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ADA4862-3
High Speed, G = +2, Low Cost, Triple Op Amp
High Speed, G = +2,
Low Cost, Triple Op Amp
FEATURES
Ideal for RGB/HD/SD video
Supports 1080i/720p resolution
High speed
−3 dB bandwidth: 300 MHz
Slew rate: 750 V/μs
Settling time: 9 ns ( 0.5%)
0.1 dB flatness: 65 MHz
Differential gain: 0.02%
Differential phase: 0.03°
Wide supply range: 5 V to 12 V
Low power: 5.3 mA/amp
Low voltage offset (RTO): 3.5 mV (typ)
High output current: 25 mA
Also configurable for gains of +1, −1
Power-down
APPLICATIONS
Consumer video
Professional video
Filter buffers
PIN CONFIGURATION
POWER DOWN 1
POWER DOWN 2
POWER DOWN 3
+VS
VOUT2
–IN 2
+IN 2
–VS
+IN 1+IN 3
–IN 1–IN 3
VOUT1VOUT305600-001
Figure 1. 14-Lead SOIC (R-14)
GENERAL DESCRIPTION The ADA4862-3 (triple) is a low cost, high speed, internally
fixed, G = +2 op amp, which provides excellent overall
performance for high definition and RGB video applications.
The 300 MHz, G = +2, −3 dB bandwidth, and 750 V/μs slew
rate make this amplifier well suited for many high speed
applications. The ADA4862-3 can also be configured to
operate in gains of G = +1 and G = −1.
With its combination of low price, excellent differential gain
(0.02%), differential phase (0.03°), and 0.1 dB flatness out to
65 MHz, this amplifier is ideal for both consumer and
professional video applications.
The ADA4862-3 is designed to operate on supply voltages as
low as +5 V and up to ±5 V using only 5.3 mA/amp of supply
current. To further reduce power consumption, each amplifier
is equipped with a power-down feature that lowers the supply
current to 200 μA/amp. The ADA4862-3 also consumes less
board area because feedback and gain set resistors are on-chip.
Having the resistors on chip simplifies layout and minimizes the
required board space.
The ADA4862-3 is available in a 14-lead SOIC package and is
designed to work in the extended temperature range of −40°C
to +105°C.
FREQUENCY (MHz)
CLOSED-
OOP GAIN (10100
5.2Figure 2. Large Signal 0.1 dB Bandwidth for Various Supplies
TABLE OF CONTENTS Features..............................................................................................1
Applications.......................................................................................1
Pin Configuration.............................................................................1
General Description.........................................................................1
Revision History...............................................................................2
Specifications.....................................................................................3
Absolute Maximum Ratings............................................................5
Thermal Resistance......................................................................5
ESD Caution..................................................................................5
Typical Performance Characteristics.............................................6
Applications.....................................................................................11
Using the ADA4862-3 in Gains = +1, −1................................11
Video Line Driver.......................................................................13
Single-Supply Operation...........................................................13
Power Down................................................................................13
Layout Considerations...............................................................14
Power Supply Bypassing............................................................14
Outline Dimensions.......................................................................15
Ordering Guide..........................................................................15
REVISION HISTORY
8/05—Rev. 0 to Rev. A Changes to Ordering Guide..........................................................15
7/05—Revision 0: Initial Version
SPECIFICATIONS VS = +5 V (@TA = 25oC, G = +2, RL = 150 Ω, unless otherwise noted).
Table 1.
VS = ±5 V (@TA = +25oC, G = +2, RL = 150 Ω, unless otherwise noted).
Table 2. ABSOLUTE MAXIMUM RATINGS
Table 3. Stresses above those listed under Absolute Maximum Ratings
may cause permanent damage to the device. This is a stress
rating only; functional operation of the device at these or any
other conditions above those indicated in the operational
section of this specification is not implied. Exposure to absolute
maximum rating conditions for extended periods may affect
device reliability.
THERMAL RESISTANCE θJA is specified for the worst-case conditions, that is, θJA is
specified for device soldered in circuit board for surface-mount
packages.
Table 4. Thermal Resistance
Maximum Power Dissipation The maximum safe power dissipation for the ADA4862-3 is
limited by the associated rise in junction temperature (TJ) on
the die. At approximately 150°C, which is the glass transition
temperature, the plastic changes its properties. Even
temporarily exceeding this temperature limit may change the
stresses that the package exerts on the die, permanently shifting
the parametric performance of the amplifiers. Exceeding a
junction temperature of 150°C for an extended period can
result in changes in silicon devices, potentially causing
degradation or loss of functionality.
The power dissipated in the package (PD) is the sum of the
quiescent power dissipation and the power dissipated in the die due
to the amplifier’s drive at the output. The quiescent power is the
voltage between the supply pins (VS) × the quiescent current (IS).
PD = Quiescent Power + (Total Drive Power − Load Power)
OUT
OUTSSDRVIVP2⎟⎠⎜⎝×+×=
RMS output voltages should be considered.
Airflow increases heat dissipation, effectively reducing θJA.
In addition, more metal directly in contact with the package
leads and through holes under the device reduces θJA.
Figure 3 shows the maximum safe power dissipation in the
package vs. the ambient temperature for the 14-lead SOIC
(90°C/W) on a JEDEC standard 4-layer board. θJA values are
approximations.
AMBIENT TEMPERATURE (°C)
XIM
POW
ISSIPA
TION0.5
Figure 3. Maximum Power Dissipation vs. Temperature for a 4-Layer Board
ESD CAUTION ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily accumulate on
the human body and test equipment and can discharge without detection. Although this product features
proprietary ESD protection circuitry, permanent damage may occur on devices subjected to high energy
electrostatic discharges. Therefore, proper ESD precautions are recommended to avoid performance
degradation or loss of functionality.
TYPICAL PERFORMANCE CHARACTERISTICS
FREQUENCY (MHz)
CLOSED-
OOP GAIN (10100Figure 4. Small Signal Frequency Response for Various Supplies
0.11000
FREQUENCY (MHz)
CLOSED-
OOP GAIN (10100Figure 5. Large Signal Frequency Response for Various Supplies
FREQUENCY (MHz)
CLOSED-
OOP GAIN (10100
5.2Figure 6. Large Signal 0.1 dB Bandwidth for Various Supplies
–100OUTPUT VOLTAGE (mV)
= 5
OUTPUT VOLTAGE (V)
= 5
= 0Figure 7. Small Signal Transient Response for Various Supplies
OUTPUT VOLTAGE (V)
–15005600-016
Figure 8. Small Signal Transient Response for Various Capacitor Loads
OUTPUT VOLTAGE (V)
2.405600-014
Figure 9. Small Signal Transient Response for Various Capacitor Loads
OUTPUT VOLTAGE (V)
= 5V
OUTPUT VOLTAGE (V)
= 5V,
= 0V
–1.005600-010
Figure 10. Large Signal Transient Response for Various Supplies
OUTPUT VOLTAGE (V)
–1.005600-018
Figure 11. Large Signal Transient Response for Various Capacitor Loads
OUTPUT VOLTAGE (V)
1.505600-019
Figure 12. Large Signal Transient Response for Various Capacitor Loads
01000
TIME (ns)
OUTP
UT AND INP
T V
LTAGE
(V100200300400500600700800900
Figure 13. Input Overdrive Recovery
TIME (ns)
OUTP
UT AND INP
T V
LTAGE
(V100200300400500600700800900
Figure 14. Output Overdrive Recovery
TIME (ns)
OUT
AND V
OUT
ANDE
D (mVTIME (ns)
AND V
(V)
ANDE
D (m
–10
Figure 15. Settling Time Falling Edge
OUTPUT VOLTAGE STEP (V p-p)
SLEW
E (
0.51.01.52.02.53.03.54.04.5Figure 16. Slew Rate vs. Output Voltage
10010100MFREQUENCY (Hz)
VOLTA
GE N
OISE (
1001k10k100k1M10M
Figure 17. Voltage Noise vs. Frequency Referred to Output (RTO)
–1.01015202530354045Figure 18. Settling Time Rising Edge
OUTPUT VOLTAGE STEP (V p-p)
SLEW RATE (
0.51.01.52.02.5Figure 19. Slew Rate vs. Output Voltage
FREQUENCY (MHz)
CROSSTALK (10100
–100Figure 20. Large Signal Crosstalk
