Quad 125MHz Video Current Feedback Amplifier with Disable HA5024
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HA5024
Quad 125MHz Video Current Feedback Amplifier with Disable
HA5024 quad version popular Harris HA5020. features wide bandwidth high slew rate, optimized video applications gains between current feedback amplifier thus yields less bandwidth degradation high closed loop gains than voltage feedback amplifiers. differential gain phase, 0.1dB gain flatness, ability drive back terminated cables, make this amplifier ideal demanding video applications. HA5024 also features disable function that significantly reduces supply current while forcing output true high impedance state. This functionality allows video multiplexers implemented with single current feedback design allows user take advantage amplifier's bandwidth dependency feedback resistor. reducing bandwidth increased compensate decreases higher closed loop gains heavy output loads.
November 1996
Features
Quad Version HA-5020 Individual Output Enable/Disable Input Offset Voltage 800µV Wide Unity Gain Bandwidth 125MHz Slew Rate 475V/µs Differential Gain 0.03% Differential Phase. 0.03 Degrees Supply Current (per Amplifier) 7.5mA Protection. 4000V Guaranteed Specifications Supplies
Applications
Video Multiplexers; Video Switching Routing Video Gain Block Video Distribution Amplifier/RGB Amplifier Flash Driver Current Voltage Converter Medical Imaging Radar Imaging Systems
Ordering Information
PART NUMBER HA5024IP HA5024IB HA5024EVAL TEMP. RANGE (oC) PACKAGE PDIP SOIC PKG. E20.3 M20.3
High Speed Evaluation Board
Pinout
HA5024 (PDIP, SOIC) VIEW
OUT1 -IN1 +IN1 DIS1 DIS2 +IN2 -IN2 OUT4
-IN4 +IN4 DIS4 DIS3
+IN3 -IN3 OUT3
OUT2
CAUTION: These devices sensitive electrostatic discharge. Users should follow proper Handling Procedures. Copyright
Harris Corporation 1996
File Number
3550.3
3-370
HA5024
Absolute Maximum Ratings
Voltage Between Terminals Input Voltage (Note ±VSUPPLY Differential Input Voltage. Output Current (Note Short Circuit Protected Rating (Note Human Body Model (Per MIL-STD-883 Method 3015.7) 2000V
Thermal Information
Thermal Resistance (Typical, Note (oC/W) PDIP Package SOIC Package Maximum Junction Temperature (Note 175oC Maximum Junction Temperature (Plastic Package, Note 150oC Maximum Storage Temperature Range -65oC 150oC Maximum Lead Temperature (Soldering 10s) 300oC (SOIC Lead Tips Only)
Operating Conditions
Temperature Range -40oC 85oC Supply Voltage Range (Typical) ±4.5V ±15V
CAUTION: Stresses above those listed "Absolute Maximum Ratings" cause permanent damage device. This stress only rating operation device these other conditions above those indicated operational sections this specification implied.
NOTES: Maximum power dissipation, including output load, must designed maintain junction temperature below 175oC die, below 150oC plastic packages. Application Information section safe operating area information. measured with component mounted evaluation board free air. non-inverting input unused amplifiers must connected GND. Output protected short circuits ground. Brief short circuits ground will degrade reliability, however, continuous (100% duty cycle) output current should exceed 15mA maximum reliability.
Electrical Specifications
VSUPPLY ±5V, 400, 10pF,Unless Otherwise Specified (NOTE TEST TEMP. LEVEL (oC)
PARAMETER INPUT CHARACTERISTICS Input Offset Voltage (VIO)
TEST CONDITIONS
UNITS
Full Full Full Full Full Full Full Full Full 25,85 25,85 Full Full
±2.5
0.15
µV/oC µA/V µA/V µA/V µA/V µA/V µA/V µA/V µA/V
Delta Between Channels Average Input Offset Voltage Drift Common Mode Rejection Ratio Note
Power Supply Rejection Ratio
±3.5V ±6.5V
Input Common Mode Range Non-Inverting Input (+IN) Current
Note
Common Mode Rejection (+IBCMR Power Supply Rejection
Note
±3.5V ±6.5V
Inverting Input (-IN) Current
Delta BIAS Current Between Channels
Common Mode Rejection
Note
Power Supply Rejection
±3.5V ±6.5V
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HA5024
Electrical Specifications
VSUPPLY ±5V, 400, 10pF,Unless Otherwise Specified (Continued) (NOTE TEST TEMP. LEVEL (oC)
PARAMETER Input Noise Voltage +Input Noise Current -Input Noise Current TRANSFER CHARACTERISTICS Transimpedence
TEST CONDITIONS 1kHz 1kHz 1kHz
25.0
UNITS nV/Hz pA/Hz pA/Hz
Note
Full Full Full
0.85
Open Loop Voltage Gain
400, VOUT ±2.5V 100, VOUT ±2.5V
Open Loop Voltage Gain
OUTPUT CHARACTERISTICS Output Voltage Swing Output Current Output Current, Short Circuit Output Current, Disabled (Note Output Disable Time Output Enable Time Output Capacitance Disabled POWER SUPPLY CHARACTERISTICS Supply Voltage Range Quiescent Supply Current Supply Current, Disabled Disable Input Current Minimum Current Disable Maximum Current Enable CHARACTERISTICS Slew Rate Full Power Bandwidth Rise Time Fall Time Propagation Delay Overshoot -3dB Bandwidth Settling Time Settling Time 0.25% VOUT 100mV Output Step Output Step Note Note Note Note Note V/µs DISABLE DISABLE Note Note Full Full Full Full Full mA/Op mA/Op ±2.5V, VOUT DISABLE VOUT ±2.5V, Note Note Note Full Full Full Full ±2.5 ±2.5 ±16.6 ±3.0 ±3.0 ±20.0
CHARACTERISTICS 681) Slew Rate Full Power Bandwidth Note Note V/µs
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HA5024
Electrical Specifications
VSUPPLY ±5V, 400, 10pF,Unless Otherwise Specified (Continued) (NOTE TEST TEMP. LEVEL (oC) VOUT 100mV Output Step Output Step 5MHz 20MHz CHARACTERISTICS +10, 383) Slew Rate Full Power Bandwidth Rise Time Fall Time Propagation Delay Overshoot -3dB Bandwidth Settling Time Settling Time 0.1% VIDEO CHARACTERISTICS Differential Gain (Note Differential Phase (Note NOTES: ±2.5V. -40oC Product tested ±2.25V because short test duration does allow self heating. 100, 2.5V. This minimum current which must pulled Disable order disable output. output considered disabled when -10mV VOUT +10mV. This maximum current that pulled Disable with HA5024 remaining enabled. HA5024 considered disabled when supply current decreased least 0.5mA. VOUT switches from +2V, from -2V. Specification from points. Slew Rate FPBW PEAK PEAK 100, VOUT Measured from points rise/fall times; from points input output propagation delay. Production Tested; Typical Guaranteed Limit based characterization; Design Typical information only. +2V, DISABLE Measured from point DISABLE VOUT +2V, DISABLE +5V. Measured from point DISABLE VOUT Force VOUT from ±2.5V, 50ns, DISABLE Measured with VM700A video tester using NTC-7 composite VITS. VOUT ±2.5V. -40oC Product tested VOUT ±2.25V because short test duration does allow self heating. 0.03 0.03 Degrees VOUT 100mV Output Step Output Step Note Note Note Note Note V/µs
PARAMETER Rise Time Fall Time Propagation Delay Overshoot -3dB Bandwidth Settling Time Settling Time 0.25% Gain Flatness
TEST CONDITIONS Note Note Note
0.02 0.07
UNITS
3-373
HA5024 Test Circuits Waveforms
HP4195 NETWORK ANALYZER
FIGURE TEST CIRCUIT TRANSIMPEDANCE MEASUREMENTS
VOUT
VOUT
FIGURE SMALL SIGNAL PULSE RESPONSE CIRCUIT
FIGURE LARGE SIGNAL PULSE RESPONSE CIRCUIT
Vertical Scale: 100mV/Div., VOUT 100mV/Div. Horizontal Scale: 20ns/Div. FIGURE SMALL SIGNAL RESPONSE
Vertical Scale: 1V/Div., VOUT 1V/Div. Horizontal Scale: 50ns/Div. FIGURE LARGE SIGNAL RESPONSE
3-374
Schematic
(One Amplifier Four)
2.5K QP11 QP18 QP16 QP20 QP10 QN12 QP12 QP13 QN13 1.4pF QP17 QN17 1.4pF QN15 QN10 QN14 QN16 QN18 QN20 QN19 QN21 QP15 QP14 QP19
1.25K
HA5024
3-375
QN11
HA5024 Application Information
Optimum Feedback Resistor plots inverting non-inverting frequency response, Figure Figure Typical Performance Curves section, illustrate performance HA5024 various closed loop gain configurations. Although bandwidth dependency closed loop gain isn't severe that voltage feedback amplifier, there appreciable decrease bandwidth higher gains. This decrease minimized taking advantage current feedback amplifier's unique relationship between bandwidth current feedback amplifiers require feedback resistor, even unity gain applications, conjunction with internal compensation capacitor, sets dominant pole frequency response. Thus, amplifier's bandwidth inversely proportional HA5024 design optimized 1000 gain Decreasing unity gain application decreases stability, resulting excessive peaking overshoot. higher gains amplifier more stable, decreased trade-off stability bandwidth. table below lists recommended values various gains, expected bandwidth.
GAIN (ACL) 1000 1000 BANDWIDTH (MHz)
MAX. AMBIENT TEMPERATURE
Driving Capacitive Loads
Capacitive loads will degrade amplifier's phase margin resulting frequency response peaking possible oscillations. most cases oscillation avoided placing isolation resistor series with output shown Figure
VOUT
FIGURE PLACEMENT OUTPUT ISOLATION RESISTOR,
selection criteria isolation resister highly dependent load, been determined good starting value.
Power Dissipation Considerations
high supply current inherent quad amplifiers, care must taken insure that maximum junction temperature (TJ, Absolute Maximum Ratings) exceeded. Figure shows maximum ambient temperature versus supply voltage available package styles (Plastic DIP, SOIC). ±5VDC quiescent operation both package styles operated over full industrial range -40oC 85oC. recommended that thermal calculations, which take into account output power, performed designer.
SUPPLY VOLTAGE (±V) SOIC PDIP
Board Layout
frequency response this amplifier depends greatly amount care taken designing board. inductance components such chip resistors chip capacitors strongly recommended. leaded components used leads must kept short especially power supply decoupling components those components connected inverting input. Attention must given decoupling power supplies. large value (10µF) tantalum electrolytic capacitor parallel with small value (0.1µF) chip capacitor works well most cases. ground plane strongly recommended control noise. Care must also taken minimize capacitance ground seen amplifier's inverting input (-IN). larger this capacitance, worse gain peaking, resulting pulse overshoot possible instability. recommended that ground plane removed under traces connected -IN, that connections kept short possible minimize capacitance from this node ground.
FIGURE MAXIMUM OPERATING AMBIENT TEMPERATURE SUPPLY VOLTAGE
Enable/Disable Function
When enabled amplifier functions normal current feedback amplifier with data electrical specifications table being valid applicable. When disabled amplifier output assumes true high impedance state supply current reduced significantly.
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HA5024
circuit shown Figure simplified schematic enable/disable function. large value resistors series with DISABLE makes appear current source driver. When driver pulls this current flows into driver. This current, which large 350µA when external circuit process variables their extremes, required insure that point achieves proper potential disable output.The driver must have compliance capability sinking this current. When DISABLE driven with dedicated gate. maximum level output voltage gate, 0.4V, enough compliance insure that amplifier will always disabled even though will turn gate will sink enough current keep point proper voltage. When greater than DISABLE should driven with open collector device that breakdown rating greater than Referring Figure seen that will pull-up resistor +VCC DISABLE left open. those cases where enable/disable function required circuits some circuits permanently enabled letting DISABLE float. driver used enable/disable level, sure that driver does sink more than 20µA when DISABLE high level. gates, especially CMOS versions, violate this criteria permissible control enable/disable function with TTL.
+VCC ENABLE/DISABLE INPUT QP18 VIDEO INPUT VIDEO INPUT
equivalent used select channels logic must break before make. When these conditions satisfied HA5024IP often used remote video multiplexer, multiplexer extended adding more amplifier ICs. Impedance Multiplexer common problems surface when multiplex multiple high speed signals into impedance source such converter. first problem source impedance which tends make amplifiers oscillate causes gain errors. second problem multiplexer which supplies gain, introduces kinds distortion limits frequency response. Using amps which have enable/disable function, such HA5024, eliminates multiplexer problems because external chip needed, HA5024 drive impedance (large capacitance) loads series isolation resistor used.
VIDEO INPUT 2000 2000 VIDEO OUTPUT LOAD
FIGURE SIMPLIFIED SCHEMATIC ENABLE/DISABLE FUNCTION
2000
Typical Applications
Four Channel Video Multiplexer Referring amplifier Figure terminates cable characteristic impedance back terminates cable characteristic impedance. amplifier gain configuration yield overall network gain when driving double terminated cable. value changed different network gain desired. holds disable ground thus inhibiting amplifier until switch, thrown position position switch pulls disable plus supply rail thereby enabling amplifier. Since actual signal switching takes place within amplifier, differential gain phase parameters, which 0.03% 0.03 degrees respectively, determine circuit's performance. other three circuits, through U1D, operate similar manner. When plus supply rail disable driven dedicated gate discussed earlier. multiplexer
2000
0.1µF
10µF
0.1µF
10µF
NOTES: HA5024IP. resistors break before make. ground plane. FIGURE FOUR CHANNEL VIDEO MULTIPLEXER
3-377
HA5024
Referring Figure both inputs terminated their characteristic impedance; typical video applications. Since drivers usually terminated their characteristic impedance input gain 0.5, thus amplifiers, configured gain circuit gain equal one. Resistors determine amplifier gain, different gain desired should changed according equation R3/R2). sets frequency response amplifier should refer manufacturers data sheet before changing value. asymmetrical charge/discharge time circuit which configures break before make switch prevent both amplifiers from being active simultaneously. this design extended more channels drive logic must designed break before make. enclosed feedback loop amplifier that large open loop amplifier gain will present load with small closed loop output impedance while keeping amplifier stable values load capacitance. circuit shown Figure tested full range capacitor values with oscillations being observed; thus, problem been solved.The frequency gain characteristics circuit those amplifier independent multiplexing action; thus, problem been solved. multiplexer transition time approximately 15µs with component values shown.
INPUT 1N4148 2000 0.047µF CHANNEL SWITCH 0.01µF
INPUT
OUTPUT
2000 INHIBIT 100K 0.047µF
0.01µF
NOTES: HA5022/24. CD4011.
1N4148
FIGURE IMPEDANCE MULTIPLEXER
Typical Performance Curves
NORMALIZED GAIN (dB) FREQUENCY (MHz) VOUT 0.2VP-P 10pF
VSUPPLY ±5V, 400, 25oC, Unless Otherwise Specified
NORMALIZED GAIN (dB) FREQUENCY (MHz) VOUT 0.2VP-P 10pF
FIGURE NON-INVERTING FREQUENCY RESPONSE
FIGURE INVERTING FREQUENCY RESPONSE
3-378
HA5024 Typical Performance Curves
VSUPPLY ±5V, 400, 25oC, Unless Otherwise Specified (Continued)
-3dB BANDWIDTH (MHz) VOUT 0.2VP-P 10pF
NONINVERTING PHASE (DEGREES)
-135 -100 -225 -270 -315 -360 VOUT 0.2VP-P 10pF FREQUENCY (MHz) -10, +10,
-135 -180
INVERTING PHASE (DEGREES)
GAIN PEAKING 1100 1300 FEEDBACK RESISTOR 1500
FIGURE PHASE RESPONSE FUNCTION FREQUENCY
-3dB BANDWIDTH (MHz) VOUT 0.2VP-P 10pF -3dB BANDWIDTH GAIN PEAKING (dB)
FIGURE BANDWIDTH GAIN PEAKING FEEDBACK RESISTANCE
-3dB BANDWIDTH (MHz)
-3dB BANDWIDTH
GAIN PEAKING (dB)
GAIN PEAKING VOUT 0.2VP-P 10pF
GAIN PEAKING 1100
LOAD RESISTOR
1000
FEEDBACK RESISTOR
FIGURE BANDWIDTH GAIN PEAKING FEEDBACK RESISTANCE
VOUT 0.2VP-P 10pF -3dB BANDWIDTH (MHz)
FIGURE BANDWIDTH GAIN PEAKING LOAD RESISTANCE
VOUT 0.1VP-P 10pF VSUPPLY ±5V,
OVERSHOOT
VSUPPLY ±15V, VSUPPLY ±5V, VSUPPLY ±15V,
FEEDBACK RESISTOR
LOAD RESISTANCE 1000
FIGURE BANDWIDTH FEEDBACK RESISTANCE
FIGURE SMALL SIGNAL OVERSHOOT LOAD RESISTANCE
3-379
GAIN PEAKING (dB)
-3dB BANDWIDTH
HA5024 Typical Performance Curves
0.10 FREQUENCY 3.58MHz 0.08 DIFFERENTIAL GAIN DIFFERENTIAL PHASE (DEGREES)
VSUPPLY ±5V, 400, 25oC, Unless Otherwise Specified (Continued)
0.08 FREQUENCY 3.58MHz
0.06
0.06
0.04
0.04
0.02 0.00
0.02 0.00 SUPPLY VOLTAGE (±V)
SUPPLY VOLTAGE (±V)
FIGURE DIFFERENTIAL GAIN SUPPLY VOLTAGE
VOUT 2.0VP-P 30pF REJECTION RATIO (dB) DISTORTION (dBc) ORDER
FIGURE DIFFERENTIAL PHASE SUPPLY VOLTAGE
0.001
CMRR
NEGATIVE PSRR POSITIVE PSRR 0.01 FREQUENCY (MHz)
FREQUENCY (MHz)
FIGURE DISTORTION FREQUENCY
FIGURE REJECTION RATIOS FREQUENCY
VOUT 1.0VP-P PROPAGATION DELAY (ns) PROPAGATION DELAY (ns)
RLOAD VOUT 1.0VP-P +10,
TEMPERATURE (oC)
SUPPLY VOLTAGE (±V)
FIGURE PROPAGATION DELAY TEMPERATURE
FIGURE PROPAGATION DELAY SUPPLY VOLTAGE
3-380
HA5024 Typical Performance Curves
VOUT 20VP-P NORMALIZED GAIN (dB) SLEW RATE (V/µs) TEMPERATURE (oC) SLEW RATE SLEW RATE
VSUPPLY ±5V, 400, 25oC, Unless Otherwise Specified (Continued)
-0.2 -0.4 -0.6 -0.8 -1.0 -1.2 FREQUENCY (MHz) +10, VOUT 0.2VP-P 10pF
FIGURE SLEW RATE TEMPERATURE
NORMALIZED GAIN (dB) -0.2 -0.4 -0.6 -0.8 -1.0 -1.2 FREQUENCY (MHz) VOUT 0.2VP-P 10pF
FIGURE NON-INVERTING GAIN FLATNESS FREQUENCY
+10,
1000
+INPUT NOISE CURRENT INPUT NOISE VOLTAGE
0.01
FREQUENCY (kHz)
FIGURE INVERTING GAIN FLATNESS FREQUENCY
FIGURE INPUT NOISE CHARACTERISTICS
(mV)
BIAS CURRENT (µA)
TEMPERATURE (oC) TEMPERATURE (oC)
FIGURE INPUT OFFSET VOLTAGE TEMPERATURE
FIGURE +INPUT BIAS CURRENT TEMPERATURE
3-381
CURRENT NOISE (pA/Hz)
VOLTAGE NOISE (nV/Hz)
-INPUT NOISE CURRENT
HA5024 Typical Performance Curves
VSUPPLY ±5V, 400, 25oC, Unless Otherwise Specified (Continued)
4000
TRANSIMPEDANCE
BIAS CURRENT (µA)
3000
2000
1000
TEMPERATURE (oC)
TEMPERATURE (oC)
FIGURE -INPUT BIAS CURRENT TEMPERATURE
FIGURE TRANSIMPEDANCE TEMPERATURE
REJECTION RATIO (dB) +PSRR
125oC (mA)
55oC
-PSRR -100 CMRR
25oC SUPPLY VOLTAGE (±V)
TEMPERATURE (oC)
FIGURE SUPPLY CURRENT SUPPLY VOLTAGE
FIGURE REJECTION RATIO TEMPERATURE
SUPPLY CURRENT (mA)
+10V
+15V OUTPUT SWING
DISABLE INPUT VOLTAGE
TEMPERATURE (oC)
FIGURE SUPPLY CURRENT DISABLE INPUT VOLTAGE
FIGURE OUTPUT SWING TEMPERATURE
3-382
HA5024 Typical Performance Curves
±15V VOUT (VP-P) ±10V (mV)
VSUPPLY ±5V, 400, 25oC, Unless Otherwise Specified (Continued)
±4.5V
0.01
0.10 1.00 10.00 LOAD RESISTANCE TEMPERATURE (oC)
FIGURE OUTPUT SWING LOAD RESISTANCE
FIGURE INPUT OFFSET VOLTAGE CHANGE BETWEEN CHANNELS TEMPERATURE
BIAS CURRENT (µA)
(mA) 25oC
-55oC
125oC
TEMPERATURE (oC)
SUPPLY VOLTAGE (±V)
FIGURE INPUT BIAS CURRENT CHANGE BETWEEN CHANNELS TEMPERATURE
FIGURE DISABLE SUPPLY CURRENT SUPPLY VOLTAGE
VOUT 2VP-P SEPARATION (dBc) ENABLE TIME (ns)
DISABLE -0.5 DISABLE ENABLE ENABLE
DISABLE TIME (µs)
FREQUENCY (MHz)
-2.5 -2.0 -1.5 -1.0
OUTPUT VOLTAGE
FIGURE CHANNEL SEPARATION FREQUENCY
FIGURE ENABLE/DISABLE TIME OUTPUT VOLTAGE
3-383
HA5024 Typical Performance Curves
VSUPPLY ±5V, 400, 25oC, Unless Otherwise Specified (Continued)
FEEDTHROUGH (dB)
DISABLE 5VP-P
TRANSIMPEDANCE
0.01 0.001 PHASE ANGLE (DEGREES)
FREQUENCY (MHz)
0.001
0.01
FREQUENCY (MHz)
-135
FIGURE DISABLE FEEDTHROUGH FREQUENCY
FIGURE TRANSIMPEDANCE FREQUENCY
TRANSIMPEDANCE
PHASE ANGLE (DEGREES) 0.01 0.001 -135 0.001 0.01 FREQUENCY (MHz)
FIGURE TRANSIMPEDENCE FREQUENCY
3-384
HA5024 Characteristics
DIMENSIONS: 2680µm 2600µm 483µm METALLIZATION: Type: Metal AlCu (1%) Thickness: Metal Type: Metal AlCu (1%) Thickness: Metal SUBSTRATE POTENTIAL (Powered Up): VPASSIVATION: Type: Nitride Thickness: TRANSISTOR COUNT: PROCESS: High Frequency Bipolar Dielectric Isolation
Metallization Mask Layout
HA5024
-IN1 OUT1 OUT4 -IN4
+IN1
+IN4
DIS1
DIS4
DIS2
DIS3
+IN2
+IN3
-IN2
OUT2
OUT3
-IN3
3-385
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