LM1205N

LM1205 NSC | Alldatasheet

Document overview

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Technical content

Features

Y Three wideband video amplifiers 130 MHz (LM1205) @ b3d B( 4V PP output) Y Matched ( g0.1 dB or 1.2%) attenuators for contrast control Y Three externally gated single ended input comparators for cutoff and brightness control Y 0V to 4V, high input impedance DC contrast control l40 dB range) Y 0V to 4V, high input impedance DC drive control for each video amplifier ( b6 dB to 0 dB range) Y Spot killer, blanks output when V CC k 10.6V Y Capable of 7 V PP output swing (slight reduction in bandwidth) Y Output stage blanking Y Output stage directly drives most hybrid or discrete CRT drivers

Applications

Y High resolution RGB CRT monitors Y Video AGC amplifiers Y Wideband amplifiers with gain and DC offset controls Y Interface amplifiers for LCD or CCD systems Block and Connection Diagram TL/H/11881–1 FIGURE 1 Order Number LM1205N or LM1207N See NS Package Number N28B C1996 National Semiconductor Corporation RRD-B30M66/Printed in U. S. A.

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 3, 11, 22, 23, 25 (Note 3) 15V Peak Video Output Source Current (Any One Amp) Pins 17, 20 or 26 28 mA Voltage at Any Input Pin (V IN)V CC t VIN t GND Power Dissipation (P D) (Above 25 §C Derate Based on iJA and T J) 2.5W Thermal Resistance ( iJA)5 0 §C/W Junction Temperature (T J) 150 §C ESD Susceptibility (Note 4) 2 kV Pins 12, 13 and 14 1.9 kV Storage Temperature b65§Ct o1 5 0 §C Lead Temperature (Soldering, 10 sec.) 265 §C Operating Ratings (Note 2) Temperature Range b20§Ct o8 0 §C Supply Voltage (V CC) 10.8V s VCC s 13.2V V14 e 0V; V cut-off e 1.0V; V 13 e 4V; V drive e 4V unless otherwise stated. Symbol Parameter Conditions Typical Limit Units(Note 5) (Note 6) IS Supply Current V CC1 a VCC2,R L e % (Note 7) 90 105 mA (max) V4, 6, 9 Video Amplifier Input Bias Voltage 2.8 V RIN Video Input Resistance Any One Amplifier 20 k X V14l Clamp Gate Low Input Voltage Clamp Comparators On 1.2 0.8 V (max) V14h Clamp Gate High Input Voltage Clamp Comparators Off 1.6 2.0 V (min) I14l Clamp Gate Low Input Current V 14 e 0V b1 b5 mA (max) I14h Clamp Gate High Input Current V 14 e 12V 0.01 1.0 mA (max) Iclamp Clamp Cap Charge Current Clamp Comparators On g750 g500 mA (min) Ibias Clamp Cap Bias Discharge Current Clamp Comparators Off 500 nA V13l Blank Gate Low Input Voltage Blank Gate On 1.2 0.8 V (max) V13h Blank Gate High Input Voltage Blank Gate Off 1.6 2.0 V (min) I13l Blank Gate Low Input Current V 13 e 0V b8.5 b11.0 mA (max) I13h Blank Gate High Input Current V 13 e 12V 0.01 1.0 mA (max) VOL Video Output Low Voltage V cut-off e 0V 0.15 0.5 V (max) VOH Video Output High Voltage V cut-off e 9V 7.5 7 V (min) VO(1V) Video Black Level Output Voltage V cut-off e 1V 1.0 V (Note 8) DVO(1V) Video D Black Level Output Voltage Between Any Two Amplifiers, g100 mV (max)Vcut-off e 1V VOL(blanked) Video Output Blanked Voltage V 13 e 0V 35 70 mV (max) I12, 15, 18 or 28 Contrast/Drive Control Input Current V contrast e Vdrive e 0V to 4V b250 nA I16, 19 and 27 Cut-Off Control Input Current (All Inputs) V cut-off e 0V to 4V b500 nA Vspot Spot Killer Voltage V CC Adjusted to Activate 10.4 10.8 V (max) http:/ /www.national.com 2

adjust Video Output pins 17, 20, and 26 to 4V DC for the AC test unless otherwise stated. (Note 14) Symbol Parameter Conditions Typical Limit Units(Note 5) (Note 6) AV max Video Amplifier Gain V12 e 4V, V IN e 635 mV PP 7.0 6.0 V/V (min) Vdrive e 4V 16.9 15.6 dB (min) DAV2 V Attenuation @ 2V Ref: A V max, V12 e 2V b6d B DAV 0.25V Attenuation @ 0.25V Ref: A V max, V12 e 0.25V b40 dB DDrive Drive Control Range V drive e 0V to 4V, V12 e 4V 6 dB AV match Absolute Gain Match @ AV max V12 e 4V, V drive e 4V (Note 9) g0.3 dB AV track1 Gain Change Between Amplifiers V12 e 4V to 2V (Notes 9, 10) g0.1 dB THD Video Amplifier Distortion V O e 1V PP,f e 10 kHz 1 % f( b3 dB) Video Amplifier Bandwidth V12 e 4V, V drive e 4V, LM1205 130 MHz(Notes 11, 12) VO e 4V PP LM1207 85 tr(Video) Video Output Rise Time (Note 11) V O e 4V PP LM1205 2.6 ns LM1207 4.3 tf(Video) Video Output Fall Time (Note 11) V O e 4V PP LM1205 3.6 ns LM1207 4.3 Vsep 10 kHz Video Amplifier 10 kHz Isolation V12 e 4V (Note 13) b70 dB Vsep 10 MHz Video Amplifier 10 MHz Isolation V12 e 4V (Notes 11, 13) b50 dB tr(Blank) Blank Output Rise Time (Note 11) Blank Output e 1V PP 7n s tf(Blank) Blank Output Fall Time (Note 11) Blank Output e 1V PP 7n s tpw(Clamp) Min. Back Porch Clamp Pulse Width 200 ns 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 degrade when the device is not operated under the listed test conditions. Note 3: V CC supply pins 3, 11, 22, 23, 25 must be externally wired together to prevent internal damage during V CC power on/off cycles. Note 4: Human body model, 100 pF discharged through a 1.5 k X resistor. Note 5: Typical specifications are specified at a25§C and represent the most likely parametric norm. Note 6: Tested limits are guaranteed to National’s AOQL (Average Outgoing Quality Level). Note 7: The supply current specified is the quiescent current for V CC1 and V CC2 with R L e %, see Figure 2’s test circuit. The supply current for V CC2 (pin 23) also depends on the output load. With video output at 1V DC, the additional current through V CC2 i s8m Af o r Figure 2’s test circuit. Note 8: Output voltage is dependent on load resistor. Test circuit uses R L e 390X. Note 9: Measure gain difference between any two amplifiers. V IN e 635 mV PP. Note 10: DAV track is a measure of the ability of any two amplifiers to track each other and quantifies the matching of the three attenuators. It is the difference in gain change between any two amplifiers with the contrast voltage (V12) at either 4V or 2V measured relative to an A V max condition, V12 e 4V. For example, at A V measured typical g 0.1 dB channel tracking. Note 11: When measuring video amplifier bandwidth or pulse rise and fall times, a double sided full ground plane printed circuit board without socket is recommended. Video amplifier 10 MHz isolation test also requires this printed circuit board. The reason for a double sided full ground plane PCB is that large measurement variations occur in single sided PCBs. Note 12: Adjust input frequency from 10 MHz (A V max reference level) to the b3 dB corner frequency (f b3d B ). Note 13: Measure output levels of the other two undriven amplifiers relative to the driven amplifier to determine channel separation. Terminate the undriven amplifier inputs to simulate generator loading. Repeat test at f IN e 10 MHz for V sep 10 MHz . Note 14: During the AC tests the 4V DC level is the center voltage of the AC output signal. For example, if the output is 4 V PP the signal will swing between 2V DC and 6V DC. http:/ /www.national.com3

Typical Performance Characteristics VCC e 12V, T A e 25§C unless otherwise specified Attenuation vs Contrast Voltage TL/H/11881–2 Attenuation vs Drive Voltage TL/H/11881–3 LM1205 Crosstalk vs Frequency TL/H/11881–4 LM1205 Contrast vs Frequency TL/H/11881–5 LM1205 Drive vs Frequency TL/H/11881–6 http:/ /www.national.com 4

Typical Performance Characteristics VCC e 12V, T A e 25§C unless otherwise specified (Continued) LM1207 Crosstalk vs Frequency TL/H/11881–7 LM1207 Contrast vs Frequency TL/H/11881–8 LM1207 Drive vs Frequency TL/H/11881–9 http:/ /www.national.com5

FIGURE 2. LM1205N/LM1207N DC Test Circuit

FIGURE 3. LM1205N/LM1207N AC Test Circuit

FIGURE 4. LM1205N/LM1207N PCB Test Circuit

FIGURE 16. Demonstration Board Layout

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LM1205/LM1207 130 MHz/85 MHz RGB Video Amplifier System with Blanking Physical Dimensions inches (millimeters) unless otherwise noted Order Number LM1205N or LM1207N 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. 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.

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