Part Number: AD8002
Function: Dual 600 MHz, 50 mW Current Feedback Amplifier
Package: DIP, SOIC 8 Pin Type
Manufacturer: Analog Devices
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Description
The AD8002 is a dual, low-power, high-speed amplifier designed to operate on±5 V supplies. The AD-8002 features unique trans impedance linearization circuitry. This allows it to drive video loads with excellent differential gain and phase performance on only 50 mW of power per amplifier. The device is a current feedback amplifier and features gain flatness of 0.1 dB to 60 MHz while offering differential gain and phase error of 0.01% and 0.02°. This makes the AD-8002 ideal for professional video electronics such as cameras and video switchers. Additionally, the AD8002’s low distortion and fast settling make it ideal for buffer high-speed A-to-D converters.
The IC offers low power of 5.5 mA/amplifier max (VS=±5 V) and can run on a single 12 V power supply, while capable of delivering over 70 mA of load current. It is offered in an 8-lead plastic DIP, SOIC, and µSOIC package. These features make this amplifier ideal for portable and battery-powered applications where size and power are critical.
Features
- Dual high-speed current feedback amplifier
- Wide bandwidth with gain flatness: 0.1 dB up to 60 MHz
- Very high slew rate: 1200 V/µs
- Fast settling time: 16 ns (to 0.1%)
- Low distortion performance
- Excellent differential gain and phase accuracy (0.01% / 0.17°)
- High output drive capability: >70 mA
- Low power consumption: ~5.5 mA per amplifier
- Operates on ±5V or single 12V supply
- Available in DIP, SOIC, and µSOIC packages
Pinouts
Architecture Insight (CFA vs VFA)
- Bandwidth is largely independent of gain (unlike voltage feedback amplifiers)
- Higher slew rate due to current-mode internal nodes
- Feedback resistor (RF) value is critical for stability and performance
- Optimized for wideband, high-speed signal paths
Design Notes
- Carefully select feedback resistor (RF) as per datasheet for stability
- Use controlled impedance PCB layout for high-frequency signals
- Minimize parasitic capacitance at input nodes to preserve bandwidth
- Proper termination (e.g., 50Ω or 75Ω) is required for video applications
- Decoupling capacitors must be placed close to supply pins
- Thermal considerations are minimal due to low power but important at high drive currents
Advantages
- Excellent high-frequency linearity
- Very fast transient response
- Capable of driving low impedance loads directly
- Low power consumption for portable applications
- Dual amplifier reduces component count
Typical Applications
- High-speed ADC driver circuits
- Video line drivers (broadcast and professional video)
- Differential signal drivers
- RF front-end buffering
- Video switchers and multiplexers
- Imaging systems (cameras, processing units)
- Special effects and signal processing chains
Alternative / Equivalent Products
- AD8001 – Single version of high-speed CFA
- AD812 – High-speed video amplifier
- LMH6702 – TI ultra-high-speed amplifier
- THS3202 – TI dual current feedback amplifier
- OPA695 – Wideband current feedback amplifier
Other data sheets are available within the file:
AD8002AN, AD8002AR, AD8002AR-REEL, AD8002AR-REEL7
AD8002 Datasheet PDF Download
