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PDF HFA1145 Data sheet ( Hoja de datos )
| Número de pieza | HFA1145 | |
| Descripción | High Speed/ Low Power/ Current Feedback Video Operational Amplifier with Output Disable | |
| Fabricantes | Intersil Corporation | |
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Data Sheet
June 1, 2006
HFA1145
FN3955.5
330MHz, Low Power, Current Feedback
Video Operational Amplifier with Output
Disable
The HFA1145 is a high speed, low power current feedback
amplifier built with Intersil’s proprietary complementary
bipolar UHF-1 process.
This amplifier features a TTL/CMOS compatible disable
control, pin 8, which when pulled low reduces the supply
current and forces the output into a high impedance state.
This allows easy implementation of simple, low power video
switching and routing systems. Component and composite
video systems also benefit from this op amp’s excellent gain
flatness, and good differential gain and phase specifications.
Multiplexed A/D applications will also find the HFA1145
useful as the A/D driver/multiplexer.
The HFA1145 is a low power, high performance upgrade for
the CLC410.
For Military grade product, please refer to the HFA1145/883
data sheet.
Ordering Information
www.DataSheet4U.com
PART
TEMP.
NUMBER
PART
RANGE
(BRAND) MARKING (°C)
PKG.
PACKAGE DWG. #
HFA1145IB
1145IB
-40 to 85 8 Ld SOIC M8.15
HFA1145IBZ
(Note)
1145IBZ
-40 to 85 8 Ld SOIC
(Pb-free)
M8.15
HFA1145IP
HFA1145IP -40 to 85 8 Ld PDIP
E8.3
HFA1145IPZ
(Note)
HFA1145IPZ -40 to 85 8 Ld PDIP*
(Pb-free)
E8.3
HFA11XXEVAL DIP Evaluation Board for High Speed Op Amps
Note: Requires a SOIC-to-DIP adapter. See
“Evaluation Board” section inside.
NOTE: Intersil Pb-free plus anneal products employ special Pb-free
material sets; molding compounds/die attach materials and 100%
matte tin plate termination finish, which are RoHS compliant and
compatible with both SnPb and Pb-free soldering operations. Intersil
Pb-free products are MSL classified at Pb-free peak reflow
temperatures that meet or exceed the Pb-free requirements of
IPC/JEDEC J STD-020.
*Pb-free PDIPs can be used for through hole wave solder processing
only. They are not intended for use in Reflow solder processing
applications.
Features
• Low Supply Current . . . . . . . . . . . . . . . . . . . . . . . . 5.8mA
• High Input Impedance . . . . . . . . . . . . . . . . . . . . . . . 1MΩ
• Wide -3dB Bandwidth. . . . . . . . . . . . . . . . . . . . . . 330MHz
• Very Fast Slew Rate. . . . . . . . . . . . . . . . . . . . . . 1000V/μs
• Gain Flatness (to 75MHz) . . . . . . . . . . . . . . . . . . ±0.1dB
• Differential Gain . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.02%
• Differential Phase . . . . . . . . . . . . . . . . . . . . . 0.03 Degrees
• Output Enable/Disable Time . . . . . . . . . . . . . 180ns/35ns
• Pin Compatible Upgrade for CLC410
• Pb-Free Plus Anneal Available (RoHS Compliant)
Applications
• Flash A/D Drivers
• Video Switching and Routing
• Professional Video Processing
• Video Digitizing Boards/Systems
• Multimedia Systems
• RGB Preamps
• Medical Imaging
• Hand Held and Miniaturized RF Equipment
• Battery Powered Communications
Pinout
HFA1145 (SOIC)
TOP VIEW
NC 1
-IN 2
+IN 3
V- 4
-
+
8 DISABLE
7 V+
6 OUT
5 NC
1 CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-468-3774 | Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright Intersil Americas Inc. 1999, 2004, 2006. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.
1 page  
HFA1145
Electrical Specifications
PARAMETER
VSUPPLY = ±5V, AV = +1, RF = 510Ω, RL = 100Ω, Unless Otherwise Specified (Continued)
TEST CONDITIONS
(NOTE 3)
TEST
LEVEL TEMP. (°C)
MIN
TYP MAX
UNITS
DISABLE Input Logic High Current
Output Disable Time (Note 6)
Output Enable Time (Note 6)
Disabled Output Capacitance
Disabled Output Leakage
Off Isolation
(VDISABLE = 0V, VIN = 1VP-P, Note 6)
VDISABLE = 5V
A Full - 1 15 μA
VIN = ±1V,
VDISABLE = 2.4V to 0V
B
25
- 35 -
ns
VIN = ±1V,
VDISABLE = 0V to 2.4V
B
25
- 180 -
ns
VDISABLE = 0V
B
25
- 2.5 -
pF
VDISABLE = 0V, VIN = 2V, A Full - 3 10 μA
VOUT = ±3V
At 5MHz
B
25
- -75 -
dB
At 25MHz
B
25
- -60 -
dB
POWER SUPPLY CHARACTERISTICS
Power Supply Range
C 25 ±4.5 - ±5.5 V
Power Supply Current (Note 6)
A 25 - 5.8 6.1 mA
A Full - 5.9 6.3 mA
NOTES:
3. Test Level: A. Production Tested; B. Typical or Guaranteed Limit Based on Characterization; C. Design Typical for Information Only.
4. Undershoot dominates for output signal swings below GND (e.g. 0.5VP-P), yielding a higher overshoot limit compared to the VOUT = 0 to 0.5V
condition. See the “Application Information” section for details.
5. Slew rates are asymmetrical if the output swings below GND (e.g. a bipolar signal). Positive unipolar output signals have symmetric positive and
negative slew rates comparable to the +SR specification. See the “Application Information” section, and the pulse response graphs for details.
6. See Typical Performance Curves for more information.
Application Information
Optimum Feedback Resistor
Although a current feedback amplifier’s 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 HFA1145 design is optimized
for RF = 510Ω at a gain of +2. Decreasing RF decreases
stability, resulting in excessive peaking and overshoot (Note:
Capacitive feedback will cause the same problems due to the
feedback impedance decrease at higher frequencies). At
higher gains, however, 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. For a gain of +1, a
resistor (+RS) in series with +IN is required to reduce gain
peaking and increase stability.
GAIN
(ACL)
-1
+1
+2
+5
+10
RF (Ω)
425
510 (+RS = 510Ω)
510
200
180
BANDWIDTH
(MHz)
300
270
330
300
130
Non-inverting Input Source Impedance
For best operation, the DC source impedance seen by the
non-inverting input should be ≥50Ω. This is especially
important in inverting gain configurations where the non-
inverting input would normally be connected directly to GND.
DISABLE Input TTL Compatibility
The HFA1145 derives an internal GND reference for the
digital circuitry as long as the power supplies are
symmetrical about GND. With symmetrical supplies the
digital switching threshold (VTH = (VIH + VIL)/2 = (2.0 +
0.8)/2) is 1.4V, which ensures the TTL compatibility of the
DISABLE input. If asymmetrical supplies (e.g. +10V, 0V) are
utilized, the switching threshold becomes:
VTH
=
V-----+-----+----V------
2
+
1.4 V
and the VIH and VIL levels will be VTH ± 0.6V, respectively.
5 FN3955.5
June 1, 2006
5 Page 
HFA1145
Typical Performance Curves VSUPPLY = ±5V, RF = 510Ω, TA = 25°C, RL = 100Ω, Unless Otherwise Specified (Continued)
AV = +2
0.8 VOUT = 2V
0.6
0.4
0.2
0.1
0
-0.2
-0.4
-0.6
-0.8
3 8 13 18 23 28 33 38 43 48
TIME (ns)
FIGURE 23. SETTLING RESPONSE
-30
AV = +2
-40
-50
-60
20MHz
10MHz
-70
-5
05
OUTPUT POWER (dBm)
10
15
FIGURE 24. SECOND HARMONIC DISTORTION vs POUT
-30
AV = +2
-40
-50
-60
20MHz
10MHz
-70
-5
0 5 10
OUTPUT POWER (dBm)
15
FIGURE 25. THIRD HARMONIC DISTORTION vs POUT
100 100
INI-
10 10
ENI
INI+
1
0.1 1
1
10 100
FREQUENCY (kHz)
FIGURE 27. INPUT NOISE CHARACTERISTICS
3.6
3.5 AV = -1
3.4
|-VOUT| (RL= 100Ω)
+VOUT (RL= 100Ω)
3.3
3.2
3.1
3.0 +VOUT (RL= 50Ω)
2.9
2.8
2.7 |-VOUT| (RL= 50Ω)
2.6
-50 -25 0 25 50 75 100 125
TEMPERATURE (°C)
FIGURE 26. OUTPUT VOLTAGE vs TEMPERATURE
6.1
6.0
5.9
5.8
5.7
5.6
3.5 4 4.5 5 5.5 6 6.5 7 7.5
POWER SUPPLY VOLTAGE (±V)
FIGURE 28. SUPPLY CURRENT vs SUPPLY VOLTAGE
11 FN3955.5
June 1, 2006
11 Page | ||
| Páginas | Total 13 Páginas | |
| PDF Descargar | [ Datasheet HFA1145.PDF ] | |
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