LM4005 LM4005C 150 MHz Video Line Driver General Description The LM4005 LM4005C are general purpose unity gain buffers featuring 150 MHz b3 db bandwidth and 4 ns small signal rise time These buffers are capable of delivering a g100 ma current to a resistive load and are oscillation free into capacitive loads The extremely fast slew rate of 1500 V ms wide bandwidth and high output drive make the LM4005 LM4005C ideal choices for closed loop buffer applications with wide band op amps These same characteristics and excellent DC performance make the LM4005 LM4005C excellent choices for open loop applications such as driving coaxial and twisted pair cables The LM4005 is specified for operation over the b55 C to a125 C military temperature range and is available in the 8-lead TO-99 hermetic package The LM4005C is specified for operation over the b25 C toa85 C temperature range and is available in 8-lead plastic mini-dip package Schematic and Connection Diagrams Features Wide bandwidth 150 MHz High slew rate 1500 V ms 100 ma continuous output current guaranteed LM4005CN is pin compatible with HA3-5033-5 and EL2033CN Wide supply voltage range g5v to g20v Applications Coaxial cable driver Flash A D converter driver Video DAC buffer Op amp booster September 1991 LM4005 LM4005C150 MHz Video Line Driver Metal Can Package TL K 10741 1 LM4005H Order Number LM4005H or LM4005CH See NS Package Number H08D Plastic DIP Package TL K 10741 3 TL K 10741 2 LM4005CN Order Number LM4005CN See NS Package Number N08E Unused pins C1995 National Semiconductor Corporation TL K 10741 RRD-B30M115 Printed in U S A
Absolute Maximum Ratings (Note 5) If Military Aerospace specified devices are required please contact the National Semiconductor Sales Office Distributors for availability and specifications Supply Voltage g22v or 44V Input Voltage gv S Storage Temperature Range b65 Ctoa150 C Power Dissipation (Note 7) Junction Temperature LM4005H a175 C LM4005N a150 C Steady State Output Current g100 ma Pulsed Output Current (50 ms on 1 Sec Off) g400 ma Electrical Characteristics (Note 1) Lead Temperature (Soldering 10 sec ) Metal Can Plastic ESD Rating Operating Ratings (Note 5) Temperature Range LM4005H LM4005N Thermal Resistance (Note 6) i JA (H Package) i JC (H Package) i JA (N Package) 300 C 260 C 2 kv b55 Ctoa125 C b25 Ctoa85 C 125 C W 75 C W 120 C W Symbol Parameter Conditions Min Typ Max Units V OS Output Offset Voltge V IN e 0 R L e % g10 g30 mv I IN Input Current V IN e 0 R L e % g5 g10 ma R IN Input Resistance V IN e g1v R L e 100X T A e 25 C 0 2 0 5 MX AV 1 Voltage Gain V IN e g12v R L e 1kX 0 95 0 97 V V AV 2 Voltage Gain V IN e g6v R L e 50X 0 80 0 90 V V AV 3 Voltage Gain with V S e g5v V IN e g3v R L e 50X 0 79 0 89 V V VO 1 Output Voltage Swing V IN e g14v R L e 1kX g12 5 g13 5 V VO 2 Output Voltage Swing V IN e g12v R L e 100X g10 g11 5 V R OUT Output Resistance V IN e g1v R L e 50X 5 10 X I OUT Output Current V IN e g12v T A e 25 C 100 130 ma I S Supply Current V IN e 0 R L e % 10 15 ma PSSR Power Supply Rejection V IN e 0 R L e % Ratio (Note 2) T A e 25 C 60 80 db SR1 Slew Rate (Note 3) V IN e g10v R L e 1kX 1500 V ms SR2 Slew Rate (Note 4) V IN e g5v R L e 50X 600 V ms SSBW Small Signal Bandwidth 150 MHz FPBW Full Power Bandwidth 40 MHz THD Harmonic Distortion V IN e 5V rms fe1 khz 0 1 % Differential Phase Error 0 1 Differential Gain Error 0 1 % Note 1 Specifications apply for V S e g15v R L e 50X and over Operating Temperature Range unless otherwise noted Electrical tests are performed with high speed automated test equipment so that T J e T A unless otherwise noted Note 2 V S e g4 5V to g18v Note 3 Slew rate is measured between V OUT ea5v and b5v Note 4 Slew rate is measured between V OUT ea2 5V and b2 5V Note 5 Absolute Maximum Ratings indicate limits beyond which damage to the device may occur Operating Ratings indicate conditions for which the device is intended to be functional but do not guarantee specific performance limits For guaranteed specifications and test conditions see the Electrical Characteristics The guaranteed specifications apply only for the test conditions listed Note 6 For operating at elevated temperatures the device must be derated based on the thermal resistance i JA and T J Max T J e T A a P D i JA Note 7 The maximum power dissipation is a function of maximum junction temperature T J Max total thermal resistance i JA and ambient temperature T A The maximum allowable power dissipation at any ambient temperature is P D e (T J Max b T A ) i JA 2
Typical Performance Characteristics Small Signal Gain and Phase vs Frequency Input Impedance (Magnitude Phase) Supply Current Positive Pulse Negative Pulse Input Bias Current TL K 10741 4 3
Typical Applications High Current Operational Amplifier Line Driver TL K 10741 6 TL K 10741 5 Applications Information The LM4005 LM4005C are hybrid open loop buffers with high slew rate and bandwidth This makes them useful for video frequencies and above SUPPL VOLTAGES The LM4005 can be operated with a difference in voltage supplies (Va to Vb) of 44V max The supplies do not have to be symmetrical to ground The power supply pins need to be decoupled with 0 1 mf capacitors close to the pins ( inch) and an additional 10 mf capacitor is recommended to decouple power supply ripple This capacitor can be located further from the device (1 inch) The LM4005H and LM4005CH are in metal cans and are pin compatible with the LH0002H and LH0002CH They have the collectors of the output transistors pinned out separately The output stage can therefore be operated from a lower supply voltage and the power dissipation is then reduced However when the signal level exceeds the output supply voltages clipping occurs and the output transistors also require several ms to come out of saturation INPUT The input of the LM4005 can be approximated with a high resistance typical 700 kx in parallel with a small capacitor of about 6 pf Source impedance usually does not cause problems but sometimes an inductive source impedance or an unterminated cable can cause instabilities and in this case a resistance of 100X in series with the input of the buffer may be needed CURRENT LIMITING In order to optimize the performance of the device there is no current limiting built in However on the metal can part current limiting can be obtained by inserting series resistors into the output supply lines as shown in Figure 1 Care has to be taken that the high frequency bypass capacitors are placed close to the pins of the buffer while the 10 mf capacitors are placed on the power supply side of the protection resistors This arrangement has the additional advantage to reduce the power dissipation of the device but it also limits the output voltage swing especially for high output currents (low load resistors) and for low frequencies where the 0 1 mf cannot store the necessary charge When the output is shorted the input to output voltage differential may exceed the emitter to base breakdown of the input transistors This can cause degradation or destruction of the device This voltage differential should not exceed g5v If there is concern in this regard back to back 4V zener diodes from input to output will provide protection Figure 2 shows current limiting done with the LM7001 Detailed information is available in the LM7001 datasheet LOADS The LM4005 is stable for capacitive loads but care has to be taken that the current handling capability of the device is not exceeded I max l I e C load c dv dt or I max l I e V peak c 2 c 3 14 c f When driving inductive loads it may be necessary to use clamp diodes in the output to prevent inductive kickback from damaging the device 4
Applications Information (Continued) TL K 10741 7 FIGURE 1 Current Limiting Using Resistors R S TL K 10741 8 FIGURE 2 Current Limiting Using the LH7001 Physical Dimensions inches (millimeters) Metal Can Package Order Number LM4005H or LM4005CH NS Package Number H08D 5
LM4005 LM4005C150 MHz Video Line Driver Physical Dimensions inches (millimeters) (Continued) Plastic DIP Package Order Number LM4005CN NS Package Number N08E LIFE SUPPORT POLIC NATIONAL S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF NATIONAL SEMICONDUCTOR CORPORATION As used herein 1 Life support devices or systems are devices or 2 A critical component is any component of a life systems which (a) are intended for surgical implant support device or system whose failure to perform can into the body or (b) support or sustain life and whose be reasonably expected to cause the failure of the life failure to perform when properly used in accordance support device or system or to affect its safety or with instructions for use provided in the labeling can effectiveness be reasonably expected to result in a significant injury to the user National Semiconductor National Semiconductor National Semiconductor National Semiconductor Corporation Europe Hong Kong Ltd Japan Ltd 1111 West Bardin Road Fax (a49) 0-180-530 85 86 13th Floor Straight Block Tel 81-043-299-2309 Arlington TX 76017 Email cnjwge tevm2 nsc com Ocean Centre 5 Canton Rd Fax 81-043-299-2408 Tel 1(800) 272-9959 Deutsch Tel (a49) 0-180-530 85 85 Tsimshatsui Kowloon Fax 1(800) 737-7018 English Tel (a49) 0-180-532 78 32 Hong Kong Fran ais Tel (a49) 0-180-532 93 58 Tel (852) 2737-1600 Italiano Tel (a49) 0-180-534 16 80 Fax (852) 2736-9960 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