
High Performance, 145 MHz
Fast
FET Op Amps
AD8065/AD8066
FEATURES
FET input amplifier
1 pA input bias current
Low cost
High speed: 145 MHz, 3 dB bandwidth (G = +1)
180 V/μs slew rate (G = +2)
Low noise
7 nV/√Hz (f = 10 kHz)
0.6 fA/√Hz (f = 10 kHz)
Wide supply voltage range: 5 V to 24 V
Single-supply and rail-to-rail output
Low offset voltage 1.5 mV max
High common-mode rejection ratio: 100 dB
Excellent distortion specifications
SFDR 88 dB @ 1 MHz
Low power: 6.4 mA/amplifier typical supply current
No phase reversal
Small packaging: SOIC-8, SOT-23-5, and MSOP
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
registered trademarks are the property of their respective owners.
Tel: 781.329.4700Fax: 781.326.8703
APPLICATIONS Instrumentation
Photodiode preamps
Filters
A/D drivers
Level shifting
Buffering
CONNECTION DIAGRAMS
1
2
3
5
4
1
4
3
5
2
7
8
6
8
7
6
5
1
2
3
4
V
OUT
V
OUT1
V
OUT2
V
OUT
–V
S
–V
S
–V
S
+IN
+V
S
+V
S
+V
S
–IN
–IN1
+IN1
–IN2
+IN2
NC
–IN
+IN
NC
NC
TOP VIEW
(Not to Scale)
TOP VIEW
(Not to Scale)
(TOP VIEW
AD8065
AD8066
AD8065
0
Figure 1.
GENERAL DESCRIPTION
The AD8065/AD8066
1
FastFET amplifiers are voltage feedback
amplifiers with FET inputs offering high performance and ease
of use. The AD8065 is a single amplifier, and the AD8066 is a
dual amplifier. These amplifiers are developed in the Analog
Devices, Inc. proprietary XFCB process and allow exceptionally
low noise operation (7.0 nV/√Hz and 0.6 fA/
√
Hz) as well as
very high input impedance.
With a wide supply voltage range from 5 V to 24 V, the ability to
operate on single supplies, and a bandwidth of 145 MHz, the
AD8065/AD8066 are designed to work in a variety of
applications. For added versatility, the amplifiers also contain
rail-to-rail outputs.
Despite the low cost, the amplifiers provide excellent overall
performance. The differential gain and phase errors of 0.02%
and 0.02°, respectively, along with 0.1 dB flatness out to 7 MHz,
make these amplifiers ideal for video applications. Additionally,
they offer a high slew rate of 180 V/μs, excellent distortion
(SFDR of 88 dB @ 1 MHz), extremely high common-mode
rejection of 100 dB, and a low input offset voltage of 1.5 mV
maximum under warmed up conditions. The AD8065/AD8066
operate using only a 6.4 mA/amplifier typical supply current
and are capable of delivering up to 30 mA of load current.
The AD8065/AD8066 are high performance, high speed,
FET input amplifiers available in small packages: SOIC-8,
MSOP-8, and SOT-23-5. They are rated to work over the
industrial temperature range of 40°C to +85°C.
–6
–3
0
3
6
9
12
15
18
21
24
G
FREQUENCY (MHz)
1
0.1
10
100
1000
0
G = +10
V
O
= 200mV p-p
G = +5
G = +2
G = +1
Figure 2. Small Signal Frequency Response
1
Protected by U. S. Patent No. 6,262,633.