AD8147 Analog Devices, AD8147 Datasheet
AD8147
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AD8147 Summary of contents
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... The AD8146/AD8147/AD8148 are high speed triple, differential or single-ended input to differential output drivers. The AD8146 and AD8147 have a fixed gain of 2, and the AD8148 has a fixed gain of 4. They are all specifically designed for the highest resolution component video signals but can be used for any ...
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... AD8146/AD8147/AD8148 TABLE OF CONTENTS Features .............................................................................................. 1 Applications....................................................................................... 1 Functional Block Diagrams............................................................. 1 General Description ......................................................................... 1 Revision History ............................................................................... 2 Specifications..................................................................................... 3 Absolute Maximum Ratings............................................................ 7 Thermal Resistance ...................................................................... 7 ESD Caution.................................................................................. 7 Pin Configuration and Function Descriptions............................. 8 Typical Performance Characteristics ........................................... 10 Theory of Operation ...................................................................... 14 Definition of Terms.................................................................... 14 Analyzing an Application Circuit............................................. 14 Closed-Loop Gain ...................................................................... 14 Calculating the Input Impedance............................................. 15 REVISION HISTORY 5/07— ...
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... SPECIFICATIONS V = ±5V (AD8146); SYNC LEVEL = 0 V (AD8147/AD8148 25° OCM −40°C to +85°C. MIN MAX Table 1. Parameter DIFFERENTIAL INPUT AC Dynamic Performance −3 dB Small Signal Bandwidth −3 dB Large Signal Bandwidth Bandwidth for 0.1 dB Flatness Slew Rate Isolation Between Amplifiers ...
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... O, cm SYNC LEVEL ΔV /ΔV (AD8147/AD8148 SYNC LEVEL ΔV /ΔV (AD8147/AD8148 SYNC LEVEL AD8146 AD8147/AD8148 Disabled, AD8146/AD8147 and AD8148 AD8146 AD8147/AD8148 Disabled ΔV /ΔV ; ΔV = ±1 V OUT (AD8146/AD8147/AD8148) Each output, OPD input @ Rev Page ...
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... ±2 midsupply (AD8146); SYNC LEVEL = 0 V (AD8147/AD8148 25° OCM −40°C to +85°C. MIN MAX Table 2. Parameter DIFFERENTIAL INPUT AC Dynamic Performance −3 dB Small Signal Bandwidth −3 dB Large Signal Bandwidth Bandwidth for 0.1 dB Flatness DIFFERENTIAL INPUT DC Input Common-Mode Voltage Range ...
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... AD8147/AD8148 O, cm SYNC LEVEL ΔV /ΔV , AD8147/AD8148 O, cm SYNC LEVEL ΔV /ΔV , AD8147/AD8148 O, cm SYNC LEVEL AD8146 AD8147/AD8148 Disabled, AD8146/AD8147 and AD8148 AD8146 AD8147/AD8148 Disabled, AD8146/AD8147/AD8148 ΔV /ΔV ; ΔV = ±1 V, OUT AD8146/AD8147/AD8148 Each output, OPD input @ Rev Page ...
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... JA 24-Lead LFCSP/4-Layer 57 Maximum Power Dissipation The maximum safe power dissipation in the AD8146/ AD8147/AD8148 package is limited by the associated rise in junction temperature ( the die. At approximately 150°C, J which is the glass transition temperature, the plastic changes its properties. Even temporarily exceeding this temperature limit ...
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... AD8146/AD8147/AD8148 PIN CONFIGURATION AND FUNCTION DESCRIPTIONS Table 5. AD8146 Pin Function Descriptions Pin No. Mnemonic 1 OPD S− 3 − + −OUT A 7 +OUT A 8, 11, 17 +OUT B 10 −OUT B 12 +OUT C 13 −OUT − OCM ...
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... Table 6. AD8147/AD8148 Pin Function Descriptions Pin No. Mnemonic 1 OPD S− 3 − + −OUT R 7 +OUT +OUT G 10 −OUT G 12 +OUT B 13 −OUT − (SYNC SYNC LEVEL 19 H SYNC 20 V SYNC 21 V (SYNC) S− ...
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... AD8146/AD8147/AD8148 TYPICAL PERFORMANCE CHARACTERISTICS V = ±5V (AD8146); SYNC LEVEL = 0 V (AD8147/AD8148 25° OCM −40°C to +85°C. MIN MAX p-p OUT AD8146 (±2.5V) 4 AD8146 (±5.0V) AD8147 (±2.5V) 3 AD8147 (±5.0V –1 10 100 FREQUENCY (MHz) Figure 6. AD8146/AD8147 Large Signal Frequency Response for Various Supplies ...
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... V = ±2. ±5.0V S 0.5 0 –0.5 –1.0 –1 TIME (ns) Figure 12. AD8146/AD8147 Large Signal Transient Response for Various Supplies 150 V = ±2.5V S 100 V = ±5. –50 –100 –150 TIME (ns) Figure 13. AD8146/AD8147 Small Signal Transient Response for Various Supplies – ...
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... INPUT × OUTPUT (V = ±2.5V) S –2 –4 –6 –8 –10 0 100 200 300 400 500 600 TIME (ns) Figure 20. AD8146/AD8147 Output Overdrive Recovery –100 100 1000 AD8148 –100 –110 –120 1000 10000 100000 = ±5.0V ±5.0V ±2.5V) S 700 800 900 1000 Rev Page – ...
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... FREQUENCY (MHz) Figure 25. V Common-Mode Rejection Ratio OCM 100 120 –60 Figure 26. AD8147/AD8148 Supply Current vs. Temperature 1.5 ±V 1.0 0.5 0 –0.5 –1.0 –1.5 1000 0 Figure 27. AD8146 Large Signal V Rev Page AD8146/AD8147/AD8148 I + (±5.0V OPEN CIRCUIT (± ...
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... The differential mode gain of the circuit in Figure 28 can be described OUT IN, dm where 1.0 kΩ and R is 500 Ω nominally for the AD8146 and F G AD8147 2.0 kΩ and R is 500 Ω nominally for the AD8148 IN, dm OCM – Figure 28 ...
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... V inputs are set to nominally 1.4 V with respect to SYNC GND, and the exposed paddles of the AD8147 and AD8148 are used as the GND references for the incoming sync pulses. When ±2.5 V supplies are used, however, external protection is required to limit the positive excursion to less than 2.5 V. For more details, see the Applications section ...
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... B OUT B presented in Figure 30. Because the AD8147/AD8148 have the 49.9Ω + sync encoding scheme implemented internally, the user simply applies the horizontal and vertical sync signals to the appropriate inputs. (See the Specifications tables for the high and low levels of the horizontal and vertical sync pulse voltages). 49.9Ω ...
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... B OCM +OUT B 1kΩ Figure 31. AD8147 Sync-On Common-Mode Signals in Single 5 V Application The transmitted common-mode sync signal magnitudes are scaled by applying a dc voltage to the SYNC LEVEL input, referenced to GND. The difference between the voltage applied to the SYNC LEVEL input and GND sets the peak deviation of the encoded sync signals about the midsupply, common-mode voltage ...
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... AD8146/AD8147/AD8148 Sync pulse amplitudes applied to the AD8147 and AD8148 must be less than or equal to the positive supply voltage. In low positive supply applications, such as those that use ±2.5 V supplies, external limiting may be required because many logic families produce amplitudes Figure 32 illustrates how to use a monolithic triple diode to limit a sync pulse with 5 V amplitude to an amplitude of approximately 2 V ...
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... Most applications include 49.9 Ω source termination resistors, which effectively buffer any stray load capacitance. Rev Page AD8146/AD8147/AD8148 CROSSPOINT SWITCH INPUT I, NEGATIVE PHASE INPUT I, POSITIVE PHASE INPUT J, NEGATIVE PHASE ...
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... AD8146/AD8147/AD8148 Under no circumstances should capacitance be intentionally added to an output to introduce frequency domain peaking. Figure 36 and Figure 37 illustrate how adding just excessive load capacitance influences time and frequency domain responses. 2.0 1 5pF L 1.0 0 0pF L 0 –0.5 –1.0 –1.5 –2 ...
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... PCB planes. The exposed paddle must therefore be soldered to a pad on the top of the board that is connected to an inner plane with several thermal vias. The AD8147/AD8148 use the paddle as a ground reference; therefore, for these parts, the PCB plane used must be the ground plane. ...
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... AD8146ACPZ-R7 1 −40°C to +85°C 1 AD8146ACPZ-RL −40°C to +85°C AD8147ACPZ-R2 1 −40°C to +85°C 1 AD8147ACPZ-R7 −40°C to +85°C AD8147ACPZ-RL 1 −40°C to +85°C 1 AD8148ACPZ-R2 −40°C to +85°C AD8148ACPZ-R7 1 −40°C to +85°C 1 AD8148ACPZ-RL −40°C to +85° RoHS Compliant Part ...
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... NOTES AD8146/AD8147/AD8148 Rev Page ...
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... AD8146/AD8147/AD8148 NOTES ©2007 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. D06655-0-5/07(0) Rev Page ...