Overview
The AD8079ARZ from Analog Devices Inc. is a dual, low-power, high-speed buffer amplifier designed to operate on ±5 V power supplies. This component is renowned for its excellent input and output isolation, making it suitable for a variety of high-speed applications. The AD8079 features factory-set gains of +2.0 and +2.2, which help minimize external components and compensate for system gain loss. Its compact 8-pin SOIC package and low power consumption of 50 mW per amplifier make it ideal for portable and battery-powered applications.
Key Specifications
| Parameter | Value |
|---|---|
| Gain | +2.0 (AD8079A), +2.2 (AD8079B) |
| Bandwidth | 260 MHz, –3 dB |
| Slew Rate | 750 V/μs (2 V step), 800 V/μs (4 V step) |
| Settling Time | 40 ns to 0.1% (2 V step) |
| Power Supply Range | ±3.0 V to ±6.0 V |
| Quiescent Current | 10.0 mA to 11.5 mA (both amplifiers) |
| Output Current | 70 mA |
| Output Voltage Swing | ±2.7 V to ±3.1 V (RL = 150 Ω) |
| Crosstalk | < –70 dB at 5 MHz |
| Operating Temperature Range | –40°C to +85°C |
Key Features
- Factory-set gains of +2.0 and +2.2 to minimize external components and compensate for system gain loss.
- Tight control of gain and channel-channel gain matching (0.1%).
- Low crosstalk of less than –70 dB at 5 MHz.
- Excellent video specifications: 0.01% differential gain error, 0.02° differential phase error.
- High speed and fast settling: 260 MHz bandwidth, 750 V/μs slew rate.
- Low power consumption: 50 mW per amplifier.
- High output drive: over 70 mA, capable of driving up to 8 back-terminated 75 Ω loads.
- Compact 8-pin SOIC package.
Applications
The AD8079 is well-suited for various high-speed applications, including:
- Driving differential cables and transformers.
- Buffering high-speed dual or differential A-to-D converters.
- Professional video electronics such as cameras and video switchers.
- Portable and battery-powered applications where size and power are critical.
- General-purpose high-speed applications requiring dual power supplies.
Q & A
- What is the typical gain of the AD8079? The AD8079 has factory-set gains of +2.0 (AD8079A) and +2.2 (AD8079B).
- What is the bandwidth of the AD8079? The bandwidth is 260 MHz, –3 dB.
- What is the slew rate of the AD8079? The slew rate is 750 V/μs for a 2 V step and 800 V/μs for a 4 V step.
- How long does it take for the AD8079 to settle to 0.1%? The settling time is 40 ns to 0.1% for a 2 V step.
- What is the power supply range for the AD8079? The power supply range is ±3.0 V to ±6.0 V.
- What is the quiescent current of the AD8079? The quiescent current is 10.0 mA to 11.5 mA for both amplifiers.
- What is the maximum output current of the AD8079? The maximum output current is 70 mA.
- What is the crosstalk performance of the AD8079? The crosstalk is less than –70 dB at 5 MHz.
- What are the typical applications of the AD8079? Typical applications include driving differential cables and transformers, buffering high-speed A-to-D converters, professional video electronics, and portable/battery-powered applications.
- What is the operating temperature range of the AD8079? The operating temperature range is –40°C to +85°C.
