device description the zra400 uses a bandgap circuit design to achieve a precision micropower voltage reference of 4.096 volts. the device is available in small outline surface mount packages, ideal for applications where space saving is important. the zra400 design provides a stable voltage without an external capacitor and is stable with capacitive loads. the zra400 is recommended for operation between 50 m a and 5ma and so is ideally suited to low power and battery powered applications. excellent performance is maintained to a suggested absolute maximum of 25ma, however the rugged design and 20 volt processing allows the reference to withstand transient effects and currents up to 200ma. superior switching capability allows the device to reach stable operating conditions in only a few microseconds. features small outline so8, sot23 and to92 style packages. no stabilising capacitor required typical t c 15ppm/c typical slope resistance 0.55 w 3%, 2% and 1% tolerance industrial temperature range operating current 50 m a to 5ma applications battery powered and portable equipment. metering and measurement systems. instrumentation. test equipment. data acquisition systems. precision power supplies. crystal oscillators precision 4.0 volt micropower voltage reference issue 1 - january 1996 zra400 v r g nd 1 - 33 schematic diagram
absolute maximum rating reverse current 25ma forward current 25ma operating temperature -40 to 85c storage temperature -55 to 125c power dissipation (t amb =25c) sot23 330mw e-line, 3 pin (to92) 500mw e-line, 2 pin (to92) 500mw so8 625mw 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 =150 m a 4.05 4.01 3.97 4.096 4.096 4.096 4.14 4.18 4.22 1 2 3 v i min minimum operating current 25 50 m a i r recommended operating current 0.05 5 ma t c ? average reverse breakdown voltage temp. co. i r(min) to i r(max) 15 50 ppm/c r s slope resistance 0.55 2 w z r reverse dynamic impedance i r =1ma f = 100hz i ac = 0.1 i r 0.5 1.2 w ? t c = v r change x 1000000 v r x temperature change r s = v r change ( i r ( min ) to i r ( max )) i r ( max ) - i r ( min ) 1 - 35 zra400 zra400 1 - 34 0 reverse characteristics reverse voltage (v) r e v e r se c urr e nt ( m a ) 0 10 20 30 50 4.0 2.0 40 t a =25 c t a =-40c t a =85c 4.06 4.10 4.08 typical characteristics fo r w ard v ol tag e ( v) temperature (c) reference current (ma) frequency (khz) temperature drift slope resistance v current re f ere nce vol t age ( v) sl ope r esi stan ce ( w ) time ( m s) 110 0.1 slope resistance v frequency -40 -20 0 20 40 60 80 forward characteristics forward current (ma) 0.1 1 10 100 1000 i r =150 m ato5ma 0 2.0 4.0 1 0.1 10 100 1000 10 100 1 0.1 0.01 0 1000 2000 0 10 0 2.0 4.0 01 23 4 time ( m s) sl ope re si stan ce ( w ) i r =150 m a i r =1ma i r =5ma 0.4 0.6 0.8 1.0 1.2 1.4 1.6 t a =25c t a =-40c t a =85c 0 10 0 2.0 4.0 transient response (single pulse) transient response (repetitive pulse) input output 40k 150 m a 5ma 150 m a 1k2 5ma input out put 40k 150 m a 5ma 150 m a 1k2 5ma v i n - (v) v r - (v) v i n - (v) v r - (v)
absolute maximum rating reverse current 25ma forward current 25ma operating temperature -40 to 85c storage temperature -55 to 125c power dissipation (t amb =25c) sot23 330mw e-line, 3 pin (to92) 500mw e-line, 2 pin (to92) 500mw so8 625mw 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 =150 m a 4.05 4.01 3.97 4.096 4.096 4.096 4.14 4.18 4.22 1 2 3 v i min minimum operating current 25 50 m a i r recommended operating current 0.05 5 ma t c ? average reverse breakdown voltage temp. co. i r(min) to i r(max) 15 50 ppm/c r s slope resistance 0.55 2 w z r reverse dynamic impedance i r =1ma f = 100hz i ac = 0.1 i r 0.5 1.2 w ? t c = v r change x 1000000 v r x temperature change r s = v r change ( i r ( min ) to i r ( max )) i r ( max ) - i r ( min ) 1 - 35 zra400 zra400 1 - 34 0 reverse characteristics reverse voltage (v) r e v e r se c urr e nt ( m a ) 0 10 20 30 50 4.0 2.0 40 t a =25 c t a =-40c t a =85c 4.06 4.10 4.08 typical characteristics fo r w ard v ol tag e ( v) temperature (c) reference current (ma) frequency (khz) temperature drift slope resistance v current re f ere nce vol t age ( v) sl ope r esi stan ce ( w ) time ( m s) 110 0.1 slope resistance v frequency -40 -20 0 20 40 60 80 forward characteristics forward current (ma) 0.1 1 10 100 1000 i r =150 m ato5ma 0 2.0 4.0 1 0.1 10 100 1000 10 100 1 0.1 0.01 0 1000 2000 0 10 0 2.0 4.0 01 23 4 time ( m s) sl ope re si stan ce ( w ) i r =150 m a i r =1ma i r =5ma 0.4 0.6 0.8 1.0 1.2 1.4 1.6 t a =25c t a =-40c t a =85c 0 10 0 2.0 4.0 transient response (single pulse) transient response (repetitive pulse) input output 40k 150 m a 5ma 150 m a 1k2 5ma input out put 40k 150 m a 5ma 150 m a 1k2 5ma v i n - (v) v r - (v) v i n - (v) v r - (v)
so8 package suffix ? n8 top view 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 e-line, 2 pin package suffix ? y bottom view connection diagrams part no tol% package partmark zra400a03 3 e-line zra40003 zra400a02 2 e-line zra40002 ZRA400A01 1 e-line zra40001 zra400f03 3 sot23 40a zra400f02 2 sot23 40b zra400f01 1 sot23 40c zra400n803 3 so8 zra 40003 zra400n802 2 so8 zra 40002 zra400n801 1 so8 zra 40001 part no tol% package partmark zra400r03 3 e-line * zra400r3 zra400r02 2 e-line * zra400r2 zra400r01 1 e-line * zra400r1 zra400y03 3 e-line ? zra40003 zra400y02 2 e-line ? zra40002 zra400y01 1 e-line ? zra40001 * e-line 3 pin reversed ? e-line 2 pin e-line 3 pin ordering information e-line, 3 pin package suffix ? a bottom view ? pin 1 floating or connected to pin 3 zra400 zra400
so8 package suffix ? n8 top view 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 e-line, 2 pin package suffix ? y bottom view connection diagrams part no tol% package partmark zra400a03 3 e-line zra40003 zra400a02 2 e-line zra40002 ZRA400A01 1 e-line zra40001 zra400f03 3 sot23 40a zra400f02 2 sot23 40b zra400f01 1 sot23 40c zra400n803 3 so8 zra 40003 zra400n802 2 so8 zra 40002 zra400n801 1 so8 zra 40001 part no tol% package partmark zra400r03 3 e-line * zra400r3 zra400r02 2 e-line * zra400r2 zra400r01 1 e-line * zra400r1 zra400y03 3 e-line ? zra40003 zra400y02 2 e-line ? zra40002 zra400y01 1 e-line ? zra40001 * e-line 3 pin reversed ? e-line 2 pin e-line 3 pin ordering information e-line, 3 pin package suffix ? a bottom view ? pin 1 floating or connected to pin 3 zra400 zra400
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