ADA4817-1 Datasheet, PDF (1/24 Pages) Analog Devices – Low Noise, 1 GHz FastFET Op Amps

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: 1.5 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: 70 mA
Supply current per amplifier: 19 mA
Power-down supply current per amplifier: 1 mA
APPLICATIONS
Photodiode amplifiers
Data acquisition front ends
Instrumentation
Filters
ADC drivers
CCD output buffers
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 are
developed in 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 1.5 pF of input capacitance, low noise (4 nV/√Hz),
low offset voltage (2 mV maximum), and 1050 MHz −3 dB
bandwidth, the ADA4817-1/ADA4871-2 are ideal for data
acquisition front ends as well as wideband transimpedance
applications, such as photodiode preamps.
Low Noise, 1 GHz
FastFET Op Amps
ADA4817-1/ADA4817-2
CONNECTION DIAGRAMS
ADA4817-1
TOP VIEW
(Not to Scale)
PD 1
FB 2
–IN 3
+IN 4
8 +V_S
7 OUT
6 NC
5 –V_S
NC = NO CONNECT
Figure 1. 8-Lead ADA4817-1 LFCSP (CP-8-2)
ADA4817-2
TOP VIEW
(Not to Scale)
–IN1 1
+IN1 2
NC 3
–V_S2 4
12 –V_S1
11 NC
10 +IN2
9 –IN2
NC = NO CONNECT
Figure 2. 16-Lead ADA4817-2 LFSCP (CP-16-4)
With a wide supply voltage range from 5 V to 10 V, the ability
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 ADC driving.
The ADA4817-1 is available in a 3 mm × 3 mm 8-lead LFCSP
and the ADA4817-2 is available in a 4 mm × 4 mm 16-lead LFSCP.
Both packages feature a low distortion pinout, which improves
second harmonic distortion and simplifies the layout of the
circuit board. In addition, both packages feature an exposed
paddle that provides a low thermal resistance path to the
printed circuit board (PCB). This enables more efficient heat
transfer and increases reliability. Both products are rated to
work over the extended industrial temperature range (−40°C
to +105°C).
Rev. 0
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