LM143,LM343 LM143/LM343 High Voltage Operational Amplifier Literature Number: SNVS759 General Description Features The LM143 is a general purpose high voltage operational amplifier featuring operation to 40V, complete input overvoltage protection up to 40V and input currents comparable to those of other super- op amps. Increased slew rate, together with higher common-mode and supply rejection, insure improved performance at high supply voltages. Operating characteristics, in particular supply current, slew rate and gain, are virtually independent of supply voltage and temperature. Furthermore, gain is unaffected by output loading at high supply voltages due to thermal symmetry on the die. The LM143 is pin compatible with general purpose op amps and has offset null capability. Application areas include those of general purpose op amps, but can be extended to higher voltages and higher output power when externally boosted. For example, when used in audio power applications, the LM143 provides a power bandwidth that covers the entire audio spectrum. In addition, the LM143 can be reliably operated in environments with large overvoltage spikes on the power supplies, where other internally-compensated op amps would suffer catastrophic failure. The LM343 is similar to the LM143 for applications in less severe supply voltage and temperature environments. n n n n n Wide supply voltage range: 4.0V to 40V Large output voltage swing: 37V Wide input common-mode range: 38V Input overvoltage protection: Full 40V Supply current is virtually independent of supply voltage and temperature Unique Characteristics n Low input bias current: 8.0 nA n Low input offset current: 1.0 nA n High slew rate -- essentially independent of temperature and supply voltage: 2.5V/s n High voltage gain -- virtually independent of resistive loading, temperature, and supply voltage: 100k min n Internally compensated for unity gain n Output short circuit protection n Pin compatible with general purpose op amps LM143/LM343 LM143/LM343 High Voltage Operational Amplifier LM143/LM343 High Voltage Operational Amplifier July 1992 Connection Diagram Metal Can Package Top View DS007783-1 *Available per SMD# 7800303 Order Number LM143H, LM143H/883* or LM343H See NS Package Number H08C (c) 1998 National Semiconductor Corporation www.national.com DS007783 PrintDate=1998/05/21 PrintTime=11:17:12 41268 ds007783 Rev. No. 3 cmserv Proof 1 1 Absolute Maximum Ratings (Notes 1, 4) If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. LM143 Supply Voltage Power Dissipation (Note 1) 34V 680 mW 680 mW Differential Input Voltage (Note 2) Input Voltage (Note 2) LM343 40V 80V 68V 40V 34V Operating Temperature Range -55C to +125C 0C to +70C Storage Temperature Range -65C to +150C -65C to +150C Output Short Circuit Duration 5 seconds 5 seconds 300C 300C Lead Temperature (Soldering, 10 sec.) ESD rating to be determined. Electrical Characteristics (Note 3) Parameter Conditions LM143 Min LM343 Typ Max 2.0 1.0 Input Bias Current TA = 25C TA = 25C TA = 25C Supply Voltage TA = 25C Input Offset Voltage Input Offset Current Min Units Typ Max 5.0 2.0 8.0 mV 3.0 1.0 10 nA 8.0 20 8.0 40 nA 10 100 10 200 V/V Rejection Ratio Output Voltage Swing Large Signal Voltage Gain Common-Mode TA = 25C, RL 5 k TA = 25C, VOUT = 10V, 22 25 20 25 V 100k 180k 70k 180k V/V 80 90 70 90 dB 24 26 22 26 RL 100 k TA = 25C Rejection Ratio Input Voltage Range Supply Current (Note 5) Short Circuit Current Slew Rate Power Bandwidth Unity Gain Frequency Input Offset Voltage Input Offset Current Input Bias Current Large Signal Voltage Gain Output Voltage Swing TA = 25C TA = 25C TA = 25C TA = 25C, AV = 1 TA = 25C, VOUT = 40 Vp-p, RL = 5 k, THD 1% 2.0 4.0 2.0 V 5.0 mA 20 20 mA 2.5 2.5 V/s 20k 20k Hz TA = 25C TA = Max TA = Min TA = Max 1.0M 0.8 4.5 0.8 14 TA = Min TA = Max TA = Min 1.8 7.0 1.8 14 5.0 35 5.0 55 16 35 16 55 1.0M 6.0 Hz 10 6.0 mV 10 RL 100 k, TA = Max RL 100 k, TA = Min RL 5.0 k, TA = Max 50k 150k 50k 150k 50k 220k 50k 220k 22 26 20 26 RL 5.0 k, TA = Min 22 25 20 25 nA nA V/V V Note 1: Absolute maximum ratings are not necessarily concurrent, and care must be taken not to exceed the maximum junction temperature of the LM143 (150C) or the LM343 (100C). For operating at elevated temperatures, devices in the H08 package must be derated based on a thermal resistance of 155C/W, junction to ambient, or 20C/W, junction to case. Note 2: For supply voltage less than 40V for the LM143 and less than 34V for the LM343, the absolute maximum input voltage is equal to the supply voltage. Note 3: These specifications apply for VS = 28V. For LM143, TA = max = 125C and TA = min = -55C. For LM343, TA = max = 70C and TA = min = 0C. Note 4: Refer to RETS143X for LM143H and LM1536H military specifications. Note 5: The maximum supply currents are guaranteed at VS = 40V for the LM143 and VS = 34V for the LM343. www.national.com 2 PrintDate=1998/05/21 PrintTime=11:17:12 41268 ds007783 Rev. No. 3 cmserv Proof 2 DS007783-2 Schematic Diagram 3 PrintDate=1998/05/21 PrintTime=11:17:12 41268 ds007783 Rev. No. 3 www.national.com cmserv Proof 3 Typical Performance Characteristics Voltage Follower Slew Rate Supply Current Short Circuit Current DS007783-15 Unity Gain Bandwidth DS007783-16 Input Noise Voltage Input Noise Current DS007783-18 Common-Mode Rejection DS007783-17 DS007783-20 DS007783-19 Power Supply Rejection DS007783-21 Large Signal Frequency Response DS007783-35 DS007783-22 www.national.com 4 PrintDate=1998/05/21 PrintTime=11:17:13 41268 ds007783 Rev. No. 3 cmserv Proof 4 Typical Performance Characteristics Open Loop Frequency Response (Continued) Voltage Follower Pulse Response Inverter Pulse Response DS007783-25 DS007783-23 Input Voltage Range DS007783-24 Output Voltage Swing DS007783-27 DS007783-26 Supply Current Voltage Gain Voltage Gain Input Current DS007783-29 Application Hints DS007783-28 DS007783-31 DS007783-30 bination of high ambient temperature, high supply voltages, and high power dissipation which results in excessive die temperature. This is also true when driving low impedance or reactive loads or loads that can revert to low impedance; for example, the LM143 can drive most general purpose op amps outside of the maximum input voltage range, causing heavy current to flow and possibly destroying both devices. (See AN-127) The LM143 is designed for trouble free operation at any supply voltage up to and including the guaranteed maximum of 40V. Input overvoltage protection, both common-mode and differential, is 100% tested and guaranteed at the maximum supply voltage. Furthermore, all possible high voltage destructive modes during supply voltage turn-on have been eliminated by design. As with most IC op amps, however, certain precautions should be observed to insure that the LM143 remains virtually blow-out proof. Precautions should be taken to insure that the power supplies never become reversed in polarity -- even under transient conditions. With reverse voltage, the IC will conduct excessive current, fusing the internal aluminum interconnects. Voltage reversal between the power supplies will almost always result in a destroyed unit. Although output short circuits to ground or either supply can be sustained indefinitely at lower supply voltages, these short circuits should be of limited duration when operating at higher supply voltages. Units can be destroyed by any com5 PrintDate=1998/05/21 PrintTime=11:17:13 41268 ds007783 Rev. No. 3 www.national.com cmserv Proof 5 Application Hints (See AN-127) (Continued) In high voltage applications which are sensitive to very low input currents, special precautions should be exercised. For example, with high source resistances, care should be taken to prevent the magnitude of the PC board leakage currents, although quite small, from approaching those of the op amp input currents. These leakage currents become larger at 125C and are made worse by high supply voltages. To prevent this, PC boards should be properly cleaned and coated to prevent contamination and to provide protection from condensed water vapor when operating below 0C. A guard ring is also recommended to significantly reduce leakage currents from the op amp input pins to the adjacent high voltage pins in the standard op amp pin connection as shown in Figure 1. Figures 2, 3, 4 show how the guard ring is connected for the three most common op amp configurations. DS007783-7 FIGURE 3. Guarded Non-Inverting Amplifier Finally, caution should be exercised in high voltage applications as electrical shock hazards are present. Since the negative supply is connected to the case, users may inadvertantly contact voltages equal to those across the power supplies. The LM143 can be used as a plug-in replacement in most general purpose op amp applications. The circuits presented in the following section emphasize those applications which take advantage of the unique high voltage abilities of the LM143. DS007783-8 FIGURE 4. Guarded Inverting Amplifier DS007783-5 Bottom View FIGURE 1. Printed Circuit Layout for Input Guarding with TO-5 Package DS007783-14 FIGURE 5. Offset Voltage Adjustment DS007783-6 R1 = RSOURCE FIGURE 2. Guarded Voltage Follower www.national.com 6 PrintDate=1998/05/21 PrintTime=11:17:13 41268 ds007783 Rev. No. 3 cmserv Proof 6 Typical Applications (Note 6) (For more detail see AN-127) 130 Vp-p Drive Across a Floating Load DS007783-9 34V Common-Mode Instrumentation Amplifier DS007783-10 * R2 may be adjustable to trim the gain. ** R7 may be adjusted to compensate for the resistance tolerance of R4-R7 for best CMR. Note 6: The 38V supplies allow for a 5% voltage tolerance. All resistors are 12 watt, except as noted. 7 PrintDate=1998/05/21 PrintTime=11:17:13 41268 ds007783 Rev. No. 3 www.national.com cmserv Proof 7 Typical Applications (Note 6) (For more detail see AN-127) (Continued) Tracking 65V, 1 Amp Power Supply with Short Circuit Protection DS007783-11 Put on common heat sink. All resistors are 12 watt, 5%, except as noted. www.national.com 8 PrintDate=1998/05/21 PrintTime=11:17:13 41268 ds007783 Rev. No. 3 cmserv Proof 8 Typical Applications (Note 6) (For more detail see AN-127) (Continued) 90W Audio Power Amplifier with Safe Area Protection DS007783-12 Put on common heat sink * 34 turns of no. 20 wire on a 38" form ** Adjust R6 to set IQ = 100 mA Book Extract End 9 PrintDate=1998/05/21 PrintTime=11:17:13 41268 ds007783 Rev. No. 3 www.national.com cmserv Proof 9 Typical Applications (Note 6) (For more detail see AN-127) (Continued) Book Extract End 1 Amp Power Amplifier with Short Circuit Protection DS007783-13 www.national.com 10 PrintDate=1998/05/21 PrintTime=11:17:13 41268 ds007783 Rev. No. 3 cmserv Proof 10 THIS PAGE IS IGNORED IN THE DATABOOK 11 PrintDate=1998/05/21 PrintTime=11:17:13 41268 ds007783 Rev. No. 3 11 cmserv Proof 11 LM143/LM343 High Voltage Operational Amplifier Physical Dimensions inches (millimeters) unless otherwise noted Metal Can Package (H) Order Number LM143H, LM143H/883 or LM343H NS Package Number H08C LIFE SUPPORT POLICY NATIONAL'S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF NATIONAL SEMICONDUCTOR CORPORATION. As used herein: 2. A critical component in any component of a life support 1. Life support devices or systems are devices or sysdevice or system whose failure to perform can be reatems which, (a) are intended for surgical implant into sonably expected to cause the failure of the life support the body, or (b) support or sustain life, and whose faildevice or system, or to affect its safety or effectiveness. ure to perform when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a significant injury to the user. National Semiconductor Corporation Americas Tel: 1-800-272-9959 Fax: 1-800-737-7018 Email: support@nsc.com www.national.com National Semiconductor Europe Fax: +49 (0) 1 80-530 85 86 Email: europe.support@nsc.com Deutsch Tel: +49 (0) 1 80-530 85 85 English Tel: +49 (0) 1 80-532 78 32 Francais Tel: +49 (0) 1 80-532 93 58 Italiano Tel: +49 (0) 1 80-534 16 80 National Semiconductor Asia Pacific Customer Response Group Tel: 65-2544466 Fax: 65-2504466 Email: sea.support@nsc.com National Semiconductor Japan Ltd. Tel: 81-3-5620-6175 Fax: 81-3-5620-6179 National does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and National reserves the right at any time without notice to change said circuitry and specifications. PrintDate=1998/05/21 PrintTime=11:17:13 41268 ds007783 Rev. No. 3 cmserv Proof 12 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. Customers should obtain the latest relevant information before placing orders and should verify that such information is current and complete. All products are sold subject to TI's terms and conditions of sale supplied at the time of order acknowledgment. TI warrants performance of its hardware products to the specifications applicable at the time of sale in accordance with TI's standard warranty. Testing and other quality control techniques are used to the extent TI deems necessary to support this warranty. Except where mandated by government requirements, testing of all parameters of each product is not necessarily performed. TI assumes no liability for applications assistance or customer product design. Customers are responsible for their products and applications using TI components. To minimize the risks associated with customer products and applications, customers should provide adequate design and operating safeguards. TI does not warrant or represent that any license, either express or implied, is granted under any TI patent right, copyright, mask work right, or other TI intellectual property right relating to any combination, machine, or process in which TI products or services are used. Information published by TI regarding third-party products or services does not constitute a license from TI to use such products or services or a warranty or endorsement thereof. Use of such information may require a license from a third party under the patents or other intellectual property of the third party, or a license from TI under the patents or other intellectual property of TI. Reproduction of TI information in TI data books or data sheets is permissible only if reproduction is without alteration and is accompanied by all associated warranties, conditions, limitations, and notices. Reproduction of this information with alteration is an unfair and deceptive business practice. TI is not responsible or liable for such altered documentation. Information of third parties may be subject to additional restrictions. Resale of TI products or services with statements different from or beyond the parameters stated by TI for that product or service voids all express and any implied warranties for the associated TI product or service and is an unfair and deceptive business practice. TI is not responsible or liable for any such statements. TI products are not authorized for use in safety-critical applications (such as life support) where a failure of the TI product would reasonably be expected to cause severe personal injury or death, unless officers of the parties have executed an agreement specifically governing such use. Buyers represent that they have all necessary expertise in the safety and regulatory ramifications of their applications, and acknowledge and agree that they are solely responsible for all legal, regulatory and safety-related requirements concerning their products and any use of TI products in such safety-critical applications, notwithstanding any applications-related information or support that may be provided by TI. Further, Buyers must fully indemnify TI and its representatives against any damages arising out of the use of TI products in such safety-critical applications. TI products are neither designed nor intended for use in military/aerospace applications or environments unless the TI products are specifically designated by TI as military-grade or "enhanced plastic." Only products designated by TI as military-grade meet military specifications. Buyers acknowledge and agree that any such use of TI products which TI has not designated as military-grade is solely at the Buyer's risk, and that they are solely responsible for compliance with all legal and regulatory requirements in connection with such use. TI products are neither designed nor intended for use in automotive applications or environments unless the specific TI products are designated by TI as compliant with ISO/TS 16949 requirements. Buyers acknowledge and agree that, if they use any non-designated products in automotive applications, TI will not be responsible for any failure to meet such requirements. Following are URLs where you can obtain information on other Texas Instruments products and application solutions: Products Applications Audio www.ti.com/audio Communications and Telecom www.ti.com/communications Amplifiers amplifier.ti.com Computers and Peripherals www.ti.com/computers Data Converters dataconverter.ti.com Consumer Electronics www.ti.com/consumer-apps DLP(R) Products www.dlp.com Energy and Lighting www.ti.com/energy DSP dsp.ti.com Industrial www.ti.com/industrial Clocks and Timers www.ti.com/clocks Medical www.ti.com/medical Interface interface.ti.com Security www.ti.com/security Logic logic.ti.com Space, Avionics and Defense www.ti.com/space-avionics-defense Power Mgmt power.ti.com Transportation and Automotive www.ti.com/automotive Microcontrollers microcontroller.ti.com Video and Imaging RFID www.ti-rfid.com OMAP Mobile Processors www.ti.com/omap Wireless Connectivity www.ti.com/wirelessconnectivity TI E2E Community Home Page www.ti.com/video e2e.ti.com Mailing Address: Texas Instruments, Post Office Box 655303, Dallas, Texas 75265 Copyright (c) 2011, Texas Instruments Incorporated