REF1004 1.2V and 2.5V Micropower VOLTAGE REFERENCE FEATURES DESCRIPTION INITIAL ACCURACY: REF1004-1.2 4mV REF1004-2.5 20mV MINIMUM OPERATING CURRENT: REF1004-1.2 10A REF1004-2.5 20A EXCELLENT LONG TERM TEMPERATURE STABILITY VERY LOW DYNAMIC IMPEDANCE OPERATES UP TO 20mA PACKAGE: 8-Lead SOIC 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 BATTERY POWERED TEST EQUIPMENT PORTABLE MEDICAL INSTRUMENTATION PORTABLE COMMUNICATIONS DEVICES A/D AND D/A CONVERTERS NOTEBOOK AND PALMTOP COMPUTERS Typical Operating Circuit NC 1 8 Cathode NC 2 7 NC NC 3 6 Cathode Anode 4 5 NC (Top View) International Airport Industrial Park * Mailing Address: PO Box 11400 Tel: (520) 746-1111 * Twx: 910-952-1111 * Cable: BBRCORP * (c) 1992 Burr-Brown Corporation * 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 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 MIN TYP MAX MIN TYP MAX UNITS IR = 100A 1.231 1.229 1.225 1.235 1.235 1.235 1.239 1.239 1.239 2.490 2.487 2.480 2.500 2.500 2.500 2.511 2.511 2.511 V IMIN IR 20mA 20 MINIMUM OPERATION CURRENT(3) 8 IMIN IR 1mA REVERSE BREAKDOWN VOLTAGE CHANGE WITH CURRENT IR = 100A WIDE BAND NOISE (RMS) 10Hz IR 10kHz IR = 100A LONG TERM STABILITY TA = 25C 0.1C IR = 100A 20 10 ppm/C 12 1 1.5(3) 10 20(3) 1mA IR 20mA REVERSE DYNAMIC IMPEDANCE(3) REF1004-2.5 CONDITIONS 0.2 0.6 0.2 20 A 1 1.5(3) 10 20(3) mV 0.6 60 120 V 20 20 ppm/KHr 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 VZ 0C to +70C 0C to +70C -40C to +85C -40C to +85C 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. ORDERING INFORMATION 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 MODEL REF1004C-1.2 REF1004C-2.5 REF1004I-1.2 REF1004I-2.5 PART MARKING BBREF0412 BBREF0425 BBREF0412 BBREF0425 PACKAGE INFORMATION MODEL PACKAGE REF1004C-1.2 REF1004C-2.5 REF1004I-1.2 REF1004I-2.5 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 FORWARD CHARACTERISTICS 100 1.2 TA = 25C Forward Voltage (V) Reverse Current (A) -40C TA +85C 10 1 0.8 0.4 0.1 0.0 0.2 0.4 0.6 0.8 1.0 1.2 0.0 0.01 1.4 0.1 TEMPERATURE DRIFT 10 100 REVERSE VOLTAGE CHANGE 1.245 16 Output Voltage Change (mV) Reverse Voltage (V) 1 Forward Current (mA) Reverse Voltage (V) 1.240 1.235 1.230 -40C TA +85C 12 8 4 0 1.225 -55 -35 -15 5 25 45 65 Temperature (C) 85 105 -4 0.01 125 100 REVERSE DYNAMIC IMPEDANCE REVERSE DYNAMIC IMPEDANCE 10k f = 25Hz -40C to +85C Dynamic Impedance () Reverse Impedance () 10 1 Reverse Current (mA) 100 10 1 0.1 0.01 0.1 TA = +25C IREF = 100A 1k 100 10 1 0.1 0.1 1 10 10 100 Reverse Current (mA) 100 1k 10k 100k 1M Frequency (Hz) (R) 3 REF1004 TYPICAL PERFORMANCE CURVES 1.2V (CONT) TA = +25C unless otherwise noted. FILTERED OUTPUT NOISE NOISE VOLTAGE 700 70 60 500 Integrated Noise (V) IREF = 100A TA = 25C 400 300 200 100 IREF = 100A 100A R 50 40 C 30 20 10 0 0 10 100 1k 10k 100k 100 1k RESPONSE TIME 1.5 Output 1.0 0.5 36k VOUT VIN 0.0 5 Input 2.5 0 0 100 200 300 Time (Sec) (R) REF1004 10k Cutoff Frequency (Hz) Frequency (Hz) Voltage (V) Noise (nV/Hz) 600 4 400 500 600 100k TYPICAL PERFORMANCE CURVES 2.5V TA = +25C unless otherwise noted. REVERSE VOLTAGE CHANGE REVERSE CHARACTERISTICS 6 100 Output Voltage Change (mV) Reverse Current (A) -40C TA +85C 10 1 5 -40C TA +85C 4 3 2 1 0 -1 0.1 0.0 0.5 1.0 1.5 2.0 2.5 -2 0.01 3.0 0.1 1 10 100 Reverse Current (mA) Reverse Voltage (V) TEMPERATURE DRIFT FORWARD CHARACTERISTICS 1.2 2.520 TA = +25C 2.515 Reference Voltage (V) Forward Voltage (V) 1.0 0.8 0.6 0.4 2.510 2.505 2.500 2.495 2.490 2.485 0.2 2.480 0.0 0.01 2.475 0.1 1 10 -55 100 -35 -15 Forward Current (mA) REVERSE DYNAMIC IMPEDANCE 85 105 125 10k Dynamic Impedance () f = 25Hz -40C to +85C Reverse Impedance () 25 45 65 Temperature (C) REVERSE DYNAMIC IMPEDANCE 1000 100 10 1 0.1 0.01 5 TA = +25C IREF = 100A 1k 100 10 1 0.1 0.1 1 10 100 10 100 1k 10k 100k 1M Frequency (Hz) Reverse Current (mA) (R) 5 REF1004 TYPICAL PERFORMANCE CURVES 2.5V (CONT) TA = +25C unless otherwise noted. NOISE VOLTAGE FILTERED OUTPUT NOISE 1400 120 1200 100 Integrated Noise (V) 800 600 400 R 80 C 60 40 20 200 0 10 100 1k 10k 0 100 100k 1k RESPONSE TIME 4.0 3.0 Output 2.0 24k 1.0 VOUT VIN 0.0 5.0 Input 0.0 0 100 200 300 Time (Sec) (R) REF1004 10k Cutoff Frequency (Hz) Frequency (Hz) Voltage (V) Noise (nV/Hz) IREF = 100A 1000 IREF = 100A 100A 6 400 500 600 100k 1.5V (see Note) VI 5V 3k 100A 1.235V 22 Output + REF1004-1.2 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 5V 510k 50k 1.235V 2.5V REF1004-1.2 REF1004-2.5 FIGURE2. Micropower Reference from 9V Battery. FIGURE 4. 2.5V Reference. Battery Output R1(1) 1% 12V 1M TLC271 LO = Battery Low 133k 1% REF1004-1.2 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