Overview
The AD8079AR, produced by Analog Devices Inc., is a dual, low power, high speed buffer amplifier. This component is designed to operate on dual power supplies ranging from ±3 V to ±6 V and can also run on a single +12 V power supply. The AD8079AR is housed in an 8-pin SOIC package, making it suitable for applications where size and power efficiency are critical.
The amplifier features factory-set gains of +2.0 and +2.2, which help minimize external components and compensate for system gain loss. It is particularly well-suited for professional video electronics, high-speed A-to-D converters, and other applications requiring low distortion and fast settling times.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Gain | +2.0, +2.2 (also +1.0, –1.0, –1.2) | - |
| -3 dB Bandwidth | 260 MHz | - |
| Slew Rate | 800 V/µs (2 V step), 750 V/µs (4 V step) | V/µs |
| Settling Time to 0.1% | 40 ns (2 V step) | ns |
| Output Current | 70 mA | mA |
| Short Circuit Current | 85-110 mA | mA |
| Power Supply Range | ±3 V to ±6 V, single +12 V | V |
| Quiescent Current per Amplifier | 5 mA | mA |
| Operating Temperature Range | -40°C to +85°C | °C |
| Package | 8-pin SOIC | - |
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 through active laser trimming.
- Low crosstalk of less than –70 dB at 5 MHz.
- Excellent video specifications, including 0.1 dB gain flatness to 50 MHz, 0.01% differential gain error, and 0.02° differential phase error.
- Low power consumption of 50 mW per amplifier.
- High speed performance with a bandwidth of 260 MHz and a slew rate of 800 V/µs.
- Low distortion of –65 dBc THD at 5 MHz.
- High output drive capability, driving up to 8 back-terminated 75 Ω loads.
- Compact 8-pin SOIC package suitable for portable and battery-powered applications.
Applications
- Professional video electronics such as cameras and video switchers.
- High-speed A-to-D converters and other high-speed buffering applications.
- Driving differential cables and transformers.
- Portable and battery-powered equipment where size and power are critical.
- General-purpose high-speed applications requiring dual power supplies.
Q & A
- What are the available gain settings for the AD8079AR?
The AD8079AR has factory-set gains of +2.0 and +2.2, with additional options for +1.0, –1.0, and –1.2.
- What is the bandwidth of the AD8079AR?
The AD8079AR has a bandwidth of 260 MHz.
- What is the slew rate of the AD8079AR?
The slew rate of the AD8079AR is 800 V/µs for a 2 V step and 750 V/µs for a 4 V step.
- How much current can the AD8079AR output?
The AD8079AR can output up to 70 mA per channel.
- What is the operating temperature range of the AD8079AR?
The operating temperature range is –40°C to +85°C.
- What type of package does the AD8079AR come in?
The AD8079AR is housed in an 8-pin SOIC package.
- What are some typical applications for the AD8079AR?
Typical applications include professional video electronics, high-speed A-to-D converters, and portable battery-powered equipment.
- How much power does the AD8079AR consume?
The AD8079AR consumes 50 mW of power per amplifier.
- What is the crosstalk performance of the AD8079AR?
The AD8079AR has a crosstalk of less than –70 dB at 5 MHz.
- Can the AD8079AR drive multiple video loads?
Yes, the AD8079AR can drive up to 8 back-terminated 75 Ω loads while maintaining good differential gain and phase performance.
