Preliminary Technical Data
FEATURES
Voltage feedback architecture
High speed
400 MHz, −3 dB bandwidth, G = 1
190 MHz, −3 dB bandwidth, G = 2
800 V/μs slew rate
0.1 dB bandwidth flatness out to 63 MHz, G = 1
6 ns settling time to 1% with 2 V step
High input common-mode voltage range
V
EE
− 0.2 V to V
CC
− 1 V
Rail-to-rail output swing: 0.2 V to 4.85 V
Operates on 3.3 V to 5 V supplies
Low offset voltage: 1 mV
Excellent video specifications (R
L
= 150 Ω, G = 2)
Differential gain error: 0.01%
Differential phase error: 0.01°
Low power, 7.7mA/amplifier typical supply current
Available in 16-lead LFCSP
High Speed, Single Supply,
Rail-to-Rail Output, Triple Op Amp
ADA4855-3
CONNECTION DIAGRAM
OUT1
+IN1
–IN1
16
15 14
13
–V
S
NC
+IN2
NC
PD
1
2
3
4
12 +V
S
ADA4855-3
11 OUT2
10 –IN2
9
+V
S
5
+IN3
6
–IN3
7
OUT3
8
–V
S
NOTES
1. NC = NO CONNECT.
2. EXPOSED PAD CONNECTED TO –V
S
.
Figure 1. ADA4855-3
APPLICATIONS
Professional video
Consumer video
Imaging
Industrial
Instrumentation
Professional videos and cameras
Base stations
Filters
GENERAL DESCRIPTION
The ADA4855-3 is a single-supply, rail-to-rail output amplifier. It
provides excellent overall performance with a wide −3 dB bandwidth
out to 400 MHz and a fast slew rate of 800 V/μs. It has a wide
input common-mode voltage range that extends 0.2 V below
ground and 1 V below the positive rail. In addition, the output
voltage swings within 200 mV of either supply rail, making these op
amps easy to use on a single-supply voltage as low as 3.3 V. For video
applications, the differential gain and phase errors are 0.01% and
0.01° into a 150 Ω load, along with 0.1 dB flatness out to 63 MHz.
The ADA4855-3 offers a typical low power of 7.7 mA per amplifier,
while being capable of delivering up to 40 mA of load current. It
has a power-down feature that reduces the supply current down to
1 mA.
Figure 2.Frequency Response, G = 1
The ADA4855-3 is available in a 16-lead LFCSP and is designed to
work over the extended industrial temperature range of −40°C to
+105°C.
Rev. PrB
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other
rights of third parties that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarks and registered trademarks are the property of their respective owners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
www.analog.com
Fax: 781.461.3113
©2008 Analog Devices, Inc. All rights reserved.
07685-001
ADA4855-3
TABLE OF CONTENTS
Features .............................................................................................. 1
Applications....................................................................................... 1
General Description ......................................................................... 1
Connection Diagram ....................................................................... 1
Revision History ............................................................................... 2
Specifications..................................................................................... 3
Absolute Maximum Ratings............................................................ 5
Thermal Resistance ...................................................................... 5
Preliminary Technical Data
Maximum Power Dissipation ......................................................5
ESD Caution...................................................................................5
Pin Configuration and Function Descriptions..............................6
Outline Dimensions ..........................................................................7
Ordering Guide .............................................................................7
REVISION HISTORY
9/08—Revision PrB: Specs Version
8/08—Revision PrA: Initial Version
Rev. PrB | Page 2 of 7
Preliminary Technical Data
SPECIFICATIONS
T
A
= 25°C, V
S
= 5 V, R
L
= 150 Ω, unless otherwise noted.
Table 1.
Parameter
DYNAMIC PERFORMANCE
−3 dB Bandwidth
Conditions
G = 1, V
O
= 0.2 V p-p
G = 1, V
O
= 2 V p-p
G = 2, V
O
= 0.2 V p-p
G = 2, V
O
= 2 V p-p
G = 1, V
O
= 2 V p-p
G = 2, V
O
= 2 V p-p
G = 1, V
O
= 2 V step
G = 1, V
O
= 2 V step
G = 2, V
O
= 2 V step
f
C
= 5 MHz, V
O
= 2 V p-p
f
C
= 20 MHz, V
O
= 2 V p-p
f = 5 MHz, G = 2
f = 100 kHz
f = 100 kHz
G=2
G=2
Min
Typ
400
210
190
115
63
30
800
TBD
6
TBD
TBD
−65
6.5
TBD
0.01
0.01
1
TBD
4.5
±0.05
90
TBD
TBD
V
EE
− 0.2
V
CM
= –0.2 V to +4 V
0.2
40
100
3.75
3
7.7
1
TBD
5.5
TBD
3
ADA4855-3
Max
Unit
MHz
MHz
MHz
MHz
MHz
MHz
V/μs
ns
ns
dBc
dBc
dBc
nV/√Hz
pA/√Hz
%
Degrees
mV
μV/°C
μA
μA
dB
MΩ
pF
V
dB
V
mA
ns
V
V
mA
mA
dB
Bandwidth for 0.1 dB Flatness
Slew Rate
Settling Time to 1%
NOISE/DISTORTION PERFORMANCE
Total Harmonic Distortion
Crosstalk, Output to Output
Input Voltage Noise
Input Current Noise
Differential Gain Error
Differential Phase Error
DC PERFORMANCE
Input Offset Voltage
Input Offset Voltage Drift
Input Bias Current
Input Offset Current
Open-Loop Gain
INPUT CHARACTERISTICS
Input Resistance
Input Capacitance
Input Common-Mode Voltage Range
Common-Mode Rejection Ratio
OUTPUT CHARACTERISTICS
Output Voltage Swing
Maximum Output Current
POWER-DOWN
Turn-On Time
ENABLE Voltage, On
POWER SUPPLY
Operating Range
Quiescent Current per Amplifier
Supply Current when Disabled
Power Supply Rejection Ratio
V
O
= 0.5 V to 4.5 V
V
CC
− 1
4.85
∆V
S
= 1.3 V to 4.5 V
Rev. PrB | Page 3 of 7
ADA4855-3
T
A
= 25°C, V
S
= 3.0 V, R
L
= 150 Ω, V
O
= 2 V, unless otherwise noted.
Table 2.
Parameter
DYNAMIC PERFORMANCE
−3 dB Bandwidth
Conditions
G = 1, V
O
= 0.2 V p-p
G = 1, V
O
= 2 V p-p
G = 2, V
O
= 0.2 V p-p
G = 2, V
O
= 2 V p-p
G = 2, V
O
= 2 V p-p
G = 2, V
O
= 2 V p-p
G = 2, V
O
= 2 V step
G = 2, V
O
= 2 V step
f
C
= 5 MHz, V
O
= 2 V p-p
f
C
= 20 MHz, V
O
= 2 V p-p
f = 5 MHz, G = 2
f = 100 kHz
f = 100 kHz
G=2
G=2
Preliminary Technical Data
Min
Typ
Max
Unit
MHz
MHz
MHz
MHz
MHz
MHz
V/μs
ns
dBc
dBc
dBc
nV/√Hz
pA/√Hz
%
Degrees
mV
μV/°C
μA
μA
dB
MΩ
pF
V
dB
V
mA
ns
V
V
mA
μA
dB
Bandwidth for 0.1 dB Flatness
Slew Rate
Settling Time to 1%
NOISE/DISTORTION PERFORMANCE
Total Harmonic Distortion
Crosstalk, Output to Output
Input Voltage Noise
Input Current Noise
Differential Gain Error
Differential Phase Error
DC PERFORMANCE
Input Offset Voltage
Input Offset Voltage Drift
Input Bias Current
Input Offset Current
Open-Loop Gain
INPUT CHARACTERISTICS
Input Resistance
Input Capacitance
Input Common-Mode Voltage Range
Common-Mode Rejection Ratio
OUTPUT CHARACTERISTICS
Output Voltage Swing, Load Resistance
Output Current
POWER-DOWN DISABLE
Turn-On Time
ENABLE Voltage, On
POWER SUPPLY
Operating Range
Quiescent Current per Amplifier
Supply Current when Disabled
Power Supply Rejection Ratio
V
O
= 0.5 V to 4.5 V
V
CM
= –0.2 V to +3.2 V
V
O
= 0.5 V to 4.5 V
∆V
S
= 1.3 V to 1.5 V
Rev. PrB | Page 4 of 7
Preliminary Technical Data
ABSOLUTE MAXIMUM RATINGS
Table 3.
Parameter
Supply Voltage
Internal Power Dissipation
1
Common-Mode Input Voltage
Differential Input Voltage
Output Short-Circuit Duration
Storage Temperature Range
Operating Temperature Range
Lead Temperature (Soldering, 10 sec)
1
ADA4855-3
MAXIMUM POWER DISSIPATION
Rating
6V
See Figure 3
(−V
S
− 0.2 V) to (+V
S
− 1 V)
±V
S
Observe Power Curves
−65°C to +125°C
−40°C to +105°C
300°C
Specification is for device in free air.
MAXIMUM POWER DISSIPATION (W)
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.
The maximum power that can be safely dissipated by the
ADA4855-3 is limited by the associated rise in junction
temperature. The maximum safe junction temperature for plastic
encapsulated devices is determined by the glass transition
temperature of the plastic, approximately 150°C. Temporarily
exceeding this limit may cause a shift in parametric performance
due to a change in the stresses exerted on the die by the package.
Exceeding a junction temperature of 175°C for an extended
period can result in device failure. While the ADA4855-3 is
internally short-circuit protected, this may not be sufficient to
guarantee that the maximum junction temperature (150°C) is not
exceeded under all conditions.
To ensure proper operation, it is necessary to observe the
maximum power derating curves.
3.0
2.5
THERMAL RESISTANCE
θ
JA
is specified for the worst-case conditions, that is, θ
JA
is specified
for device soldered in circuit board for surface-mount packages.
Table 4.
Package Type
16-Lead LFCSP
θ
JA
67
θ
JC
17.5
Unit
°C/W
2.0
1.5
1.0
0.5
07685-103
0
10
20
30
40
50
60
70
80
–40
–30
–20
–10
90
100
110
AMBIENT TEMPERATURE (°C)
Figure 3. Maximum Power Dissipation vs. Ambient Temperature
ESD CAUTION
Rev. PrB | Page 5 of 7
120
0
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