LM2202

LM2202 NSC | Alldatasheet

Document overview

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Technical content

Features

n Wideband video amplifier (f−3dB = 230 MHz at VO = 4V PP ) n tr,tf = 1.5 ns at VO = 4V PP n Externally gated comparator for brightness control n 0V to 4V high input impedance DC contrast control (>40 dB range) n 0V to 4V high input impedance DC drive control (±3 dB range) n Easy to parallel three LM2202s for optimum color tracking in RGB systems n Output stage clamps to 0.65V and provides up to 9V output voltage swing n Output stage directly drives most hybrid or discrete CRT amplifier stages n Replacement for the LM1202

Applications

n High resolution CRT monitors n Video switches n Video AGC amplifier n Wideband amplifier with gain and DC offset control Block and Connection Diagram DS012591-1 Order Number LM2202N or LM2202M See NS Package Number N20A or M20B April 1999 LM2202 230 MHz Video Amplifier System © 1999 National Semiconductor Corporation DS012591 www.national.com

Absolute Maximum Ratings(Note 1) If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Supply Voltage V CC Pins 4, 7, 16 to Ground Pins 5, 13, 15 13.5V Voltage at Any Input Pin (VIN)V CC ≥ VIN ≥ GND Video Output Current (I17)2 8 m A Package Power Dissipation at TA = 25˚C 1.56W (Above 25˚C Derate BasedθJA and TJ) Package Thermal Resistance (θJA) N20A 68˚C/W M20B 90˚C/W Junction Temperature (T J) 150˚C Storage Temperature Range (Tstg) −65˚C to +150˚C Lead Temperature N Package (Soldering, 10 sec.) 265˚C ESD Susceptibility Human Body Model: 100 pF Discharged through a 1.5k Resistor 1.5 kV Operating Ratings(Note 2) Temperature Range −20˚C to +80˚C Supply Voltage (VCC )8 V ≤ VCC ≤ 13.2V See Test Circuit (Figure 1), TA = 25˚C, V4= V7 = V16 = 12V, S1 Open, V19= 4V, V8= 4V, V9= 4V, V14= 0V unless other- wise noted. Symbol Parameter Conditions Typical (Note 3) Limit(Note 4) Units IS 4, 7, 16 Total Supply Current R LOAD = ∞ (Note 5) 48 60 mA (max) V6 Video Input Bias Voltage 2.4 2 V (min) V14L Clamp Gate Low Input Voltage Clamp Comparator On 0.8 V (max) V14H Clamp Gate High Input Voltage Clamp Comparator Off 2 V (min) I14L Clamp Gate Low Input Current V 14 = 0V −0.5 µA I14H Clamp Gate High Input Current V 14 = 12V 0.005 µA I12+ Clamp Cap Charge Current V 12 = 0V 800 500 µA (min) I12− Clamp Cap Discharge Current V 12 = 5V −800 −500 µA (min) V17L Video Output Low Voltage V 12 = 0V 0.2 0.65 V (max) V17H Video Output High Voltage V 12 = 6V 10 9 V (min) VOS Comparator Input Offset Voltage V 18 −V 19 15 ±50 mV (max) See Test Circuit (Figure 1), TA = 25˚C, V4= V7 = V16 = 12V, S1 Closed, V19= 4V, V8= 4V, V9= 4V, V14= 0V unless oth- erwise noted. Symbol Parameter Conditions Typical (Note 3) Limit(Note 4) Units R IN Video Amplifier Input Resistance f IN = 12 kHz 20 k Ω AV max Video Amplifier Gain V 8 = 4V, V9 = 4V 20 16 V/V (min) ΔAV 2V Attenuation at 2V Ref: A V max, V8 = 2V −6 dB ΔAV 0.5V Attentuation at 0.5V Ref: A V max, V8 = 0.5V −38 −23 dB (min) Δ Drive Δ Gain Range V 9 = 0V to 4V 6 5 dB (min) THD Video Amplifier Distortion V O = 4V PP ,fIN = 12 kHz 0.5 1 % (max) f−3 dB Video Amplifier Bandwidth (Note 6) V O = 4V PP 230 MHz tr Output Rise Time (Note 6) V O = 4V PP 1.5 2 ns (max) tf Output Fall Time (Note 6) V O = 4V PP 1.5 2 ns (max) Note 1:Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Note 2:Operating Ratings indicate conditions for which the device is 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. Some performance characteristics may de- grade when the device is not operated under the listed test conditions. Note 3:Typical specifications are specified at +25˚C and represent the most likely parametric norm. Note 4:Tested limits are guaranteed to National’s AOQL (Average Outgoing Quality Level). Note 5:The supply current specified is the quiescent current for VCC1 ,VCC2 and VCC3 with RLoad = ∞ , seeFigure 1’stest circuit. The total supply current also de- pends on the output load, RLoad. The increase in device power dissipation due to RLoad must be taken into account when operating the device at the maximum am- bient temperature. Note 6:When measuring video amplifier bandwidth or pulse rise and fall times, a double sided full ground plane printed circuit board is recommended. The measured rise and fall times are effective rise and fall times, taking into account the rise and fall times of the generator and the oscilloscope. www.national.com 2

FIGURE 1. LM2202 Test Circuit

FIGURE 4. Simplified Schematic of LM2202 Video Amplifier Output Stage

FIGURE 5. Simplified Schematic of LM2202 Contrast Control

FIGURE 6. Simplified Schematic of the LM2202 Drive Control

FIGURE 7. Simplified Schematic of the LM2202 Clamp Gate Circuit

FIGURE 9. Typical LM2202 Application (Single Video Channel)

FIGURE 10. Typical RGB Application with Contrast, Drive and Black Level (Cutoff) Control

Power Down Characteristics The LM2202 includes a built-in power down spot killer to pre- vent a flash on the screen upon power down. The LM2202’s output voltage decreases as the device is being powered down, thus preventing a flash on the screen. In some pream- plifiers, the video output signal may go high as the device is being powered down. This may cause a whiter-than-white level at the output of the CRT driver, thus causing a flash on the screen. PC Board Layout Considerations For optimum performance and stable operation, a double-sided printed circuit board with adequate ground plane and power supply decoupling as close to the V CC pins as possible is recommended. For suggestions on optimum PC board layout, please see the reference section below. Reference Ott, Henry W,Noise Reduction Techniques in Electronic Systems , John Wiley & Sons, New York, 1976. www.national.com15

Physical Dimensionsinches (millimeters) unless otherwise noted Order Number LM2202M Order Number LM2202N www.national.com 16

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 AND GENERAL COUNSEL OF NATIONAL SEMICONDUCTOR CORPORATION. As used herein: 1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, and whose failure 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. 2. A critical component is any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. National Semiconductor Corporation Americas Tel: 1-800-272-9959 Fax: 1-800-737-7018 Email: support@nsc.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 Français 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: 81-3-5639-7560 Fax: 81-3-5639-7507 www.national.com LM2202 230 MHz Video Amplifier System 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.