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Low Cost, High Speed, Rail-to-Rail,
Output Op Amps
ADA4851-1/ADA4851-2/ADA4851-4
FEATURES
Qualified for automotive applications
High speed
130 MHz, −3 dB bandwidth
375 V/μs slew rate
55 ns settling time to 0.1%
Excellent video specifications
0.1 dB flatness: 11 MHz
Differential gain: 0.08%
Differential phase: 0.09°
Fully specified at +3 V, +5 V, and ±5 V supplies
Rail-to-rail output
Output swings to within 60 mV of either rail
Low voltage offset: 0.6 mV
Wide supply range: 2.7 V to 12 V
Low power: 2.5 mA per amplifier
Power-down mode
Available in space-saving packages
6-lead SOT-23, 8-lead MSOP, and 14-lead TSSOP
PIN CONFIGURATIONS
V
OUT 1
–V
S 2
+IN
3
ADA4851-1
6
5
4
+V
S
POWER DOWN
05143-001
–IN
TOP VIEW (Not to Scale)
Figure 1. ADA4851-1, 6-Lead SOT-23 (RJ-6)
ADA4851-2
OUT1
1
–IN1
2
+IN1
3
–V
S 4
TOP VIEW
(Not to Scale)
8
7
6
5
+V
S
OUT
–IN2
+IN2
05143-058
Figure 2. ADA4851-2, 8-Lead MSOP (RM-8)
V
OUT
1
1
–IN 1
2
+IN 1
3
+V
S 4
+IN 2
5
–IN 2
6
V
OUT
2
7
14
13
12
11
10
9
8
V
OUT
4
–IN 4
+IN 4
–V
S
+IN 3
–IN 3
V
OUT
3
05143-054
APPLICATIONS
Automotive infotainment systems
Automotive driver assistance systems
Consumer video
Professional video
Video switchers
Active filters
Clock buffers
TOP VIEW
(Not to Scale)
ADA4851-4
Figure 3. ADA4851-4, 14-Lead TSSOP (RU-14)
GENERAL DESCRIPTION
The ADA4851-1 (single), ADA4851-2 (dual), and ADA4851-4
(quad) are low cost, high speed, voltage feedback rail-to-rail
output op amps. Despite their low price, these parts provide
excellent overall performance and versatility. The 130 MHz,
−3 dB bandwidth and high slew rate make these amplifiers well
suited for many general-purpose, high speed applications.
The ADA4851 family is designed to operate at supply voltages
as low as +3 V and up to ±5 V. These parts provide true single-
supply capability, allowing input signals to extend 200 mV
below the negative rail and to within 2.2 V of the positive rail.
On the output, the amplifiers can swing within 60 mV of either
supply rail.
With their combination of low price, excellent differential gain
(0.08%), differential phase (0.09º), and 0.1 dB flatness out to
11 MHz, these amplifiers are ideal for consumer video applications.
The ADA4851-1W, ADA4851-2W, and ADA4851-4W are
automotive grade versions, qualified for automotive applications.
Rev. J
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.
See the Automotive Products section for more details. The
ADA4851 family is designed to work over the extended
temperature range (−40°C to +125°C).
4
3
2
CLOSED-LOOP GAIN (dB)
G = +1
V
S
= 5V
R
L
= 1kΩ
C
L
= 5pF
1
0
–1
–2
–3
–4
–5
1
10
100
1k
05143-004
–6
FREQUENCY (MHz)
Figure 4. Small-Signal Frequency Response
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 ©2004–2010 Analog Devices, Inc. All rights reserved.
ADA4851-1/ADA4851-2/ADA4851-4
TABLE OF CONTENTS
Features .............................................................................................. 1
Applications ....................................................................................... 1
Pin Configurations ........................................................................... 1
General Description ......................................................................... 1
Revision History ............................................................................... 2
Specifications..................................................................................... 4
Specifications with +3 V Supply ................................................. 4
Specifications with +5 V Supply ................................................. 6
Specifications with ±5 V Supply ................................................. 8
Absolute Maximum Ratings.......................................................... 10
Thermal Resistance .................................................................... 10
ESD Caution................................................................................ 10
Typical Performance Characteristics ........................................... 11
Circuit Description......................................................................... 17
Headroom Considerations ........................................................ 17
Overload Behavior and Recovery ............................................ 18
Single-Supply Video Amplifier ................................................. 19
Video Reconstruction Filter ...................................................... 19
Outline Dimensions ....................................................................... 20
Ordering Guide .......................................................................... 21
Automotive Products ................................................................. 21
REVISION HISTORY
10/10—Rev. I to Rev. J
Added Output Characteristics, Linear Output Current
Parameter, Table 2............................................................................. 7
Added Output Characteristics, Linear Output Current
Parameter, Table 3............................................................................. 9
5/10—Rev. H to Rev. I
Changes to Power-Down Bias Current Parameter, Table 1 ........ 3
Moved Automotive Products Section .......................................... 20
4/10—Rev. G. to Rev. H
Added Automotive Product Information ................... Throughout
Changes to Table 1 Through Table 3 .............................................. 3
Updated Outline Dimensions ....................................................... 19
Changes to Ordering Guide .......................................................... 20
9/09—Rev. F. to Rev. G
Moved Automotive Products Section .......................................... 18
Updated Outline Dimensions ....................................................... 19
5/09—Rev. E. to Rev. F
Changes to Features, Applications, and General Description
Sections .............................................................................................. 1
Changes to Table 1 ............................................................................ 3
Changes to Table 2 ............................................................................ 5
Changes to Table 3 ............................................................................ 7
Changes to Figure 27 and Figure 28 ............................................. 13
Changes to Figure 47, Added Automotive Products Section ... 18
Updated Outline Dimensions ....................................................... 19
Changes to Ordering Guide .......................................................... 20
8/07—Rev. D to Rev. E
Changes to Applications ...................................................................1
Changes to Common-Mode Rejection Ratio, Conditions...........5
Changes to Headroom Considerations Section ......................... 13
4/06—Rev. C to Rev. D
Added Video Reconstruction Filter Section ............................... 15
5/05—Rev. B to Rev. C
Changes to General Description .....................................................1
Changes to Input Section .............................................................. 14
4/05—Rev. A to Rev. B
Added ADA4851-2, Added 8-Lead MSOP ..................... Universal
Changes to Features ..........................................................................1
Changes to General Description .....................................................1
Changes to Table 1.............................................................................3
Changes to Table 2.............................................................................4
Changes to Table 3.............................................................................5
Changes to Table 4 and Figure 5 ......................................................6
Changes to Figure 12, Figure 15, and Figure 17 ............................8
Changes to Figure 18.........................................................................9
Changes to Figure 28 Caption ...................................................... 10
Changes to Figure 33...................................................................... 11
Changes to Figure 36 and Figure 38, Added Figure 39 ............. 12
Changes to Circuit Description Section ...................................... 13
Changes to Headroom Considerations Section ......................... 13
Changes to Overload Behavior and Recovery Section .............. 14
Added Single-Supply Video Amplifier Section .......................... 15
Updated Outline Dimensions ....................................................... 16
Changes to Ordering Guide .......................................................... 17
Rev. J | Page 2 of 24
ADA4851-1/ADA4851-2/ADA4851-4
1/05—Rev. 0 to Rev. A
Added ADA4851-4 ............................................................ Universal
Added 14-Lead TSSOP...................................................... Universal
Changes to Features ..........................................................................1
Changes to General Description .....................................................1
Changes to Figure 3...........................................................................1
Changes to Specifications.................................................................3
Changes to Figure 4...........................................................................6
Changes to Figure 8...........................................................................7
Changes to Figure 11 ........................................................................8
Changes to Figure 22 ........................................................................9
Changes to Figure 23, Figure 24, and Figure 25..........................10
Changes to Figure 27 and Figure 28 .............................................10
Changes to Figure 29, Figure 30, and Figure 31..........................11
Changes to Figure 34 ......................................................................11
Added Figure 37 ..............................................................................12
Changes to Ordering Guide...........................................................15
Updated Outline Dimensions........................................................15
10/04—Revision 0: Initial Version
Rev. J | Page 3 of 24
ADA4851-1/ADA4851-2/ADA4851-4
SPECIFICATIONS
SPECIFICATIONS WITH +3 V SUPPLY
T
A
= 25°C, R
F
= 0 Ω for G = +1, R
F
= 1 kΩ for G > +1, R
L
= 1 kΩ, unless otherwise noted.
Table 1.
Parameter
DYNAMIC PERFORMANCE
−3 dB Bandwidth
Conditions/Comments
G = +1, V
OUT
= 0.1 V p-p
ADA4851-1W/2W/4W only: T
MIN
to T
MAX
G = +1, V
OUT
= 0.5 V p-p
ADA4851-1W/2W/4W only: T
MIN
to T
MAX
G = +2, V
OUT
= 1 V p-p, R
L
= 150 Ω
G = +2, V
OUT
= 1 V p-p, R
L
= 150 Ω
G = +2, V
OUT
= 1 V step
G = +2, V
OUT
= 1 V step, R
L
= 150 Ω
f
C
= 1 MHz, V
OUT
= 1 V p-p, G = −1
f = 100 kHz
f = 100 kHz
G = +3, NTSC, R
L
= 150 Ω, V
OUT
= 2 V p-p
G = +3, NTSC, R
L
= 150 Ω, V
OUT
= 2 V p-p
f = 5 MHz, G = +2, V
OUT
= 1.0 V p-p
Min
104
95
80
72
Typ
130
105
40
15
100
50
−73/−79
10
2.5
0.44
0.41
−70/−60
0.6
ADA4851-1W/2W/4W only: T
MIN
to T
MAX
Input Offset Voltage Drift
Input Bias Current
ADA4851-1W/2W/4W only: T
MIN
to T
MAX
Input Bias Current Drift
Input Bias Offset Current
Open-Loop Gain
6
20
105
4
2.3
3.3
7.3
4.0
5.0
Max
Unit
MHz
MHz
MHz
MHz
MHz
MHz
V/μs
ns
dBc
nV/√Hz
pA/√Hz
%
Degrees
dB
mV
mV
μV/°C
μA
μA
nA/°C
nA
dB
dB
Bandwidth for 0.1 dB Flatness
Slew Rate
Settling Time to 0.1%
NOISE/DISTORTION PERFORMANCE
Harmonic Distortion, HD2/HD3
Input Voltage Noise
Input Current Noise
Differential Gain
Differential Phase
Crosstalk (RTI)—ADA4851-2/ADA4851-4
DC PERFORMANCE
Input Offset Voltage
V
OUT
= 0.25 V to 0.75 V
ADA4851-1W/2W/4W only: T
MIN
to T
MAX
ADA4851-1W only: T
MIN
to T
MAX
Differential/common-mode
80
78
75
INPUT CHARACTERISTICS
Input Resistance
Input Capacitance
Input Common-Mode Voltage Range
Input Overdrive Recovery Time (Rise/Fall)
Common-Mode Rejection Ratio
POWER-DOWN—ADA4851-1 ONLY
Power-Down Input Voltage
Turn-Off Time
Turn-On Time
Power-Down Bias Current
Enabled
Power-Down
V
IN
= +3.5 V, −0.5 V, G = +1
V
CM
= 0 V to 0.5 V
ADA4851-1W/2W/4W only: T
MIN
to T
MAX
Power-down
Power-up
−81
−65
0.5/5.0
1.2
−0.2 to +0.8
60/60
−103
MΩ
pF
V
ns
dB
dB
V
V
μs
ns
10
10
−20
−20
μA
μA
μA
μA
<1.1
>1.6
0.7
60
4
−14
POWER DOWN = 3 V
ADA4851-1W only: T
MIN
to T
MAX
POWER DOWN = 0 V
ADA4851-1W only: T
MIN
to T
MAX
Rev. J | Page 4 of 24
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