270 MH, 400A Current Feedback Amplifier

The AD8005 is an ultralow power, high speed amplifier with a wide signal bandwidth of 170 MHz and slew rate of 280 V/µs. This performance is achieved while consuming only 400 µA of quiescent supply current. These features increase the operating time of high speed battery-powered systems without reducing dynamic performance.

The current feedback design results in gain flatness of 0.1 dB to 30 MHz while offering differential gain and phase errors of 0.11% and 0.4°. Harmonic distortion is low over a wide bandwidth with THDs of –63 dBc at 1 MHz and –50 dBc at 10 MHz. Ideal features for a signal conditioning amplifier or buffer to a high speed A-to-D converter in portable video, medical or communication systems.

The AD8005 is characterized for +5 V and ±5 V supplies and will operate over the industrial temperature range of –40°C to +85°C. The amplifier is supplied in 8-pin DIP, 8-pin SOIC & 5-pin SOT-23 packages.

Applications

* Signal conditioning

* A/D buffer

* Power sensitive, high speed systems

* Battery powered equipment

* Loop/remote power systems

* Communication or video test systems

* Portable medical instruments

* Low Distortion/Noise

–63 dBc @ 1 MHz, VO = 2 V p-p

–50 dBc @ 10 MHz, VO = 2 V p-p

4.0 nV/vHz Input Voltage Noise @ 10 MHz

* High Speed

270 MHz, –3 dB Bandwidth (G = +1)

170 MHz, –3 dB Bandwidth (G = +2)

280 V/µs Slew Rate (G = +2)

28 ns Settling Time to 0.1%, 2 V Step (G = +2)

* Ultralow Power

400 µA Power Supply Current

(4 mW on ± VS)

Specified for Single Supply Operation

* Good Video Specifications

(RL = 1 kΩ, G = +2)

Gain Flatness 0.1 dB to 30 MHz

0.11% Differential Gain Error

0.4° Differential Phase Error