AD8187 AD [Analog Devices], AD8187 Datasheet
AD8187
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AD8187 Summary of contents
Page 1
... Switching RGB in LCD and Plasma Displays RGB Video Switchers and Routers GENERAL DESCRIPTION The AD8186 (G = +1) and AD8187 (G = +2) are high speed, single-supply, triple 2-to-1 multiplexers. They offer –3 dB large signal bandwidth of over 480 MHz along with a slew rate in excess of 1500 V/µs. With better than – all hostile crosstalk and – ...
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... EE –PSRR – All Channels ON All Channels OFF All Channels ON 15 MIN MAX –2– 2.5 V; AD8187 150 to 2.5 V; unless otherwise noted.) AD8186/AD8187 Typ Max 1000/1000 450/480 90/85 1600/1500 6/7.5 0.05/0.05 0.05/0.05 –84/–78 –52/–48 –90/–85 –84/–95 7/9 0 ...
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... Settling, INPUT = 1 V 50% Logic to 50% Output Settling, INPUT = 1 V All Channels Grounded All Channels Grounded SEL A/B, OE Inputs 1.6 SEL A/B, OE Inputs SEL A/ 2.0 V SEL A/ 0.5 V Operating (Still Air) –40 Operating (Still Air) Operating –3– AD8186/AD8187 AD8186/AD8187 Typ Max Unit 3.6/4 ns 4/3.8 ns 17/5 ns 21/45 mV 64/118 mV V 0.6 ...
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... ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily accumulate on the human body and test equipment and can discharge without detection. Although the AD8186/AD8187 features proprietary ESD protection circuitry, permanent damage may occur on devices subjected to high energy electrostatic discharges. Therefore, proper ESD precautions are recommended to avoid performance degradation or loss of functionality ...
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... R OUT 0.1 1.0 10.0 100.0 FREQUENCY (MHz) TPC 5. AD8187 Frequency Response, = 150 Ω p-p, R OUT L 1 – +85 C 0.1 1.0 10.0 100.0 FREQUENCY (MHz) TPC 6. AD8187 Large Signal Bandwidth vs. = 150 Ω Temperature p-p, R OUT L 0.5 0.4 0.3 0.2 0.1 0 –0.1 –0.2 10000.0 1000.0 +25 C 1000.0 ...
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... TPC 10. AD8187 All Hostile Crosstalk* vs. Frequency 0 –10 –20 –30 –40 –50 –60 –70 –80 –90 –100 –110 –120 100.0 1000.0 TPC 11. AD8187 Adjacent Channel Crosstalk* vs. Frequency 0 –10 –20 –30 –40 –50 –60 –70 –80 –90 –100 –110 –120 100 1000 TPC 12. AD8187 OFF Isolation* vs. Frequency – ...
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... TPC 17. AD8187 PSRR vs. Frequency 100 1000 10000 TPC 18. AD8187 Input Voltage Noise vs. Frequency –7– AD8186/AD8187 THIRD SECOND 1 10 FREQUENCY (MHz) = 150 Ω L –PSRR +PSRR 0. FREQUENCY (MHz ...
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... TPC 22. AD8187 Input Impedance vs. Frequency 1000 100 10 1 0.1 100 1000 0.1 TPC 23. AD8187 Enabled Output Impedance vs. Frequency 10000 1000 100 10 1 0.1 100.0 1000.0 0.1 TPC 24. AD8187 Disabled Output Impedance vs. Frequency –8– 1.0 10.0 100.0 1000.0 FREQUENCY (MHz) 1.0 10.0 100.0 1000.0 FREQUENCY (MHz) 1.0 10.0 100.0 1000.0 FREQUENCY (MHz) REV. A ...
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... OUTPUT 0 –0.5 –1.0 –1.5 –2 TIME (ns) TPC 27. AD8186 Large Signal Pulse Response Ω p-p, R OUT L REV. A 3.30 2.8 2.7 2.6 2.5 2.4 2.80 2.3 2.2 2.1 OUTPUT 2.0 1.9 2.30 1 TPC 28. AD8187 Small Signal Pulse Response 200 mV p-p, R OUT 4.0 5.0 3.5 4.5 3.0 4.0 2.5 3.5 2.0 1.5 3.0 1.0 2.5 0.5 OUTPUT 2.0 0 1.5 –0.5 –1.0 1 TPC 29. AD8187 Video Amplitude Pulse Response, V 4.0 7.0 3.5 6.5 3.0 6.0 2 ...
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... TPC 36. AD8187 Channel Switching Transient (Glitch), INA = INB = V –10– t SETTLED t 0 TIME (2ns/DIV) TPC 34. AD8187 Settling Time (0.1%), = 150 Ω Step, R OUT L SEL A/B OUTPUT TIME (ns p-p, INA = 3.0 V, INB = 2.0 V OUT SEL A/B OUTPUT ...
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... TIME (ns) TPC 38. AD8186 Channel Enable/Disable Transient (Glitch) REV. A 5.5 2.0 1.5 5.0 1.0 4.5 0.5 4.0 0 3.5 –0.5 3.0 –1.0 2.5 –1.5 –2.0 2.0 160 200 TPC 39. AD8187 Enable ON/OFF Time, V 3.0 2.00 2.9 1.50 2.8 1.00 2.7 0.50 2.6 0 2.5 –0.50 2.4 –1. TPC 40. AD8187 Channel Enable/Disable Transient (Glitch) –11– AD8186/AD8187 OE OUTPUT 120 160 TIME – ...
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... AD8186/AD8187 THEORY OF OPERATION The AD8186 (G = +1) and AD8187 (G = +2) are single-supply, triple 2:1 multiplexers with TTL compatible global input switch- ing and output-enable control. Optimized for selecting between two RGB (red, green, blue) video sources, the devices have high peak slew rates, maintaining their bandwidth for large signals. ...
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... V at black level to preferentially run video signals on the faster REF NPN transistor path. The AD8186 would, in this case, allow a reference voltage as low as 1 300 the AD8187 input bias REF is used, the sync pulse would be amplified to 600 mV. Therefore, the lower limit on V routing RGB video, an advantageous configuration would be to employ +3 V and – ...
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... While effective, this ruse also affects the dc and termina- tion characteristics Ω system. The AD8186 and AD8187 are built with a variable compensation scheme that senses the output reactance and trades bandwidth for phase margin, ensuring faster settling and lower overshoot at higher capacitive loads ...
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... For dc-coupled single-supply operation necessary to set an appropriate input dc level that is within the specified range of the amplifier. For the unity-gain AD8186, the output dc level will be the same as the input, while for the gain-of-two AD8187, the V input can be biased to obtain an appropriate output dc level. ...
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... AD8187. The input points of the AD8187 are switched to a 1.5 V reference by the ADG786, which works in the following manner: The SEL A/B signal selects the inputs to the AD8187. It also selects the switch positions in the ADG786 such that the same selected inputs will be connected to V During the horizontal interval, all of the RGB input signals are at a flat black level ...
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... EVALUATION BOARD REV. A Figure 12. Component Side Board Layout Figure 13. Circuit Side Board Layout –17– AD8186/AD8187 ...
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... AD8186/AD8187 Figure 14. Component Side Silkscreen Figure 15. Circuit Side Silkscreen –18– REV. A ...
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... REV. A Figure 16. Single-Supply Evaluation Board –19– AD8186/AD8187 ...
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... AD8186/AD8187 24-Lead Thin Shrink Small Outline Package [TSSOP] PIN 1 0.15 0.05 Revision History Location 6/03—Data Sheet changed from REV REV. A. Changes to SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Edits to TPCs 32, 35, and Updated OUTLINE DIMENSIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 OUTLINE DIMENSIONS (RU-24) Dimensions shown in millimeters 7.90 7.80 7. 4.50 4.40 4.30 6.40 BSC 1 12 0.65 1.20 BSC MAX 8 0 0.30 0.20 SEATING ...