低噪声， 1 GHz的FastFET运算放大器 Low Noise, 1 GHz FastFET Op Amps
GENERAL DESCRIPTION
The single and ADA4817-2 dual FastFET™ amplifiers are unity-gain stable, ultrahigh speed voltage feedback amplifiers with FET inputs. These amplifiers were developed with the Analog Devices, Inc., proprietary eXtra Fast Complementary Bipolar XFCB process, which allows the amplifiers to achieve ultralow noise 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 offset voltage 2 mV maximum, and 1050 MHz −3 dB band width, the ADA4817-1/ADA4871-2 are ideal for data acquisition front ends as well as wideband transimpedance applications, such as photodiode preamps.
FEATURES
High speed
−3 dB bandwidth G = 1, RL = 100 Ω: 1050 MHz Slew rate: 870 V/µs 0.1% settling time: 9 ns
Low input bias current: 2 pA
Low input capacitance
Common-mode capacitance: 1.3 pF
Differential-mode capacitance: 0.1 pF
Low noise
4 nV/√Hz @ 100 kHz
2.5 fA/√Hz @ 100 kHz
Low distortion
−90 dBc @ 10 MHz G = 1, RL = 1 kΩ
Offset voltage: 2 mV maximum
High output current: 40 mA
Supply current per amplifier: 19 mA
Power-down supply current per amplifier: 1.5 mA
APPLICATIONS
Photodiode amplifiers
Data acquisition front ends
Instrumentation
Filters
ADC drivers
CCD output buffers
