Low Cost, 80 MHz
FastFET Op Amps
AD8033/AD8034
CONNECTION DIAGRAMS
AD8033
8
NC
7
+VS
+IN 3
6
VOUT
–VS 4
5
NC
NC = NO CONNECT
AD8033
VOUT 1
5
+VS
4
–IN
–VS 2
+IN 3
Figure 1. 8-Lead SOIC (R)
02924-002
NC 1
–IN 2
02924-001
FET input amplifier
1 pA typical input bias current
Very low cost
High speed
80 MHz, −3 dB bandwidth (G = +1)
80 V/μs slew rate (G = +2)
Low noise
11 nV/√Hz (f = 100 kHz)
0.7 fA/√Hz (f = 100 kHz)
Wide supply voltage range: 5 V to 24 V
Low offset voltage: 1 mV typical
Single-supply and rail-to-rail output
High common-mode rejection ratio: −100 dB
Low power: 3.3 mA/amplifier typical supply current
No phase reversal
Small packaging: 8-lead SOIC, 8-lead SOT-23, and 5-lead SC70
Figure 2. 5-Lead SC70 (KS)
VOUT1 1
8
+VS
–IN1 2
7
VOUT2
+IN1 3
6
–IN2
–VS 4
5
+IN2
AD8034
02924-003
FEATURES
Figure 3. 8-Lead SOIC (R) and 8-Lead SOT-23 (RJ)
24
21
VOUT = 200mV p-p
G = +10
18
15
APPLICATIONS
12
GAIN (dB)
Instrumentation
Filters
Level shifting
Buffering
G = +5
9
6
G = +2
3
G = +1
0
–3
The AD8033/AD8034 FastFET™ amplifiers are voltage feedback
amplifiers with FET inputs, offering ease of use and excellent
performance. The AD8033 is a single amplifier and the AD8034
is a dual amplifier. The AD8033/AD8034 FastFET op amps in
Analog Devices, Inc., proprietary XFCB process offer significant
performance improvements over other low cost FET amps, such
as low noise (11 nV/√Hz and 0.7 fA/√Hz) and high speed (80 MHz
bandwidth and 80 V/μs slew rate).
With a wide supply voltage range from 5 V to 24 V and fully
operational on a single supply, the AD8033/AD8034 amplifiers
work in more applications than similarly priced FET input
amplifiers. In addition, the AD8033/AD8034 have rail-to-rail
outputs for added versatility.
G = –1
–6
–9
0.1
1
10
FREQUENCY (MHz)
100
1000
02924-004
GENERAL DESCRIPTION
Figure 4. Small Signal Frequency Response
The AD8033/AD8034 amplifiers only draw 3.3 mA/amplifier of
quiescent current while having the capability of delivering up to
40 mA of load current.
The AD8033 is available in a small package 8-lead SOIC and a
small package 5-lead SC70. The AD8034 is also available in a
small package 8-lead SOIC and a small package 8-lead SOT-23.
They are rated to work over the industrial temperature range of
−40°C to +85°C without a premium over commercial grade
products.
Despite their low cost, the amplifiers provide excellent overall
performance. They offer a high common-mode rejection of
−100 dB, low input offset voltage of 2 mV maximum, and low
noise of 11 nV/√Hz.
Rev. D
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: 781.461.3113 ©2002–2008 Analog Devices, Inc. All rights reserved.
AD8033/AD8034
SPECIFICATIONS
TA = 25°C, VS = ±5 V, RL = 1 kΩ, gain = +2, unless otherwise noted.
Table 1.
Parameter
DYNAMIC PERFORMANCE
−3 dB Bandwidth
Input Overdrive Recovery Time
Output Overdrive Recovery Time
Slew Rate (25% to 75%)
Settling Time to 0.1%
NOISE/HARMONIC PERFORMANCE
Distortion
Second Harmonic
Third Harmonic
Crosstalk, Output-to-Output
Input Voltage Noise
Input Current Noise
DC PERFORMANCE
Input Offset Voltage
Conditions
Min
Typ
G = +1, VOUT = 0.2 V p-p
G = +2, VOUT = 0.2 V p-p
G = +2, VOUT = 2 V p-p
−6 V to +6 V input
−3 V to +3 V input, G = +2
G = +2, VOUT = 4 V step
G = +2, VOUT = 2 V step
G = +2, VOUT = 8 V step
65
80
30
21
135
135
80
95
225
MHz
MHz
MHz
ns
ns
V/μs
ns
ns
−82
−85
−70
−81
−86
11
0.7
dBc
dBc
dBc
dBc
dB
nV/√Hz
fA/√Hz
55
fC = 1 MHz, VOUT = 2 V p-p
RL = 500 Ω
RL = 1 kΩ
RL = 500 Ω
RL = 1 kΩ
f = 1 MHz, G = +2
f = 100 kHz
f = 100 kHz
VCM = 0 V
TMIN − TMAX
1
Input Offset Voltage Match
Input Offset Voltage Drift
Input Bias Current
Open-Loop Gain
INPUT CHARACTERISTICS
Common-Mode Input Impedance
Differential Input Impedance
Input Common-Mode Voltage Range
FET Input Range
Common-Mode Rejection Ratio
OUTPUT CHARACTERISTICS
Output Voltage Swing
Output Short-Circuit Current
Capacitive Load Drive
POWER SUPPLY
Operating Range
Quiescent Current per Amplifier
Power Supply Rejection Ratio
TMIN − TMAX
VOUT = ± 3 V
89
4
1.5
50
92
Max
2
3.5
2.5
27
11
Unit
mV
mV
mV
μV/°C
pA
pA
dB
1000||2.3
1000||1.7
VCM = −3 V to +1.5 V
−89
±4.75
30% overshoot, G = +1, VOUT = 400 mV p-p
GΩ||pF
GΩ||pF
−5.0 to +2.2
−100
V
dB
±4.95
40
35
V
mA
pF
5
VS = ±2 V
−90
Rev. D | Page 3 of 24
3.3
−100
24
3.5
V
mA
dB
