High Performance, 145 MHz
FastFET™
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 maximum
High common-mode rejection ratio: −100 dB
Excellent distortion specifications
SFDR −88 dBc @ 1 MHz
Low power: 6.4 mA/amplifier typical supply current
No phase reversal
Small packaging: SOIC-8, SOT-23-5, and MSOP-8
APPLICATIONS
Instrumentation
Photodiode preamps
Filters
A/D drivers
Level shifting
Buffering
CONNECTION DIAGRAMS
V
OUT 1
–V
S 2
+IN
3
4
AD8065
5
+V
S
NC
1
–IN
2
AD8065
8
7
6
NC
+V
S
V
OUT
TOP VIEW
(Not to Scale)
–IN
+IN
3
–V
S 4
TOP VIEW
5
NC
(Not to Scale)
AD8066
V
OUT1 1
–IN1
2
+IN1
3
–V
S 4
TOP VIEW
(Not to Scale)
8
7
6
5
+V
S
V
OUT2
–IN2
+IN2
02916-E-001
Figure 1.
GENERAL DESCRIPTION
The AD8065/AD8066
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 dBc @ 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
1
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.
24
21
18
15
GAIN (dB)
G = +10
V
O
= 200mV p-p
G = +5
12
9
G = +2
6
3
G = +1
0
–3
02916-E-002
–6
0.1
1
10
FREQUENCY (MHz)
100
1000
Figure 2. Small Signal Frequency Response
Protected by U. S. Patent No. 6,262,633.
Rev. G
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.
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Tel: 781.329.4700
www.analog.com
Fax: 781.461.3113
© 2006 Analog Devices, Inc. All rights reserved.
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