REF3033AIDBZRQ1

Not Recommended For New Designs REF3033-Q1 www.ti.com SBVS131 – JANUARY 2010 50 ppm/°C MAX, 50 μA, 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 μA (Max) Excellent Specified Drift Performance – 50 ppm/°C (Max), TA = 0°C to 70°C – 75 ppm/°C (Max), TA = –40°C to 85°C 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 μA 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 –40°C to 85°C. ORDERING INFORMATION (1) PACKAGE (2) TA –40°C to 85°C (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 © 2010, Texas Instruments Incorporated Not Recommended For New Designs 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 = –40°C to 85°C. TA = 25°C, 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 μVPP Voltage noise f = 10 Hz to 10 kHz 105 μVrms VREF + 50 mV ≤ VIN ≤ 5.5 V 130 400 μV/V LINE REGULATION OUTPUT VOLTAGE TEMPERATURE DRIFT (1) dVOUT/dT 0°C ≤ TA ≤ 70°C 20 50 ppm/°C –30°C ≤ TA ≤ 85°C 28 60 ppm/°C –40°C ≤ TA ≤ 85°C 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 μV/mA dT 25 100 ppm 1 50 mV ISC 45 mA 120 μs 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 μF 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 © 2010, Texas Instruments Incorporated Product Folder Link(s): REF3033-Q1 Not Recommended For New Designs REF3033-Q1 www.ti.com SBVS131 – JANUARY 2010 ELECTRICAL CHARACTERISTICS (continued) Boldface limits apply over the specified temperature range, TA = –40°C to 85°C. TA = 25°C, ILOAD = 0, VIN = 5 V (unless otherwise noted) PARAMETER CONDITIONS MIN ILOAD = 0 (4) –40°C ≤ TA ≤ 85°C TYP MAX UNIT VREF + 0.001 5.5 V VREF + 0.05 5.5 POWER SUPPLY Supply voltage VS Over temperature Quiescent current 42 –40°C ≤ TA ≤ 85°C Over temperature 50 μA 59 μA TEMPERATURE RANGE Specified range –40 85 °C Operating range –40 85 °C Thermal resistance (4) Junction to case θJC 110 °C/W Junction to free air θJA 336 °C/W For ILOAD > 0, see Typical Characteristics. Submit Documentation Feedback Copyright © 2010, Texas Instruments Incorporated Product Folder Link(s): REF3033-Q1 3 Not Recommended For New Designs REF3033-Q1 SBVS131 – JANUARY 2010 www.ti.com TYPICAL CHARACTERISTICS TEMPERATURE DRIFT (–40°C to +125°C) 50 100 45 90 40 80 35 70 Number of Units Number of Units TEMPERATURE DRIFT (0°C to +70°C) 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 2.490 30 25 20 15 10 5 –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 (µA) Load Regulation (µV/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 © 2010, Texas Instruments Incorporated Product Folder Link(s): REF3033-Q1 Not Recommended For New Designs 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 (µV/V) 200 100 50 0 –50 10 1 0.1 0.01 –40 –20 0 20 40 80 60 100 120 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 © 2010, Texas Instruments Incorporated Product Folder Link(s): REF3033-Q1 5 Not Recommended For New Designs 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 40µs/div 10µs/div LINE TRANSIENT RESPONSE 0-1mA LOAD TRANSIENT (CL = 0) VIN IL = 0mA 20mV/div 50mV/div 500mV/div IL = 1mA VOUT VOUT 10µs/div 10µs/div 0-5mA LOAD TRANSIENT (CL = 0) 1-6mA LOAD TRANSIENT (CL =1µF) IL = 5mA IL = 6mA 20mV/div 20mV/div IL = 0mA VOUT VOUT 10µs/div 6 IL = 0mA 40µs/div Submit Documentation Feedback Copyright © 2010, Texas Instruments Incorporated Product Folder Link(s): REF3033-Q1 Not Recommended For New Designs REF3033-Q1 www.ti.com SBVS131 – JANUARY 2010 TYPICAL CHARACTERISTICS (continued) 1-25mA LOAD TRANSIENT (CL = 1µF) 0.1Hz TO 10Hz NOISE IL = 25mA 10µV/div 20mV/div IL = 1mA VOUT 1.0s/div 100µs/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 © 2010, Texas Instruments Incorporated Product Folder Link(s): REF3033-Q1 7 Not Recommended For New Designs 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 μF or less. Figure 2 shows the typical connections required for operation of the REF30xx. A supply bypass capacitor of 0.47 μF is always recommended. VIN 1 0.47µF 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 μA, and the maximum quiescent current over temperature is just 59 μA. Additionally, the quiescent current typically changes less than 2.5 μA over the entire supply range, as shown in Figure 3. 8 Submit Documentation Feedback Copyright © 2010, Texas Instruments Incorporated Product Folder Link(s): REF3033-Q1 Not Recommended For New Designs REF3033-Q1 www.ti.com SBVS131 – JANUARY 2010 SUPPLY CURRENT vs INPUT VOLTAGE 42.5 IQ (µA) 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 25°C, cycling the device through the specified temperature range, and returning to 25°C, and can be expressed as: Where VHYST = Calculated hysteresis VPRE = Output voltage measured at 25°C pretemperature cycling VPOST = Output voltage measured when device has been operated at 25°C, cycled through specified range –40°C to 85°C, and returned to operation at 25°C. 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 0°C to 70°C—the primary temperature range of use for many applications. For automotive temperature ranges of –40°C to 85°C, the REF30xx family drift increases to a typical value of 50 ppm. Noise Performance The REF30xx generates noise less than 50 μVp-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 © 2010, Texas Instruments Incorporated Product Folder Link(s): REF3033-Q1 9 Not Recommended For New Designs 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 © 2010, Texas Instruments Incorporated Product Folder Link(s): REF3033-Q1 Not Recommended For New Designs 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 + 1µF to 10µF ADS7822 VREF VCC 0.1µF VIN +In CS –In DOUT GND VS + 1µF to 10µF Microcontroller DCLOCK Figure 6. Basic Data Acquisition System 1 2.5V Supply 5W 2.5V + VIN REF3012 1µF to 10µF ADS8324 VOUT 1.25V VREF VS VCC + 0.1µF 1µF to 10µF GND 0V to 1.25V +In CS –In DOUT GND Microcontroller DCLOCK Figure 7. Basic Data Acquisition System 2 Submit Documentation Feedback Copyright © 2010, Texas Instruments Incorporated Product Folder Link(s): REF3033-Q1 11 PACKAGE OPTION ADDENDUM www.ti.com 10-Dec-2020 PACKAGING INFORMATION Orderable Device Status (1) Package Type Package Pins Package Drawing Qty Eco Plan (2) Lead finish/ Ball material MSL Peak Temp Op Temp (°C) Device Marking (3) (4/5) (6) REF3033AIDBZRQ1 NRND SOT-23 DBZ 3 3000 RoHS & Green NIPDAU Level-2-260C-1 YEAR -40 to 85 REFI (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) RoHS: TI defines "RoHS" to mean semiconductor products that are compliant with the current EU RoHS requirements for all 10 RoHS substances, including the requirement that RoHS substance do not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, "RoHS" products are suitable for use in specified lead-free processes. TI may reference these types of products as "Pb-Free". RoHS Exempt: TI defines "RoHS Exempt" to mean products that contain lead but are compliant with EU RoHS pursuant to a specific EU RoHS exemption. Green: TI defines "Green" to mean the content of Chlorine (Cl) and Bromine (Br) based flame retardants meet JS709B low halogen requirements of