GENERAL DESCRIPTION:

The ADA4817-1 (single) and ADA4817-2 (dual) FastFET™ amplifiers are unity-gain stable, ultrahigh speed, voltage feedback amplifiers with FET inputs. These amplifiers were developed with theAnalog Devices, Inc., proprietary eXtra fast complementary bipolar(XFCB) process, which allows the amplifiers to achieve ultralownoise (4 nV/√Hz; 2.5 fA/√Hz) as well as very high input impedances.With 1.3 pF of input capacitance, low noise (4 nV/√Hz), low offsetvoltage (2 mV maximum), and 1050 MHz −3 dB bandwidth, theADA4817-1/ADA4817-2 are ideal for data acquisition front ends aswell as wideband transimpedance applications, such as photodiodepreamps.With a wide supply voltage range from 5 V to 10 V and theability to operate on either single or dual supplies, the ADA4817-1/ADA4817-2 are designed to work in a variety of applications including active filtering and analog-to-digital converter (ADC) driving.The ADA4817-1 is available in a 3 mm × 3 mm, 8-lead LFCSP and8-lead SOIC, and the ADA4817-2 is available in a 4 mm × 4 mm,16-lead LFCSP. These packages feature a low distortion pinout thatimproves second harmonic distortion and simplifies circuit boardlayout. They also feature an exposed pad that provides a lowthermal resistance path to the printed circuit board (PCB). TheEPAD enables more efficient heat transfer and increases reliability.These products are rated to work over the extended industrialtemperature range (−40°C to +105°C).

FEATURES:

► High speed

► −3 dB bandwidth (G = 1, RL = 100 Ω): 1050 MHz

► Slew rate: 870 V/µs

► 0.1% settling time: 9 ns

► Input bias current: 2 pA typical

► Input capacitance

► Common-mode capacitance: 1.3 pF typical

► Differential mode capacitance: 0.1 pF typical

► Low input noise

► Voltage noise: 4 nV/√Hz at 100 kHz

► Current noise: 2.5 fA/√Hz at 100 kHz

► Low distortion: −90 dBc at 10 MHz (G = 1, RL = 1 kΩ)

► Linear output current: 40 mA

► Supply quiescent current per amplifier: 19 mA typical

► Powered down supply quiescent current per amplifier: 1.5 mAtypical

APPLICATIONS:

► Photodiode amplifiers

► Data acquisition front ends

► Instrumentation

► Filters

► ADC drivers

► Output buffers