TL461 PRECISION SERIES REFERENCE SLVS263 – NOVEMBER 1999 D D D D D D Low Drift . . . 30 ppm/°C (max) 0.5% Output-Voltage Tolerance Low Quiescent Current . . . 180 µA (max) Shutdown Feature Standby Current . . . –50 µA (max) Packaged In Plastic SOT-23 Package DBV PACKAGE (TOP VIEW) " NC GND ENABLE 1 5 OUTPUT 4 INPUT 2 3 description The TL461 is a precision series voltage reference with a very low temperature drift of 30 ppm/°C, and an output voltage tolerance of 0.5%. The TL461 offers a power-saving advantage over three-terminal precision shunt regulators and voltage references that must conduct the full-load current when operated in the reverse-breakdown region. In addition, the shutdown feature of the device provides low standby current. This device is ideal for use with handheld and battery-operated equipment, switching power supplies, dc-dc converters, A/D and D/A converters, and in low-power precision regulator applications. PRODUCT PREVIEW The TL461 device is characterized for operation from – 40°C to 85°C. 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. Copyright 1999, Texas Instruments Incorporated PRODUCT PREVIEW information concerns products in the formative or design phase of development. Characteristic data and other specifications are design goals. Texas Instruments reserves the right to change or discontinue these products without notice. POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 1 TL461 PRECISION SERIES REFERENCE SLVS263 – NOVEMBER 1999 absolute maximum ratings over operating free-air temperature range (unless otherwise noted)† Input voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 V Package thermal impedance, θJA (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 347°C/W Operating virtual junction temperature range, TJ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0°C to 150°C Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 260°C Storage temperature range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 65°C to 150°C † Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. NOTE 1: Package thermal impedance is calculated in accordance with JESD 51. recommended operating conditions MIN Input In ut voltage voltage, VI TL461-33 4.7 TL461-05 6.4 Output current, IO PRODUCT PREVIEW Operating free-air temperature range, TA Operating virtual-junction temperature range, TJ 2 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 MAX UNIT V 20 mA – 40 85 °C 0 125 °C TL461 PRECISION SERIES REFERENCE SLVS263 – NOVEMBER 1999 electrical characteristics at 25°C free-air temperature, Vin = Vout + 2.5 V, Iout = 0 (unless otherwise noted) TA 25°C MIN TYP MAX TL461-33 TEST CONDITIONS 3.284 3.3 3.317 TL461-05 25°C 4.975 5 5.025 –40°C to 85°C 10 30 25°C 3.1 6.3 VO Output voltage αV out Output voltage temperature coefficient (see Note 2) Tmin < Tj < Tmax nVO Line regulation 7 5 V < Viin < 20 V 7.5 Ioutt = 100 µA nVO Load regulation sourcing Ioutt = 10 mA Ioutt = 20 mA Dropout voltage IO –40°C to 85°C 25°C 8.1 2.2 3 14 27 –40°C to 85°C 25°C 35 22 –40°C to 85°C –40°C to 85°C Reverse leakage Vin = –15 V –40°C to 85°C 0.5 10 25°C 125 180 1.4 40 –40°C to 85°C Standby current ENABLE bias current c rrent ENABLE = 2 V –40°C 40°C to 85°C 0.1 Hz < f < 10 Hz Output noise voltage (see Note 3) 10 Hz < f < 1 kHz Long-term stability of output voltage (see Note 4) 50 7 0.05 20 25°C 20 25°C mV V mA 225 –40°C to 85°C ENABLE = 0.8 V mV 50 Iout = 10 mA Vout = GND Quiescent current ppm/°C 40 Output current 25°C V 4 –40°C to 85°C 25°C UNIT 70 PRODUCT PREVIEW PARAMETER µA µA µA µA µVpp µVrms ppm/√k Hz NOTES: 2. Temperature coefficient is measured by dividing the change in output voltage by the specified temperature range. Ťa ǒ Ǔ Ť ǒ Ǔ+ Maximum Vout DVout Vout ppm °C V out at 25°C 10 ∆Vout 6 DTA Minimum Vout ∆TA Where: ∆TA is the recommended operating free-air temperature range of the device. aV can be positive or negative, depending on whether minimum Vout or maximum Vout, respectively, out occurs at the lower temperature. 3. Peak-to-peak noise is measured with a single high-pass filter at 0.1 Hz and two-pole low-pass filter at 10 Hz. The unit is enclosed in a still-air environment to eliminate thermocouple effects on the leads. The test time is 10 seconds. RMS noise is measured with a single high-pass filter at 10 Hz and a two-pole low-pass filter at 1 kHz. The resulting output is full-wave rectified, then integrated for a fixed period, making the final reading an average rather than RMS. A correction factor of 1.1 converts from average to RMS. A second correction of 0.88 corrects for the nonideal bandpass of the filters. 4. Long-term stability typically has a logarithmic characteristic. Therefore, stability changes after 1000 hours tend to be much smaller than before that time. Total drift in the second thousand hours is normally less than one third of that of the first thousand hours, with a continuing trend toward reduced drift with time. Significant improvement in long-term drift can be realized by preconditioning the device with a 100-hour to 200-hour, 125°C burn-in. Long-term stability also is affected by differential stresses between the device and the board material that are created during board assembly. POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 3 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 acknowledgement, 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. 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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 1999, Texas Instruments Incorporated