features ? high performance alternative to ref1004, lt1004 and lm185/385 references ? 4 a typical knee current ? small outline sot23 package ? e-line alternative available ? 20ppm/c typical temperature coefficient ? unconditionally stable ? 0.5%, 1%, 2% and 3% tolerance ? contact zetex marketing for availability of tighter tolerance devices applications ? battery powered equipment ? precision power supplies ? portable instrumentation ? portable communications devices ? notebook and palmtop computers ? data acquisition systems ? a/d and d/a converters ? test equipment description the zxre1004 is a 1.22 volt bandgap reference circuit designed for ultra low current operation, typically 4 a. the device is available in a sot23 surface mount package offering the ultimate in space and power saving. these features make the zxre1004 particularly suitable for portable and battery powered applications. sot23 tolerance selection is available to 0.5% for precision applications. excellent performance is maintained over the 8 a to 20ma operating current range with a typical temperature coefficient of only 20ppm/ c. the device has been designed to be highly tolerant of capacitive loads so maintaining excellent stability. as well as the sot23, the zxre1004 can offer a pin for pin compatible alternative to the ref1004, lt1004 and lm185/385 series of voltage references with an e-line (to92 style) equivalent. v r g nd sot23 micropower (4 a) 1.22v voltage reference 1 1.5v 27k 1.22v schematic diagram applications circuit ultra low quiescent reference from a 1.5v battery source. zxre1004 issue 3 - january 2003
absolute maximum ratings reverse current 30ma forward current 10ma operating temperature. -40 to 85 c storage temperature. -55 to 125 c power dissipation (t amb =25 c) sot23 330mw e-line 500mw 2 electrical characteristics test conditions (unless otherwise stated) t amb =25c symbol parameter conditions limits tol. % units min typ max v r reverse breakdown voltage i r =100 a 1.214 1.208 1.196 1.183 1.22 1.22 1.22 1.22 1.226 1.232 1.244 1.257 0.5 ? 1 2 3 v i min minimum knee current 4 8 a i r recommended operating current range 0.008 20 ma t c ? average reverse breakdown voltage temperature coefficient i r(min) to i r(max) 20 75 ppm/ c ? v r ? i r reverse breakdown voltage change with current i r =8 a to 1ma i r =1ma to 20ma 1 10 mv mv z r reverse dynamic impedance i r =1ma f =100hz i ac =0.1 i r 0.2 0.6 ? e n wideband noise voltage i r =8 a to 100 a f=10hz to 10khz 60 v(rms) 0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 reverse voltage (v) reverse characteristics 0 2 4 6 8 10 reverse current ( a) -40 c 25 c 85 c ? t c = ( v r ( max ) ? v r ( min ) ) x 1000000 v r x ( t ( max ) ? t ( min ) ) note: v r(max) - v r(min) is the maximum deviation in reference voltage measured over the full operating temperature range. ? note: 0.5% sot23 only zxre1004 issue 3 - january 2003
3 typical characteristics -40-20 0 20406080 temperature ( c) temperature drift 1.19 1.20 1.21 1.22 1.23 1.24 1.25 reference voltage (v) 0.01 0.1 1 10 100 frequency (khz) slope resistance v frequency 0.1 1 10 100 slope resistance ( ? ) 20ma 1ma 100 a 0 40 80 120 140 time ( s) transient response 0 0.5 1.5 1.0 10 0 i in ( a) v r (v) 10 a 20ma 0 102030 405060708090100 reference current ( a) noise voltage 0 10 20 30 40 50 60 70 80 wideband noise ( v) 100 10 1 0.1 0.01 0.001 reference current (ma) slope resistance v current 0 2 4 6 8 10 12 14 slope resistance ( ? ) 25 c -40 c 0.1 1 10 100 1000 forward current (ma) forward characteristics 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 forward voltage (v) 85 c zxre1004 issue 3 - january 2003
4 zetex plc. fields new road, chadderton, oldham, ol9-8np, united kingdom. telephone: (44)161 622 4422 (sales), (44)161 622 4444 (general enquiries) fax: (44)161 622 4420 zetex gmbh zetex inc. zetex (asia) ltd. these are supported by streitfeldstra?e 19 700 veteran?s memorial hwy 3701-04 metroplaza, tower 1 agents and distributors in d-81673 mnchen hauppauge, ny 11788 hing fong road, major countries world-wide germany usa kwai fong, hong kong ? zetex plc 2003 telefon: (49) 89 45 49 49 0 telephone: (631) 360-2222 telephone:(852) 26100 611 fax: (49) 89 45 49 49 49 fax: (631) 360-8222 fax: (852) 24250 494 www.zetex.com this publication is issued to provide outline information only which (unless agreed by the company in writing) may not be used, applied or reproduced f or any purpose or form part of any order or contract or be regarded as a representation relating to the products or services concerned. the company reserves th e right to alter without notice the specification, design, price or conditions of supply of any product or service. ordering information device tol% package partmarking zxre1004cf 0.5 sot23 10d zxre1004df 1 sot23 10c zxre1004ef 2 sot23 10b zxre1004ff 3 sot23 10a zxre1004dr ? 1 e-line zxre1004d zxre1004er ? 2 e-line zxre1004e zxre1004fr ? 3 e-line zxre1004f ? contact zetex marketing for availability of these package options note: for tape and reel options add suffix ta to the part number eg zxre1004dfta sot23 package suffix ? f top view ? pin 1 floating or connected to pin 2 e-line, 3 pin,rev package suffix ? r bottom view ? pin 3 floating or connected to pin 1 connection diagrams zxre1004 issue 3 - january 2003
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