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HA5022 데이터시트 PDF




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부품번호 HA5022 기능
기능 Dual/ 125MHz/ Video Current Feedback Amplifier with Disable
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HA5022 데이터시트, 핀배열, 회로
Data Sheet
HA5022
May 1999 File Number 3392.6
Dual, 125MHz, Video Current Feedback
Amplifier with Disable
The HA5022 is a dual version of the popular Intersil HA5020.
It features wide bandwidth and high slew rate, and is
optimized for video applications and gains between 1 and
10. It is a current feedback amplifier and thus yields less
bandwidth degradation at high closed loop gains than
voltage feedback amplifiers.
The low differential gain and phase, 0.1dB gain flatness, and
ability to drive two back terminated 75cables, make this
amplifier ideal for demanding video applications.
The HA5022 also features a disable function that
significantly reduces supply current while forcing the output
to a true high impedance state. This functionality allows 2:1
video multiplexers to be implemented with a single IC.
The current feedback design allows the user to take
advantage of the amplifier’s bandwidth dependency on the
feedback resistor. By reducing RF, the bandwidth can be
increased to compensate for decreases at higher closed
loop gains or heavy output loads.
Ordering Information
PART NUMBER
HA5022IP
HA5022IB
TEMP.
RANGE (oC)
PACKAGE
-40 to 85 16 Ld PDIP
-40 to 85 16 Ld SOIC
PKG.
NO.
E16.3
M16.15
HA5022EVAL
High Speed Op Amp DIP Evaluation Board
Features
• Dual Version of 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
• ESD Protection. . . . . . . . . . . . . . . . . . . . . . . . . . . . 4000V
• Guaranteed Specifications at ±5V Supplies
Applications
• Video Multiplexers; Video Switching and Routing
• Video Gain Block
• Video Distribution Amplifier/RGB Amplifier
• Flash A/D Driver
• Current to Voltage Converter
• Medical Imaging
• Radar and Imaging Systems
Pinout
HA5022
(PDIP, SOIC)
TOP VIEW
-IN1 1
+IN1 2
DIS1 3
V- 4
DIS2 5
+IN2 6
-IN2 7
NC 8
-
+
+-
16 OUT1
15 NC
14 NC
13 V+
12 NC
11 NC
10 OUT2
9 NC
1 CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
http://www.intersil.com or 407-727-9207 | Copyright © Intersil Corporation 1999




HA5022 pdf, 반도체, 판매, 대치품
HA5022
Electrical Specifications
PARAMETER
VSUPPLY = ±5V, RF = 1k, AV = +1, RL = 400Ω, CL 10pF, Unless Otherwise Specified (Continued)
TEST
CONDITIONS
(NOTE 11)
TEST
TEMP.
LEVEL
(oC)
MIN TYP MAX UNITS
AC CHARACTERISTICS (AV = +2, RF = 681)
Slew Rate
Note 8
B
25
- 475 -
V/µs
Full Power Bandwidth
Note 9
B
25
- 26 -
MHz
Rise Time
Note 10
B 25 - 6 - ns
Fall Time
Note 10
B 25 - 6 - ns
Propagation Delay
Note 10
B 25 - 6 - ns
Overshoot
B 25 - 12 - %
-3dB Bandwidth
Settling Time to 1%
VOUT = 100mV
2V Output Step
B
25
- 95 -
MHz
B 25 - 50 - ns
Settling Time to 0.25%
2V Output Step
B 25 - 100 - ns
Gain Flatness
5MHz
B
25
- 0.02 -
dB
20MHz
B 25 - 0.07 - dB
AC CHARACTERISTICS (AV = +10, RF = 383)
Slew Rate
Note 8
B
25
350 475
-
V/µs
Full Power Bandwidth
Note 9
B
25
28 38
-
MHz
Rise Time
Note 10
B 25 - 8 - ns
Fall Time
Note 10
B 25 - 9 - ns
Propagation Delay
Note 10
B 25 - 9 - ns
Overshoot
B 25 - 1.8 - %
-3dB Bandwidth
Settling Time to 1%
VOUT = 100mV
2V Output Step
B
25
- 65 -
MHz
B 25 - 75 - ns
Settling Time to 0.1%
2V Output Step
B 25 - 130 - ns
VIDEO CHARACTERISTICS
Differential Gain (Note 15)
RL = 150
B 25 - 0.03 - %
Differential Phase (Note 15)
RL = 150
B 25 - 0.03 - Degrees
NOTES:
5. VCM = ±2.5V. At -40oC Product is tested at VCM = ±2.25V because short test duration does not allow self heating.
6. RL = 100, VIN = 2.5V. This is the minimum current which must be pulled out of the Disable pin in order to disable the output. The output is
considered disabled when -10mV VOUT +10mV.
7. VIN = 0V. This is the maximum current that can be pulled out of the Disable pin with the HA5022 remaining enabled. The HA5022 is
considered disabled when the supply current has decreased by at least 0.5mA.
8. VOUT switches from -2V to +2V, or from +2V to -2V. Specification is from the 25% to 75% points.
9. FPBW = 2-S---π-l--e-V--w--P----R-E---a-A---t-e-K-- ; VPEAK = 2V.
10. RL = 100, VOUT = 1V. Measured from 10% to 90% points for rise/fall times; from 50% points of input and output for propagation delay.
11. A. Production Tested; B. Typical or Guaranteed Limit based on characterization; C. Design Typical for information only.
12. VIN = +2V, DISABLE = +5V to 0V. Measured from the 50% point of DISABLE to VOUT = 0V.
13. VIN = +2V, DISABLE = 0V to +5V. Measured from the 50% point of DISABLE to VOUT = 2V.
14. VIN = 0V, Force VOUT from 0V to ±2.5V, tR = tF = 50ns, DISABLE = 0V.
15. Measured with a VM700A video tester using an NTC-7 composite VITS.
16. VOUT = ±2.5V. At -40oC Product is tested at VOUT = ±2.25V because short test duration does not allow self heating.
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HA5022 전자부품, 판매, 대치품
HA5022
Application Information
Optimum Feedback Resistor
The plots of inverting and non-inverting frequency response,
see Figure 11 and Figure 12 in the Typical Performance
Curves section, illustrate the performance of the HA5022 in
various closed loop gain configurations. Although the
bandwidth dependency on closed loop gain isn’t as severe
as that of a voltage feedback amplifier, there can be an
appreciable decrease in bandwidth at higher gains. This
decrease may be minimized by taking advantage of the
current feedback amplifier’s unique relationship between
bandwidth and RF. All current feedback amplifiers require a
feedback resistor, even for unity gain applications, and RF, in
conjunction with the internal compensation capacitor, sets
the dominant pole of the frequency response. Thus, the
amplifier’s bandwidth is inversely proportional to RF. The
HA5022 design is optimized for a 1000RF at a gain of +1.
Decreasing RF in a unity gain application decreases stability,
resulting in excessive peaking and overshoot. At higher
gains the amplifier is more stable, so RF can be decreased
in a trade-off of stability for bandwidth.
The table below lists recommended RF values for various
gains, and the expected bandwidth.
GAIN
(ACL)
-1
+1
+2
+5
+10
-10
RF ()
750
1000
681
1000
383
750
BANDWIDTH
(MHz)
100
125
95
52
65
22
PC Board Layout
The frequency response of this amplifier depends greatly on
the amount of care taken in designing the PC board. The
use of low inductance components such as chip resistors
and chip capacitors is strongly recommended. If leaded
components are used the leads must be kept short
especially for the power supply decoupling components and
those components connected to the inverting input.
Attention must be given to decoupling the power supplies. A
large value (10µF) tantalum or electrolytic capacitor in
parallel with a small value (0.1µF) chip capacitor works well
in most cases.
A ground plane is strongly recommended to control noise.
Care must also be taken to minimize the capacitance to
ground seen by the amplifier’s inverting input (-IN). The
larger this capacitance, the worse the gain peaking, resulting
in pulse overshoot and possible instability. It is
recommended that the ground plane be removed under
traces connected to -IN, and that connections to -IN be kept
as short as possible to minimize the capacitance from this
node to ground.
Driving Capacitive Loads
Capacitive loads will degrade the amplifier’s phase margin
resulting in frequency response peaking and possible
oscillations. In most cases the oscillation can be avoided by
placing an isolation resistor (R) in series with the output as
shown in Figure 6.
100
VIN +- R
VOUT
RT CL
RF
RI
FIGURE 6. PLACEMENT OF THE OUTPUT ISOLATION
RESISTOR, R
The selection criteria for the isolation resistor is highly
dependent on the load, but 27has been determined to be
a good starting value.
Power Dissipation Considerations
Due to the high supply current inherent in dual amplifiers,
care must be taken to insure that the maximum junction
temperature (TJ, see Absolute Maximum Ratings) is not
exceeded. Figure 7 shows the maximum ambient
temperature versus supply voltage for the available package
styles (PDIP, SOIC). At VS = ±5V quiescent operation both
package styles may be operated over the full industrial range
of -40oC to 85oC. It is recommended that thermal
calculations, which take into account output power, be
performed by the designer.
140
130 PDIP
120
110
100
90 SOIC
80
5
7 9 11
SUPPLY VOLTAGE (±V)
13
FIGURE 7. MAXIMUM OPERATING AMBIENT
TEMPERATURE vs SUPPLY VOLTAGE
15
Enable/Disable Function
When enabled the amplifier functions as a normal current
feedback amplifier with all of the data in the electrical
specifications table being valid and applicable. When
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