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| REF1004 1.2V and 2.5V Micropower VOLTAGE REFERENCE FEATURES q INITIAL ACCURACY: REF1004-1.2 4mV REF1004-2.5 20mV q MINIMUM OPERATING CURRENT: REF1004-1.2 10A REF1004-2.5 20A q EXCELLENT LONG TERM TEMPERATURE STABILITY q VERY LOW DYNAMIC IMPEDANCE q OPERATES UP TO 20mA q PACKAGE: 8-Lead SOIC DESCRIPTION The REF1004-1.2 and REF1004-2.5 are two terminal bandgap reference diodes designed for high accuracy with outstanding temperature characteristics at low operating currents. Prior to the introduction of the REF1004 Micropower Voltage References, accuracy and stability specifications could only be attained by expensive screening of standard devices. The REF1004 is a cost effective solution when reference voltage accuracy, low power, and long term temperature stability are required. REF1004 is a drop-in replacement for the LT1004 as well as an upgraded replacement of the LM185/385 series references. The REF1004C is characterized for operation from 0C to 70C and the REF1004I is characterized for operation from -40C to +85C. The REF1004 is offered in an 8-lead Plastic SOIC package and shipped in anti-static rails or tape and reel. APPLICATIONS q BATTERY POWERED TEST EQUIPMENT q PORTABLE MEDICAL INSTRUMENTATION q PORTABLE COMMUNICATIONS DEVICES q A/D AND D/A CONVERTERS q NOTEBOOK AND PALMTOP COMPUTERS Typical Operating Circuit NC NC NC Anode 1 2 3 4 8 7 6 5 Cathode NC Cathode NC (Top View) International Airport Industrial Park * Mailing Address: PO Box 11400 Tel: (520) 746-1111 * Twx: 910-952-1111 * Cable: BBRCORP * (c) * Tucson, AZ 85734 * Street Address: 6730 S. Tucson Blvd. * Tucson, AZ 85706 Telex: 066-6491 * FAX: (520) 889-1510 * Immediate Product Info: (800) 548-6132 1992 Burr-Brown Corporation PDS-1172 Printed in U.S.A. October, 1993 SPECIFICATIONS ELECTRICAL TA = +25C unless otherwise noted. REF1004-1.2 PARAMETER REFERENCE VOLTAGE REF1004C(1) REF1004I(2) AVERAGE TEMPERATURE COEFFICIENT MINIMUM OPERATION CURRENT(3) REVERSE BREAKDOWN VOLTAGE CHANGE WITH CURRENT IMIN IR 1mA 1mA IR 20mA CONDITIONS IR = 100A MIN 1.231 1.229 1.225 TYP 1.235 1.235 1.235 20 MAX 1.239 1.239 1.239 MIN 2.490 2.487 2.480 REF1004-2.5 TYP 2.500 2.500 2.500 20 MAX 2.511 2.511 2.511 UNITS V IMIN IR 20mA ppm/C A mV 8 10 1 1.5(3) 10 20(3) 12 20 1 1.5(3) 10 20(3) REVERSE DYNAMIC IMPEDANCE(3) WIDE BAND NOISE (RMS) 10Hz IR 10kHz LONG TERM STABILITY TA = 25C 0.1C IR = 100A IR = 100A 0.2 0.6 0.2 0.6 V ppm/KHr 60 IR = 100A 20 120 20 NOTES: (1) This specification applies over the full operating temperature range of 0C TA 70C. (2) This specification applies over the full operating temperature range of 40C TA +85C. (3) Denotes the specifications which apply over the full operating temperature range. ORDERING INFORMATION MODEL REF1004C-1.2 REF1004C-2.5 REF1004I-1.2 REF1004I-2.5 TA 0C to +70C 0C to +70C -40C to +85C -40C to +85C VZ 1.2V 2.5V 1.2V 2.5V PACKAGE 8-Lead 8-Lead 8-Lead 8-Lead SOIC SOIC SOIC SOIC NOTE: Available in Tape and Reel, Add -TR to Model Number. ABSOLUTE MAXIMUM RATINGS Reverse Breakdown Current ........................................................... 30mA Forward Current ................................................................................ 10mA Operating Temperature Range REF1004C ........................................................................ 0C to +70C REF1004I ...................................................................... -40C to +85C Storage Temperature REF1004C .................................................................. -65C to +150C REF1004I .................................................................... -65C to +150C Lead Temperature (soldering, 10s) ............................................... +300C ORDERING INFORMATION MODEL REF1004C-1.2 REF1004C-2.5 REF1004I-1.2 REF1004I-2.5 PART MARKING BBREF0412 BBREF0425 BBREF0412 BBREF0425 PACKAGE INFORMATION MODEL REF1004C-1.2 REF1004C-2.5 REF1004I-1.2 REF1004I-2.5 PACKAGE 8-Pin 8-Pin 8-Pin 8-Pin SOIC SOIC SOIC SOIC PACKAGE DRAWING NUMBER(1) 182 182 182 182 NOTE: (1) For detailed drawing and dimension table, please see end of data sheet, or Appendix D of Burr-Brown IC Data Book. The information provided herein is believed to be reliable; however, BURR-BROWN assumes no responsibility for inaccuracies or omissions. BURR-BROWN assumes no responsibility for the use of this information, and all use of such information shall be entirely at the user's own risk. Prices and specifications are subject to change without notice. No patent rights or licenses to any of the circuits described herein are implied or granted to any third party. BURR-BROWN does not authorize or warrant any BURR-BROWN product for use in life support devices and/or systems. (R) REF1004 2 TYPICAL PERFORMANCE CURVES 1.2V TA = +25C unless otherwise noted. REVERSE CHARACTERISTICS 100 -40C TA +85C Reverse Current (A) Forward Voltage (V) FORWARD CHARACTERISTICS 1.2 TA = 25C 10 0.8 1 0.4 0.1 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 Reverse Voltage (V) 0.0 0.01 0.1 1 Forward Current (mA) 10 100 TEMPERATURE DRIFT 1.245 16 REVERSE VOLTAGE CHANGE -40C TA +85C 12 Reverse Voltage (V) 1.240 Output Voltage Change (mV) -35 -15 5 25 45 65 Temperature (C) 85 105 125 1.235 8 4 1.230 0 1.225 -55 -4 0.01 0.1 1 Reverse Current (mA) 10 100 REVERSE DYNAMIC IMPEDANCE 100 f = 25Hz -40C to +85C 10 10k REVERSE DYNAMIC IMPEDANCE Reverse Impedance () Dynamic Impedance () 1k TA = +25C IREF = 100A 100 10 1 1 0.1 0.01 0.1 0.1 1 Reverse Current (mA) 10 100 10 100 1k 10k 100k 1M Frequency (Hz) (R) 3 REF1004 TYPICAL PERFORMANCE CURVES 1.2V TA = +25C unless otherwise noted. (CONT) NOISE VOLTAGE 700 600 Noise (nV/Hz) FILTERED OUTPUT NOISE 70 60 Integrated Noise (V) 100A R IREF = 100A 500 400 300 200 100 0 10 100 1k Frequency (Hz) IREF = 100A TA = 25C 50 40 30 20 10 0 C 10k 100k 100 1k 10k 100k Cutoff Frequency (Hz) RESPONSE TIME 1.5 1.0 0.5 Voltage (V) 0.0 VIN 36k VOUT Output 5 2.5 0 0 100 200 Input 300 Time (Sec) 400 500 600 (R) REF1004 4 TYPICAL PERFORMANCE CURVES 2.5V TA = +25C unless otherwise noted. REVERSE CHARACTERISTICS 100 Output Voltage Change (mV) REVERSE VOLTAGE CHANGE 6 -40C TA +85C Reverse Current (A) 5 4 3 2 1 0 -1 -40C TA +85C 10 1 0.1 0.0 0.5 1.0 1.5 2.0 2.5 3.0 Reverse Voltage (V) -2 0.01 0.1 1 Reverse Current (mA) 10 100 FORWARD CHARACTERISTICS 1.2 TA = +25C 1.0 0.8 0.6 0.4 0.2 2.480 0.0 0.01 2.475 0.1 1 Forward Current (mA) 10 100 -55 -35 -15 Reference Voltage (V) Forward Voltage (V) TEMPERATURE DRIFT 2.520 2.515 2.510 2.505 2.500 2.495 2.490 2.485 5 25 45 65 Temperature (C) 85 105 125 REVERSE DYNAMIC IMPEDANCE 1000 f = 25Hz -40C to +85C Reverse Impedance () REVERSE DYNAMIC IMPEDANCE 10k TA = +25C IREF = 100A 100 Dynamic Impedance () 1k 100 10 10 1 1 0.1 0.01 0.1 0.1 1 Reverse Current (mA) 10 100 10 100 1k 10k 100k 1M Frequency (Hz) (R) 5 REF1004 TYPICAL PERFORMANCE CURVES 2.5V TA = +25C unless otherwise noted. (CONT) NOISE VOLTAGE 1400 1200 Noise (nV/Hz) 1000 800 600 400 200 0 10 100 1k Frequency (Hz) 10k 100k Integrated Noise (V) FILTERED OUTPUT NOISE 120 100 80 C 60 40 20 0 100 100A R IREF = 100A IREF = 100A 1k 10k 100k Cutoff Frequency (Hz) RESPONSE TIME 4.0 3.0 2.0 Voltage (V) Output 1.0 VIN 0.0 24k VOUT 5.0 0.0 0 100 200 Input 300 Time (Sec) 400 500 600 (R) REF1004 6 1.5V (see Note) VI 5V 100A 22 Output REF1004-1.2 + 3k 1.235V REF1004-1.2 5F NOTE: Output regulates to 1.285V for IO = 0. FIGURE 1. Low-Noise Reference. FIGURE 3. 1.2V Reference from 1.5V Battery. 9V 510k 1.235V REF1004-1.2 5V 50k 2.5V REF1004-2.5 FIGURE2. Micropower Reference from 9V Battery. FIGURE 4. 2.5V Reference. Battery Output R1(1) 1% 1M 12V TLC271 133k 1% REF1004-1.2 LO = Battery Low NOTE: (1) R1 sets trip point, 60.4k per cell for 1.8V per cell. FIGURE 5. Lead-Acid Low-Battery-Voltage Detector. (R) 7 REF1004 |
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