MICROPOWER VOLTAGE REFERENCE DIODES

Order this document by LM285/D LM285 Micropower Voltage Reference Diodes The LM285/LM385 series are micropower two–terminal bandgap voltage regulator diodes. Designed to operate over a wide current range of 10 µA to 20 mA, these devices feature exceptionally low dynamic impedance, low noise and stable operation over time and temperature. Tight voltage tolerances are achieved by on–chip trimming. The large dynamic operating range enables these devices to be used in applications with widely varying supplies with excellent regulation. Extremely low operating current make these devices ideal for micropower circuitry like portable instrumentation, regulators and other analog circuitry where extended battery life is required. The LM285/LM385 series are packaged in a low cost TO–226AA plastic case and are available in two voltage versions of 1.235 and 2.500 V as denoted by the device suffix (see Ordering Information table). The LM285 is specified over a –40°C to +85°C temperature range while the LM385 is rated from 0°C to +70°C. The LM385 is also available in a surface mount plastic package in voltages of 1.235 and 2.500 V. • Operating Current from 10 µA to 20 mA LM385, B MICROPOWER VOLTAGE REFERENCE DIODES SEMICONDUCTOR TECHNICAL DATA Z SUFFIX PLASTIC PACKAGE CASE 29 (Bottom View) 3 2 1 N.C. Cathode Anode D SUFFIX PLASTIC PACKAGE CASE 751 (SO–8) N.C. 1 N.C. 2 N.C. 3 Anode 4 • • • • 1.0%, 1.5%, 2.0% and 3.0% Initial Tolerance Grades Low Temperature Coefficient 1.0 Ω Dynamic Impedance Surface Mount Package Available 8 Cathode 7 N.C. 6 N.C. 5 N.C. Standard Application 1.5 V Battery + – 3.3 k 1.235 V LM385–1.2 Representative Schematic Diagram Cathode 360 k Open for 1.235 V 10 k ORDERING INFORMATION Reverse Break– Operating Temperature down Voltage Tolerance Range TA = – 40° to +85°C 1.235 V 2.500 V 1.235 V 1.235 V 2.500 V 2.500 V ± 1.0% ± 1.5% ± 1.0% ± 2.0% ± 1.5% ± 3.0% 600 k Device 8.45 k LM285D–1.2 LM285Z–1.2 LM285D–2.5 LM285Z–2.5 600 k 425 k LM385BD–1.2 LM385BZ–1.2 LM385D–1.2 LM385Z–1.2 74.3 k Open for 2.5 V 600 k 500 Ω 100 k LM385BD–2.5 LM385BZ–2.5 LM385D–2.5 LM385Z–2.5 TA = 0° to +70°C Anode © Motorola, Inc. 1996 Rev 2 MOTOROLA ANALOG IC DEVICE DATA 1 LM285 LM385, B MAXIMUM RATINGS (TA = 25°C, unless otherwise noted) Rating Reverse Current Forward Current Operating Ambient Temperature Range LM285 LM385 Operating Junction Temperature Storage Temperature Range Symbol IR IF TA – 40 to + 85 0 to +70 TJ Tstg + 150 – 65 to + 150 °C °C Value 30 10 Unit mA mA °C ELECTRICAL CHARACTERISTICS (TA = 25°C, unless otherwise noted) LM285–1.2 Characteristic Reverse Breakdown Voltage (IRmin LM285–1.2/LM385B–1.2 TA = Tlow to Thigh (Note 1) LM385–1.2 TA = Tlow to Thigh (Note 1) Minimum Operating Current TA = 25°C TA = Tlow to Thigh (Note 1) Reverse Breakdown Voltage Change with Current IRmin IR 1.0 mA, TA = +25°C TA = Tlow to Thigh (Note 1) 1.0 mA IR 20 mA, TA = +25°C TA = Tlow to Thigh (Note 1) LM385–1.2/LM385B–1.2 Max 1.247 1.270 – – 10 20 1.0 1.5 10 20 – – – – Min 1.223 1.210 1.205 1.192 – – – – – – – – – – Typ 1.235 – 1.235 – 8.0 – – – – – 0.6 80 60 20 Max 1.247 1.260 1.260 1.273 µA – – ∆V(BR)R – – – – Z ∆V(BR)/∆T n S – – – – – – – 0.6 80 60 20 1.0 1.5 20 25 – – – – W ppm/°C µV ppm/ kHR 8.0 – 15 20 mV Unit V 1.223 1.200 – – IRmin 1.235 – – – Symbol V(BR)R Min Typ p IR p 20 mA) p p p p Reverse Dynamic Impedance IR = 100 µA, TA = +25°C Average Temperature Coefficient 10 µA IR 20 mA, TA = Tlow to Thigh (Note 1) p p Wideband Noise (RMS) IR = 100 µA, 10 Hz f p p 10 kHz Long Term Stability IR = 100 µA, TA = +25°C ± 0.1°C 2 MOTOROLA ANALOG IC DEVICE DATA LM285 LM385, B ELECTRICAL CHARACTERISTICS (TA = 25°C, unless otherwise noted) LM285–2.5 Characteristic Reverse Breakdown Voltage (IRmin LM285–2.5/LM385B–2.5 TA = Tlow to Thigh (Note 1) LM385–2.5 TA = Tlow to Thigh (Note 1) Minimum Operating Current TA = 25°C TA = Tlow to Thigh (Note 1) Reverse Breakdown Voltage Change with Current IRmin IR 1.0 mA, TA = +25°C TA = Tlow to Thigh (Note 1) 1.0 mA IR 20 mA, TA = +25°C TA = Tlow to Thigh (Note 1) LM385–2.5/LM385B–2.5 Max 2.538 2.585 – – 20 30 1.0 1.5 10 20 – – – – Min 2.462 2.436 2.425 2.400 – – – – – – – – – – Typ 2.5 – 2.5 – 13 – – – – – 0.6 80 120 20 Max 2.538 2.564 2.575 2.600 µA – – ∆V(BR)R – – – – Z ∆V(BR)/∆T n S – – – – – – – 0.6 80 120 20 2.0 2.5 20 25 – – – – W ppm/°C µV ppm/ kHR 13 – 20 30 mV Unit V 2.462 2.415 – – IRmin 2.5 – – – Symbol V(BR)R Min Typ p IR p 20 mA) p p p p p p Reverse Dynamic Impedance IR = 100 µA, TA = +25°C Average Temperature Coefficient 20 µA IR 20 mA, TA = Tlow to Thigh (Note 1) Wideband Noise (RMS) IR = 100 µA, 10 Hz f p p 10 kHz Long Term Stability IR = 100 µA, TA = +25°C ± 0.1°C NOTES: 1. Tlow = – 40°C for LM285–1.2, LM285–2.5 = 0°C for LM385–1.2, LM385B–1.2, LM385–2.5, LM385B–2.5 Thigh = +85°C for LM285–1.2, LM285–2.5 Thigh = +70°C for LM385–1.2, LM385B–1.2, LM385–2.5, LM385B–2.5 MOTOROLA ANALOG IC DEVICE DATA 3 LM285 LM385, B TYPICAL PERFORMANCE CURVES FOR LM285–1.2/385–1.2/385B–1.2 Figure 1. Reverse Characteristics 100 IR, REVERSE CURRENT ( µ A) ∆V(BR)R, REVERSE VOLTAGE CHANGE (mV) Figure 2. Reverse Characteristics 10 8.0 6.0 + 25°C 4.0 – 40°C 2.0 0 –2.0 0.01 0.1 1.0 10 IR, REVERSE CURRENT (mA) 100 TA = + 85°C 10 1.0 TA = + 85°C + 25°C 0.1 0 0.2 – 40°C 1.2 1.4 0.4 0.6 0.8 1.0 V(BR), REVERSE VOLTAGE (V) Figure 3. Forward Characteristics 1.250 V(BR)R, REVERSE VOLTAGE (V) VF, FORWARD VOLTAGE (V) 1.2 1.0 0.8 0.6 0.4 0.2 0 0.01 0.1 1.0 10 IF , FORWARD CURRENT (mA) 100 + 25°C + 85°C TA = – 40°C Figure 4. Temperature Drift 1.240 IR = 100 µA 1.230 1.220 1.210 –50 –25 0 25 50 75 TA , AMBIENT TEMPERATURE (°C) 100 125 Figure 5. Noise Voltage 875 OUTPUT (V) 750 1.50 1.25 1.00 0.75 0.50 0.25 375 INPUT (V) 250 125 0 10 100 1.0 K f, FREQUENCY (Hz) 10 K 100 k 0 10 5.0 0 0 0.1 Figure 6. Response Time Input √Hz) 100 k Output 625 500 e n , NOISE (nV/ DUT 0.2 0.3 0.6 0.7 t, TIME (ms) 0.8 0.9 1.0 1.1 4 MOTOROLA ANALOG IC DEVICE DATA LM285 LM385, B TYPICAL PERFORMANCE CURVES FOR LM285–2.5/385–2.5/385B–2.5 Figure 7. Reverse Characteristics 100 IR, REVERSE CURRENT ( µ A) ∆V(BR)R, REVERSE VOLTAGE CHANGE (mV) Figure 8. Reverse Characteristics 10 8.0 6.0 + 25°C 4.0 2.0 0 –2.0 0.01 0.1 1.0 10 IR, REVERSE CURRENT (mA) 100 – 40°C TA = + 85°C 10 TA = + 85°C + 25°C 1.0 – 40°C 0.1 0 0.5 1.0 1.5 2.0 2.5 V(BR), REVERSE VOLTAGE (V) 3.0 3.5 Figure 9. Forward Characteristics 2.520 2.510 2.500 2.490 2.480 2.470 2.460 2.450 0.1 1.0 10 IF , FORWARD CURRENT (mA) 100 –50 Figure 10. Temperature Drift V(BR)R, REVERSE VOLTAGE (V) VF, FORWARD VOLTAGE (V) 1.2 1.0 TA = – 40°C 0.8 0.6 0.4 0.2 0 0.01 + 25°C + 85°C IR = 100 µA –25 0 25 50 75 TA , AMBIENT TEMPERATURE (°C) 100 125 Figure 11. Noise Voltage 3.00 2.50 OUTPUT (V) 1500 Figure 12. Response Time Input √Hz) 2.00 1.50 1.00 0.50 0 DUT 100 k Output 1250 e n , NOISE (nV/ 1000 750 INPUT (V) 10 100 1.0 K f, FREQUENCY (Hz) 10 K 100 k 500 250 0 10 5.0 0 0 0.1 0.2 0.3 0.6 0.7 t, TIME (ms) 0.8 0.9 1.0 1.1 MOTOROLA ANALOG IC DEVICE DATA 5 LM285 LM385, B OUTLINE DIMENSIONS Z SUFFIX PLASTIC PACKAGE CASE 29–04 ISSUE AD B A R P SEATING PLANE F L K NOTES: 1. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982. 2. CONTROLLING DIMENSION: INCH. 3. CONTOUR OF PACKAGE BEYOND DIMENSION R IS UNCONTROLLED. 4. DIMENSION F APPLIES BETWEEN P AND L. DIMENSION D AND J APPLY BETWEEN L AND K MINIMUM. LEAD DIMENSION IS UNCONTROLLED IN P AND BEYOND DIMENSION K MINIMUM. DIM A B C D F G H J K L N P R V INCHES MIN MAX 0.175 0.205 0.170 0.210 0.125 0.165 0.016 0.022 0.016 0.019 0.045 0.055 0.095 0.105 0.015 0.020 0.500 ––– 0.250 ––– 0.080 0.105 ––– 0.100 0.115 ––– 0.135 ––– MILLIMETERS MIN MAX 4.45 5.20 4.32 5.33 3.18 4.19 0.41 0.55 0.41 0.48 1.15 1.39 2.42 2.66 0.39 0.50 12.70 ––– 6.35 ––– 2.04 2.66 ––– 2.54 2.93 ––– 3.43 ––– X X G H V 1 D J C SECTION X–X N N –A– 8 5 D SUFFIX PLASTIC PACKAGE CASE 751–05 (SO–8) ISSUE N –B– 1 4 4X P 0.25 (0.010) M B M NOTES: 1. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982. 2. CONTROLLING DIMENSION: MILLIMETER. 3. DIMENSIONS A AND B DO NOT INCLUDE MOLD PROTRUSION. 4. MAXIMUM MOLD PROTRUSION 0.15 (0.006) PER SIDE. 5. DIMENSION D DOES NOT INCLUDE DAMBAR PROTRUSION. ALLOWABLE DAMBAR PROTRUSION SHALL BE 0.127 (0.005) TOTAL IN EXCESS OF THE D DIMENSION AT MAXIMUM MATERIAL CONDITION. DIM A B C D F G J K M P R MILLIMETERS MIN MAX 4.80 5.00 3.80 4.00 1.35 1.75 0.35 0.49 0.40 1.25 1.27 BSC 0.18 0.25 0.10 0.25 0_ 7_ 5.80 6.20 0.25 0.50 INCHES MIN MAX 0.189 0.196 0.150 0.157 0.054 0.068 0.014 0.019 0.016 0.049 0.050 BSC 0.007 0.009 0.004 0.009 0_ 7_ 0.229 0.244 0.010 0.019 G C –T– 8X SEATING PLANE R X 45 _ F D 0.25 (0.010) M K T B M_ S J S A 6 MOTOROLA ANALOG IC DEVICE DATA LM285 LM385, B Motorola reserves the right to make changes without further notice to any products herein. Motorola makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does Motorola assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation consequential or incidental damages. “Typical” parameters which may be provided in Motorola data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including “Typicals” must be validated for each cu