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PDF AD8013 Data sheet ( Hoja de datos )
| Número de pieza | AD8013 | |
| Descripción | Single Supply/ Low Power/ Triple Video Amplifier | |
| Fabricantes | Analog Devices | |
| Logotipo |  |
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a
Single Supply, Low Power,
Triple Video Amplifier
AD8013
FEATURES
Three Video Amplifiers in One Package
Drives Large Capacitive Load
Excellent Video Specifications (RL = 150 ⍀)
Gain Flatness 0.1 dB to 60 MHz
0.02% Differential Gain Error
0.06° Differential Phase Error
Low Power
Operates on Single +5 V to +13 V Power Supplies
4 mA/Amplifier Max Power Supply Current
High Speed
140 MHz Unity Gain Bandwidth (3 dB)
Fast Settling Time of 18 ns (0.1%)
1000 V/s Slew Rate
High Speed Disable Function per Channel
Turn-Off Time 30 ns
Easy to Use
95 mA Short Circuit Current
Output Swing to Within 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 AD8013 is a low power, single supply, triple video
amplifier. Each of the three amplifiers has 30 mA of output
current, and is optimized for driving one back terminated video
load (150 Ω) each. Each amplifier is a current feedback amp-
lifier and features gain flatness of 0.1 dB to 60 MHz while offering
0.2
0.1
0
–0.1
–0.2
–0.3
–0.4
–0.5
G = +2
RL = 150Ω
VS = ± 5V
VS = +5V
1M
10M
100M
FREQUENCY – Hz
1G
Fine-Scale Gain Flatness vs. Frequency, G = +2, RL = 150 Ω
PIN CONFIGURATION
14-Pin DIP & SOIC Package
DISABLE 1 1
DISABLE 2 2
DISABLE 3 3
+VS 4
+IN 1 5
–IN 1 6
OUT 1 7
AD8013
14 OUT 2
13 –IN 2
12 +IN 2
11 –VS
10 +IN 3
9 –IN 3
8 OUT 3
differential gain and phase error of 0.02% and 0.06°. This
makes the AD8013 ideal for broadcast and professional video
electronics.
The AD8013 offers low power of 4 mA per amplifier max and
runs on a single +5 V to +13 V power supply. The outputs of
each amplifier swing to within one volt of either supply rail to
easily accommodate video signals. The AD8013 is unique
among current feedback op amps by virtue of its large capacitive
load drive. Each op amp is capable of driving large capacitive
loads while still achieving rapid settling time. For instance it
can settle in 18 ns driving a resistive load, and achieves 40 ns
(0.1%) settling while driving 200 pF.
The outstanding bandwidth of 140 MHz along with 1000 V/µs
of slew rate make the AD8013 useful in many general purpose
high speed applications where a single +5 V or dual power
supplies up to ± 6.5 V are required. Furthermore the AD8013’s
high speed disable function can be used to power down the
amplifier or to put the output in a high impedance state. This
can then be used in video multiplexing applications. The
AD8013 is available in the industrial temperature range of
–40°C to +85°C.
500mV
100
9
0
500ns
1
0%0
5V
Channel Switching Characteristics for a 3:1 Mux
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.
© Analog Devices, Inc., 1995
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 617/329-4700
Fax: 617/326-8703
1 page  
10
VS = ±5V
8
6
4
VS = +5V
2
0
10 100 1k 10k
LOAD RESISTANCE – Ω
Figure 3. Output Voltage Swing vs. Load Resistance
AD8013
3
2
1
0
–IB
–1
–2
+IB
–3
–60 –40 –20 0 20 40 60 80 100 120 140
JUNCTION TEMPERATURE – °C
Figure 6. Input Bias Current vs. Junction Temperature
12
11
VS = ± 5V
10
9
VS = +5V
8
7
6
–60 –40 –20 0 20 40 60 80 100 120 140
JUNCTION TEMPERATURE – °C
Figure 4. Total Supply Current vs. Junction Temperature
2
1
0
–1
VS = +5V
–2
VS = ±5V
–3
–4
–60 –40 –20 0 20 40 60 80 100 120 140
JUNCTION TEMPERATURE – °C
Figure 7. Input Offset Voltage vs. Junction
Temperature
11
TA = +25°C
10
9
8
7
1234567
SUPPLY VOLTAGE – ± Volts
Figure 5. Supply Current vs. Supply Voltage
140
VS = ± 5V
130
SOURCE
120
SINK
100
90
80
–60 –40 –20 0 20 40 60 80 100 120 140
JUNCTION TEMPERATURE – °C
Figure 8. Short Circuit Current vs. Junction
Temperature
REV. A
–5–
5 Page 
1.5
1.0 G = +2
RL = 150Ω
0.5
0
–0.5
–1.0
VS = +5V
VS = ±5V
–1.5
–2.0
1M
10M
100M
FREQUENCY – Hz
1G
Figure 34. Closed-Loop Gain Matching vs. Frequency
10
G = +2
8 RL = 150Ω
6
4 VS = +5V
2
VS = ±5V
1.0
G = +2
0.5 RL = 150Ω
0
DELAY
–0.5
–1.0
100k
DELAY
MATCHING
1M 10M
FREQUENCY – Hz
VS = ±5V
VS = +5V
100M
Figure 35. Group Delay and Group Delay Matching
vs. Frequency, G = +2, RL = 150 Ω
Disable Mode Operation
Pulling the voltage on any one of the Disable pins about 1.6 V
up from the negative supply will put the corresponding
amplifier into a disabled, powered down, state. In this
condition, the amplifier’s quiescent current drops to about
0.3 mA, its output becomes a high impedance, and there is
a high level of isolation from input to output. In the case of
the gain of two line driver for example, the impedance at the
output node will be about the same as for a 1.6 kΩ resistor
(the feedback plus gain resistors) in parallel with a 12 pF
capacitor and the input to output isolation will be about
66 dB at 5 MHz.
Leaving the Disable pin disconnected (floating) will leave
the corresponding amplifier operational, in the enabled
state. The input impedance of the disable pin is about 40 kΩ
in parallel with a few picofarads. When driven to 0 V, with
the negative supply at –5 V, about 100 µA flows into the
disable pin.
When the disable pins are driven by complementary output
CMOS logic, on a single 5 V supply, the disable and enable
times are about 50 ns. When operated on dual supplies,
level shifting will be required from standard logic outputs to
the Disable pins. Figure 36 shows one possible method
which results in a negligible increase in switching time.
AD8013
VI
8k
+5V
TO DISABLE PIN
4k 10k
–5V
VI HIGH => AMPLIFIER ENABLED
VI LOW => AMPLIFIER DISABLED
Figure 36. Level Shifting to Drive Disable Pins on Dual
Supplies
The AD8013’s input stages include protection from the large
differential input voltages that may be applied when disabled.
Internal clamps limit this voltage to about ±3 V. The high input to
output isolation will be maintained for voltages below this limit.
3:1 Video Multiplexer
Wiring the amplifier outputs together will form a 3:1 mux with
excellent switching behavior. Figure 37 shows a recommended
configuration which results in –0.1 dB bandwidth of 35 MHz
and OFF channel isolation of 60 dB at 10 MHz on ± 5 V
supplies. The time to switch between channels is about 50 ns.
Switching time is virtually unaffected by signal level.
665Ω
845Ω
+VS
VIN1
64
84Ω
7
51
75Ω
DISABLE 1
VIN2
665Ω
845Ω
13
12
75Ω
14
2
75Ω
84Ω CABLE
VOUT
75Ω
DISABLE 2
665Ω
845Ω
VIN3
DISABLE 3
9
10
75Ω
8
11
3
–VS
84Ω
Figure 37. A Fast Switching 3:1 Video Mux (Supply
Bypassing Not Shown)
500mV
100
90
200ns
10
0%
5V
REV. A
–11–
Figure 38. Channel Switching Characteristic for the
3:1 Mux
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet AD8013.PDF ] | |
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