AD8038 Analog Devices, AD8038 Datasheet

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AD8038

Manufacturer Part Number
AD8038
Description
Low Power, 350 MHz Voltage Feedback Amplifiers
Manufacturer
Analog Devices
Datasheet

Specifications of AD8038

-3db Bandwidth
350MHz
Slew Rate
425V/µs
Vos
500µV
Ib
400nA
# Opamps Per Pkg
1
Input Noise (nv/rthz)
8nV/rtHz
Vcc-vee
3V to 12V
Isy Per Amplifier
1.5mA
Packages
SC70,SOIC

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REV. F
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. 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.
PRODUCT DESCRIPTION
The AD8038 (single) and AD8039 (dual) amplifiers are high
speed (350 MHz) voltage feedback amplifiers with an exception-
ally low quiescent current of 1.0 mA/amplifier typical (1.5 mA max).
The AD8038 single amplifier in the SOIC-8 package has a dis-
able feature. Despite being low power and low cost, the amplifier
provides excellent overall performance. Additionally, it offers
a high slew rate of 425 V/µs and low input offset voltage of
3 mV max.
ADI’s proprietary XFCB process allows low noise operation
(8 nV/√Hz and 600 fA/√Hz) at extremely low quiescent currents.
Given a wide supply voltage range (3 V to 12 V), wide band-
width, and small packaging, the AD8038 and AD8039 amplifiers
are designed to work in a variety of applications where power and
space are at a premium.
The AD8038 and AD8039 amplifiers have a wide input common-
mode range of 1 V from either rail and will swing within 1 V of
each rail on the output. These amplifiers are optimized for driving
FEATURES
Low Power
High Speed
Low Cost
Low Noise
Low Input Bias Current: 750 nA Max
Low Distortion
Wide Supply Range: 3 V to 12 V
Small Packaging: SOT-23-8, SC70-5, and SOIC-8
APPLICATIONS
Battery-Powered Instrumentation
Filters
A/D Drivers
Level Shifting
Buffering
High Density PC Boards
Photo Multipliers
1 mA Supply Current/Amp
350 MHz, –3 dB Bandwidth (G = +1)
425 V/ s Slew Rate
8 nV/√Hz @ 100 kHz
600 fA/√Hz @ 100 kHz
–90 dB SFDR @ 1 MHz
–65 dB SFDR @ 5 MHz
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700
Fax: 781/326-8703
capacitive loads up to 15 pF. If driving larger capacitive loads,
a small series resistor is needed to avoid excessive peaking or
overshoot.
The AD8039 amplifier is the only dual, low power, high speed
amplifier available in a tiny SOT-23-8 package, and the single
AD8038 is available in both a SOIC-8 and an SC70-5 package.
These amps are rated to work over the industrial temperature
range of –40°C to +85°C.
–V
–IN
+IN
NC
S
Voltage Feedback Amplifiers
Figure 1. Small Signal Frequency Response for
Various Gains, V
NC = NO CONNECT
1
2
3
4
24
21
18
15
12
–3
–6
9
6
3
0
0.1
SOIC-8 (R)
AD8038
G = +10
G = +5
G = +2
G = +1
CONNECTION DIAGRAMS
SOIC-8 (R) and SOT-23-8 (RT)
V
OUT1
–IN1
+IN1
8
7
6
5
© 2004 Analog Devices, Inc. All rights reserved.
–V
1
DISABLE
+V
V
NC
S
OUT
Low Power 350 MHz
S
1
2
3
4
OUT
FREQUENCY – MHz
AD8038/AD8039
AD8039
= 500 mV p-p, V
10
V
OUT
–V
+IN
8
7
6
5
S
+V
V
–IN2
+IN2
SC70-5 (KS)
OUT2
1
2
3
S
100
AD8038
S
+ –
= ± 5 V
www.analog.com
5
4
1000
+V
–IN
S

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AD8038 Summary of contents

Page 1

... MHz) voltage feedback amplifiers with an exception- ally low quiescent current of 1.0 mA/amplifier typical (1.5 mA max). The AD8038 single amplifier in the SOIC-8 package has a dis- able feature. Despite being low power and low cost, the amplifier provides excellent overall performance. Additionally, it offers a high slew rate of 425 V/µ ...

Page 2

... Quiescent Current per Amplifier Power Supply Rejection Ratio POWER-DOWN DISABLE* Turn-On Time Turn-Off Time Disable Voltage—Part is OFF Disable Voltage—Part is ON Disabled Quiescent Current Disabled In/Out Isolation *Only available in AD8038 SOIC-8 package. Specifications subject to change without notice Conditions ...

Page 3

... Power Supply Rejection Ratio POWER-DOWN DISABLE* Turn-On Time Turn-Off Time Disable Voltage—Part is OFF Disable Voltage—Part is ON Disabled Quiescent Current Disabled In/Out Isolation *Only available in AD8038 SOIC-8 package. Specifications subject to change without notice. REV /2, Gain = +1, unless otherwise noted.) L ...

Page 4

... ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily accumulate on the human body and test equipment and can discharge without detection. Although the AD8038/AD8039 features proprietary ESD protection circuitry, permanent damage may occur on devices subjected to high energy electrostatic discharges. Therefore, proper ESD precautions are recommended to avoid performance degradation or loss of functionality ...

Page 5

... FREQUENCY – MHz TPC 7. Small Signal Frequency Response for Various C , LOAD = ± 500 mV p-p, V OUT REV. F Typical Performance Characteristics–AD8038/AD8039 p-p, Frequency = 1 MHz 1. ...

Page 6

... AD8038/AD8039 80 180 70 60 135 50 PHASE GAIN –10 –20 –45 0.01 0 100 1000 FREQUENCY – MHz TPC 10. Open-Loop Gain and = ± Phase – 500 HD2 L –50 – 500 HD3 L –60 –65 – HD3 – HD2 L – ...

Page 7

... Response for Various Capacitive = ± Loads 25pF 5pF 2.5V L 500mV/DIV 5ns/DIV TPC 26. Large Signal Transient Response for Various Capacitive Loads –7– AD8038/AD8039 R = 500 50mV/DIV TPC 21. Small Signal Transient , Response for Various R = ± 500 ...

Page 8

... V IN 0.5V/DIV 5ns/DIV TPC 30. 0.1% Settling Time p-p OUT 1000 100 +5V S 0.1 0.01 0 100 1000 FREQUENCY – MHz TPC 33. Output Impedance vs. Frequency 1.25 1.00 0.75 0.50 0. SUPPLY VOLTAGE – V TPC 36. AD8038 Supply Current vs. Supply Voltage REV. F ...

Page 9

... LAYOUT, GROUNDING, AND BYPASSING CONSIDERATIONS Disable The AD8038 in the SOIC-8 package provides a disable feature. This feature disables the input from the output (see TPC 37 for input-output isolation) and reduces the quiescent current from typically 0.2 mA. When the DISABLE node is pulled below 4 ...

Page 10

... The AD8038 can be used to make an effective low-pass active filter that consumes one-fifth of the power consumed by an active filter made from an op amp. Figure 4 shows a circuit that uses an AD8038 to create a single ± 2.5 V supply, three-pole Sallen-Key filter. This circuit uses a single RC pole in front of a standard two-pole active section. ...

Page 11

... Dimensions shown in millimeters 2.00 BSC 5 4 1.25 BSC 2.10 BSC PIN 1 0.65 BSC 1.00 1.10 MAX 0.90 0.70 0.22 0.08 0.30 0.10 MAX SEATING 0.15 PLANE 0.10 COPLANARITY COMPLIANT TO JEDEC STANDARDS MO-203AA –11– AD8038/AD8039 (RT-8) Dimensions shown in millimeters 2.90 BSC 2.80 BSC 0.65 BSC 1.95 BSC 1.45 MAX 0.22 0.08 8 0.38 4 0.22 SEATING 0 PLANE COMPLIANT TO JEDEC STANDARDS MO-178BA ...

Page 12

... Sheet Changed from REV REV. C. Updated CONNECTION DIAGRAMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Updated ORDERING GUIDE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Updated OUTLINE DIMENSIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 5/02–Data Sheet Changed from REV REV. B. Add part number AD8038 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . UNIVERSAL Changes to Product Title . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Changes to FEATURES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Changes to PRODUCT DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Changes to CONNECTION DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Update to SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Update to MAXIMUM POWER DISSIPATION ...

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