Document Outline
- FEATURES
- APPLICATIONS
- CONNECTION DIAGRAMS
- GENERAL DESCRIPTION
- TABLE OF CONTENTS
-
-
-
-
-
-
-
High Performance, 145 MHz
FastFETTM Op Amps
AD8065/AD8066
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.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
www.analog.com
Fax: 781.326.8703
2004 Analog Devices, Inc. All rights reserved.
FEATURES
FET input amplifier
1 pA input bias current
Low cost
High speed: 145 MHz, -3 dB bandwidth (G = +1)
180 V/s 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
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
(Not to Scale)
AD8065
AD8066
AD8065
02916-
E
-
001
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/s, 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 -40C to +85C.
6
3
0
3
6
9
12
15
18
21
24
GAIN (dB)
FREQUENCY (MHz)
1
0.1
10
100
1000
02916-
E
-
002
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.
AD8065/AD8066
Rev. E | Page 2 of 28
TABLE OF CONTENTS
Specifications..................................................................................... 3
Absolute Maximum Ratings............................................................ 6
ESD Caution.................................................................................. 6
Maximum Power Dissipation ..................................................... 7
Output Short Circuit .................................................................... 7
Typical Performance Characteristics ............................................. 8
Test Circuits..................................................................................... 15
Theory of Operation ...................................................................... 18
Closed-Loop Frequency Response........................................... 18
Noninverting Closed-Loop Frequency Response .................. 18
Inverting Closed-Loop Frequency Response ......................... 18
Wideband Operation ................................................................. 19
Input Protection.......................................................................... 19
Thermal Considerations............................................................ 20
Input and Output Overload Behavior...................................... 20
Layout, Grounding, and Bypassing Considerations................... 21
Power Supply Bypassing ............................................................ 21
Grounding ................................................................................... 21
Leakage Currents........................................................................ 22
Input Capacitance....................................................................... 22
Output Capacitance ................................................................... 22
Input-to-Output Coupling ........................................................ 23
Wideband Photodiode Preamp ................................................ 23
High Speed JFET Input Instrumentation Amplifier.............. 24
Video Buffer ................................................................................ 24
Outline Dimensions ....................................................................... 25
Ordering Guide........................................................................... 26
REVISION HISTORY
2/04--Data Sheet Changed from Rev. D to Rev. E.
Updated Format.................................................................Universal
Updated Figure 56 ......................................................................... 21
Updated Outline Dimensions...................................................... 25
Updated Ordering Guide.............................................................. 26
11/03--Data Sheet changed from Rev. C to Rev. D.
Changes to Features ........................................................................ 1
Changes to Connection Diagrams ................................................ 1
Updated Ordering Guide................................................................ 5
Updated Outline Dimensions...................................................... 22
4/03--Data Sheet changed from Rev. B to Rev. C.
Added SOIC-8 (R) for the AD8065............................................... 4
2/03--Data Sheet changed from Rev. A to Rev. B.
Changes to Absolute Maximum Ratings ...................................... 4
Changes to Test Circuit 10 ........................................................... 14
Changes to Test Circuit 11 ........................................................... 15
Changes to Noninverting Closed-Loop Frequency Response 16
Changes to Inverting Closed-Loop Frequency Response ....... 16
Updated Figure 6 .......................................................................... 18
Changes to Figure 7....................................................................... 19
Changes to Figures 10 ................................................................... 21
Changes to Figure 11..................................................................... 22
Changes to High Speed JFET Instrumentation Amplifier....... 22
Changes to Video Buffer............................................................... 22
8/02--Data Sheet changed from Rev. 0 to Rev. A.
Added AD8066 ..................................................................Universal
Added SOIC-8 (R) and MSOP-8 (RM) ........................................ 1
Edits to General Description ......................................................... 1
Edits to Specifications ..................................................................... 2
New Figure 2 .................................................................................... 5
Changes to Ordering Guide ........................................................... 5
Edits to TPCs 18, 25, and 28........................................................... 8
New TPC 36 ................................................................................... 11
Added Test Circuits 10 and 11..................................................... 14
MSOP (RM-8) added.................................................................... 23
AD8065/AD8066
Rev. E | Page 3 of 28
SPECIFICATIONS
@ T
A
= 25C, V
S
= 5 V, R
L
= 1 k, unless otherwise noted.
Table 1.
Parameter Conditions Min
Typ
Max
Unit
DYNAMIC
PERFORMANCE
-3 dB Bandwidth
G = +1, V
O
= 0.2 V p-p (AD8065)
100
145
MHz
G = +1, V
O
= 0.2 V p-p (AD8066)
100
120
MHz
G = +2, V
O
= 0.2 V p-p
50
MHz
G = +2, V
O
= 2 V p-p
42
MHz
Bandwidth for 0.1 dB Flatness
G = +2, V
O
= 0.2 V p-p
7
MHz
Input Overdrive Recovery Time
G = +1, -5.5 V to +5.5 V
175
ns
Output Recovery Time
G = -1, -5.5 V to +5.5 V
170
ns
Slew Rate
G = +2, V
O
= 4 V Step
130
180
V/s
Settling Time to 0.1%
G = +2, V
O
= 2 V Step
55
ns
G = +2, V
O
= 8 V Step
205
ns
NOISE/HARMONIC
PERFORMANCE
SFDR f
C
= 1 MHz, G = +2, V
O
= 2 V p-p
-88
dBc
f
C
= 5 MHz, G = +2, V
O
= 2 V p-p
-67
dBc
f
C
= 1 MHz, G = +2, V
O
= 8 V p-p
-73
dBc
Third-Order Intercept
f
C
= 10 MHz, R
L
= 100
24
dBm
Input Voltage Noise
f = 10 kHz
7
nV/Hz
Input Current Noise
f = 10 kHz
0.6
fA/Hz
Differential Gain Error
NTSC, G = +2, R
L
= 150
0.02
%
Differential Phase Error
NTSC, G = +2, R
L
= 150
0.02
Degree
DC
PERFORMANCE
Input Offset Voltage
V
CM
= 0 V, SOIC Package
0.4
1.5
mV
Input Offset Voltage Drift
1
17
V/C
Input Bias Current
SOIC Package
2
6
pA
T
MIN
to T
MAX
25
pA
Input Offset Current
1
10
pA
T
MIN
to T
MAX
1
pA
Open-Loop Gain
V
O
= 3 V, R
L
= 1 k
100
113
dB
INPUT
CHARACTERISTICS
Common-Mode Input Impedance
1000 || 2.1
G || pF
Differential Input Impedance
1000 || 4.5
G || pF
Input Common-Mode Voltage Range
FET Input Range
-5 to +1.7
-5.0 to +2.4
V
Usable Range
See the Theory of Operation section
-5.0 to +5.0
V
Common-Mode Rejection Ratio
V
CM
= -1 V to +1 V
-85
-100
dB
V
CM
= -1 V to +1 V (SOT-23)
-82
-91
dB
OUTPUT
CHARACTERISTICS
Output Voltage Swing
R
L
= 1 k
-4.88 to +4.90
-4.94 to +4.95
V
R
L
= 150
-4.8 to +4.7
V
Output Current
V
O
= 9 V p-p, SFDR -60 dBc, f = 500 kHz
35
mA
Short-Circuit Current
90
mA
Capacitive Load Drive
30% Overshoot G = +1
20
pF
POWER
SUPPLY
Operating Range
5
24
V
Quiescent Current per Amplifier
6.4
7.2
mA
Power Supply Rejection Ratio
PSRR
-85
-100
dB
AD8065/AD8066
Rev. E | Page 4 of 28
@ T
A
= 25C, V
S
= 12 V, R
L
= 1 k, unless otherwise noted.
Table 2.
Parameter Conditions
Min
Typ
Max
Unit
DYNAMIC PERFORMANCE
MHz
-3 dB Bandwidth
G = +1, V
O
= 0.2 V p-p (AD8065)
100
145
MHz
G = +1, V
O
= 0.2 V p-p (AD8066)
100
115
MHz
G = +2, V
O
= 0.2 V p-p
50
MHz
G = +2, V
O
= 2 V p-p
40
MHz
Bandwidth for 0.1 dB Flatness
G = +2, V
O
= 0.2 V p-p
7
MHz
Input Overdrive Recovery
G = +1, -12.5 V to +12.5 V
175
ns
Output Overdrive Recovery
G = -1, -12.5 V to +12.5 V
170
ns
Slew Rate
G = +2, V
O
= 4 V Step
130
180
V/s
Settling Time to 0.1%
G = +2, V
O
= 2 V Step
55
ns
G = +2, V
O
= 10 V Step
250
ns
NOISE/HARMONIC PERFORMANCE
SFDR f
C
= 1 MHz, G = +2, V
O
= 2 V p-p
-100
dBc
f
C
= 5 MHz, G = +2, V
O
= 2 V p-p
-67
dBc
f
C
= 1 MHz, G = +2, V
O
= 10 V p-p
-85
dBc
Third-Order Intercept
f
C
= 10 MHz, R
L
= 100
24
dBm
Input Voltage Noise
f = 10 kHz
7
nV/Hz
Input Current Noise
f = 10 kHz
1
fA/Hz
Differential Gain Error
NTSC, G = +2, R
L
= 150
0.04
%
Differential Phase Error
NTSC, G = +2, R
L
= 150
0.03
Degree
DC PERFORMANCE
Input Offset Voltage
V
CM
= 0 V, SOIC Package
0.4
1.5
mV
Input Offset Voltage Drift
1
17
V/C
Input Bias Current
SOIC Package
3
7
pA
T
MIN
to T
MAX
25
pA
Input Offset Current
2
10
pA
T
MIN
to T
MAX
2
pA
Open-Loop Gain
V
O
= 10 V, R
L
= 1 k
103
114
dB
INPUT CHARACTERISTICS
Common-Mode Input Impedance
1000 || 2.1
G || pF
Differential Input Impedance
1000 || 4.5
G || pF
Input Common-Mode Voltage Range
FET Input Range
-12 to +8.5
-12.0 to +9.5
V
Usable Range
See the Theory of Operation section
-12.0 to +12.0
V
Common-Mode Rejection Ratio
V
CM
= -1 V to +1 V
-85
-100
dB
V
CM
= -1 V to +1 V (SOT-23)
-82
-91
dB
OUTPUT CHARACTERISTICS
Output Voltage Swing
R
L
= 1 k
-11.8 to +11.8
-11.9 to +11.9
V
R
L
= 350
-11.25 to +11.5
V
Output Current
V
O
= 22 V p-p, SFDR -60 dBc, f = 500 kHz
30
mA
Short-Circuit Current
120
mA
Capacitive Load Drive
30% Overshoot G = +1
25
pF
POWER SUPPLY
Operating Range
5
24
V
Quiescent Current per Amplifier
6.6
7.4
mA
Power Supply Rejection Ratio
PSRR
-84
-93
dB
AD8065/AD8066
Rev. E | Page 5 of 28
@ T
A
= 25C, V
S
= 5 V, R
L
= 1 k, unless otherwise noted.
Table 3.
Parameter Conditions Min
Typ
Max
Unit
DYNAMIC PERFORMANCE
-3 dB Bandwidth
G = +1, V
O
= 0.2 V p-p (AD8065)
125
155
MHz
G = +1, V
O
= 0.2 V p-p (AD8066)
110
130
MHz
G = +2, V
O
= 0.2 V p-p
50
MHz
G = +2, V
O
= 2 V p-p
43
MHz
Bandwidth for 0.1 dB Flatness
G = +2, V
O
= 0.2 V p-p
6
MHz
Input Overdrive Recovery Time
G = +1, -0.5 V to +5.5 V
175
ns
Output Recovery Time
G = -1, -0.5 V to +5.5 V
170
ns
Slew Rate
G = +2, V
O
= 2 V Step
105
160
V/s
Settling Time to 0.1%
G = +2, V
O
= 2 V Step
60
ns
NOISE/HARMONIC PERFORMANCE
SFDR f
C
= 1 MHz, G = +2, V
O
= 2 V p-p
-65
dBc
f
C
= 5 MHz, G = +2, V
O
= 2 V p-p
-50
dBc
Third-Order Intercept
f
C
= 10 MHz, R
L
= 100
22
dBm
Input Voltage Noise
f = 10 kHz
7
nV/Hz
Input Current Noise
f = 10 kHz
0.6
fA/Hz
Differential Gain Error
NTSC, G = +2, R
L
= 150
0.13
%
Differential Phase Error
NTSC, G = +2, R
L
= 150
0.16
Degree
DC PERFORMANCE
Input Offset Voltage
V
CM
= 1.0 V, SOIC Package
0.4
1.5
mV
Input Offset Voltage Drift
1
17
V/C
Input Bias Current
SOIC Package
1
5
pA
T
MIN
to T
MAX
25
pA
Input Offset Current
1
5
pA
T
MIN
to T
MAX
1
pA
Open-Loop Gain
V
O
= 1 V to 4 V (AD8065)
100
113
dB
V
O
= 1 V to 4 V (AD8066)
90
103
dB
INPUT CHARACTERISTICS
Common-Mode Input Impedance
1000 || 2.1
G || pF
Differential Input Impedance
1000 || 4.5
G || pF
Input Common-Mode Voltage Range
FET Input Range
0 to 1.7
0 to 2.4
V
Usable Range
See the Theory of Operation section
0 to 5.0
V
Common-Mode Rejection Ratio
V
CM
= 1 V to 4 V
-74
-100
dB
V
CM
= 1 V to 2 V (SOT-23)
-78
-91
dB
OUTPUT CHARACTERISTICS
Output Voltage Swing
R
L
= 1 k
0.1 to 4.85
0.03 to 4.95
V
R
L
= 150
0.07 to 4.83
V
Output Current
V
O
= 4 V p-p, SFDR -60 dBc, f = 500 kHz
35
mA
Short-Circuit Current
75
mA
Capacitive Load Drive
30% Overshoot G = +1
5
pF
POWER SUPPLY
Operating Range
5
24
V
Quiescent Current per Amplifier
5.8
6.4
7.0
mA
Power Supply Rejection Ratio
PSRR
-78
-100
dB
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