LM385 / 385B 1.2 & 2.5V MICROPOWER VOLTAGE REFERENCE T H E I N F I N I T E P O W E R O F I N N O V A T I O N P R O D U C T I O N D S A T A H E E T KEY FEATURES DESCRIPTION The LM385/385B Micropower Voltage The LM385 family is available in fixed 1.2V References are two terminal bandgap reference and 2.5V reference values. Process and circuit diodes designed and optimized for accurate low design optimization provides for high accuracy power operation in portable and other power with initial tolerance values of 1% for the sensitive systems. Operating currents are LM385B-1.2, 2% for the LM385-1.2, 1.5% for guaranteed from as low as 15A up to 20mA for the LM385B-2.5, and 3% for the LM385-2.5. the LX385/385B-1.2, and 20A up to 20mA for Complementing their initial accuracy, the the LM385/385B-2.5, giving designers a great bandgap reference is temperature compensated deal of flexibility in optimizing power to deliver 20ppm performance over the 0 to consumption, noise and ultimate application 70C operating temperature range. performance. As an added feature, the The LM385 family from Linfinity is a pin-toreferences output impedance is extraordinarily pin replacement for the LM385/385B family of low over the entire operating range of quiescent voltage references. current. This enables an extremely wide dynamic load range with little effect on the overall reference accuracy. Guaranteed 1% Initial Accuracy (LM385B-1.2) Guaranteed 2.5% Initial Accuracy (LM385-1.2) Guaranteed 1.5% Initial Accuracy (LM385B-2.5) Guaranteed 3.0% Initial Accuracy (LM385-2.5) Guaranteed 20A Operating Current Low Temperature coefficient Operating Current of 20A to 20mA Very Low Dynamic Impedance: 10 APPLICATIONS IMPORTANT: For the most current data, consult MICROSEMI's website: http://www.microsemi.com Portable Meter References Portable Test Instruments Battery Operated Systems Current Loop Instrumentation PRODUCT HIGHLIGHT MICROPOWER REFERENCED FROM 9V BATTERY 9V 1.2V REFERENCE 5V 38K 200K 1.2V 2.5V LM385-1.2V LM385-2.5V TA (C) Reference Voltage 1.2V 0 to 70 2.5V PACKAGE ORDER INFO Plastic SOIC Initial DM 8-Pin Tolerance RoHS Compliant / Pb-free 30mV 12mV 75mV 38mV LP Plastic TO-92 3-Pin Transition DC: 0440 RoHS Compliant / Pb-free Transition DC: 0509 LM385DM-1.2 LM385BDM-1.2 LM385DM-2.5 LM385BDM-2.5 LM385LP-1.2 LM385BLP-1.2 LM385LP-2.5 LM385BLP-2.5 Note: Available in Tape & Reel. Append the letters "TR" to the part number. (i.e. LX385BDM-TR) Copyright (c) 1996 Rev. 1.2a,2005-03-08 LINFINITY MICROELECTRONICS INC. 11861 WESTERN AVENUE, GARDEN GROVE, CA. 92841, 714-898-8121, FAX: 714-893-2570 1 PRODUCT DATABOOK 1996/1997 LM385/385B 1.2 & 2.5V M I C R O P O W E R V O LTA G E R E F E R E N C E P R O D U C T I O N A B S O L U T E M A X I M U M R AT I N G S D A T A S H E E T PACKAGE PIN OUTS (Note 1) Reverse Breakdown Current .................................................................................... 30mA Forward Current ........................................................................................................ 10mA Operating Temperature Range LM385 ........................................................................................................... 0C to 70C Storage Temperature Range ...................................................................... -65C to 150C Lead Temperature (soldering, 10 seconds) ............................................................. 300C Pb-free / RoHS Peak Package Solder Reflow Temp (40second max. exposure) ................ 260C (+0, -5) Note 1. Values beyond which damage may occur. All voltages are specified with respect to ground, and all currents are positive into the specified terminal 8. 2. 7. CATHODE N/C 6. CATHODE 5. N/C 3. 4. DM PACKAGE (Top View) 100% Pb-free / RoHS Matte Tin Lead Finish 2. CATHODE 3. N/C DM PACKAGE: 165C/W LP PACKAGE: THERMAL RESISTANCE-JUNCTION TO AMBIENT, JA 1. 1. ANODE T H E R M A L D ATA THERMAL RESISTANCE-JUNCTION TO AMBIENT, JA N/C N/C N/C ANODE 165C/W LP PACKAGE (Top View) The JA numbers are guidelines for the thermal performance of the device/pc-board system. All of the above assume no ambient airflow. 2 Copyright (c) 1996 Rev. 1.2a 8/04 PRODUCT DATABOOK 1996/1997 LM385/385B 1.2 & 2.5V M I C R O P O W E R V O LTA G E R E F E R E N C E P R O D U C T I O N D A T A S H E E T ELECTRICAL CHARACTERISTICS (Unless otherwise specified, these specifications apply to TA = 25C. Typ number represents TA = 25C value.) LM385/385B-1.2 Parameter Reverse Breakdown Voltage Symbol LM385 LM385B VZ VZ Temp IMIN e IR rz en VZ Time Average Temperature Coefficient Minimum Operating Current Reverse Breakdown Voltage Chang with Current Reverse Dynamic Impedance Wide Band Noise (RMS) Long Term Stability LM385/385B-1.2 Min. Typ. Max. Test Conditions IMIN IR IMAX IMIN IR IMAX IR = 100A 1.205 1.223 VZ IMIN IR 1mA 1mA IR 20mA IR = 100A IR = 100A, 10Hz f 10kHz IR = 100A, TA = 25C 0.1C Units 1.235 1.235 20 1.260 1.247 V V ppm/C 8 15 1.5 20 A mV mV V ppm/kHr 1 60 20 LM385/385B-2.5 Parameter Reverse Breakdown Voltage Symbol LM385 LM385B Average Temperature Coefficient Minimum Operating Current Reverse Breakdown Voltage Chang with Current Reverse Dynamic Impedance Wide Band Noise (RMS) Long Term Stability VZ VZ Temp IMIN e IR rz en VZ Time LM385/385B-2.5 Min. Typ. Max. Test Conditions IMIN IR IMAX IMIN IR IMAX IR = 100A 2.425 2.462 VZ IMIN IR 1mA 1mA IR 20mA IR = 100A, f = 20Hz IR = 100A, 10Hz f 10kHz IR = 100A, TA = 25C 0.1C Units 2.500 2.500 20 2.575 2.538 V V ppm/C 13 20 2 20 A mV mV V ppm/kHr 1 120 20 GRAPH / CURVE INDEX Characteristic Curves LM385/385B-1.2 Characteristic Curves LM385/385B-2.5 FIGURE # FIGURE # 1. RESPONSE TIME 8. RESPONSE TIME 2. REVERSE CHARACTERISTICS 9. REVERSE CHARACTERISTICS 3. FORWARD CHARACTERISTICS 10. FORWARD CHARACTERISTICS 4. TEMPERATURE DRIFT 11. TEMPERATURE DRIFT 5. REVERSE VOLTAGE CHANGE 12. REVERSE DYNAMIC IMPEDANCE 6. REVERSE DYNAMIC IMPEDANCE 13. NOISE VOLTAGE 7. NOISE VOLTAGE Copyright (c) 1996 Rev. 1.2a 8/04 3 PRODUCT DATABOOK 1996/1997 LM385/385B 1.2 & 2.5V M I C R O P O W E R V O LTA G E R E F E R E N C E P R O D U C T I O N D A T A S H E E T C H A R A C T E R I S T I C C U R V E S -- LM385/385B-1.2V FIGURE 1. -- RESPONSE TIME FIGURE 2. -- REVERSE CHARACTERISTICS 1.5V TA = 0 to 70C 1.0V VIN 0.5V 36k Reverse Current - (A) Output Voltage 100 VOUT Input Voltage 0 5V 10 1 0 0.1 0 50 100 500 0 550 0.2 0.4 Time - (s) 0.8 1.0 1.2 1.4 Reverse Voltage - (V) FIGURE 3. -- FORWARD CHARACTERISTICS FIGURE 4. -- TEMPERATURE DRIFT 1.242 1.2 IR = 100A TA = 25C 1.24 Reference Voltage - (V) Forward Voltage - (V) 0.6 0.8 0.4 1.238 1.236 1.234 1.232 1.23 1.228 0 0.01 1.226 0.1 1 10 Forward Current - (mA) 4 100 0 10 20 30 40 50 60 70 Temperature - (C) Copyright (c) 1996 Rev. 1.2a 8/04 PRODUCT DATABOOK 1996/1997 LM385/385B 1.2 & 2.5V M I C R O P O W E R V O LTA G E R E F E R E N C E P R O D U C T I O N D A T A S H E E T C H A R A C T E R I S T I C C U R V E S -- LM385/385B-1.2V FIGURE 5. -- REVERSE VOLTAGE CHANGE FIGURE 6. -- REVERSE DYNAMIC IMPEDANCE 16 1000 TA = 25C IR = 100A 12 TA = 0 to 70C Dynamic Impedance - () Output Voltage Change - (mV) 14 10 8 6 4 2 0 100 10 1 -2 -4 0.01 0.1 0.1 1 10 100 Reverse Current - (mA) 10 100 1k 10k 100k (f) Frequency - (Hz) FIGURE 7. -- NOISE VOLTAGE 800 (VN) Noise Voltage - (nV/ Hz) 700 600 500 400 300 200 100 10 IR = 100A TA = 25C 100 1k 10k 100k (f) Frequency - (Hz) Copyright (c) 1996 Rev. 1.2a 8/04 5 PRODUCT DATABOOK 1996/1997 LM385/385B 1.2 & 2.5V M I C R O P O W E R V O LTA G E R E F E R E N C E P R O D U C T I O N D A T A S H E E T C H A R A C T E R I S T I C C U R V E S -- LM385/385B-2.5V FIGURE 9. -- REVERSE CHARACTERISTICS TA = 25C 2.0V VIN 24K VOUT 0 Input Voltage TA = 25C 100 4.0V Reverse Current - (A) Output Voltage FIGURE 8. -- RESPONSE TIME 10 1 5 0 0.1 0 1.0 Time - (100s/Div.) 2.0 3.0 4.0 5.0 Reverse Voltage - (V) FIGURE 10. -- FORWARD CHARACTERISTICS FIGURE 11. -- TEMPERATURE DRIFT 1.0 2.52 TA = 25C 2.515 Reference Voltage - (V) Forward Voltage - (V) 0.8 0.6 0.4 2.51 2.505 2.5 2.495 2.49 0.2 2.485 0 0.001 0.01 0.1 1 Forward Current - (mA) 6 10 100 2.48 -40 20 0 20 40 60 80 100 Temperature - (C) Copyright (c) 1996 Rev. 1.2a 8/04 PRODUCT DATABOOK 1996/1997 LM385/385B 1.2 & 2.5V M I C R O P O W E R V O LTA G E R E F E R E N C E P R O D U C T I O N D A T A S H E E T C H A R A C T E R I S T I C C U R V E S -- LM385/385B-2.5V FIGURE 12. -- REVERSE DYNAMIC IMPEDANCE FIGURE 13. -- NOISE VOLTAGE 100 (VN) Noise Voltage - (nV/ Hz) Dynamic Impedance - () TA = 25C IR = 100A 10 1 1800 1500 1200 900 600 300 0.1 10 100 1k 10k (f) Frequency - (Hz) Copyright (c) 1996 Rev. 1.2a 8/04 100k 10 IR = 100A TA = 25C 100 1k 10k 100k (f) Frequency - (Hz) 7