REF3033-Q1 www.ti.com SBVS131 - JANUARY 2010 50 ppm/C MAX, 50 A, CMOS VOLTAGE REFERENCE Check for Samples: REF3033-Q1 FEATURES 1 * * * * * * DBZ PACKAGE (TOP VIEW) Qualified for Automotive Applications Low Dropout Voltage: 1 mV High Output Current: 25 mA High Accuracy: 0.2% Low Quiescent Current: 50 A (Max) Excellent Specified Drift Performance - 50 ppm/C (Max), TA = 0C to 70C - 75 ppm/C (Max), TA = -40C to 85C IN 1 OUT 2 GND 3 DROPOUT VOLTAGE vs LOAD CURRENT 350 * * * * Portable, Battery-Powered Equipment Data Acquisition Systems Medical Equipment Hand-Held Test Equipment Dropout Voltage (mV) 300 APPLICATIONS 250 200 150 100 50 0 0 5 10 15 20 25 30 Load Current (mA) DESCRIPTION The REF30xx is a precision low-power low-dropout voltage reference family available in a tiny SOT23-3 (DBV) package. The REF30xx small size and low power consumption (50 A max) make it ideal for portable and battery-powered applications. The REF30xx does not require a load capacitor. Unloaded, the REF30xx can be operated with supplies within 1 mV of output voltage. The device is specified for the temperature range of -40C to 85C. ORDERING INFORMATION (1) PACKAGE (2) TA -40C to 85C (1) (2) SOT-23 - DBV Reel of 3000 ORDERABLE PART NUMBER REF3033AIDBZRQ1 TOP-SIDE MARKING REFI For the most current package and ordering information, see the Package Option Addendum at the end of this document, or see the TI web site at www.ti.com. Package drawings, thermal data, and symbolization are available at www.ti.com/packaging. 1 Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of the Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. Copyright (c) 2010, Texas Instruments Incorporated REF3033-Q1 SBVS131 - JANUARY 2010 www.ti.com This integrated circuit can be damaged by ESD. Texas Instruments recommends that all integrated circuits be handled with appropriate precautions. Failure to observe proper handling and installation procedures can cause damage. ESD damage can range from subtle performance degradation to complete device failure. Precision integrated circuits may be more susceptible to damage because very small parametric changes could cause the device not to meet its published specifications. ABSOLUTE MAXIMUM RATINGS (1) Input voltage 7 Output short-circuit duration (2) V Continuous Operating temperature range -40 to 85 C Storage temperature range -65 to 150 C 150 C Junction temperature (TJ max) ESD rating (1) (2) Human-body model (HBM) 2000 Charged-device model (CDM) 1000 V Stresses above these ratings may cause permanent damage. Exposure to absolute maximum conditions for extended periods may degrade device reliability. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those specified is not implied. Short circuit to ground ELECTRICAL CHARACTERISTICS Boldface limits apply over the specified temperature range, TA = -40C to 85C. TA = 25C, ILOAD = 0, VIN = 5 V (unless otherwise noted) PARAMETER CONDITIONS MIN TYP MAX UNIT 2.7 V < VIN < 18 V 3.294 3.3 3.306 V 0.2 % OUTPUT VOLTAGE Output voltage VOUT Initial accuracy NOISE Output voltage noise f = 0.1 Hz to 10 Hz 36 VPP Voltage noise f = 10 Hz to 10 kHz 105 Vrms VREF + 50 mV VIN 5.5 V 130 400 V/V LINE REGULATION OUTPUT VOLTAGE TEMPERATURE DRIFT (1) dVOUT/dT 0C TA 70C 20 50 ppm/C -30C TA 85C 28 60 ppm/C -40C TA 85C 30 65 ppm/C LONG-TERM STABILITY LOAD REGULATION dVOUT/dILOA (2) D THERMAL HYSTERESIS (3) DROPOUT VOLTAGE 2 ppm 15 ppm 0 mA < ILOAD < 25 mA VIN = VREF + 500 mV 3 100 V/mA dT 25 100 ppm 1 50 mV ISC 45 mA 120 s TURN-ON SETTLING TIME (3) 24 VIN - VOUT SHORT-CIRCUIT CURRENT (1) (2) 0 to 1000 h 1000 h to 2000 h To 0.1%, VIN = 5 V, CL = 1 F Box Method used to determine over temperature drift. Typical value of load regulation reflects measurements using a force and sense contacts, see Load Regulation in Application Information. For more detail on the thermal hysteresis procedure, see Thermal Hysteresis in Application Information. Submit Documentation Feedback Copyright (c) 2010, Texas Instruments Incorporated Product Folder Link(s): REF3033-Q1 REF3033-Q1 www.ti.com SBVS131 - JANUARY 2010 ELECTRICAL CHARACTERISTICS (continued) Boldface limits apply over the specified temperature range, TA = -40C to 85C. TA = 25C, ILOAD = 0, VIN = 5 V (unless otherwise noted) PARAMETER CONDITIONS MIN ILOAD = 0 (4) -40C TA 85C TYP MAX UNIT VREF + 0.001 5.5 V VREF + 0.05 5.5 POWER SUPPLY Supply voltage VS Over temperature Quiescent current 42 -40C TA 85C Over temperature 50 A 59 A TEMPERATURE RANGE Specified range -40 85 C Operating range -40 85 C Thermal resistance (4) Junction to case JC 110 C/W Junction to free air JA 336 C/W For ILOAD > 0, see Typical Characteristics. Submit Documentation Feedback Copyright (c) 2010, Texas Instruments Incorporated Product Folder Link(s): REF3033-Q1 3 REF3033-Q1 SBVS131 - JANUARY 2010 www.ti.com TYPICAL CHARACTERISTICS TEMPERATURE DRIFT (-40C to +125C) 50 100 45 90 40 80 35 70 Number of Units Number of Units TEMPERATURE DRIFT (0C to +70C) 30 25 20 15 60 50 40 30 10 20 5 10 0 0 5 10 15 20 25 30 35 40 45 50 55 60 65 5 10 15 20 25 30 35 40 45 50 55 60 65 Drift (ppm/C) Drift (ppm/C) OUTPUT VOLTAGE vs TEMPERATURE MAXIMUM LOAD CURRENT vs TEMPERATURE 35 Maximum Load Current (mA) 2.502 Output Voltage (V) 2.500 2.498 2.496 2.494 2.492 30 25 20 15 10 5 2.490 -40 -20 0 20 40 60 80 100 120 140 -40 -20 0 Temperature (C) 60 80 100 120 140 QUIESCENT CURRENT vs TEMPERATURE 6 60 5 50 4 40 IQ (A) Load Regulation (V/mA) 40 Temperature (C) LOAD REGULATION vs TEMPERATURE 3 30 2 20 1 10 0 0 -40 -20 0 20 40 60 80 100 120 140 -40 -20 Temperature (C) 4 20 0 20 40 60 80 100 120 140 Temperature (C) Submit Documentation Feedback Copyright (c) 2010, Texas Instruments Incorporated Product Folder Link(s): REF3033-Q1 REF3033-Q1 www.ti.com SBVS131 - JANUARY 2010 TYPICAL CHARACTERISTICS (continued) OUTPUT IMPEDANCE vs FREQUENCY LINE REGULATION vs TEMPERATURE 100 150 Output Impedance (dB) Line Regulation (V/V) 200 100 50 0 -50 10 1 0.1 0.01 -40 -20 0 20 40 60 80 100 120 1 140 10 100 POWER-SUPPLY REJECTION RATIO vs FREQUENCY 10k 100k OUTPUT VOLTAGE vs SUPPLY VOLTAGE (No Load) 2.500010 80 2.500000 70 2.499990 Output Voltage (V) 90 60 PSRR (dB) 1k Frequency (Hz) Temperature (C) 50 40 30 2.499980 2.499970 2.499960 2.499950 20 2.499940 10 2.499930 0 2.499920 1 10 100 1k 10k 100k 2.5 3 3.5 4 Frequency (Hz) 4.5 5 5.5 6 Supply (V) OUTPUT VOLTAGE vs SUPPLY VOLTAGE (ILOAD = 25mA) OUTPUT VOLTAGE vs LOAD CURRENT 2.500010 2.500200 2.500000 2.500100 Output Voltage (V) Output Voltage (V) 2.500000 2.499900 2.499800 2.499700 2.499600 2.499500 2.499990 2.499980 2.499970 2.499960 2.499950 2.499940 2.499400 2.499930 2.499300 0 2.5 3 3.5 4 4.5 5 5.5 6 5 10 15 20 25 30 Load Current (mA) Supply (V) Submit Documentation Feedback Copyright (c) 2010, Texas Instruments Incorporated Product Folder Link(s): REF3033-Q1 5 REF3033-Q1 SBVS131 - JANUARY 2010 www.ti.com TYPICAL CHARACTERISTICS (continued) 5V/div VOUT STEP RESPONSE, CL = 0, 5V STARTUP VIN 1V/div 3V/div VIN 1V/div STEP RESPONSE, CL = 0, 3V STARTUP VOUT 40s/div 10s/div LINE TRANSIENT RESPONSE 0-1mA LOAD TRANSIENT (CL = 0) VIN IL = 0mA 20mV/div 50mV/div 500mV/div IL = 1mA VOUT VOUT 10s/div 10s/div 0-5mA LOAD TRANSIENT (CL = 0) 1-6mA LOAD TRANSIENT (CL =1F) IL = 5mA IL = 6mA 20mV/div 20mV/div IL = 0mA VOUT VOUT 10s/div 6 IL = 0mA 40s/div Submit Documentation Feedback Copyright (c) 2010, Texas Instruments Incorporated Product Folder Link(s): REF3033-Q1 REF3033-Q1 www.ti.com SBVS131 - JANUARY 2010 TYPICAL CHARACTERISTICS (continued) 1-25mA LOAD TRANSIENT (CL = 1F) 0.1Hz TO 10Hz NOISE IL = 25mA 10V/div 20mV/div IL = 1mA VOUT 1.0s/div 100s/div LONG-TERM STABILITY 1000 TO 2000 HOURS LONG-TERM STABILITY 0 TO 1000 HOURS 80 Absolute Output Voltage Drift (ppm) Absolute Output Voltage Drift (ppm) 80 70 60 50 40 30 20 10 0 0 100 200 300 400 500 600 700 800 70 60 50 40 30 20 10 0 1000 1100 1200 1300 1400 1500 1600 1700 1800 1900 2000 900 1000 Time (hours) Time (hours) LONG-TERM STABILITY 0 TO 2000 HOURS Absolute Output Voltage Drift (ppm) 80 70 60 50 40 30 20 10 0 0 200 400 600 800 1000 1200 1400 1600 1800 2000 Time (hours) Submit Documentation Feedback Copyright (c) 2010, Texas Instruments Incorporated Product Folder Link(s): REF3033-Q1 7 REF3033-Q1 SBVS131 - JANUARY 2010 www.ti.com THEORY OF OPERATION The REF30xx is a series, CMOS, precision bandgap voltage reference. Its basic topology is shown in Figure 1. The transistors Q1 and Q2 are biased such that the current density of Q1 is greater than that of Q2. The difference of the two base-emitter voltages, Vbe1 - Vbe2, has a positive temperature coefficient and is forced across resistor R1. This voltage is gained up and added to the base-emitter voltage of Q2, which has a negative coefficient. The resulting output voltage is virtually independent of temperature. The curvature of the bandgap voltage, as seen in the typical curve, "Output Voltage vs Temperature," is due to the slightly nonlinear temperature coefficient of the base-emitter voltage of Q2. R1 + + Vbe1 Vbe2 - Q1 - Q2 Figure 1. Simplified Schematic of Bandgap Reference APPLICATION INFORMATION For normal operation, the REF30xx does not require a capacitor on the output. If a capacitive load is connected, special care must be taken with the combination of low equivalent series resistance (ESR) capacitors and high capacitance. This caution is especially true for low-output voltage devices; therefore, the REF3012 should only have a low-ESR capacitance of 10 F or less. Figure 2 shows the typical connections required for operation of the REF30xx. A supply bypass capacitor of 0.47 F is always recommended. VIN 1 0.47F VOUT REF30xx 3 2 Figure 2. Typical Connections for Operating REF30xx Supply Voltage The REF30xx family of references features an extremely low dropout voltage. With the exception of the REF3012, which has a minimum supply requirement of 1.8 V, the REF30xx can be operated with a supply of only 1 mV above the output voltage in an unloaded condition. For loaded conditions, a typical dropout voltage versus load is shown on the cover page. The REF30xx features a low quiescent current, which is extremely stable over changes in both temperature and supply. The typical room temperature quiescent current is 42 A, and the maximum quiescent current over temperature is just 59 A. Additionally, the quiescent current typically changes less than 2.5 A over the entire supply range, as shown in Figure 3. 8 Submit Documentation Feedback Copyright (c) 2010, Texas Instruments Incorporated Product Folder Link(s): REF3033-Q1 REF3033-Q1 www.ti.com SBVS131 - JANUARY 2010 SUPPLY CURRENT vs INPUT VOLTAGE 42.5 IQ (A) 42.0 41.5 41.0 40.5 40.0 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5 6 VIN (V) Figure 3. Supply Current vs Supply Voltage Supply voltages below the specified levels can cause the REF30xx to momentarily draw currents greater than the typical quiescent current. Using a power supply with a fast rising edge and low output impedance easily prevents this. Thermal Hysteresis Thermal hysteresis for the REF30xx is defined as the change in output voltage after operating the device at 25C, cycling the device through the specified temperature range, and returning to 25C, and can be expressed as: Where VHYST = Calculated hysteresis VPRE = Output voltage measured at 25C pretemperature cycling VPOST = Output voltage measured when device has been operated at 25C, cycled through specified range -40C to 85C, and returned to operation at 25C. Temperature Drift The REF30xx is designed to exhibit minimal drift error, defined as the change in output voltage over varying temperature. Using the "box" method of drift measurement, the REF30xx features a typical drift coefficient of 20 ppm from 0C to 70C--the primary temperature range of use for many applications. For automotive temperature ranges of -40C to 85C, the REF30xx family drift increases to a typical value of 50 ppm. Noise Performance The REF30xx generates noise less than 50 Vp-p between frequencies of 0.1 Hz to 10 Hz, and can be seen in the typical characteristic curve "0.1 to 10Hz Voltage Noise." The noise voltage of the REF30xx increases with output voltage and operating temperature. Additional filtering may be used to improve output noise levels, although care should be taken to ensure the output impedance does not degrade AC performance. Long-Term Stability Long term stability refers to the change of the output voltage of a reference over a period of months or years. This effect lessens as time progresses as is apparent by the long term stability curves. The typical drift value for the REF30xx is 24 ppm from 0 to 1000 hours and 15 ppm from 1000 to 2000 hours. This parameter is characterized by measuring 30 units at regular intervals for a period of 2000 hours. Submit Documentation Feedback Copyright (c) 2010, Texas Instruments Incorporated Product Folder Link(s): REF3033-Q1 9 REF3033-Q1 SBVS131 - JANUARY 2010 www.ti.com Load Regulation Load regulation is defined as the change in output voltage due to changes in load current. Load regulation for the REF30xx is measured using force and sense contacts as pictured in Figure 4. The force and sense lines tied to the contact area of the output pin reduce the impact of contact and trace resistance, resulting in accurate measurement of the load regulation contributed solely by the REF30xx. For applications requiring improved load regulation, force and sense lines should be used. Output Pin Contact and Trace Resistance + VOUT - IL Sense Line Force Line Load Meter Figure 4. Accurate Load Regulation Application Circuits Negative Reference Voltage For applications requiring a negative and positive reference voltage, the OPA703 and REF30xx can be used to provide a dual supply reference from a 5-V supply. Figure 5 shows the REF3025 used to provide a 2.5-V supply reference voltage. The low offset voltage and low drift of the OPA703 complement the low drift performance of the REF30xx to provide an accurate solution for split-supply applications. +5V +2.5V REF3025 10kW 10kW +5V OPA703 -2.5V -5V Figure 5. REF3025 Combined with OPA703 to Create Positive and Negative Reference Voltages 10 Submit Documentation Feedback Copyright (c) 2010, Texas Instruments Incorporated Product Folder Link(s): REF3033-Q1 REF3033-Q1 www.ti.com SBVS131 - JANUARY 2010 Data Acquisition Often data acquisition systems require stable voltage references to maintain necessary accuracy. The REF30xx family features stability and a wide range of voltages suitable for most microcontrollers and data converters. Figure 6 and Figure 7 show two basic data acquisition systems. 3.3V REF3033 V+ GND 5W + 1F to 10F ADS7822 VREF VCC 0.1F VIN +In CS -In DOUT GND VS + 1F to 10F Microcontroller DCLOCK Figure 6. Basic Data Acquisition System 1 2.5V Supply 5W 2.5V + VIN REF3012 1F to 10F ADS8324 VOUT 1.25V VREF VS VCC + 0.1F 1F to 10F GND 0V to 1.25V +In CS -In DOUT GND Microcontroller DCLOCK Figure 7. Basic Data Acquisition System 2 Submit Documentation Feedback Copyright (c) 2010, Texas Instruments Incorporated Product Folder Link(s): REF3033-Q1 11 PACKAGE OPTION ADDENDUM www.ti.com 14-May-2010 PACKAGING INFORMATION Orderable Device Status (1) Package Type Package Drawing REF3033AIDBZRQ1 ACTIVE SOT-23 DBZ Pins Package Eco Plan (2) Qty 3 3000 Green (RoHS & no Sb/Br) Lead/Ball Finish CU NIPDAU MSL Peak Temp (3) Level-2-260C-1 YEAR (1) The marketing status values are defined as follows: ACTIVE: Product device recommended for new designs. LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect. NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design. PREVIEW: Device has been announced but is not in production. Samples may or may not be available. OBSOLETE: TI has discontinued the production of the device. (2) Eco Plan - The planned eco-friendly classification: Pb-Free (RoHS), Pb-Free (RoHS Exempt), or Green (RoHS & no Sb/Br) - please check http://www.ti.com/productcontent for the latest availability information and additional product content details. TBD: The Pb-Free/Green conversion plan has not been defined. Pb-Free (RoHS): TI's terms "Lead-Free" or "Pb-Free" mean semiconductor products that are compatible with the current RoHS requirements for all 6 substances, including the requirement that lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, TI Pb-Free products are suitable for use in specified lead-free processes. Pb-Free (RoHS Exempt): This component has a RoHS exemption for either 1) lead-based flip-chip solder bumps used between the die and package, or 2) lead-based die adhesive used between the die and leadframe. The component is otherwise considered Pb-Free (RoHS compatible) as defined above. Green (RoHS & no Sb/Br): TI defines "Green" to mean Pb-Free (RoHS compatible), and free of Bromine (Br) and Antimony (Sb) based flame retardants (Br or Sb do not exceed 0.1% by weight in homogeneous material) (3) MSL, Peak Temp. -- The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder temperature. Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is provided. TI bases its knowledge and belief on information provided by third parties, and makes no representation or warranty as to the accuracy of such information. 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OTHER QUALIFIED VERSIONS OF REF3033-Q1 : * Catalog: REF3033 NOTE: Qualified Version Definitions: * Catalog - TI's standard catalog product Addendum-Page 1 PACKAGE MATERIALS INFORMATION www.ti.com 20-Jul-2010 TAPE AND REEL INFORMATION *All dimensions are nominal Device REF3033AIDBZRQ1 Package Package Pins Type Drawing SPQ SOT-23 3000 DBZ 3 Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) 179.0 8.4 Pack Materials-Page 1 3.15 B0 (mm) K0 (mm) P1 (mm) 2.95 1.22 4.0 W Pin1 (mm) Quadrant 8.0 Q3 PACKAGE MATERIALS INFORMATION www.ti.com 20-Jul-2010 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) REF3033AIDBZRQ1 SOT-23 DBZ 3 3000 195.0 200.0 45.0 Pack Materials-Page 2 IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, modifications, enhancements, improvements, and other changes to its products and services at any time and to discontinue any product or service without notice. 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