LM199/LM399 LM199A/LM399A LY WW __ = FEATURES Guaranteed 0.5 ppm/C temperature coefficient Guaranteed 1.0 Q max. dynamic impedance Guaranteed 20uV RMS max. noise Guaranteed initial tolerance of 2% Wide operating current range APPLICATIONS s Precision voltage reference for multimeters = Calibration equipment voltage standards w Laboratory measurement equipment = Industrial monitor/control instruments w High accuracy data converters 10 Volt Buffered Reference +15V I Precision Reference DESCRIPTION The LM199/399 precision reference features excel- lent temperature stability over a wide range of voltage, temperature, and operating current conditions. A sta- bilizing heater is incorporated with the active zener on a monolithic substrate which nearly eliminates changes in voltage with temperature. The subsurface Zener operates over a current range of 0.5mA to 10mA, and offers minimal noise and excellent long term stability. Ideal applications for the LM199/399 include digital voltmeters, precision calibration equipment, current sources and a variety of other precision low cost refer- ences. A 10 volt buffered reference application is shown below. Reverse Voltage Change STABILIZED (T, = 90) > a 2 NN @ 10V w T, =25C REVERSE VOLTAGE CHANGE (mV) 0 2 4 6 8 10 REVERSE CURRENT (mA) LY Wie 3-115 LM199/LM399 LMI99A/LM399A ABSOLUTE MAXIMUM RATINGS PACKAGE /ORDER INFORMATION Temperature Stabilizer.................4.. 40V Reverse Breakdown Current............... 20mA Forward Current..................0c evens 1imA Reference to Substrate Voltage Vrs), (Note 1). 0.1V Operating Temperature Range TOP VIEW +OX JQ 4. H PKG. TO-46 METAL CAN INSIDE THERMAL SHIELD ORDER PART NO. LM199H, LM199AH LM399H, LM399AH LM199AH-20,LM399AH-50 LM199/199A............... 55C to 125C LM399/399A................00. 0C to 70C FUNCTIONAL BLOCK Storage Temperature Range DIAGRAM LM199/199A............... 65C to 150C LM399/399A............... 65C to 150C Lead Temperature (Soldering, 10 sec.)...... 300C ELECTRICAL CHARACTERISTICS (See Note 2) LM199/199A LM399/399A SYMBOL PARAMETER CONDITIONS MIN TYP MAX MIN TYP MAX UNITS Vz Reverse Breakdown Voltage 0.5mA < I, < 10mA @j68 695 7.1 6.75 695 7.3 V AVz Reverse Breakdown Voltage Change with Current 0.5mA < lI, < 10mA e 6 9 6 12 mV tz Reverse Dynamic Impedance tp = tmA (Note 5) (10<f<100Hz) e 05 1 05 15 2 Temperature Coefficient LM199/LM399 58C < Ty < 85C 03 1 ppm/C +85C < Ta < 125C 5 15 ppm/C AVz 0C < T, < 70C 03 2 ppm/C A Temp LM 199A/LM399A 5C < Ty < 85C 0.2 0.5 ppm/C +85C < Ta < 125C 5 10 ppm/C 0c < T, < 70C 03 #1 ppm/C e, RMS Noise 10Hz < f < 10kHz e 7 20 7 50 uV AVz Long Term Stability Stabilized, 22C < Ty, < 28C 8 Note 3 8 Note 3| ppm/VkH A Time 1000 Hours, Ip = 1mA +0.1% | Temperature Stabilizer T, = +25C, Still Air, Vy = +30V 85 8614 85 = 15 mA q Supply Current T, = 55C (Note 4) 22.28 Vu Temperature Stabilizer Supply Voltage @/9 40 9 40 v Warm-up Time to + 0.05% Vz Va = 30V, Ty = 25C 3 3 Seconds Initial Turn-on Current OV < Vi < 40V, T, = 25C, (See Note 4) 140 200 140 200 mA The @ denotes the specifications which apply over full operating temperature range. Note 1: The substrate is electrically connected to the negative terminal of the temperature stabilizer. The voltage that can be applied to either terminal of the reference is 40V more positive or 0.1V more negative than the substrate. Note 2: These specifications apply for 30V applied to the temperature stabilizer and 55C < T, < 125C for the LM 199; and 0C < Ty < 70C for the LM399. 3-116 Note 3: Devices with maximum guaranteed long term stability of 20 ppm/-VkH are available. Drift decreases with time. Note 4: This initial current can be reduced by adding an appropriate resistor and capacitor to the heater circuit. See the performance characteristic graphs to determine values. Note 5: Guaranteed by Reverse Breakdown Change with Current. LI the LM199/LM399 __LMI99A/LM399A TYPICAL PERFORMANCE CHARACTERISTICS Reverse Characteristics Dynamic Impedance Stabilization Time 100 - 100 1 0 T, = 25C 2 a = 10 e a = 10 _ 71, = 55C E 3 STABILIZED = -1 f i] = (T, =90C) = 10 # = / ra = 5 -2 f 2 Tj, = 25C am So So y 2 A; Zz 10 T, = 25C i m of = Zn z 3 1 a _- / / aa ! Va = 18V 4 0.01 / | | 0.1 -4 . | 6.25 6.45 6.65 6.85 7.05 10 100 4k 10k 100k 0 4 8 12 16 20 REVERSE VOLTAGE (V) FREQUENCY (Hz) HEATER ON TIME (SEC) Initial Heater Current Heater Current Heater Current 250 rT 80 160 _ V4 = 40V 140 = 200 120 _ ze 60 = z PN 5 Ms oa =< = x ac 40 = 48 e ~ 2 3 = =< 100 ~~ cc & 60 - x rw z = fe a = ~ 20 = 40 Zz 50 20 0 0 0 -55 -35 ~-15 5 25 45 65 85 105 125 -5 -35 -15 5 25 45 65 85 105 0 2 4 6 8 10 12 14 16 18 TURN ON TEMPERATURE (C) TEMPERATURE (C} TIME (SEC) Zener Noise Voltage Response Time Limiting Surge Current 200 8 800 7 e = 700 6 [- STABILIZED 5 _ 5 (T; = 90C) 1 = 25C 2 600 = is =, e 25C (46 mA) 2 g g 500 5C (60 mA) 2 = 3 = 15C (71 ma) = a 2 = 400 35C (87 mA) us a 3 300 55C (105 mA) SF 100 \ STABILIZED (T; ~ 90C) __| 2 0 zB " el > 20 3 200 T, = 25C 10 = 100 0 50 0 10 20 30 40 0 100 200 300 400 10 100 1k 10k 100k MINIMUM SUPPLY VOLTAGE (V) FREQUENCY (Hz) TIME (us) Heater must be bypassed with a 2 uF or larger tantalum capacitor if resistors are used. a ae Oh Le 3117 LM199/LM399 LMI99A/LM399A TYPICAL PERFORMANCE CHARACTERISTICS Long Term Reference Performance 44 Units Tested Low Frequency Noise Voltage 42 10 ; 3 SIGMA ] _ = = E S & 3 = 6 oa ir i = = B f ' - 4 3 MEAN ee 2 = ~~ Z 7 0 2 4 6 8 40 12 0 50 100 150 200 250 MONTHS TIME (SEC.) TYPICAL APPLICATIONS Single Supply Operation QV to 40V TY 4 Rs + tt ean A Negative Heater Supply with Split Supply Operation Positive Reference + 15V +15V SF 2 < > 7.5k $ 7.5k 9VTO 33V Lt Portable Calibrator 15V to 20V 1% REGULATED 7.5k 1270 18v 12k io + 0.1% : eosv | {20k 2k Ls LMIG9A Bk ep + 3-118 nee SCHEMATIC DIAGRAMS LM199/LM399 UMI99A/LM399A Temperature Stabilizer Reference G+ py o} Q10 + BV q o12 + --+ 15pF 30pF q 013 Q16 2k 10k Q11 02 6.3V 2k 2.6k 30k i) - + +Z] - 3 | H Package, 4 Lead Thermal Shield * TO-46 Metal Can For T0-46, H Package 0.209 0.219 << (5.309 5,564) 0.399-0.409 94 (10.135 10.389) tl i, 0.178 - 0.195 TY (4.521 4.953) 0.085 0.105 0,015 | (2.159 2.667) 0.500 (9.381) | (12.70) Max | \ 0.224~-0.234 MIN} | (6.690 5.943 4 t UUU te SEATING PLANE ' 025 y | ( | (0.635) 0.0160.019 7 MAX 0.400 0016-0018 406 0.4 ee _ 016-0. (0 406-9 83) aa 20180018 oy rp 0.050 _0.100 (1.270) (2.540) 0.050 Typ TYP (1.270) TYP 0.100 ~~ (2.540) 0.050 0.038 0.046 0.028 = 0.048. > (0.711 1.219) (1.270) Thermal Shield Material is Valox Valox is a registered trademark of General Etectric LY Wine 3-119