LM236-2.5, LM336-2.5, LM336B-2.5 2.5-V INTEGRATED REFERENCE CIRCUITS SLVS063C – NOVEMBER 1988 – REVISED AUGUST 2000 D D D D D D D D Low Temperature Coefficient Wide Operating Current . . . 400 µA to 10 mA 0.27-Ω Dynamic Impedance ±1% Tolerance Available Specified Temperature Stability Easily Trimmed for Minimum Temperature Drift Fast Turnon Three-Lead Transistor Package D PACKAGE (TOP VIEW) NC NC NC ANODE 1 8 2 7 3 6 4 5 CATHODE NC NC ADJ NC-No internal connection LP PACKAGE (TOP VIEW) description ANODE CATHODE The LM236-2.5, LM336-2.5, and LM336B-2.5 integrated circuits are precision 2.5-V shunt regulator diodes. These reference circuits operate as low-temperature-coefficient 2.5-V zeners with a 0.2-Ω dynamic impedance. A third terminal provided on the circuit allows the reference voltage and temperature coefficient to be trimmed easily. ADJ symbol ANODE CATHODE ADJ The series is useful as precision 2.5-V low-voltage references (VZ) for digital voltmeters, power supplies, or operational-amplifier circuitry. The 2.5-V voltage reference makes it convenient to obtain a stable reference from 5-V logic supplies. Devices in this series operate as shunt regulators, and can be used as either positive or negative voltage references. The LM236-2.5 is characterized for operation from –25°C to 85°C. The LM336-2.5 and LM336B-2.5 are characterized for operation from 0°C to 70°C. AVAILABLE OPTIONS PACKAGED DEVICES TA SMALL OUTLINE (D) 0°C to 70°C –25°C to 85°C PLASTIC (LP) LM336D-2.5 LM336LP-2.5 LM336BD-2.5 LM336BLP-2.5 LM236D-2.5 LM236LP-2.5 The D and LP packages also are available taped and reeled. Add the suffix R to the device type (e.g., LM336DR-2.5). Chip forms are tested at 25°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 2000, Texas Instruments Incorporated PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 1 LM236-2.5, LM336-2.5, LM336B-2.5 2.5-V INTEGRATED REFERENCE CIRCUITS SLVS063C – NOVEMBER 1988 – REVISED AUGUST 2000 schematic diagram CATHODE Q14 Q11 24 kΩ 24 kΩ 6.6 kΩ Q8 Q7 20 pF 10 kΩ Q2 30 pF Q10 Q1 Q4 500 Ω Q9 Q3 30 kΩ Q6 ADJ 6.6 kΩ Q12 Q5 Q13 720 Ω ANODE All component values are nominal absolute maximum ratings over operating free-air temperature range (unless otherwise noted)† Reverse current, IR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 mA Forward current, IF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 mA Package thermal impedance, θJA (see Notes 1 and 2): D package . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97°C/W LP package . . . . . . . . . . . . . . . . . . . . . . . . . . 156°C/W Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds: D or LP package . . . . . . . . . . . . . . . 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. NOTES: 1. Maximum power dissipation is a function of TJ(max), θJA, and TA. The maximum allowable power dissipation at any allowable ambient temperature is PD = (TJ(max) – TA)/θJA. Operating at the absolute maximum TJ of 150°C can impact reliability. 2. The package thermal impedance is calculated in accordance with JESD 51-7. recommended operating conditions LM236-2.5 Operating free free-air air temperature temperature, TA 2 LM336-2.5, LM336B-2.5 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 MIN MAX –25 85 0 70 UNIT °C LM236-2.5, LM336-2.5, LM336B-2.5 2.5-V INTEGRATED REFERENCE CIRCUITS SLVS063C – NOVEMBER 1988 – REVISED AUGUST 2000 electrical characteristics at specified free-air temperature (unless otherwise noted) PARAMETER TA† TEST CONDITIONS LM236, LM336 VZ Reference voltage IZ = 1 mA ∆VZ(∆T) Change in reference voltage with temperature VZ adjusted to 2.490 V, IZ = 1 mA ∆VZ(∆I) Change g in reference voltage with current IZ = 400 µA to 10 mA ∆VZ(∆t) Long-term change in reference voltage IZ = 1 mA zz Reference impedance IZ = 1 mA, mA 25°C LM336B f = 1 kHz LM236-2.5 LM336-2.5 MIN TYP MAX MIN TYP MAX 2.44 2.49 2.54 2.39 2.49 2.59 2.44 2.49 2.54 9 1.8 6 Full range 3.5 25°C 2.6 6 2.6 10 Full range 3 10 3 12 25°C 20 25°C 0.2 0.6 0.2 1 Full range 0.4 1 0.4 1.4 20 UNIT V mV mV ppm/khr W † Full range is –25°C to 85°C for the LM236-2.5 and 0°C to 70°C for the LM336-2.5 and LM336B-2.5. POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 3 LM236-2.5, LM336-2.5, LM336B-2.5 2.5-V INTEGRATED REFERENCE CIRCUITS SLVS063C – NOVEMBER 1988 – REVISED AUGUST 2000 TYPICAL CHARACTERISTICS CHANGE IN REFERENCE VOLTAGE vs REFERENCE CURRENT NOISE VOLTAGE vs FREQUENCY 250 IZ = 1 mA TA = 25°C TA = 25°C 2 Vn – Noise Voltage – nV/ Hz ∆V Z – Change in Reference Voltage – mV 2.5 1.5 1 0.5 0 200 150 100 50 0 2 8 4 6 IZ – Reference Current – mA 10 10 100 Figure 1 Figure 2 REFERENCE IMPEDANCE vs FREQUENCY 100 z z – Reference Impedance – Ω IZ = 1 mA TA = – 55°C to 125°C 10 1 0.1 0.01 0.1 1 10 f – Frequency – kHz Figure 3 4 1k f – Frequency – Hz POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 100 10 k 100 k LM236-2.5, LM336-2.5, LM336B-2.5 2.5-V INTEGRATED REFERENCE CIRCUITS SLVS063C – NOVEMBER 1988 – REVISED AUGUST 2000 APPLICATION INFORMATION 5V 2.49 kΩ 2.5 V IN457 † 5V LM236-2.5 LM336-2.5 LM336B-2.5 2.49 kΩ IN457 † 2.5 V LM236-2.5 LM336-2.5 LM336B-2.5 10 kΩ‡ NC † Any silicon signal diode ‡ Adjust to 2.49 V Figure 5. 2.5-V Reference With Minimum Temperature Coefficient Figure 4. 2.5-V Reference VI = 3.5 – 40 V V+ R LM334 V– 68.1 Ω VO = 2.5 V LM336-2.5 LM336-2.5 LM336B-2.5 NC Figure 6. Wide-Input-Range Reference POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 5 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