ADA4859-3 Analog Devices, ADA4859-3 Datasheet
ADA4859-3
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ADA4859-3 Summary of contents
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... Consumer video Imaging Active filters GENERAL DESCRIPTION The ADA4859-3 (triple single-supply, high speed current feedback amplifier with an integrated charge pump that eliminates the need for negative supplies in order to output negative voltages or output level for video applications. The 195 MHz, large signal − ...
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... REVISION HISTORY 11/08—Revision 0: Initial Version Theory of Operation ...................................................................... 12 Overview ..................................................................................... 12 Charge Pump Operation ........................................................... 12 Applications Information .............................................................. 13 Using the ADA4859-3 in Gains Equal to +1, −1 ........................ 13 Video Line Driver ....................................................................... 14 Power-Down ............................................................................... 14 Layout Considerations ............................................................... 14 Power Supply Bypassing ............................................................ 14 Outline Dimensions ....................................................................... 15 ...
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... MHz MHz MHz +IN +IN Rise/fall MHz = MHz, HD2 ≤ −50 dBc PEAK C Enabled Powered down Referred to output Referred to output Rev Page ADA4859-3 Min Typ Max 265 195 60 740 20 −84/−93 −70/−83 − 0.01 0.02 −25 ...
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... ADA4859 25° 3 550 Ω Table 2. Parameter DYNAMIC PERFORMANCE −3 dB Bandwidth Bandwidth for 0.1 dB Flatness Slew Rate Settling Time to 0.1% NOISE/DISTORTION PERFORMANCE Total Harmonic Distortion Crosstalk Total Output Noise Input Current Noise Differential Gain Error Differential Phase Error DC PERFORMANCE ...
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... MAXIMUM POWER DISSIPATION The maximum power that can be safely dissipated by the ADA4859-3 is limited by the associated rise in junction temperature. The maximum safe junction temperature for plastic encapsulated devices is determined by the glass transition temperature of the plastic, approximately 150°C. ...
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... S 6 +IN3 7 −IN3 8 OUT3 OUT2 11 −IN2 12 +IN2 +IN1 15 −IN1 16 OUT1 17 (EPAD) Exposed Pad (EPAD) ADA4859-3 TOP VIEW (Not to Scale +IN2 + –IN2 C1_a 2 CHARGE PUMP C1_b 3 10 OUT2 CPO NOTES CONNECT. ...
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... FREQUENCY (MHz) Figure 8. Large Signal 0.1 dB Flatness vs. Capacitive Load 3.3V S –10 –20 –30 –40 –50 HD2 –60 –70 HD3 –80 – FREQUENCY (MHz) Figure 9. Harmonic Distortion vs. Frequency ADA4859 1000 C = 10pF L = 16pF L 1000 100 ...
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... ADA4859-3 0 –10 –20 –30 –40 –50 –60 –70 0 FREQUENCY (MHz) Figure 10. Power Supply Rejection Ratio (PSRR) vs. Frequency –40 –50 –60 –70 –80 –90 –100 0 FREQUENCY (MHz) Figure 11. Forward Isolation vs. Frequency 250 200 150 100 50 0 100 1k 10k FREQUENCY (Hz) Figure 12 ...
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... Figure 19. Large Signal Transient Response vs. Capacitive Load 1.5 1.0 0.5 0 –0.5 –1.0 –1 Figure 20. Large Signal Transient Response vs. Supply Voltage 900 800 700 600 500 400 300 200 100 2.0 2.5 Rev Page ADA4859-3 1 10pF C = 6pF 4pF L 0.5 0 TIME (5ns/DIV 3. TIME (5ns/DIV ...
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... ADA4859 –1 V OUT –2 –3 TIME (20ns/DIV) Figure 22. Output Overdrive Recovery 2.0 1.6 OUTPUT 1.2 0.8 0.4 0 –0.4 ERROR –0.8 –1.2 –1.6 –2.0 – TIME (ns) Figure 23. Settling Time (Rise) 0 –0.4 CHARGE PUMP CURRENT –0.8 –1.2 –1.6 AMPLIFIER CURRENT –2.0 – ...
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... CHARGE PUMP HARMONICS –105 –110 –115 –120 –125 –130 –135 –140 –145 –150 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 FREQUENCY (MHz) Figure 28. Output Spectrum vs. Frequency –100 –105 –110 –115 –120 –125 –130 –135 –140 –145 –150 4.0 4.5 5.0 0 Rev Page ADA4859 3.3V CHARGE PUMP HARMONICS S 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 FREQUENCY (MHz) Figure 29. Output Spectrum vs. Frequency 5.0 ...
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... The ADA4859-3 can be used in applications that require both ac- and dc-coupled inputs and outputs. The output stage on the ADA4859-3 is capable of driving 2 V p-p video signals into two doubly terminated video loads (150 Ω each single 5 V supply. The input range of the ADA4859-3 includes ground, whereas ...
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... Although the ADA4859-3 has a fixed gain +2, it can be used in other gain configurations, such −1 and G = +1. Unity-Gain Operation Option 1 There are two options for obtaining unity gain (G = +1) ...
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... FREQUENCY (MHz) Figure 38. Large Signal Frequency Response for Various Loads POWER-DOWN The ADA4859-3 is equipped with a PD (power-down) pin for all three amplifiers. This allows the user the ability to reduce the quiescent supply current when an amplifier is not active. The power-down threshold levels are derived from ground ...
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... LFCSP_VQ Rev Page 0.60 MAX (BOTTOM VIEW) PIN 1 INDICATOR 0.25 MIN 1.95 BSC FOR PROPER CONNECTION OF THE EXPOSED PAD, REFER TO THE PIN CONFIGURATION AND FUNCTION DESCRIPTIONS SECTION OF THIS DATA SHEET. Package Option Ordering Quantity CP-16-4 250 CP-16-4 1,500 CP-16-4 5,000 ADA4859-3 ...
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... ADA4859-3 NOTES ©2008 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. D07715-0-11/08(0) Rev Page ...