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 10µA REF1004-2.5 20µA ● 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 0°C to 70°C and the REF1004I is characterized for operation from –40°C to +85°C. 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 • © SBVS002 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 = +25°C unless otherwise noted. REF1004-1.2 PARAMETER REFERENCE VOLTAGE REF1004C(1) REF1004I(2) AVERAGE TEMPERATURE COEFFICIENT MIN TYP MAX MIN TYP MAX UNITS IR = 100µA 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 = 100µA WIDE BAND NOISE (RMS) 10Hz ≤ IR ≤ 10kHz IR = 100µA LONG TERM STABILITY TA = 25°C ± 0.1°C IR = 100µA 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 µA 1 1.5(3) 10 20(3) mV 0.6 Ω 60 120 µV 20 20 ppm/KHr NOTES: (1) This specification applies over the full operating temperature range of 0°C ≤ TA ≤ 70°C. (2) This specification applies over the full operating temperature range of 40°C ≤ TA ≤ +85°C. (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 0°C to +70°C 0°C to +70°C –40°C to +85°C –40°C to +85°C 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 ........................................................................ 0°C to +70°C REF1004I ...................................................................... –40°C to +85°C Storage Temperature REF1004C .................................................................. –65°C to +150°C REF1004I .................................................................... –65°C to +150°C Lead Temperature (soldering, 10s) ............................................... +300°C 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. ® REF1004 2 TYPICAL PERFORMANCE CURVES 1.2V TA = +25°C unless otherwise noted. REVERSE CHARACTERISTICS FORWARD CHARACTERISTICS 100 1.2 TA = 25°C Forward Voltage (V) Reverse Current (µA) –40°C ≤ TA ≤ +85°C 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 –40°C ≤ TA ≤ +85°C 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 –40°C to +85°C Dynamic Impedance (Ω) Reverse Impedance (Ω) 10 1 Reverse Current (mA) 100 10 1 0.1 0.01 0.1 TA = +25°C IREF = 100µA 1k 100 10 1 0.1 0.1 1 10 10 100 Reverse Current (mA) 100 1k 10k 100k 1M Frequency (Hz) ® 3 REF1004 TYPICAL PERFORMANCE CURVES 1.2V (CONT) TA = +25°C unless otherwise noted. FILTERED OUTPUT NOISE NOISE VOLTAGE 700 70 60 500 Integrated Noise (µV) IREF = 100µA TA = 25°C 400 300 200 100 IREF = 100µA 100µA 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 36kΩ VOUT VIN 0.0 5 Input 2.5 0 0 100 200 300 Time (µSec) ® REF1004 10k Cutoff Frequency (Hz) Frequency (Hz) Voltage (V) Noise (nV/√Hz) 600 4 400 500 600 100k TYPICAL PERFORMANCE CURVES 2.5V TA = +25°C unless otherwise noted. REVERSE VOLTAGE CHANGE REVERSE CHARACTERISTICS 6 100 Output Voltage Change (mV) Reverse Current (µA) –40°C ≤ TA ≤ +85°C 10 1 5 –40°C ≤ TA ≤ +85°C 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 = +25°C 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 (Ω) f = 25Hz –40°C to +85°C Reverse Impedance (Ω) 25 45 65 Temperature (°C) REVERSE DYNAMIC IMPEDANCE 1000 100 10 1 0.1 0.01 5 TA = +25°C IREF = 100µA 1k 100 10 1 0.1 0.1 1 10 100 10 100 1k 10k 100k 1M Frequency (Hz) Reverse Current (mA) ® 5 REF1004 TYPICAL PERFORMANCE CURVES 2.5V (CONT) TA = +25°C unless otherwise noted. NOISE VOLTAGE FILTERED OUTPUT NOISE 1400 120 1200 100 Integrated Noise (µV) 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 24kΩ 1.0 VOUT VIN 0.0 5.0 Input 0.0 0 100 200 300 Time (µSec) ® REF1004 10k Cutoff Frequency (Hz) Frequency (Hz) Voltage (V) Noise (nV/√Hz) IREF = 100µA 1000 IREF = 100µA 100µA 6 400 500 600 100k 1.5V (see Note) VI ≥ 5V 3kΩ 100µA 1.235V 22Ω Output + REF1004-1.2 REF1004-1.2 5µF 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 510kΩ 50kΩ 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 1MΩ TLC271 LO = Battery Low 133kΩ 1% REF1004-1.2 NOTE: (1) R1 sets trip point, 60.4kΩ per cell for 1.8V per cell. FIGURE 5. Lead-Acid Low-Battery-Voltage Detector. ® 7 REF1004 IMPORTANT NOTICE Texas Instruments and its subsidiaries (TI) reserve the right to make changes to their products or to discontinue any product or service without notice, and advise customers to obtain the latest version of relevant information to verify, before placing orders, that information being relied on is current and complete. All products are sold subject to the terms and conditions of sale supplied at the time of order acknowledgment, including those pertaining to warranty, patent infringement, and limitation of liability. TI warrants performance of its semiconductor products to the specifications applicable at the time of sale in accordance with TI’s standard warranty. Testing and other quality control techniques are utilized to the extent TI deems necessary to support this warranty. Specific testing of all parameters of each device is not necessarily performed, except those mandated by government requirements. Customers are responsible for their applications using TI components. In order to minimize risks associated with the customer’s applications, adequate design and operating safeguards must be provided by the customer to minimize inherent or procedural hazards. TI assumes no liability for applications assistance or customer product design. TI does not warrant or represent that any license, either express or implied, is granted under any patent right, copyright, mask work right, or other intellectual property right of TI covering or relating to any combination, machine, or process in which such semiconductor products or services might be or are used. TI’s publication of information regarding any third party’s products or services does not constitute TI’s approval, warranty or endorsement thereof. Copyright 2000, Texas Instruments Incorporated