ace 432 precision adjustable shunt voltage reference ver 1. 3 1 d escription the ace432 is a low voltage three terminal adjustable shunt regulator with a guaranteed thermal stability over applicable temperature ranges. the output voltage can be set to any value between v ref )approximately 1.24v) to 8v with two exte rn al resistors. the device has a typical output impedance of 0.30 . a ctive output circuitry provides a very sharp turn on characteristic, making this device excellent replacement for zener diodes in many applications. the ace432 is characterized for operation from - 40 to 105 , and two package options (sot - 23 - 3 and to - 9 2) allow the designer the opportunity to select the proper package for their applications. features ? low voltage operation (1.24v) ? adjustable output voltage v d =v ref to 8v ? wide operating current ra nge 60a to 100ma ? low dynamic output impedance 0.30 (typ.) ? trimmed bandgap design up 0.5% ? esd rating is 2.5 kv (per mil - std - 883d) application ? linear regulators ? adjustable supplies ? switching power supplies ? battery operated computers ? instrumentation ? computer disk drives absolute maximum ratings p arameter s ymbol m ax u nit cathode to anode voltage (note 2) v ka 8 v continuous cathode current i ka 150 ma reference input current i ref 3 ma thermal resistance junction to ambient to - 92 sot - 23 - 3 ja 220 230 o c /w operating junction temperature t j 150 o c storage temperature range t stg - 45 to 150 o c lead temperature ( soldering ) 10sec t lead 260 o c note 1 : exceeding these rating could cause damage to the device. all voltages are with respect to g round. currents are positive into, negative out of the specified terminal. note 2: voltage values are with respect to the anode terminal unless otherwise noted.
ace 432 precision adjustable shunt voltage reference ver 1.3 2 packaging type ordering information ace 432 xx xxx + h description to - 92 sot - 23 - 3(a) sot - 23 - 3(b) cathode 1 2 1 anode 2 3 3 ref 3 1 2 nc halogen - free ep : to - 92 bma: sot - 23 - 3(a) bmb: sto - 23 - 3(b) reference voltage accuracy : a : 0.5% b : 1% c: 1.5% d: 2% pb - free
ace 432 precision adjustable shunt voltage reference ver 1.3 3 electrical characteristics parameter symbol test conditions min. typ. max. unit reference voltage 0.5% v ref v ka =v ref , i ka =10ma test circuit #1 1.234 1 .240 1.246 v 1.0% 1.228 1.240 1.252 1.5% 1.2 2 1 1.240 1.259 2.0% 1.215 1.240 1.265 deviation of reference voltage over full temperature range v i(dev) v ka =v ref , i ka =10ma t a = - 40 to 105 test circuit #1 68 mv ratio of change in reference vo ltage to the change in cathode voltage v ref / ka i ka =10ma v ka =8v to v ref test circuit #2 1.0 2.7 mv/v reference current i ref i ka =10ma, r1=10k, r2= test circuit #2 0.15 2 a deviation of reference current over full temperature range i i(dev) i ka =10ma, t a =0 to 105 r1=10k, r2= test circuit #2 0.10 a minimum cathode current for regulation i min v ka =v ref test circuit #1 60 100 a off - state cathode current i off v ka =8v, v ref =0 test circuit #3 0.04 0.8 a dynamic impedance iz ka i i ka =100a - 80ma v ka = v ref , f Q 1khz test circuit #1 0.3 1.0 block diagram symbol diagram
ace 432 precision adjustable shunt voltage reference ver 1.3 4 typical applications ace432 test circuits typical performance characteristics cathode current vs cathode voltage cathode voltage (v) test circuit 1: v ka =v ref test circuit 2: v ka >v ref test circuit 3: off st ate current
ace 432 precision adjustable shunt voltage reference ver 1.3 5 reference voltage vs temperature (iioad=10ma) tempe rat ure ( ) reference input current vs temperature (r1=10k, r2= , iioad=10ma) tempe rature ( )
ace 432 precision adjustable shunt voltage reference ver 1.3 6 stability boundry conditions tempe rature ( ) stability boundary conditio n 150ohm test circuit for v ka =v ref
ace 432 precision adjustable shunt voltage reference ver 1.3 7 150 test circuit for v ka =2v, 3v the areas under the curves represent conditions that may cause the device to oscillate. for v ka =2v and 3v curves, r2 and v bat were adju sted to establish the initial v ka and 1k conditions with c l =0. v bat and c l then were adjusted to determine the ranges of stability. as the graph suggested, ace432 is unconditional stable with ik from 0 to 100ma and with c l from 0.001uf to 1 uf .
ace 432 precision adjustable shunt voltage reference ver 1.3 8 packing information to - 92
ace 432 precision adjustable shunt voltage reference ver 1.3 9 packing information sot - 23 - 3
ace 432 precision adjustable shunt voltage reference ver 1.3 10 notes ace does not assume any responsibility for use as critical compon ents in life support devices or systems without the express written approval of the president and general counsel of ace electronics co., ltd. as sued herein: 1. life support devices or systems are devices or systems which, (a) are intended for surgical impla nt into the body, or (b) support or sustain life, and shoes failure to perform when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a significant injury to the user. 2. a critical compone nt is any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. ace technology co., ltd. http://www.ace - ele. com/
|
