Analog Devices AD8023 Datasheet
High Current Output,
a
FEATURES
Drives 13 V Output
Drives Unlimited Capacitive Load
High Current Output Drive: 70 mA
Excellent Video Specifications (R
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°.
= 150 )
L
Triple Video Amplifier
AD8023
PIN CONFIGURATION
14-Lead SOIC
14
OUT 2
–IN 2
13
+IN 2
12
–V
11
S
+IN 3
10
9
–IN 3
OUT 3
8
+V
+IN 1
–IN 1
OUT 1
1
2
3
AD8023
4
S
5
6
7
DISABLE 1
DISABLE 2
DISABLE 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. Furthermore, 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 multiplexing applications. The AD8023 is available in the industrial temperature range of –40°C to +85°C.
V
IN
V
O
Figure 1. Pulse Response Driving a Large Load Capacitor,
= 300 pF, G = +3, RF = 750 Ω, RS = 16.9 Ω, RL = 10 k
C
L
Ω
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.
V
IN
V
O
Figure 2. Output Swing Voltage,
= 150Ω; VS = ±7.5 V, G = +10
R
L
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–SPECIFICATIONS
(@ TA = +25C, VS = 7.5, C
= 10 pF, R
LOAD
= 150 , unless otherwise noted)
LOAD
Model AD8023A
Conditions V
Min Typ Max Units
S
DYNAMIC PERFORMANCE
Bandwidth (3 dB) R
= 750 Ω No Peaking, G = +3 125 MHz
FB
Bandwidth (0.1 dB) No Peaking, G = +3 7 MHz
Slew Rate 5 V Step 1200 V/µs
Settling Time to 0.1% 0 V to ±6 V (6 V Step)
C
= 300 pF
LOAD
R
> 1 kΩ, RFB = 750 Ω
LOAD
TA = +25°C to +70°C, RS = 16.9 Ω 30 ns
NOISE/HARMONIC PERFORMANCE
Total Harmonic Distortion
fC = 5 MHz, RL = 150 Ω, VO = 2 p-p –72 dBc
Input Voltage Noise f = 10 kHz 2.0 nV/√Hz
Input Current Noise f = 10 kHz (–I
Differential Gain (R
= 150 Ω) f = 3.58 MHz, G = +2, RFB = 750 Ω 0.06 %
L
) 14 pA/√Hz
IN
Differential Phase (RL = 150 Ω) f = 3.58 MHz, G = +2, RFB = 750 Ω 0.02 Degrees
DC PERFORMANCE
Input Offset Voltage T
MIN
to T
MAX
–5 2 5 mV
Offset Drift 2 µV/°C
Input Bias Current (–) T
Input Bias Current (+) T
MIN
MIN
to T
to T
MAX
MAX
–45 15 45 µA
–25 5 25 µA
Open-Loop Transresistance 67 111 kΩ
T
MIN
to T
MAX
50 111 kΩ
INPUT CHARACTERISTICS
Input Resistance
+Input T
–Input T
MIN
MIN
to T
to T
MAX
MAX
100 kΩ
75 Ω
Input Capacitance 2pF
Input Common-Mode Voltage Range ±6.0 V
Common-Mode Rejection Ratio
Input Offset Voltage 50 56 dB
–Input Current 0.2 µA/V
+Input Current 5 µA/V
OUTPUT CHARACTERISTICS
Output Voltage Swing
RL = 1 kΩ VOL–V
V
= 150 Ω VOL–V
R
L
CC–VOH
V
CC–VOH
EE
EE
0.8 1.0 V
0.8 1.0 V
1.0 1.3 V
1.0 1.3 V
Output Current 50 70 mA
Short-Circuit Current 300 mA
Capacitive Load Drive 1000 pF
MATCHING CHARACTERISTICS
Dynamic
Crosstalk G = +2, f = 5 MHz 70 dB
DC
Input Offset Voltage –5 0.3 5 mV
–Input Bias Current –10 3 10 µA
POWER SUPPLY
Operating Range Single Supply +4.2 +15 V
Dual Supply ±2.1 ±7.5 V
Quiescent Current/Amplifier 6.2 mA
7.0 10.0 mA
T
MIN to TMAX
Power-Down 1.3 4.0 mA
–2–
REV. A
Model AD8023A
Conditions V
Min Typ Max Units
S
POWER SUPPLY (Continued)
Power Supply Rejection Ratio V
= ±2.5 V to ±7.5 V dB
S
Input Offset Voltage 54 76 dB
–Input Current 0.03 µA/V
+Input Current 0.07 µA/V
DISABLE CHARACTERISTICS
Off Isolation f = 6 MHz –70 dB
Off Output Capacitance G = +1 12 pF
Turn-On Time 50 ns
Turn-Off Time R
Switching Threshold V
Specifications subject to change without notice.
= 150 Ω 30 ns
L
TH
– V
EE
1.6 V
AD8023
ABSOLUTE MAXIMUM RATINGS
*
Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . 15.5 V Total
Internal Power Dissipation
Small Outline (R) . . . . 1.0 Watts (Observe Derating Curves)
Input Voltage (Common Mode) . . . . . . . . . . . . . . . . . . . .±V
S
Differential Input Voltage . . . . . . . . . . . . . . . .±3 V (Clamped)
Output Voltage Limit
Maximum . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .+V
Minimum . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –V
S
S
Output Short Circuit Duration
. . . . . . . . . . . . . . . . . . . . Observe Power Derating Curves
Storage Temperature Range
R Package . . . . . . . . . . . . . . . . . . . . . . . . –65°C to +125°C
Operating Temperature Range
AD8023A . . . . . . . . . . . . . . . . . . . . . . . . . . –40°C to +85°C
Lead Temperature Range (Soldering 10 sec) . . . . . . . . +300°C
*Stresses above those listed under Absolute Maximum Ratings may cause perma-
nent damage to the device. This is a stress rating only; functional operation of the
device at these or any other conditions above those indicated in the operational
section of this specification is not implied. Exposure to absolute maximum rating
conditions for extended periods may affect device reliability.
ORDERING GUIDE
Temperature Package Package
Model Range Description Option
AD8023AR –40°C to +85°C 14-Lead Plastic SOIC R-14
AD8023AR- –40°C to +85°C 13" Tape and Reel R-14
REEL
AD8023AR- –40°C to +85°C 7" Tape and Reel R-14
REEL7
AD8023ACHIPS –40°C to +85°CDie
Maximum Power Dissipation
The maximum power that can be safely dissipated by the AD8023
is limited by the associated rise in junction temperature. The
maximum safe junction temperature for the plastic encapsulated
parts is determined by the glass transition temperature of the
plastic, about 150°C. Temporarily exceeding this limit may
cause a shift in parametric performance due to a change in the
stresses exerted on the die by the package. Exceeding a junction
temperature of 175°C for an extended period can result in
device failure.
While the AD8023 is internally short circuit protected, this may
not be enough to guarantee that the maximum junction temperature is not exceeded under all conditions. To ensure proper
operation, it is important to observe the derating curves.
It must also be noted that in (noninverting) gain configurations
(with low values of gain resistor), a high level of input overdrive
can result in a large input error current, which may result in a
significant power dissipation in the input stage. This power
must be included when computing the junction temperature rise
due to total internal power.
2.5
TJ = +150C
2.0
1.5
14-LEAD SOIC
1.0
MAXIMUM POWER DISSIPATION – Watts
0.5
–50 90–40 –30 –20 0 1020 30 4050 6070 80
–10
AMBIENT TEMPERATURE – C
Figure 3. Maximum Power Dissipation vs. Ambient
Temperature
CAUTION
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 AD8023 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.
REV. A
–3–
WARNING!
ESD SENSITIVE DEVICE
AD8023
METALIZATION PHOTO
Contact factory for latest dimensions.
Dimensions shown in inches and (mm).
7
OUT 1
8
OUT 3
–IN1
6
–IN3
+IN
5
9
+IN 3
DISABLE 3
+V
S
4
10
0.0713
(1.81)
3
–V
S
11
+IN 2
DISABLE 2
2
DISABLE 1
1
0.0634
(1.61)
14
OUT 2
–IN 2
13
12
Typical Performance Characteristics
8
7
6
5
4
3
2
1
COMMON-MODE VOLTAGE RANGE – Volts
0
2834567
Figure 4. Input Common-Mode Voltage Range vs.
Supply Voltage
SUPPLY VOLTAGE – Volts
14
13
12
11
10
9
8
OUTPUT VOLTAGE SWING – V p-p
7
6
10 10k100 1k
VS = 7.5V
LOAD RESISTANCE –
Figure 5. Output Voltage Swing vs. Load Resistance
–4–
REV. A
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