ADI AD811ANZ

A wideband current feedback operational amplifier, the AD811 is optimized for broadcast-quality video systems. The -3dB bandwidth of 120MHz at a gain of +2 and the differential gain and phase of 0.01% and 0.01° (RL = 150Ω) make the AD811 an excellent choice for all video systems. The AD811 is designed to meet a stringent 0.1dB gain flatness specification to a bandwidth of 35MHz (G = +2) in addition to low differential gain and phase errors. This performance is achieved whether driving one or two back-terminated 75Ω cables, with a low power supply current of 16.5mA. Furthermore, the AD811 is specified over a power supply range of ±4.5V to ±18V.

The AD811 is also excellent for pulsed applications where transient response is critical. It can achieve a maximum slew rate of greater than 2500V/μs with a settling time of less than 25 ns to 0.1% on a 2V step and 65 ns to 0.01% on a 10V step.

The AD811 is ideal as an ADC or DAC buffer in data acquisition systems due to its low distortion up to 10MHz and its wide unity gain bandwidth. Because the AD811 is a current feedback amplifier, this bandwidth can be maintained over a wide range of gains. The AD811 also offers low voltage and current noise of 1.9nV/√Hz and 20pA/√Hz, respectively, and excellent dc accuracy for wide dynamic range applications.

• High speed 140 MHz bandwidth (3 dB, G = +1)
• 120 MHz bandwidth (3 dB, G = +2)
• 35 MHz bandwidth (0.1 dB, G = +2)
• 2500 V/ps slew rate
• 25 ns settling time to 0.1% (for a 2 V step)
• 65 ns settling time to 0.01% (for a 10 V step)
• Excellent video performance (RL = 150Ω)
• 0.01% differential gain, 0.01° differential phase
• Voltage noise of 1.9nV/√Hz
• Low distortion: THD = - 74 dB at 10 MHz
• Excellent dc precision: 3 mV max input offset voltage
• Flexible operation
• Specified for ±5V and ±15V operation
• ±2.3V output swing into a 75Ω load (Vs = ±5V)

• Video crosspoint switchers
• Multimedia broadcast systems
• HDTV compatible systems
• Video line drivers
• Distribution amplifiers
• ADC/DAC buffers
• DC restoration circuits
• Medical Ultrasound
• PET Gamma Counter applications