AD8067 Analog Devices, AD8067 Datasheet
AD8067
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AD8067 Summary of contents
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... The FET input bias current (5 pA max) and low voltage noise (6.6 nV/√Hz) also contribute to making it appropriate for precision applications. With a wide supply voltage range ( and rail-to-rail output, the AD8067 is well suited for a variety of applications that require wide dynamic range and low distortion. Rev. A Information furnished by Analog Devices is believed to be accurate and reliable ...
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... Input and Output Overload Behavior ..................................... 15 Input Protection ......................................................................... 16 Capacitive Load Drive ............................................................... 16 Layout, Grounding, and Bypassing Considerations .............. 16 Applications..................................................................................... 18 Wideband Photodiode Preamp ................................................ 18 Using the AD8067 at Gains of Less Than 8 ............................ 19 Single-Supply Operation ........................................................... 20 High Gain, High Bandwidth Composite Amplifier .............. 20 Outline Dimensions ....................................................................... 22 Ordering Guide .......................................................................... 22 Rev Page ...
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... AD8067 Unit MHz MHz MHz ns V/μs ns dBc dBc dBc dBc nV/√Hz fA/√Hz mV μV/° GΩ||pF GΩ|| ...
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... AD8067 SPECIFICATIONS FOR + +25° +10 Table 2. Parameter DYNAMIC PERFORMANCE −3 dB Bandwidth Bandwidth for 0.1 dB Flatness Output Overdrive Recovery Time (Pos/Neg) Slew Rate Settling Time to 0.1% NOISE/DISTORTION PERFORMANCE Spurious-Free Dynamic Range (SFDR) Input Voltage Noise Input Current Noise DC PERFORMANCE ...
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... AD8067 Max Unit MHz MHz MHz ns V/μs ns dBc dBc dBc dBc nV/√Hz fA/√Hz 1 μV/° GΩ||pF GΩ||pF +9.0 ...
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... MAXIMUM POWER DISSIPATION The associated raise in junction temperature (T limits the maximum safe power dissipation in the AD8067 package. At approximately 150°C, which is the glass transition temperature, the plastic changes its properties. Even temporarily exceeding this temperature limit can change the stresses that the package exerts on the die, permanently shifting the parametric performance of the AD8067 ...
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... SNUB FREQUENCY – MHz Figure 8. Small Signal Frequency Response for Various 0.2V p-p, 2V p-p OUT p-p OUT FREQUENCY – MHz Figure 9. Frequency Response for Various Output Amplitudes AD8067 100 = 100pF L = 5pF 100 LOAD 100 ...
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... AD8067 200mV p-p OUT FREQUENCY – MHz Figure 10. Small Signal Frequency Response for Various R –40 HD2 R = 150Ω LOAD –50 –60 –70 –80 HD2 R = 1kΩ LOAD –90 –100 –110 HD3 R = 1kΩ LOAD – ...
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... Figure 18. Long-Term Settling Time 1.5V Figure 19. Small Signal Transient Response ± Supply G = +10 = ±12V p +10 5V/DIV Figure 20. Large Signal Transient Response +0.1% –0.1% t 5μs/DIV Rev Page AD8067 100pF 20mV p 0pF L 50mV/DIV 25ns/DIV 50ns/DIV V (1V/DIV +10 OUT V – ...
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... AD8067 TEMPERATURE – °C Figure 22. Input Bias Current vs. Temperature 1800 1600 1400 1200 1000 800 600 400 200 0 –1 0 INPUT OFFSET VOLTAGE – mV Figure 23. Input Offset Voltage Histogram 1000 100 100 1k 10k 100k FREQUENCY – ...
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... Figure 32. Output Saturation Voltage vs. Temperature 140 130 120 110 100 100 50 0 Figure 33. Open-Loop Gain vs. Load Current for Various Supplies Rev Page AD8067 = ±12V ± +5V S – TEMPERATURE – °C = 1kΩ ±12V (V – ...
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... AD8067 110Ω 0.1μF 1kΩ 10μF –V EE Figure 37. CMRR Test Circuit 110Ω 1kΩ AD8067 0.1μF 100Ω 10μF + –V EE Figure 38. Positive PSRR Test Circuit +V CC 10μF + 0.1μF 110Ω 1kΩ AD8067 1 100Ω ...
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... Closed Loop–3 dB Frequency GBP DC Gain = GBP is the gain bandwidth product of the amplifier. Typical GBP for the AD8067 is 300 MHz. See Table 5 for the recommended values for R and Noninverti ng Configurat ion Noise 0.1μ ...
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... This minimizes nonlinear common-mode capacitive effects that can significantly degrade settling time and distortion performance. The AD8067 has a low input voltage noise of 6.6 nV/ √ Hz. Source resistances greater than 500 Ω at either input terminal notably increases the apparent referred-to-input (RTI) voltage noise of the application ...
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... V from the positive supply threshold. The output transistors have circuitry included to limit the extent of their saturation when the output is overdriven. This improves output recovery time. A plot of the output recovery time for the AD8067 used +10 buffer is shown in Figure 17. V THRESHOLD ...
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... Capacitive load introduces a pole in the amplifier loop response due to the finite output impedance of the amplifier. This can cause excessive peaking and ringing in the response. The AD8067 with a gain of +10 handles capacitive load without an excessive amount of peaking (see Figure 8). If greater capacitive load drive is required, consider inserting a small resistor in series with the load (24.9 Ω ...
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... A parallel combination of a 0.1 μF ceramic and a 10 μF electrolytic, covers a wide range of rejection for unwanted noise. The 10 μF capacitor is less critical for high frequency bypassing, and in most cases, one per supply line is sufficient. Rev Page AD8067 ...
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... RMS noise with R S and the total capacitance creates a zero in the F Figure 51 shows the AD8067 configured as a transimpedance photodiode amplifier. The amplifier is used in conjunction with a JDS uniphase photodiode detector. This amplifier has a is the feedback bandwidth of 9.6 MHz, as shown in Figure 52, and is verified by F the design equations shown in Figure 50 ...
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... In addition, the distortion performance is degraded. To avoid excessive overshoot and ringing when driving a capacitive load, the AD8067 should be buffered by a small series resistor; in this case Ω resistor was used. Rev Page ...
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... V; therefore, 1.5 V was selected as a reference, which allows for a 100 mV signal at the input. Figure 56 shows the AD8067 configured for 5 V supply operation with a reference voltage of 1.5 V. Capacitors C1 and C5 ac couple the signal into and out of the amplifier and partially determine the bandwidth of the input and output structures ...
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... The output stage is set for a gain of 10; therefore, the AD8067 has an effective gain of 10, thereby allowing it to maintain a bandwidth in excess of 55 MHz. The circuit can be tailored for different gain values; keeping the ratios roughly the same ensures that the bandwidth integrity is maintained ...
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... AD8067ART-REEL –40°C to +85°C AD8067ART-REEL7 –40°C to +85°C AD8067ART-R2 –40°C to +85°C 1 AD8067ARTZ-REEL –40°C to +85°C 1 AD8067ARTZ-REEL7 –40°C to +85°C 1 AD8067ARTZ-R2 –40°C to +85° Pb-free part, # denotes lead-free product may be top or bottom marked. 2.90 BSC ...
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... NOTES Rev Page AD8067 ...
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... AD8067 NOTES ©2006 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. C03205–0–5/06(A) Rev Page ...