Overview
The AD8079AR-REEL7, produced by Analog Devices Inc., is a dual, low-power, high-speed buffer amplifier. This component is designed to operate on ±5 V supplies and is ideal for professional video electronics, such as cameras and video switchers. The AD8079 offers excellent input and output isolation, low power consumption of 5 mA per amplifier, and the ability to drive up to 8 back-terminated 75 Ω loads while maintaining good differential gain and phase performance. It is available in a small 8-pin SOIC package, making it suitable for portable and battery-powered applications where size and power are critical.
Key Specifications
| Parameter | Min | Max | Unit | |
|---|---|---|---|---|
| Supply Voltage | ±3.0 | ±6.0 | V | |
| Quiescent Current/Both Amplifiers | 10.0 | 11.5 | mA | |
| Bandwidth (–3 dB) | 260 | MHz | ||
| Slew Rate (2 V Step) | 750 | V/μs | ||
| Settling Time to 0.1% (2 V Step) | 40 | ns | ||
| Differential Gain Error | 0.01% | |||
| Differential Phase Error | 0.02° | |||
| Output Current | 70 | mA | ||
| Operating Temperature Range | –40 | +85 | °C |
Key Features
- Factory set gain: AD8079A (Gain = +2.0, +1.0, –1.0) and AD8079B (Gain = +2.2, +1, –1.2)
- Tight control of gain and gain matching (0.1%)
- Optimum dual pinout simplifies PCB layout
- Low crosstalk of –70 dB @ 5 MHz
- Excellent video specifications: gain flatness 0.1 dB to 50 MHz, low distortion of –65 dBc THD at 5 MHz
- High output drive capability: over 70 mA, drives up to 8 back-terminated 75 Ω loads
- High ESD tolerance (5 kV)
- Low power consumption: 50 mW per amplifier
- High speed and fast settling time: 260 MHz bandwidth, 750 V/μs slew rate
Applications
- Differential A-to-D driver
- Video line driver
- Differential line driver
- Professional cameras
- Video switchers
- Special effects equipment
- RF receivers
Q & A
- What is the typical bandwidth of the AD8079?
The AD8079 has a typical bandwidth of 260 MHz.
- What are the available gain settings for the AD8079?
The AD8079A offers gains of +2.0, +1.0, and –1.0, while the AD8079B offers gains of +2.2, +1, and –1.2.
- What is the power consumption per amplifier?
The power consumption per amplifier is 50 mW (5 mA at ±5 V supplies).
- What is the maximum output current of the AD8079?
The maximum output current is over 70 mA.
- What is the operating temperature range of the AD8079?
The operating temperature range is –40°C to +85°C.
- 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 many back-terminated 75 Ω loads can the AD8079 drive?
The AD8079 can drive up to 8 back-terminated 75 Ω loads.
- What is the crosstalk performance of the AD8079?
The crosstalk is –70 dB at 5 MHz.
- What is the differential gain error of the AD8079?
The differential gain error is 0.01%.
- What is the ESD tolerance of the AD8079?
The AD8079 has a high ESD tolerance of 5 kV.
