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AD8023 Schematic ( PDF Datasheet ) - Analog Devices

Teilenummer AD8023
Beschreibung High Current Output/ Triple Video Amplifier
Hersteller Analog Devices
Logo Analog Devices Logo 




Gesamt 11 Seiten
AD8023 Datasheet, Funktion
a
High Current Output,
Triple Video Amplifier
FEATURES
Drives 13 V Output
Drives Unlimited Capacitive Load
High Current Output Drive: 70 mA
Excellent Video Specifications (RL = 150 )
Gain Flatness 0.1 dB to 10 MHz
0.06% Differential Gain Error
0.02؇ Differential Phase Error
Power
Operates on ؎2.5 V to ؎7.5 V Supply
10.0 mA/Amplifier Max Power Supply Current
High Speed
250 MHz Unity Gain Bandwidth (3 dB)
1200 V/s Slew Rate
Fast Settling Time of 35 ns (0.1%)
High Speed Disable Function
Turn-Off Time 30 ns
Easy to Use
200 mA Short Circuit Current
Output Swing to 1 V of Rails
APPLICATIONS
LCD Displays
Video Line Driver
Broadcast and Professional Video
Computer Video Plug-In Boards
Consumer Video
RGB Amplifier in Component Systems
PRODUCT DESCRIPTION
The AD8023 is a high current output drive, high voltage output
drive, triple video amplifier. Each amplifier has 70 mA of output
current and is optimized for driving large capacitive loads. The
amplifiers are current feedback amplifiers and feature gain
flatness of 0.1 dB to 10 MHz while offering differential gain and
phase error of 0.06% and 0.02°.
AD8023
PIN CONFIGURATION
14-Lead SOIC
DISABLE 1 1
DISABLE 2 2
DISABLE 3 3
+VS 4
+IN 1 5
–IN 1 6
OUT 1 7
AD8023
14 OUT 2
13 –IN 2
12 +IN 2
11 –VS
10 +IN 3
9 –IN 3
8 OUT 3
The AD8023 uses maximum supply current of 10.0 mA per
amplifier and runs on ± 2.5 V to ± 7.5 V power supply. The
outputs of each amplifier swing to within one volt of either
supply rail to easily accommodate video signals. The AD8023
is unique among current feedback op amps by virtue of its large
capacitive load drive with a small series resistor, while still
achieving rapid settling time. For instance, it can settle to 0.1% in
35 ns while driving 300 pF capacitance.
The bandwidth of 250 MHz along with a 1200 V/µs slew rate
make the AD8023 useful in high speed applications requiring
a single +5 V or dual power supplies up to ± 7.5 V. Further-
more, the AD8023 contains a high speed disable function for
each amplifier in order to power down the amplifier or high
impedance the output. This can then be used in video multi-
plexing applications. The AD8023 is available in the indus-
trial temperature range of –40°C to +85°C.
VIN VIN
VO VO
Figure 1. Pulse Response Driving a Large Load Capacitor,
CL = 300 pF, G = +3, RF = 750 , RS = 16.9 , RL = 10 k
REV. A
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.
Figure 2. Output Swing Voltage,
RL = 150 ; VS = ±7.5 V, G = +10
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700 World Wide Web Site: http://www.analog.com
Fax: 781/326-8703
© Analog Devices, Inc., 2000






AD8023 Datasheet, Funktion
AD8023
200
100
I NOISE
+I NOISE
200
100
10 10
V NOISE
10
0.1 1 10 100
FREQUENCY kHz
Figure 12. Input Current and Voltage Noise vs. Frequency
90
80
70
VS = ؎7.5V
60
50
VS = ؎2.5V
40
VCM
R
R
R
30
20
10
01 10
FREQUENCY MHz
R
100 200
Figure 15. Common-Mode Rejection vs. Frequency
450
VS = ؎7.5V
400
SOURCE
350
SINK
300
250
50 40 30 20 10 0 10 20 30 40 50 60 70 80 90 100
TEMPERATURE ؇C
Figure 13. Short Circuit Current vs. Temperature
70
60 VS = ؎7.5V (+PSRR)
50
VS = ؎2.5V (+PSRR)
40
30
20 VS = ؎2.5V (PSRR)
VS = ؎7.5V (PSRR)
10
0
1 10 100
FREQUENCY MHz
Figure 16. Power Supply Rejection Ratio vs. Frequency
10k
G = +1
1k VS = ؎7.5V
100
10
1 10 100 200
FREQUENCY Hz
Figure 14. Output Resistance vs. Frequency,
Disabled State
0
G = +1
10 VS = ؎7.5V
VO = 2V p-p
20
30
40
50
60
70
80
90
1
2ND
3RD
10
FREQUENCY MHz
100
Figure 17. Harmonic Distortion vs. Frequency, RL = 150
–6– REV. A

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