AD8034 Analog Devices, AD8034 Datasheet

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AD8034

Manufacturer Part Number
AD8034
Description
Manufacturer
Analog Devices
Datasheet

Specifications of AD8034

-3db Bandwidth
80MHz
Slew Rate
80V/µs
Vos
1mV
Ib
1.5pA
# Opamps Per Pkg
2
Input Noise (nv/rthz)
11nV/rtHz
Vcc-vee
5V to 24V
Isy Per Amplifier
3.5mA
Packages
SOIC,SOT

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FEATURES
FET input amplifier
Very low cost
High speed
Low noise
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
APPLICATIONS
Instrumentation
Filters
Level shifting
Buffering
GENERAL DESCRIPTION
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.
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.
1 pA typical input bias current
80 MHz, −3 dB bandwidth (G = +1)
80 V/μs slew rate (G = +2)
11 nV/√Hz (f = 100 kHz)
0.7 fA/√Hz (f = 100 kHz)
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
Fax: 781.461.3113
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.
–V
–IN
+IN
NC
S
Figure 1. 8-Lead SOIC (R)
24
21
18
15
12
–3
–6
–9
1
2
3
4
NC = NO CONNECT
9
6
3
0
0.1
AD8033
G = +10
G = +5
G = +2
Figure 3. 8-Lead SOIC (R) and 8-Lead SOT-23 (RJ)
Figure 4. Small Signal Frequency Response
CONNECTION DIAGRAMS
V
©2002–2008 Analog Devices, Inc. All rights reserved.
OUT1
–IN1
+IN1
–V
1
8
7
6
5
S
NC
+V
V
NC
OUT
1
2
3
4
S
FREQUENCY (MHz)
AD8034
Low Cost, 80 MHz
FastFET Op Amps
AD8033/AD8034
10
G = –1
V
OUT
–V
+IN
8
7
6
5
Figure 2. 5-Lead SC70 (KS)
S
+V
V
–IN2
+IN2
OUT2
1
2
3
S
V
100
OUT
AD8033
G = +1
= 200mV p-p
www.analog.com
1000
5
4
+V
–IN
S

Related parts for AD8034

AD8034 Summary of contents

Page 1

... 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 − ...

Page 2

... AD8033/AD8034 TABLE OF CONTENTS Features .............................................................................................. 1 Applications ....................................................................................... 1 General Description ......................................................................... 1 Connection Diagrams ...................................................................... 1 Revision History ............................................................................... 2 Specifications ..................................................................................... 3 Absolute Maximum Ratings ............................................................ 6 Maximum Power Dissipation ..................................................... 6 Output Short Circuit .................................................................... 6 ESD Caution .................................................................................. 6 Typical Performance Characteristics ............................................. 7 Test Circuits ..................................................................................... 14 Theory of Operation ...................................................................... 16 Output Stage Drive and Capacitive Load Drive ..................... 16 REVISION HISTORY 9/08—Rev Rev. D Deleted Usable Input Range Parameter, Table 1 ...

Page 3

... − T MIN MAX T − T MIN MAX V = ± OUT V = − +1 30% overshoot + 400 mV p-p OUT V = ± Rev Page AD8033/AD8034 Min Typ Max Unit 65 80 MHz 30 MHz 21 MHz 135 ns 135 V/μ 225 ns −82 dBc − ...

Page 4

... AD8033/AD8034 T = 25° kΩ, gain = +2, unless otherwise noted Table 2. 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 ...

Page 5

... − T MIN MAX T − T MIN MAX V = ± OUT V = ±5 V −92 CM ±11.52 30% overshoot ±2 V −85 S Rev Page AD8033/AD8034 Typ Max Unit 80 MHz 30 MHz 21 MHz 100 ns 100 ns 80 V/μ 225 ns −80 dBc −82 dBc −70 dBc − ...

Page 6

... Even temporarily exceeding this temperature limit can change the stresses that the package exerts on the die, permanently shifting the parametric performance of the AD8033/ AD8034. Exceeding a junction temperature of 175°C for an extended period can result in changes in silicon devices, potentially causing failure. ...

Page 7

... 200mV p-p OUT 100 1000 Figure 9. Frequency Response for Various Output Amplitudes (See Figure 45 + ±12V S 10 100 V = ±12V S 10 100 Rev Page AD8033/AD8034 OUT p-p OUT p-p 2 OUT p-p V OUT 0 0 ...

Page 8

... AD8033/AD8034 200mV p-p OUT 100pF 25Ω SNUB –2 C –4 –6 0.1 1 FREQUENCY (MHz) Figure 12. Small Signal Frequency Response for Various 200mV p-p OUT C = 0pF R = 3kΩ 1.5pF 2pF ...

Page 9

... Figure 22. Harmonic Distortion vs. Frequency for Various Amplitudes 1M 10M 100M Figure 23. Percent Overshoot vs. Capacitive Load (See Figure 44) Rev Page AD8033/AD8034 HD2 HD3 HD2 HD3 0.1 1 FREQUENCY (MHz HD3 V = 10V p-p HD2 V OUT HD3 V ...

Page 10

... AD8033/AD8034 25mV/DIV Figure 24. Small Signal Transient Response 5 V (See Figure 44 20V p-p OUT p-p OUT p-p OUT 3V/DIV Figure 25. Large Signal Transient Response (See Figure 44 – 1.5V/DIV Figure 26. Output Overdrive Recovery (See Figure 46) 20ns/DIV 320ns/DIV V OUT 350ns/DIV Rev ...

Page 11

... Figure 34. Quiescent Supply Current vs. Temperature for Various Supply 4.0 3.5 –I 3 2.0 1.5 1.0 0.5 0 –0.5 –1.0 – Figure 35. Input Offset Voltage vs. Common-Mode Voltage Rev Page AD8033/AD8034 – 2V OUT 20ns/DIV Figure 33. 0.1% Short-Term Settling Time V = ±12V ± +5V S – ...

Page 12

... AD8033/AD8034 –20 –30 –40 –50 –60 –70 –80 0.1 1 FREQUENCY (MHz) Figure 36. CMRR vs. Frequency (See Figure 50) 1.0 0 0.6 0.4 V – 0 (mA) LOAD Figure 37. Output Saturation Voltage vs. Load Current 0 –10 –20 –30 –PSRR –40 –50 –60 –70 –80 –90 –100 ...

Page 13

... V OUT 1.2V/DIV V 1µs/DIV IN Figure 42 Response ± OUT V 1.2V/DIV Figure 43 Response, V Rev Page AD8033/AD8034 1µs/DIV IN = ± ...

Page 14

... Figure 46 −1 976Ω V OUT C 49.9Ω LOAD 976Ω V OUT C 49.9Ω LOAD 976Ω V OUT 49.9 Ω Rev Page µF + 10nF AD8033/AD8034 10nF + V SINE 0.2V p-p – + 1µF –V S Figure 47. Output Impedance 1kΩ 1k Ω 1µF + 10nF AD8033/AD8034 10nF + V SINE 0 ...

Page 15

... S Figure 50. CMRR V OUT TO PORT – V OUT 49.9Ω Rev Page AD8033/AD8034 1V p – 49.9Ω V OUT AD8033/AD8034 10nF + 1µF –V S Figure 51. Positive PSRR 1kΩ 1kΩ –V S – 499Ω 1kΩ 50Ω –V S 499Ω PORT 2 A 1kΩ ...

Page 16

... THERMAL CONSIDERATIONS Because the AD8034 operates ±12 V supplies in the small 8-lead SOT-23 package (160°C/W), power dissipation can easily exceed package limitations, resulting in permanent shifts in device characteristics and even failure. Likewise, high supply ...

Page 17

... Q25 D4 J1 –IN I1 – R14 J2 Q27 + Figure 53. Simplified AD8033/AD8034 Input Stage Rev Page AD8033/AD8034 + V2 V4 – Q13 Q14 V CC Q11 Q29 Q28 – V OUT ...

Page 18

... Poor PCB layout, contaminants, and the board insulator material can create leakage currents that are much larger than the input bias currents of the AD8033/AD8034. Any voltage differential between the inputs and nearby runs set up leakage currents through the PCB insulator, for example, 1 V/100 GΩ pA. ...

Page 19

... HIGH SPEED PEAK DETECTOR The low input bias current and high bandwidth of the AD8033/ AD8034 make the parts ideal for a fast settling, low leakage peak detector. The classic fast-low leakage topology with a diode in the output is limited to ~1.4 V p-p maximum in the case of the AD8033/AD8034 because of the protection diodes across the inputs, as shown in Figure 54 ...

Page 20

... In the case of high Q filter stages, the peaking must not exceed the open- loop bandwidth and the linear input range of the amplifier. Using an AD8033/AD8034, a 4-pole cascaded Sallen-Key filter can be constructed with MHz and over stop-band C attenuation, as shown in Figure 58 ...

Page 21

... When selecting components, the common-mode input capacitance must be taken into consideration. Filter cutoff frequencies can be increased beyond 1 MHz using the AD8033/AD8034 but limited open-loop gain and input impedance begin to interfere with the higher Q stages. This can cause early roll-off of the overall response. ...

Page 22

... AD8033/AD8034 The output noise over frequency of the preamp is shown in Figure 63. The pole in the loop transmission translates to a zero in the noise gain of the amplifier, leading to an amplification of the input voltage noise over frequency. The loop transmission zero introduced by C limits the amplification. The bandwidth of the ...

Page 23

... Dimensions shown in millimeters 2.90 BSC 1.60 BSC 2.80 BSC PIN 1 0.65 BSC 1.95 1.30 BSC 1.15 0.90 0.22 1.45 MAX 0.08 0.38 0.22 SEATING PLANE COMPLIANT TO JEDEC STANDARDS MO-178-BA Figure 66. 8-Lead Small Outline Transistor Package [SOT-23] (RJ-8) Dimensions shown in millimeters Rev Page AD8033/AD8034 0.50 (0.0196) 45° 0.25 (0.0099) 1.27 (0.0500) 0.40 (0.0157) 0.46 0.36 0.22 0.26 0.08 0.60 8° 0.45 4° 0.30 0° ...

Page 24

... AD8034ARZ-REEL –40°C to +85°C 1 AD8034ARZ-REEL7 –40°C to +85°C AD8034ART-R2 –40°C to +85°C AD8034ART-REEL –40°C to +85°C AD8034ART-REEL7 –40°C to +85°C 1 AD8034ARTZ-R2 –40°C to +85°C AD8034ARTZ-REEL 1 –40°C to +85°C 1 AD8034ARTZ-REEL7 –40°C to +85°C ...

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