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AD9622 PDF даташит

Спецификация AD9622 изготовлена ​​​​«Analog Devices» и имеет функцию, называемую «Wideband Voltage Feedback Amplifier».

Детали детали

Номер произв AD9622
Описание Wideband Voltage Feedback Amplifier
Производители Analog Devices
логотип Analog Devices логотип 

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AD9622 Даташит, Описание, Даташиты
a
Wideband Voltage
Feedback Amplifier
AD9622*
FEATURES
CONNECTION DIAGRAM
220 MHz Small Signal Bandwidth
160 MHz Large Signal BW (4 V p-p)
High Slew Rate: 1500 V/s
NC # 1
8 NC #
Low Distortion: –66 dB @ 20 MHz
Fast Settling: 14 ns to 0.01%
3.5 nV/Hz Spectral Noise Density
–INPUT 2
+INPUT 3
7 +VS
6 OUTPUT
؎3 V Supply Operation
APPLICATIONS
ADC Input Signal Amplifier
Differential Amplifiers
IF/RF Amplifiers
Pulse Amplifiers
OProfessional Video
DAC Current-to-Voltage
BBaseband and Video Communications
SActive Filters/lntegrators/Log Amps
OGENERAL DESCRIPTION
The AD9622 is one of a family of very high speed and wide
Lbandwidth amplifiers utilizing a voltage feedback architecture.
EThese amplifiers define a new level of performance for voltage
feedback amplifiers, especially in the categories of large signal
TEbandwidth, slew rate, settling, low distortion, and low noise.
–VS 4
AD9622
5 NC
# OPTIONAL CAPACITOR CB CONNECTED HERE
DECREASES SETTLING TIME (SEE TEXT).
Other members of the AD962X amplifier family are the
AD9621 (G = +1), AD9623 (G = +4), and the AD9624
(G = +6). A separate data sheet is available from Analog De-
vices for each model. Each generic device has been designed for
a different minimum stable gain setting, allowing users flexibility
in optimizing system performance. Dynamic performance speci-
fications such as slew rate, settling time, and distortion vary
from model to model. The table below summarizes key perfor-
Proprietary design architectures have resulted in an amplifier
mance attributes for the AD962X family and can be used as a
family that combines the most attractive attributes of both cur-
selection guide.
rent feedback and voltage feedback amplifiers. The AD9622
exhibits extraordinarily accurate and fast pulse response charac- The AD9622 is offered in industrial and military temperature
teristics (8 ns settling to 0.1%) as well as extremely wide small
ranges. Industrial versions are available in plastic DIP, SOIC,
and large signal bandwidth previously found only in current
and cerdip; MIL versions are packaged in cerdips.
feedback amplifiers. When combined with balanced high
impedance inputs and low input noise current more common to
voltage feedback architectures, the AD9622 offers performance
not previously available in a monolithic operational amplifier.
PRODUCT HIGHLIGHTS
1. Wide Large Signal Bandwidth
2. High Slew Rate
3. Fast Settling
*Protected by U.S. Patent 5,150,074 and others pending.
4. Low Distortion
5. Output Short-Circuit Protected
6. Low Intermodulation Distortion of High Frequencies
Parameter
Minimum Stable Gain
Harmonic Distortion (20 MHz)
Large Signal Bandwidth (4 V p-p)
SSBW (0.5 V p-p)
Slew Rate
Rise/Fall Time (0.5 V Step)
Settling Time (to 0.1%/0.01%)
Input Noise (0.1 MHz – 200 MHz)
AD9621
+1
–52
130
350
1200
2.4
7/11
80
AD9622
+2
–66
160
220
1500
1.7
8/14
49
AD9623
+4
–64
190
270
2100
1.6
8/14
36
AD9624
+6
–66
200
300
2200
1.5
8/14
32
Units
V/V
dB
MHz
MHz
V/µs
ns
ns
µV rms
REV. 0
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
which may result from its use. No license is granted by implication or
otherwise under any patent or patent rights of Analog Devices.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 617/329-4700
Fax: 617/326-8703









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AD9622 Даташит, Описание, Даташиты
AD9622–SPECIFICATIONS
DC ELECTRICAL CHARACTERISTICS (؎VS = ؎5 V, RLOAD = 100 ; AV = 2, RF = 270 unless otherwise noted)
Parameter
Conditions
Test AD9622AN/AQ/AR
AD9622SQ
Temp Level Min Typ Max Min Typ Max Units
DC SPECIFICATIONS1
Input Offset Voltage
+25°C I
–10 ± 2 +10 –10 ± 2 +10 mV
Full VI
–12
+12 –12
+12 mV
Input Bias Current
+25°C I
7 14
7 14 µA
Full VI
18 18 µA
Bias Current TC
Full V
35
35 nA/°C
Input Offset Current
+25°C I
–2 ± 0.3 +2 –2 ± 0.3 +2 µA
Full VI
–3
+3 –3
+3 µA
Offset Current TC
Full V
2.5
2.5 nA/°C
Input Resistance
Input Capacitance
Common-Mode Range
Common-Mode Rejection Ratio
Open-Loop Gain
Output Voltage Range
OOutput Current
Output Resistance
BFREQUENCY DOMAIN
SBandwidth (–3 dB)
Small Signal
OLarge Signal2
LAmplitude of Peaking
Amplitude of Roll-off
EPhase Nonlinearity
T2nd Harmonic Distortion
E3rd Harmonic Distortion
VCM = 1 V
VOUT = ± 2 V p-p
+25°C
+25°C
Full
+25°C
+25°C
Full
Full
+25°C
V
V
VI
I
V
VI
VI
V
VOUT 0.4 V p-p
VOUT 4 V p-p
Full Spectrum
DC to 100 MHz
0.3 to 100 MHz
2 V p-p; 20 MHz
2 V p-p; 20 MHz
Full
+25°C
Full
Full
+25°C
Full
Full
II
V
II
II
V
II
II
500
1.2
± 3.0 ± 3.4
47 57
60
± 3.0 ± 3.4
60 70
0.3
500
1.2
± 3.0 ± 3.4
47 57
60
± 3.0 ± 3.4
60 70
0.3
k
pF
V
dB
dB
V
mA
160 220
160 220
MHz
160 160 MHz
0.2 1.2
0.2 1.2 dB
0 0.8
0 0.8 dB
1.3 1.3 Degree
–66 –56
–66 –56 dBc
–68 –56
–68 –56 dBc
Common-Mode Rejection Ratio @ 20 MHz
+25°C V
+23
+23 dB
Spectral Input Noise Voltage
1 to 200 MHz
+25°C V
3.5
3.5 nV/Hz
Spectral Input Noise Current
1 to 200 MHz
+25°C V
3.2
3.2 pA/Hz
Average Equivalent Integrated
Input Noise Voltage
0.1 to 200 MHz +25°C V
49
49 µV rms
TIME DOMAIN
Slew Rate
Rise/Fall Time
Overshoot
Settling Time
To 0.1%
To 0.01%
To 0.1%3
To 0.01%3
Overdrive Recovery
Differential Gain (4.3 MHz)
Differential Phase (4.3 MHz)
VOUT = 5 V Step
VOUT = 0.5 V Step
VOUT = 5 V Step
VOUT = 2 V Step
Full
+25°C
Full
Full
IV
V
IV
IV
VOUT = 2 V Step
VOUT = 2 V Step
VOUT = 4 V Step
VOUT = 4 V Step
2ϫ to ± 2 mV
RL = 150
RL = 150
+25°C
Full
+25°C
+25°C
+25°C
+25°C
+25°C
V
IV
V
V
V
V
V
1150
1500
1.7
3.1 4.2
3 15
8
14 19
10
17
150
0.01
<0.01
1150
1500
1.7
3.1 4.2
3 15
8
14 19
10
17
150
0.01
<0.01
POWER SUPPLY REQUIREMENTS1
Supply Voltage (± VS)
Quiescent Current
+IS
–IS
Power Supply Rejection Ratio
+VS = +5 V
–VS = –5 V
VS = 0.5 V
Full IV
Full VI
Full VI
+25°C I
3.0 5.0 5.5 3.0 5.0 5.5
23 29
23 29
23 29
23 29
54 63
54 63
NOTES
1Measured at AV = 21.
2Effective large signal bandwidth; the device should not be stressed above 250 V ϫ MHz (VOUT p-p ϫ Frequency) to ensure long term reliability.
3Measured with a 0.001 µF CB capacitor connected across Pins 1 and 8.
Specifications subject to change without notice.
V/µs
ns
ns
%
ns
ns
ns
ns
ns
%
Degree
V
mA
mA
dB
–2– REV. 0









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AD9622 Даташит, Описание, Даташиты
AD9622
ABSOLUTE MAXIMUM RATINGS1
Supply Voltages (± VS) . . . . . . . . . . . . . . . . . . . . . . . . . . . ± 6 V
Common-Mode Input Voltage . . . . . . . . . . . . . . . . . . . . . . ± VS
Voltage Swing ϫ Bandwidth Product . . . . . . . . . 250 V ϫ MHz
THEORY OF OPERATION
The AD9622 is a wide bandwidth voltage feedback amplifier
that is guaranteed for minimum gain stability of +2. Since its
open-loop frequency response follows the conventional 6 dB/
Differential Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . 6 V octave roll-off, its gain bandwidth product is basically constant.
Continuous Output Current2 . . . . . . . . . . . . . . . . . . . . . 90 mA Increasing its closed-loop gain results in a corresponding de-
Operating Temperature Ranges
AN, AQ, AR . . . . . . . . . . . . . . . . . . . . . . . . –40°C to +85°C
SQ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –55°C to +125°C
crease in small signal bandwidth. The AD9622 typically main-
tains a 60 degree unity loop gain phase margin with RF 270 .
This high margin minimizes the effects of signal and noise peaking.
Storage Temperature
Feedback Resistor Choice
Ceramic . . . . . . . . . . . . . . . . . . . . . . . . . . . –65°C to +150°C At minimum stable gain (+2), the AD9622 provides optimum
Plastic . . . . . . . . . . . . . . . . . . . . . . . . . . . . –65°C to +125°C
Junction Temperature
Ceramic3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +175°C
Plastic3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +150°C
Lead Soldering Temperature (1 minute)4 . . . . . . . . . . +220°C
NOTES
1Absolute maximum ratings are limiting values to be applied individually, and
beyond which the serviceability of the circuit may be impaired. Functional
operability is not necessarily implied. Exposure to absolute maximum rating
Oconditions for an extended period of time may affect device reliability.
2Output is short-circuit protected; for maximum reliability, 90 mA continuous
Bcurrent should not be exceeded.
3Typical thermal impedances (part soldered onto board; no air flow):
SCeramic DIP: θJA = 100°C/W; θJC = 30°C/W
Plastic SOIC: θJA = 125°C/W; θJC = 45°C/W
OPlastic DIP: θJA = 90°C/W; θJC = 45°C/W
4Temperature shown is for surface mount devices, mounted by vapor phase
soldering. Throughhole devices (ceramic and plastic DIPs) can be soldered at
L+300°C for 10 seconds.
EORDERING GUIDE
TETemperature
Package
Package
dynamic performance with RF = 270 . When using this value
and following the high speed layout guidelines, a shunt capacitor
(CF) should not be required. This value for RF provides the best
combination of wide bandwidth, low peaking, and distortion.
However, if improved gain flatness is desired, a shunt capacitor
(CF) will provide extra phase margin. This reduces both over-
shoot and peaking with only a slight reduction of bandwidth.
As an example, if the amplifier exhibits (worst case) peaking of
1 dB with RGʈRF = 135 (AV = 2), then using a CF of
1.5 pF across RF will reduce this peaking to 0 dB. In addition,
overshoot, noise, and settling time (0.01%) will also improve.
This comes at the expense of slightly decreased closed-loop
bandwidth due to the RF ϫ CF time constant created.
If the equivalent input capacitance greatly exceeds 2 pF (due to
source drive or long input traces to the amplifier), then added
shunt capacitance (CF) will be necessary to maintain stability.
Likewise, if larger RG/RF minimum-gain setting resistors are
used, CF will be necessary. As a rule of thumb, if the product of
Model
Range
Description
Option
RFʈRG ϫ CI 270 ϫ 10–12 seconds, then CF is not required (for
AD9622AN –40°C to +85°C 8-Pin Plastic DIP N-8
AD9622AQ –40°C to +85°C 8-Pin Cerdip
Q-8
maximum bandwidth applications) and the amplifier’s phase
margin will maintain about 60°.
AD9622AR –40°C to +85°C 8-Pin SOIC
R-8
For RFʈRG >150 , use a CF equal to CI ϫ RG/RF. As the value
AD9622SQ –55°C to +125°C 8-Pin Cerdip
Q-8
of RFʈRG increases, the bandwidth of the amplifier will begin to
be controlled by the RF ϫ CF time constant. Increasing CF much
EXPLANATION OF TEST LEVELS
beyond these guidelines will also cause amplifier instability.
Test Level
Pulse Response
I – 100% production tested.
II – 100% production tested at +25°C, and sample tested at
specified temperatures. AC testing of “A” grade devices
Unlike a traditional voltage feedback amplifier in which slew
speed is usually dictated by its front end dc quiescent current
and gain bandwidth product, the AD9622 provides “on de-
done on sample basis.
III – Sample tested only.
IV – Parameter is guaranteed by design and characterization
mand” transconductance current that increases proportion-
ally to the input “step” signal amplitude. This results in slew
speeds (1500 V/µs) comparable to wideband current feedback
testing.
V – Parameter is a typical value only.
designs. This, combined with relatively low input noise current
(3.2 pA/Hz), gives the AD9622 the best attributes of both volt-
VI – All devices are 100% production tested at +25°C. 100%
age and current feedback amplifiers.
production tested at temperature extremes for extended
temperature devices; sample tested at temperature ex-
tremes for commercial/industrial devices.
Bootstrap Capacitor (CB)
In most applications, the CB capacitor should not be required.
Under certain conditions, it can be used to further enhance set-
OUTPUT
tling time performance.
+VS
CB+
– INPUT
46.5mm
54mils
–VS
CB–
REV. 0
–INPUT +INPUT
46.5mils
Chip Layout
–3–










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