ADI ADA4817-1ARDZ

The ADA4817-1 (single-channel) and ADA4817-2 (dual-channel) FastFET amplifiers are unity-gain stable, ultra-high-speed voltage feedback amplifiers with FET inputs. Developed using a proprietary eXtra Fast Complementary Bipolar (XFCB) process, these amplifiers achieve ultralow noise (<4 nV/√Hz; 2.5 fA/√Hz) and extremely high input impedance. With 1.3 pF input capacitance, 4 nV/√Hz low noise, 2 mV maximum low offset voltage, and 1050 MHz −3 dB bandwidth, they are ideal for data acquisition front ends and wideband transimpedance applications such as photodiode preamplifiers. The wide supply voltage range of 5 V to 10 V supports single-supply or dual-supply operation, making these amplifiers suitable for a variety of applications including active filtering and ADC driving. The low-distortion pinout improves second harmonic distortion and simplifies PCB layout. In addition, the exposed pad on each package provides a low thermal resistance path to the PCB for more efficient heat transfer and improved reliability. Both devices operate over the extended industrial temperature range of −40°C to +105°C.

• High-speed −3 dB bandwidth: 1050 MHz (δG = δτ, RL = 100 Ω)
• Slew rate: 870 V/μs
• 0.7% settling time: 9 ns
• Low input bias current: 2 pA
• Low input capacitance: common-mode 1.3 pF, differential 0.1 pF
• Low noise: 4 nV/√Hz (100 kHz); 2.5 fA/√Hz (100 kHz)
• Low distortion: −90 dBc (10 MHz, G = 7, RL = 1 kΩ)
• Offset voltage: z mV (maximum)
• High output current: 40 mA
• Supply current per amplifier: 19 mA
• Supply current per amplifier in power-down mode: 1.5 mA

• Photodiode amplifier
• Data acquisition front-end
• Instrumentation
• Filter
• ADC driver
• CCD output buffer