINE Physical Dimensions 4,82 $038 482 05 12,7 Min L. $0457 40.75 OP (Vee) GND TO-92 (REF25Z) rer SUBSTRATE} |GNO(OV) (TO OV OR OPEN CIRC XK TO-18 (2 Lead) T2) ( (REF25) 1 6405 GND (OW) VREF 3-46