Precision, Very Low Noise,
Low Input Bias Current, Wide
Bandwidth JFET Operational Amplifier
AD8610/AD8620
PIN CONFIGURATIONS
FEATURES
Low noise: 6 nV/√Hz
NULL
–IN
1
2
3
4
8
7
6
5
NC
Low offset voltage: 100 μV maximum
Low input bias current: 10 pA maximum
Fast settling: 600 ns to 0.01%
Low distortion
V+
AD8610
+IN
OUT
NULL
TOP VIEW
(Not to Scale)
V–
NC = NO CONNECT
Unity gain stable
Figure 1. AD8610 8-Lead MSOP and SOIC_N
No phase reversal
Dual-supply operation: ±± V to ±13 V
OUTA
–INA
+INA
V–
1
2
3
4
8
7
6
5
V+
OUTB
–INB
+INB
AD8620
APPLICATIONS
TOP VIEW
(Not to Scale)
Photodiode amplifier
ATE
Instrumentation
Figure 2.AD8620 8-Lead SOIC
Sensors and controls
High performance filters
Fast precision integrators
High performance audio
GENERAL DESCRIPTION
The AD8610/AD8620 are very high precision JFET input ampli-
fiers featuring ultralow offset voltage and drift, very low input
voltage and current noise, very low input bias current, and wide
bandwidth. Unlike many JFET amplifiers, the AD8610/AD8620
input bias current is low over the entire operating temperature
range. The AD8610/AD8620 are stable with capacitive loads of
over 1000 pF in noninverting unity gain; much larger capacitive
loads can be driven easily at higher noise gains. The AD8610/
AD8620 swing to within 1.2 V of the supplies even with a 1 kΩ
load, maximizing dynamic range even with limited supply volt-
ages. Outputs slew at 50 V/μs in either inverting or noninverting
gain configurations, and settle to 0.01% accuracy in less than
600 ns. Combined with high input impedance, great precision
and very high output drive, the AD8610/AD8620 are ideal
amplifiers for driving high performance ADC inputs and
buffering DAC converter outputs.
Applications for the AD8610/AD8620 include electronic instru-
ments; ATE amplification, buffering, and integrator circuits;
CAT/MRI/ultrasound medical instrumentation; instrumentation
quality photodiode amplification; fast precision filters (including
PLL filters); and high quality audio.
The AD8610/AD8620 are fully specified over the extended
industrial (−40°C to +125°C) temperature range. The AD8610
is available in the narrow 8-lead SOIC and the tiny 8-lead MSOP
surface-mount packages. The AD8620 is available in the narrow
8-lead SOIC package. 8-lead MSOP packaged devices are avail-
able only in tape and reel.
Rev. E
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other
rights of third parties that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarks and registeredtrademarks arethe property of their respective owners.
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©2006 Analog Devices, Inc. All rights reserved.
ADI [ ADI ]
