1
®HA-2841
50MHz, Fast Settling, Unity Gain Stable,
Video Operational Amplifier
The HA-2841 is a wideba nd, unity gain stable, operational
amplifier featuring a 50MHz unity gain band width, and
excellent DC specifications. This amplifier’s performance is
further enhanced through stable ope ration down to closed
loop gains of +1, the inclus ion of offset null controls, and by
its excellent video performance.
The capabilities of the HA-2841 are ideally suited for high
speed pulse and video amplifier circuits, where high slew
rates and wide bandwidth are required. Gain flatness of
0.05dB, combined with differential gain and phase
specifications of 0.03%, and 0.03 degrees, respectively,
make the HA-2841 ideal for component and composite video
applications.
A zener/nichrome based reference circuit, coupled with
advanced laser trimming techniques, yields a supply current
with a low temperature coefficient and low lot-to-lot
variability. Tighter ICC control translates to more consistent
AC parameters ensuring that units from each lot perform the
same way, and easing the task of designing systems for
wide temperature ranges. Critical AC parameters, Slew Rate
and Bandwidth, each vary by less than ±5% over the
industrial temperature range (see characteristic curves).
For military grade product, refer to the HA-2841/883 data
sheet.
HA-2841 (PDIP, SOIC)
TOP VIEW
Features
• Low Supply Current . . . . . . . . . . . . . . . . . . . . . . . . . 10mA
• Low AC Variability Over Process and Temperature
• Unity Gain Bandwidth. . . . . . . . . . . . . . . . . . . . . . . 50MHz
• Gain Flatness to 10MHz. . . . . . . . . . . . . . . . . . . . . 0.05dB
• High Slew Rate . . . . . . . . . . . . . . . . . . . . . . . . . . 240V/µs
• Low Offset Voltage. . . . . . . . . . . . . . . . . . . . . . . . . . . 1mV
• Fast Settling Time (0.1%). . . . . . . . . . . . . . . . . . . . . . 90ns
• Differential Gain/Phase . . . . . . . . . . 0.03%/0.03 Degrees
• Enhanced Replacement for AD841 and EL2041
Applications
• Pulse and Video Amplifiers
• Wideband Amplifiers
• High Speed Sample-Hold Circuits
• Fast, Precise D/A Converte rs
• High Speed A/D Input Buffer
BAL
-IN
+IN
V-
1
2
3
4
8
7
6
5
BAL
V+
OUT
NC
-
+
Part Number Information
PART NUMBER
(BRAND) TEMP.
RANGE (oC) PACKAGE PKG.
NO.
HA3-2841-5 0 to 75 8 Ld PDIP E8.3
HA9P2841-5
(H28415) 0 to 75 8 Ld SOIC M8.15
Data Sheet May 2003 FN2843.4
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 321-724-7143 | Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright © Intersil Americas Inc. 2003. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.
OBSOLETE PRODUCT
POSSIBLE SUBSTITUTE PRODUCT
HA-2842, HA-2544
2
Absolute Maximum Ratings Thermal Information
Voltage Between V+ and V- Terminals . . . . . . . . . . . . . . . . . . . 35V
Differential Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6V
Output Current (Note 3). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50mA
10mA (50% Duty Cycle)
Operating Conditions
Temperature Range
HA-2841-5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0oC to 75oC
Recommended Supply Voltage Range . . . . . . . . . . . ±6.5V to ±15V
Thermal Resistance (Typical, Note 2) θJA (oC/W)
8 Lead PDIP Package . . . . . . . . . . . . . . . . . . . . . . . 92
8 Lead SOIC Package . . . . . . . . . . . . . . . . . . . . . . . 157
Maximum Junction Temperature (Die, Note 1). . . . . . . . . . . . . .175oC
Maximum Junction Temperature (Plastic Package) . . . . . . . .150oC
Maximum Storage Temperature Range . . . . . . . . . -65oC to 150oC
Maximum Lead Temperature (Soldering 10s). . . . . . . . . . . . 300oC
(SOIC - Lead Tips Only)
CAUTION: Stresses above those listed in “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress only rating and operation of the
device at these or any other conditions above those indicated in the ope rational sections of this specification is not implied.
NOTES:
1. Maximum power dissipation, including output load, must be designed to maintain the maximum junction temperature below 150oC for plastic
packages.
2. θJA is measured with the component mounted on an evaluation PC board in free air.
3. VO = ±10V, RL unconnected. Output duty cycle must be reduced if IOUT >10mA.
Electrical Specifications VSUPPLY = ±15V, RL = 1kΩ , CL ≤ 10pF, Unless Otherwise Specified
PARAMETER TEST CONDITIONS TEMP.
(oC)
HA-2841-5
UNITSMIN TYP MAX
INPUT CHARACTERISTICS
Offset Voltage (Note 10) 25 - 1 3 mV
Full - - 6 mV
Average Offset Voltage Drift Full -14 -µV/oC
Bias Current (Note 10) 25 - 5 10 µA
Full - 8 15 µA
Average Bias Current Drift Full -45 -nA/oC
Offset Current 25 -0.5 1.0 µA
Full - - 1.5 µA
Input Resistance 25 -170 - kΩ
Input Capacitance 25 - 1 - pF
Common Mode Range Full ±10 - - V
Input Noise Voltage 10Hz to 1MHz 25 -16 -µVRMS
Input Noise Voltage (Note 10) f = 1kHz, RSOURCE = 0Ω25 -16 -
Input Noise Current (Note 10) f = 1kHz, RSOURCE = 10kΩ25 - 2 -
TRANSFER CHARACTERISTICS
Large Signal Voltage Gain VO = ±10V 25 25 50 -kV/V
Full 10 30 -kV/V
Common-Mode Rejection Ratio (Note 10) VCM = ±10V Full 80 95 -dB
Minimum Stable Gain 25 1 - - V/V
Gain Bandwidth Product (Notes 5, 10) 25 -50 -MHz
Gain Flatness to 5MHz (Note 10) RL ≥ 75Ω25 -±0.015 -dB
Gain Flatness to 10MHz (Note 10) RL ≥ 500Ω25 -±0.05 -dB
OUTPUT CHARACTERISTICS
Output Voltage Swing (Note 10) Full ±10 ±10.5 -V
Output Current (Note 10) Note 3 Full 15 30 -mA
Output Resistance 25 -8.5 -Ω
Full Power Bandwidth (Note 6) VO = ±10V 25 3.2 3.8 -MHz
Differential Gain (Note 10) Note 4 25 -0.03 - %
nV Hz⁄
pA Hz⁄
HA-2841
3
Differential Phase (Note 10) Note 4 25 -0.03 -Degrees
Harmonic Distortion (Note 10) VO = 2VP-P, f = 1MHz, AV = +1 25 ->83 -dBc
TRANSIENT RESPONSE (Note 7)
Rise Time 25 - 3 - ns
Overshoot 25 -33 -%
Slew Rate (Notes 9, 10) AV = +1 25 200 240 -V/µs
Settling Time 10V Step to 0.1% 25 -90 -ns
POWER REQUIREMENTS
Supply Current (Note 10) 25 -10 -mA
Full -10 11 mA
Power Supply Reje ct io n Ra tio (Not e 10 ) Note 8 Full 70 80 -dB
NOTES:
4. Differential gain and phase are measured with a VM700A video tester, using a NTC-7 composite VITS. RF = R1 = 1kΩ , RL = 700Ω.
5. AVCL = 1000, Measured at unity gain crossing.
6. Full Power Bandwidth guaranteed based on slew rate measurement using .
7. Refer to Test Circuit section of data sheet.
8. VSUPPLY = ±10V to ±20V.
9. This parameter is not tested. The limits are guaranteed based on lab characterization, and reflect lot-to-lot variation.
10. See “Typical Performance Curves” for more information.
Test Circuits and Waveforms
TEST CIRCUIT
LARGE SIGNAL RESPONSE SMALL SIGNAL RESPONSE
Electrical Specifications VSUPPLY = ±15V, RL = 1kΩ , CL ≤ 10pF, Unless Otherwise Specified (Continued)
PARAMETER TEST CONDITIONS TEMP.
(oC)
HA-2841-5
UNITSMIN TYP MAX
FPBW Slew Rate
2πVPEAK
---------------------------=VPEAK 10V=()
IN OUT
+
1kΩ
-NOTES:
11. VS = ±15V.
12. AV = +1.
13. CL < 10pF.
INPUT
OUTPUT
Input = 5V/Div.
Output = 5V/Div.
50ns/Div.
INPUT
OUTPUT
Input = 100mV/Div.
Output = 100mV/Div.
50ns/Div.
HA-2841
4
Typical Applications (Also see Application Note AN550)
Application 1 - High Power Amplifiers and Buffers
High power amplifiers and buffers are in use in a wide va rie ty
of applications. Many times the “high power” capabil ity is
needed to drive large capacitive loads as w ell as low value
resistive loads. In both cases the final d river stage is usually a
power transistor of some type, but because of their i nherently
low gain, several stages of pre- drivers are often required. The
HA-2841, with its 15mA output rating, is powerful enough to
drive a power transistor without additional stages of current
amplification. This capability is well demonstrated wi th the
high power buffer circuit in Figure 1.
The HA-284 1 acts as the pre-driver to the out pu t po w e r
transistor. Together, they form a uni ty gain buffer with the
ability to drive three 50Ω coaxial cables in parallel, each with
a capacitance of 2000pF. The total combined load is 16.6Ω
and 6000pF capacitance.
Application 2 - Video
One of the primary uses of the HA-2841 is in the area of
video applications. These applications include signal
construction, synchronization add ition and removal, as well
as signal modification. A wide bandwidth device such as the
HA-2841 is well suited for use in this class of amplifier. This,
however, is a more involved group of applications than
ordinary amplifier applicati ons since video signals contain
precise DC levels which must be retained.
The addition of a clamping circuit restores DC levels at the
output of an amplifier stage. The circuit shown in Figure 2
utilizes the HA-5320 sample and hold amplifier as the DC
clamp. Also shown is a 3.57MHz trap in series, which will
block the color burst portion of the video signal and allow the
DC level to be amplified and restored.
Prototyping Guidelines
For best overall performance in any application, it is
recommended that high frequency layout techniques be
used. This should include:
1. Mounting the device through a ground plane.
2. Connecting unused pins (NC) to the ground plane.
3. Mounting feedback components on Teflon standoffs
and/or locating these compon ents as close to the device
as possible.
4. Placing power supply decoupling capacitors from device
supply pins to ground.
SETTLING TIME TEST CIRCUIT SUGGESTED OFFSET VOLTAGE ADJUSTMENT
Test Circuits and Waveforms (Continued)
+
V-
V+
SETTLING
POINT
VOUT
VIN
5kΩ
-
5kΩ
2kΩ
2kΩ
NOTES:
14. AV = -1.
15. Load Capacitance should be less than 10pF.
16. Feedback and summing resistors must be matched to 0.1%.
17. Tektronix P6201 FET probe used at settling point.
18. HP5082-2810 clipping diodes recommended.
+
-
V-
5kΩ
V+
OUT
BAL
D2
HP2835
LOAD 16.6Ω; 6000pF
OR 12.5Ω; 6000pF
D1
HP2835
+
HA-2841
-R3
100Ω
50Ω
R1R2
1K 2N5886
532pF
D3
FIGURE 1. DRIVING POWER TRANSISTORS TO GAIN
ADDITIONAL CURRENT BOOSTING
HA-2841
1kΩ
1kΩ
1kΩ
1kΩ
1kΩ
75Ω
3.57MHz
TRAP
HA-5320
FIGURE 2. VIDEO DC RESTORER
HA-2841
5
Typical Performance Curves TA = 25oC, VSUPPLY = ±15V, RL = 1kΩ, CL < 10pF, Unless Otherwise Specified
FIGURE 3. FREQUENCY RESPONSE FOR VARIOUS GAINS FIGURE 4. GAIN BANDWIDTH PRODUCT vs SUPPLY VOLTAGE
FIGURE 5. GAIN BANDWIDTH PRODUCT vs TEMPERATURE FIGURE 6. CMRR vs FREQUENCY
FIGURE 7. PSRR vs FREQUENCY FIGURE 8. INPUT NOISE vs FREQUENCY
100
80
60
40
20
0
1K 10K 100K 1M 10M 100M 500M100 FREQUENCY (Hz)
0
90
180
GAIN (dB)
PHASE (DEGREE)
OPEN
LOOP AVCL
= 1000 AVCL
= 100 AVCL
= 10 AVCL
= 1
OPEN
LOOP AVCL
= 1000 AVCL
= 100 AVCL
= 10
AVCL = 1
55
45
35
GAIN BANDWIDTH PRODUCT (MHz)
6 7 8 9 10 11 12 13 14 15
SUPPLY VOLTAGE (±V)
30
40
50
60
65
55
40
35
-60 -40 -20 0 20 40 60 80 100 120 140
TEMPERATURE (oC)
GAIN BANDWIDTH PRODUCT (MHz)
30
45
50
60
100
90
80
70
60
50
40
30
CMRR (dB)
100 1K 10K 100K 1M 10M
FREQUENCY (Hz)
90
80
70
60
50
40
30
20
PSRR (dB)
100 1K 1M10K 10M100K
FREQUENCY (Hz)
±PSRR
120
90
60
30
40
30
20
10
0
NOISE CURRENT (pA/√Hz)
0
NOISE VOLTAGE (nV/√Hz)
10 100 1K 10K 100K
FREQUENCY (Hz)
NOISE CURRENT
NOISE VOLTAGE
HA-2841
6
FIGURE 9. SLEW RATE vs TEMPERATURE FIGURE 10. SLEW RATE vs SUPPLY VOLTAGE
FIGURE 11. INPUT OFFSET VOLTAGE AND INPUT BIAS
CURRENT vs TEMPERATURE FIGURE 12. SUPPLY CURRENT vs SUPPLY VOLTAGE
FIGURE 13. POSITIVE OUTPUT SWING vs TEMPERATURE FIGURE 14. NEGATIVE OUTPUT SWING vs TEMPERATURE
Typical Performance Curves TA = 25oC, VSUPPLY = ±15V, RL = 1kΩ, CL < 10pF, Unless Ot herwise Specified (Continued)
290
280
270
260
250
SLEW RATE (V/µs)
-60 -40 -20 0 20 40 60 80 100 120 140
TEMPERATURE (oC)
NEGATIVE
SLEW RATE
POSITIVE
SLEW RATE
290
280
270
260
250
240
SLEW RATE (V/µs)
7 8 9 1011 12 1314 15
SUPPLY VOLTAGE (±V)
NEGATIVE
SLEW RATE
POSITIVE
SLEW RATE
9.0
8.0
7.0
6.0
5.0
4.0
3.0
-60 -40 -20 0 20 40 60 80 100 120 140
TEMPERATURE (oC)
INPUT BIAS CURRENT (µA)
1.5
1.0
0.5
0.0
-0.5
-1.0
-1.5
INPUT OFFSET VOLTAGE (mV)
OFFSET
VOLTAGE
BIAS
CURRENT
12
10
8
6
4
2
5 6 7 8 9 10 11 12 13 14 15
SUPPLY VOLTAGE (±V)
SUPPLY CURRENT (mA)
125oC
-55oC
25οC
10
5
0
-60 -40 -20 0 20 40 60 80 100 120 140
TEMPERATURE (oC)
POSITIVE OUTPUT SWING (V)
2.5
7.5
12.5 ±15V, 150Ω±15V, 1kΩ
±8V, 75Ω
±8V, 150Ω±8V, 1kΩ
±15V, 75Ω
-60 -40 -20 0 20 40 60 80 100 120 140
TEMPERATURE (oC)
NEGATIVE OUTPUT SWING (V)
-2.5
-7.5
-12.5
-10
-5
0
±8V, 150Ω
±15V, 75Ω
±8V, 75Ω
±15V, 1kΩ
±15V, 150Ω
±8V, 1kΩ
HA-2841
7
FIGURE 15. MAXIMUM UNDISTORTED OUTPUT SWING vs
FREQUENCY FIGURE 16. TOTAL HARMONIC DISTORTION vs FREQUENCY
FIGURE 17. INTERMODULATION DISTORTION vs FREQUENCY
(TWO TONE) FIGURE 18. DIFFERENTIAL GAIN vs LOAD RESISTANCE
FIGURE 19. DIFFERENTIAL PHASE vs LOAD R ESIST ANCE FIGURE 20. GAIN FLATNESS vs FREQUENCY
Typical Performance Curves TA = 25oC, VSUPPLY = ±15V, RL = 1kΩ, CL < 10pF, Unless Ot herwise Specified (Continued)
1K 10K 100K 1M 10M 100M
FREQUENCY (Hz)
25
20
15
10
5
0
OUTPUT VOLTAGE SWING (VP-P)
VSUPPLY = ±15V
VSUPPLY = ±8V
-20
-30
-40
-50
-60
-70
-80
-90
THD (dBc)
100K 1M 10M
FREQUENCY (Hz)
VO = 10VP-P
VO = 0.5VP-P
VO = 1VP-P
VO = 2VP-P
-20
-30
-40
-50
-60
-70
-80
-90
THIRD INTERMOD PRODUCT (dBc)
500K 1M 10M
FREQUENCY (Hz)
VO = 5VP-P
VO = 2VP-P
VO = 1VP-P
VO = 0.5VP-P
VO = 0.25VP-P
100 200 300 400 500 600 700 800 900 1000
LOAD RESISTANCE (Ω)
0.16
0.14
0.12
0.10
0.08
0.06
0.04
0.02
DIFFEREN TIAL GAIN (%)
VSUPPLY = ±8V
VSUPPLY = ±10V
VSUPPLY = ±15V
100 200 300 400 500 600 700 800 900
0.22
0.20
0.18
0.16
0.14
0.12
0.10
0.08
0.06
0.04
0.02
LOAD RESISTANCE (Ω)
DIFFERENTIAL PHASE (DEGREES)
VSUPPLY = ±8V
VSUPPLY = ±10V
VSUPPLY = ±15V
10000
0.08
0.07
0.06
0.05
0.04
0.03
0.02
0.01
0.00 0 1M2M3M4M5M6M7M8M9M10M
FREQUENCY (Hz)
GAIN FLATNESS (±dB)
AVCL = 1 RL = 75Ω
RL = 150Ω
RL = 500Ω
RL = 1000Ω
HA-2841
8
All Intersil U.S. products are manufactured, assembled and tested utilizing ISO9000 quality systems.
Intersil Corporation’s quality certifications can be viewed at www.intersil.com/design/quality
Intersil products are sold by description only. Intersil Corporation reserves the right to make changes in circuit design, software and/or specifications at any time without
notice. Accordingly, the reader is cautioned to verify that data sheets are current before placing orders. Information furnished by Intersil is believed to be accurate and
reliable. However, no responsibility is assumed by Intersil or its subsidiaries for its use; nor for any infringements of patents or other rights of third parties which may result
from its use. No license is grant ed by impl icati on or ot herwise under any patent or patent rights of Intersil or its subsidiaries.
For information regarding Intersil Corporation and its products, see www.intersil.com
Die Characteristics
DIE DIMENSIONS:
77 mils x 81 mils x 19 mils
1960µm x 2060µm x 483µm
METALLIZATION:
Type: Aluminum, 1% Copper
Thickness: 16kÅ ±2kÅ
PASSIVATION:
Type: Nitride over Silox
Silox Thickness: 12kÅ ±2kÅ
Nitride thickness: 3.5kÅ ±1kÅ
SUBSTRATE POTENTIAL (Powered Up):
V-
TRANSISTOR COUNT:
43
PROCESS:
High Frequency Bipolar Dielectric Isolation
Metallization Mask Layout HA-2841
V+
OUT
BAL BAL
-IN
+IN
V-
HA-2841
