High Current Output, Triple Video Amplifier AD8023 CONFIGURATION

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High Current Output, Triple Video Amplifier AD8023 CONFIGURATION

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FEATURES Drives Output Drives Unlimited Capacitive Load High Current Output Drive: Excellent Video Specifications Gain Flatness 0.06% Differential Gain Error 0.02 Differential Phase Error Power Operates Supply 10.0 mA/Amplifier Power Supply Current High Speed Unity Gain Bandwidth 1200 Slew Rate Fast Settling Time (0.1%) High Speed Disable Function Turn-Off Time Easy Short Circuit Current Output Swing Rails APPLICATIONS Displays Video Line Driver Broadcast Professional Video Computer Video Plug-In Boards Consumer Video Amplifier Component Systems PRODUCT DESCRIPTION
High Current Output, Triple Video Amplifier AD8023
CONFIGURATION 14-Lead SOIC
DISABLE DISABLE DISABLE
AD8023
AD8023 uses maximum supply current 10.0 amplifier runs power supply. outputs each amplifier swing within volt either supply rail easily accommodate video signals. AD8023 unique among current feedback amps virtue large capacitive load drive with small series resistor, while still achieving rapid settling time. instance, settle 0.1% while driving capacitance. bandwidth along with 1200 V/µs slew rate make AD8023 useful high speed applications requiring single dual power supplies Furthermore, AD8023 contains high speed disable function each amplifier order power down amplifier high impedance output. This then used video multiplexing applications. AD8023 available industrial temperature range -40°C +85°C.
AD8023 high current output drive, high voltage output drive, triple video amplifier. Each amplifier output current optimized driving large capacitive loads. amplifiers current feedback amplifiers feature gain flatness while offering differential gain phase error 0.06% 0.02°.
Figure Pulse Response Driving Large Load Capacitor, 16.9
Figure Output Swing Voltage,
REV.
Information furnished Analog Devices believed accurate reliable. However, responsibility assumed Analog Devices use, infringements patents other rights third parties which result from use. license granted implication otherwise under patent patent rights Analog Devices. Technology Way, P.O. 9106, Norwood, 02062-9106, U.S.A. Tel: 781/329-4700 World Wide Site: http://www.analog.com Fax: 781/326-8703 Analog Devices, Inc., 2000
AD8023-SPECIFICATIONS
7.5, CLOAD RLOAD
unless otherwise noted)
Units V/µs
Model Conditions DYNAMIC PERFORMANCE Bandwidth Bandwidth (0.1 Slew Rate Settling Time 0.1% Peaking, Peaking, Step Step) CLOAD RLOAD +25°C +70°C, 16.9
AD8023A 1200
NOISE/HARMONIC PERFORMANCE Total Harmonic Distortion Input Voltage Noise Input Current Noise Differential Gain Differential Phase PERFORMANCE Input Offset Voltage Offset Drift Input Bias Current Input Bias Current Open-Loop Transresistance INPUT CHARACTERISTICS Input Resistance +Input -Input Input Capacitance Input Common-Mode Voltage Range Common-Mode Rejection Ratio Input Offset Voltage -Input Current +Input Current OUTPUT CHARACTERISTICS Output Voltage Swing Output Current Short-Circuit Current Capacitive Load Drive MATCHING CHARACTERISTICS Dynamic Crosstalk Input Offset Voltage -Input Bias Current POWER SUPPLY Operating Range Quiescent Current/Amplifier
MHz, (-IIN) 3.58 MHz, 3.58 MHz, TMIN TMAX TMIN TMAX TMIN TMAX TMIN TMAX
0.06 0.02
nV/Hz pA/Hz Degrees µV/°C
TMIN TMAX TMIN TMAX
µA/V µA/V
VOL-VEE VCC-VOH VOL-VEE VCC-VOH
1000
Single Supply Dual Supply TMIN TMAX Power-Down +4.2
10.0
REV.
AD8023
Model Conditions POWER SUPPLY (Continued) Power Supply Rejection Ratio Input Offset Voltage -Input Current +Input Current DISABLE CHARACTERISTICS Isolation Output Capacitance Turn-On Time Turn-Off Time Switching Threshold
Specifications subject change without notice.
AD8023A
Units µA/V µA/V
0.03 0.07
ABSOLUTE MAXIMUM RATINGS
Maximum Power Dissipation
Supply Voltage 15.5 Total Internal Power Dissipation Small Outline Watts (Observe Derating Curves) Input Voltage (Common Mode) Differential Input Voltage (Clamped) Output Voltage Limit Maximum Minimum Output Short Circuit Duration Observe Power Derating Curves Storage Temperature Range Package -65°C +125°C Operating Temperature Range AD8023A -40°C +85°C Lead Temperature Range (Soldering sec) +300°C
*Stresses above those listed under Absolute Maximum Ratings cause permanent damage device. This stress rating only; functional operation device these other conditions above those indicated operational section this specification implied. Exposure absolute maximum rating conditions extended periods affect device reliability.
maximum power that safely dissipated AD8023 limited associated rise junction temperature. maximum safe junction temperature plastic encapsulated parts determined glass transition temperature plastic, about 150°C. Temporarily exceeding this limit cause shift parametric performance change stresses exerted package. Exceeding junction temperature 175°C extended period result device failure. While AD8023 internally short circuit protected, this enough guarantee that maximum junction temperature exceeded under conditions. ensure proper operation, important observe derating curves. must also noted that (noninverting) gain configurations (with values gain resistor), high level input overdrive result large input error current, which result significant power dissipation input stage. This power must included when computing junction temperature rise total internal power.
+150
ORDERING GUIDE
Model AD8023AR AD8023ARREEL AD8023ARREEL7 AD8023ACHIPS Temperature Range Package Description Package Option
MAXIMUM POWER DISSIPATION Watts
-40°C +85°C 14-Lead Plastic SOIC R-14 -40°C +85°C Tape Reel R-14 -40°C +85°C Tape Reel -40°C +85°C R-14
14-LEAD SOIC
AMBIENT TEMPERATURE
Figure Maximum Power Dissipation Ambient Temperature
CAUTION (electrostatic discharge) sensitive device. Electrostatic charges high 4000 readily accumulate human body test equipment discharge without detection. Although AD8023 features proprietary protection circuitry, permanent damage occur devices subjected high energy electrostatic discharges. Therefore, proper precautions recommended avoid performance degradation loss functionality.
WARNING!
SENSITIVE DEVICE
REV.
AD8023
METALIZATION PHOTO
Contact factory latest dimensions. Dimensions shown inches (mm).
-IN1
DISABLE
DISABLE
DISABLE
0.0634 (1.61)
-IN3 0.0713 (1.81)
Typical Performance Characteristics
7.5V
Volts
COMMON-MODE VOLTAGE RANGE
SUPPLY VOLTAGE Volts
OUTPUT VOLTAGE SWING
LOAD RESISTANCE
Figure Input Common-Mode Voltage Range Supply Voltage
Figure Output Voltage Swing Load Resistance
REV.
AD8023
TOTAL SUPPLY CURRENT
INPUT BIAS CURRENT
SUPPLY VOLTAGE
Volts
TEMPERATURE
Figure Total Supply Current Supply Voltage
Figure Input Bias Current Temperature
SWING SWING LOAD
OUTPUT VOLTAGE SWING Vp-p
INPUT OFFSET VOLTAGE
2.5V
7.5V
SUPPLY VOLTAGE
Volts
TEMPERATURE
Figure Output Voltage Swing Supply Voltage
Figure Input Offset Voltage Temperature
7.5V
CLOSED-LOOP OUTPUT RESISTANCE
TOTAL SUPPLY CURRENT
TEMPERATURE 2.5V
2.5V
0.31
7.5V
FREQUENCY
Figure Total Supply Current Temperature
Figure Closed-Loop Output Resistance Frequency
REV.
AD8023
NOISE
CURRENT NOISE VOLTAGE NOISE
COMMON-MODE REJECTION
2.5V 7.5V
NOISE
NOISE
FREQUENCY
FREQUENCY
Figure Input Current Voltage Noise Frequency
Figure Common-Mode Rejection Frequency
SHORT CIRCUIT CURRENT
7.5V
POWER SUPPLY REJECTION
7.5V (+PSRR) 2.5V (-PSRR) 7.5V (-PSRR) 2.5V (+PSRR)
SOURCE SINK
TEMPERATURE
FREQUENCY
Figure Short Circuit Current Temperature
Figure Power Supply Rejection Ratio Frequency
7.5V
HARMONIC DISTORTION
OUTPUT RESISTANCE
7.5V
FREQUENCY
FREQUENCY
Figure Output Resistance Frequency, Disabled State
Figure Harmonic Distortion Frequency,
REV.
AD8023
100k
TRANSIMPEDANCE
100k FREQUENCY 100M
Figure Open-Loop Transimpedance Frequency
Figure Small Signal Pulse Response, Gain
1600
1600 1400 1200
1400 1200
SLEW RATE
SLEW RATE
1000 OUTPUT VOLTAGE STEP
1000
SUPPLY VOLTAGE
Figure Slew Rate Output Step Size
Figure Maximum Slew Rate Supply Voltage
Figure Large Signal Pulse Response, Gain
Figure Large Signal Pulse Response, Gain +10,
REV.
AD8023
CLOSED-LOOP GAIN (NORMALIZED)
CLOSED-LOOP GAIN (NORMALIZED)
GAIN FREQUENCY -180 2.5V PHASE 2.5V
PHASE SHIFT Degrees
GAIN 7.5V
7.5V
PHASE
2.5V
PHASE SHIFT Degrees
7.5V
7.5V
2.5V
-180 FREQUENCY
Figure Closed-Loop Gain Phase Frequency, +10,
Figure Closed-Loop Gain Phase Frequency,
CLOSED-LOOP GAIN (NORMALIZED)
GAIN FREQUENCY -180 PHASE 2.5V
PHASE SHIFT Degrees
7.5V
Figure Closed-Loop Gain Phase Frequency,
Figure Small Signal Pulse Response, Gain +10,
Figure Large Signal Pulse Response, Gain
Figure Small Signal Pulse Response, Gain
REV.
AD8023
CLOSED-LOOP GAIN (NORMALIZED) GAIN FREQUENCY 2.5V -180 PHASE 2.5V PHASE SHIFT Degrees 7.5V
where:
transcapacitance feedback resistor ideal closed loop gain noise gain inverting input resistance closed loop gain
bandwidth determined from this model This model will predict bandwidth within about correct value when load ±7.5 lower supply voltages there will slight decrease bandwidth. model accurate enough predict either phase behavior frequency response peaking AD8023. should noted that bandwidth affected attenuation finite input resistance. Also, open-loop output resistance about reduces bandwidth somewhat when driving load resistors less than about (Bandwidths will about greater load resistances above couple hundred ohms.)
Table Bandwidth Closed-Loop Gain Feedback Resistor, (SOIC) Volts Gain Ohms 2000 2000 1000
Figure Closed-Loop Gain Phase Frequency, -10,
General
AD8023 wide bandwidth, triple video amplifier that offers high level performance less than amplifier quiescent supply current. AD8023 achieves bandwidth excess MHz, with differential gain phase errors high output current making efficient video amplifier. AD8023's wide phase margin coupled with high output short circuit current make excellent choice when driving capacitive load designed offer outstanding functionality performance closed-loop inverting noninverting gains greater.
Choice Feedback Gain Resistors
Because current feedback amplifier, closed-loop bandwidth AD8023 customized using different values feedback resistor. Table shows typical bandwidths different supply voltages some useful closed-loop gains when driving load choice feedback resistor critical unless desired maintain widest, flattest frequency response. resistors recommended table (chip resistors) those that will result widest bandwidth without peaking. applications requiring best control bandwidth, resistors adequate. Resistor values widest bandwidth figures shown. Wider bandwidths than those table attained reducing magnitude feedback resistor expense increased peaking), while peaking reduced increasing magnitude feedback resistor. Increasing feedback resistor especially useful when driving large capacitive loads will increase phase margin closed-loop circuit. (Refer Driving Capacitive Loads section more information.) estimate bandwidth closed-loop gains greater, feedback resistors listed following table, following single pole model AD8023 used:
Driving Capacitive Loads
When used combination with appropriate feedback resistor, AD8023 will drive load capacitance without oscillation. general rule current feedback amplifiers that higher load capacitance, higher feedback resistor required stable operation. high open-loop transresistance inverting input current AD8023, large feedback resistor does result large closedloop gain errors. Additionally, high output short circuit current makes possible rapid voltage slewing large load capacitors. best combination wide bandwidth clean pulse response, small output series resistor also recommended. Table contains values feedback series resistors which result best pulse responses. Figure shows AD8023 driving capacitor through large voltage step with virtually overshoot. this case, large small signal pulse responses quite similar appearance.)
REV.
AD8023
AD8023
Figure Circuit Driving Capacitive Load
Table Recommended Feedback Series Resistors Capacitive Load Gain Ohms Ohms
Figure Overload Recovery, Gain +10,
noted warning under Maximum Power Dissipation, high level input overdrive high noninverting gain circuit result large current flow input stage. Though this current internally limited about effect total power dissipation significant.
Disable Mode Operation
Pulling voltage Disable pins about from negative supply will corresponding amplifier into disabled, powered down, state. this condition, amplifier's quiescent current drops about output becomes high impedance, there high level isolation from input output. case gain line driver example, impedance output node will about same resistor (the feedback plus gain resistors) parallel with capacitor. Leaving Disable disconnected (floating) will leave corresponding amplifier operational, enabled state. input impedance disable about parallel with picofarads. When driven with negative supply -7.5 about flows into disable pin. When disable pins driven complementary output CMOS logic, single supply, disable enable times about When operated dual supplies, level shifting will required from standard logic outputs Disable pins. Figure shows possible method, which results negligible increase switching time.
+7.5V
Figure Pulse Response Driving Large Load Capacitor. 16.9
Overload Recovery
three important overload conditions are: input commonmode voltage overdrive, output voltage overdrive, input current overdrive. When configured closed-loop gain, this amplifier will quickly recover from input common-mode voltage overdrive; typically under When configured higher gain, overloaded output, recovery time will also short. example, gain +10, with overdrive, recovery time AD8023 about (see Figure 31). higher overdrive, response somewhat slower. 100% overdrive, gain +10), recovery time about
DISABLE -7.5V HIGH AMPLIFIER ENABLED AMPLIFIER DISABLED
Figure Level Shifting Drive Disable Pins Dual Supplies
AD8023's input stages include protection from large differential input voltages that applied when disabled. Internal clamps limit this voltage about high input output isolation will maintained voltages below this limit.
-10-
REV.
AD8023
OUTLINE DIMENSIONS
Dimensions shown inches (mm).
14-Lead Plastic SOIC (R-14)
C3137-0-3/00 (rev. PRINTED U.S.A.
0.3444 (8.75) 0.3367 (8.55)
0.1574 (4.00) 0.1497 (3.80)
0.2440 (6.20) 0.2284 (5.80)
0.0098 (0.25) 0.0040 (0.10)
0.0688 (1.75) 0.0532 (1.35)
0.0196 (0.50) 0.0099 (0.25)
SEATING PLANE
0.0500 (1.27)
0.0192 (0.49) 0.0138 (0.35)
0.0099 (0.25) 0.0075 (0.19)
0.0500 (1.27) 0.0160 (0.41)
REV.
-11-

High Current Output, Triple Video Amplifier AD8023 CONFIGURATION

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