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AD8079: Dual 260 MHz Gain = +2.0 & +2.2 Buffer Data Sheet (Rev. A)10/31/1996PDF348 kB
Overview
Features and Benefits
- Factory Set Gain
Gain of 2.2 Compensates for System Gain Loss
Minimizes External Components
Tight Control of Gain and Gain Matching (0.1%) - Optimum Dual Pinout
Simplifies PCB Layout
Low Crosstalk of -70dB @ 5MHz - Excellent Video Specifications (RL=150 Ω)
Gain Flatness 0.1dB to 50MHz
0.01% Differential Gain Error
0.02° Differential Phase Error - Low Power of 50 mW/Amplifier (5mA)
- High Speed and Fast Settling
260MHz, -3dB Bandwidth
750 V/µs Slew Rate (2 V Step), 800 V/µs 4 V Step)
40 ns Settling Time to 0.1% (2V Step) - Low Distortion of -65dBc THD, fc=5MHz
- High Output Drive of Over 70mA
Product Details
The AD8079 is a dual, low power, high speed buffer designed to operate on ±5 V supplies. The AD8079's pinout offers excellent input and output isolation compared to the traditional dual amplifier pin configuration. With two ac ground pins separating both the inputs and outputs, the AD8079 achieves very low crosstalk of less than -70 dB at 5 MHz.
Additionally, the AD8079 contains gain setting resistors factory set at G = +2.0 (A grade) or Gain = +2.2 (B grade) allowing circuit configurations with minimal external components. The B grade gain of +2.2 compensates for gain loss through a system by providing a single-point trim. Using active laser trimming of these resistors, the AD8079 guarantees tight control of gain and channel-channel gain matching. With its performance and figuration, the AD8079 is well suited for driving differential cables and transformers. Its low distortion and fast settling are ideal for buffering high speed dual or differential A-to-D converters.
The AD8079 features a unique transimpedance linearization circuitry. This allows it to drive video loads with excellent differential gain and phase performance of 0.01% and 0.02° on only 50 mW of power per amplifier. It features gain flatness of 0.1 dB to 50 MHz. This makes the AD8079 ideal for professional video electronics such as cameras and video switchers.
The AD8079 offers low power of 5 mA/amplifier (VS = ±5 V) and can run on a single +12 V power supply while delivering over 70 mA of load current. All of this is offered in a small 8-pin SOIC package. These features make this amplifier ideal for portable and battery powered applications where size and power are critical.
The outstanding bandwidth of 260 MHz along with 800 V/µs of slew rate make the AD8079 useful in many general purpose high speed applications where dual power supplies of ±3 V to ±6 V are required.
The AD8079 is available in the industrial temperature range of -40°C to +85°C.
Product Lifecycle
Production
At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.
Documentation & Resources
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AN-402: Replacing Output Clamping Op Amps with Input Clamping Amps2/14/2015PDF55 kB
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AN-581: Biasing and Decoupling Op Amps in Single Supply Applications (Rev. 0)2/14/2015PDF166 kB
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AN-356: User's Guide to Applying and Measuring Operational Amplifier Specifications2/14/2015PDF538 kB
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MT-053: Op Amp Distortion: HD, THD, THD + N, IMD, SFDR, MTPR2/14/2015PDF104 kB
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MT-052: Op Amp Noise Figure: Don't Be Misled2/14/2015PDF60 kB
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MT-050: Op Amp Total Output Noise Calculations for Second-Order System2/14/2015PDF38 kB
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MT-049: Op Amp Total Output Noise Calculations for Single-Pole System2/14/2015PDF40 kB
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MT-048: Op Amp Noise Relationships: 1/f Noise, RMS Noise, and Equivalent Noise Bandwidth2/14/2015PDF81 kB
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MT-047: Op Amp Noise2/14/2015PDF72 kB
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MT-060: Choosing Between Voltage Feedback and Current Feedback Op Amps2/14/2015PDF62 kB
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MT-059: Compensating for the Effects of Input Capacitance on VFB and CFB Op Amps Used in Current-to-Voltage Converters2/14/2015PDF69 kB
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MT-033: Voltage Feedback Op Amp Gain and Bandwidth2/14/2015PDF251 kB
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MT-058: Effects of Feedback Capacitance on VFB and CFB Op Amps2/14/2015PDF66 kB
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MT-056: High Speed Voltage Feedback Op Amps2/3/2009PDF109 kB
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MT-032: Ideal Voltage Feedback (VFB) Op Amp12/11/2008PDF65 kB
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High Speed Amplifiers Selection Table2/27/2008PDF77 kB
Tools & Simulations
Design Tools
VRMS/dBm/dBu/dBV calculators
A utility to convert between standard units of power measurement and signal strength.
Power Dissipation vs Die Temp
This tool estimates die temperature and power dissipation based on the supply voltages, ambient temperature, load characteristics, and package thermal data.
Design Resources
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal.View our quality and reliability program and certifications for more information.
| Part Number | Material Declaration | Reliability Data | Pin/Package Drawing | CAD Symbols, Footprints & 3D Models |
|---|---|---|---|---|
| AD8079ARZ | Material Declaration | Reliability Data | 8-Lead SOIC | |
| AD8079ARZ-REEL | Material Declaration | Reliability Data | 8-Lead SOIC | |
| AD8079ARZ-REEL7 | Material Declaration | Reliability Data | 8-Lead SOIC | |
| AD8079BRZ | Material Declaration | Reliability Data | 8-Lead SOIC | |
| AD8079BRZ-REEL | Material Declaration | Reliability Data | 8-Lead SOIC | |
| AD8079BRZ-REEL7 | Material Declaration | Reliability Data | 8-Lead SOIC | |
| Wafer Fabrication Data |
PCN-PDN Information
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Support & Discussions
AD8079 Discussions
Sample & Buy
Ordering FAQs
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Buy Now Pricing
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Lead Times
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Sampling
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