LH0024 High Slew Rate Operational Amplifier General Description The LH0024/LH0024C is a very wide bandwidth, high slew rate operational amplifier intended to fulfill a wide variety of high speed applications such as buffers to A to D and D to A converters and high speed comparators. The device exhibits useful gain in excess of 50 MHz making it possible to use in video applications requiring higher gain accuracy than is usually associated with such amplifiers. The LH0024/LH0024C’s combination of wide bandwidth and high slew rate make it an ideal choice for a variety of high speed applications including active filters, oscillators, and comparators as well as many high speed general purpose applications. The LH0024 is guaranteed over the temperature range b 55§ C to a 125§ C, whereas the LH0024C is guaranteed b 25§ C to a 85§ C. Features Y Y Y Y Y Y Very high slew rateÐ500 V/ms at AV e a 1 Wide small signal bandwidthÐ70 MHz Wide large signal bandwidthÐ15 MHz High output swingÐ g 12V into 1k Low input offsetÐ2 mV Pin compatible with standard IC op amps Schematic and Connection Diagrams Metal Can Package TL/K/5552 – 2 Top View Note: For heat sink use Thermalloy 2230-5 series. Order Number LH0024H, LH0024H-MIL or LH0024CH See NS Package Number H08B TL/K/5552 – 1 C1995 National Semiconductor Corporation TL/K/5552 RRD-B30M115/Printed in U. S. A. LH0024 High Slew Rate Operational Amplifier February 1995 Absolute Maximum Ratings Storage Temperature Range If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/Distributors for availability and specifications. (Note 2) g 18V Supply Voltage Input Voltage Differential Input Voltage Power Dissipation b 65§ C to a 150§ C Lead Temperature (Soldering, 10 sec.) 260§ C ESD rating to be determined. Operating Temperature Range Equal to Supply g 5V 600 mW LH0024 LH0024C b 55§ C to a 125§ C b 25§ C to a 85§ C DC Electrical Characteristics (Note 1) Parameter LH0024 Conditions Min LH0024C Typ Max 2.0 4.0 6.0 Min Units Typ Max 5.0 8.0 10.0 Input Offset Voltage RS e 50X, TA e 25§ C RS e 50X Average Temperature Coefficient of Input Offset Voltage VS e g 15V, RS e 50X b 55§ C to 125§ C Input Offset Current TA e 25§ C 2.0 5.0 10.0 4.0 15.0 20.0 mA mA Input Bias Current TA e 25§ C 15 30 40 18 40 50 mA mA 12.5 15 12.5 15 b 20 Supply Current Large Signal Voltage Gain VS e g 15V, RL e 1k, TA e 25§ C VS e g 15V, RL e 1k Input Voltage Range Output Voltage Swing Slew Rate b 25 mV mV mV/§ C mA 4 3 5 3 2.5 4 V/mV V/mV VS e g 15V g 12 g 13 g 12 g 13 V VS e g 15V, RL e 1k, TA e 25§ C VS e g 15V, RL e 1k g 12 g 10 g 13 g 10 g 10 g 13 V V VS e g 15V, RL e 1k, C1 e C2 e 30 pF, AV e a 1, TA e 25§ C 400 500 250 400 V/ms Common-Mode Rejection Ratio VS e g 15V, DVIN e g 10V, RS e 50X 60 60 dB Power Supply Rejection Ratio g 5V s VS s g 18V, RS e 50X 60 60 dB Note 1: These specifications apply for VS e g 15V and b 55§ C to a 125§ C for the LH0024 and b 25§ C to a 85§ C for the LH0024C. Note 2: Refer to RETS0024 for LH0024H military specifications. Frequency Compensation Frequency Compensation Circuit TABLE I Closed Loop Gain C1 C2 C3 100 0 0 0 20 0 0 0 10 0 20 pF 1 pF 1 30 pF 30 pF 3 pF TL/K/5552 – 6 2 Typical Performance Characteristics Maximum Power Dissipation Large Signal Frequency Response Open Loop Frequency Response Voltage Follower Pulse Response Input Voltage vs Supply Voltage Output Voltage Swing Supply Current vs Supply Voltage Input Bias Current vs Voltage TL/K/5552 – 7 Applications Information LAYOUT CONSIDERATIONS The LH0024/LH0024C, like most high speed circuitry, is sensitive to layout and stray capacitance. Power supplies should be by-passed as near the device as is practicable with at least 0.01 mF disc type capacitors. Compensating capacitors should also be placed as close to device as possible. quire adjustment in order to perfectly cancel the input capacitance of the device. When operating the LH0024/LH0024C at a gain of a 1, the value of R1 should be at least 1 kX. The case of the LH0024 is electrically isolated from the circuit; hence, it may be advantageous to drive the case in order to minimize stray capacitances. COMPENSATION RECOMMENDATIONS Compensation schemes recommended in Table 1 work well under typical conditions. However, poor layout and long lead lengths can degrade the performance of the LH0024 or cause the device to oscillate. Slight adjustments in the values for C1, C2, and C3 may be necessary for a given layout. In particular, when operating at a gain of b1, C3 may re- HEAT SINKING The LH0024/LH0024C is specified for operation without the use of an explicit heat sink. However, internal power dissipation does cause a significant temperature rise. Improved offset voltage drift can be obtained by limiting the temperature rise with a clip-on heat sink such as the Thermalloy 2228B or equivalent. 3 Typical Applications TTL Compatible Comparator Offset Null TL/K/5552 – 3 TL/K/5552 – 4 Video Amplifier R1 e R2 e R3 e R4 AV e R5 a (R3 R4) e5 (R3) (R4) TL/K/5552 – 5 4 5 LH0024 High Slew Rate Operational Amplifier Physical Dimensions inches (millimeters) Metal Can Package (H) Order Number LH0024H, LH0024H-MIL or LH0024CH NS Package Number H08B 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: 1. 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