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ADA4851-2
Service Manual
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ANALOG DEVICES ADA4851-2 Service Manual

Low Cost, High Speed, Rail-to-Rail,
V

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

APPLICATIONS

Automotive infotainment systems Automotive driver assistance systems Consumer video Professional video Video switchers Active filters Clock buffers
Output Op Amps
ADA4851-1/ADA4851-2/ADA4851-4

PIN CONFIGURATIONS

ADA4851-1
V
1
OUT
2
–V
S
3
+IN
TOP VIEW (Not to Scale)
Figure 1. ADA4851-1, 6-Lead SOT-23 (RJ-6)
ADA4851-2
OUT1
1
2
–IN1
+IN1
3
4
–V
S
(Not to Scale)
Figure 2. ADA4851-2, 8-Lead MSOP (RM-8)
1
V
1
OUT
2
–IN 1
3
+IN 1
+V
+IN 2
–IN 2
OUT
S
2
ADA4851-4
4
(Not to Scale)
5
6
7
TOP VIEW
Figure 3. ADA4851-4, 14-Lead TSSOP (RU-14)
TOP VIEW
6
+V
S
5
POWER DOWN
4
–IN
8
+V
7
OUT
–IN2
6
+IN2
5
14
V
13
–IN 4
12
+IN 4
11
–V
+IN 3
10
9
–IN 3
8
V
S
OUT
OUT
S
05143-058
4
3
05143-001
05143-054

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 single­supply 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 Anal og Devices for its use, nor for any infringements of patents or ot her 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
G = +1
= 5V
V
3
S
= 1kΩ
R
L
= 5pF
C
2
L
1
0
–1
–2
–3
CLOSED-LOOP GAIN (dB)
–4
–5
–6
1 10010 1k
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.
05143-004
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

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
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
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

TA = 25°C, RF = 0 Ω for G = +1, RF = 1 kΩ for G > +1, RL = 1 kΩ, unless otherwise noted.
Table 1.
Parameter Conditions/Comments Min Typ Max Unit
DYNAMIC PERFORMANCE
−3 dB Bandwidth G = +1, V ADA4851-1W/2W/4W only: T G = +1, V
ADA4851-1W/2W/4W only: T G = +2, V Bandwidth for 0.1 dB Flatness G = +2, V Slew Rate G = +2, V Settling Time to 0.1% G = +2, V
NOISE/DISTORTION PERFORMANCE
Harmonic Distortion, HD2/HD3 fC = 1 MHz, V Input Voltage Noise f = 100 kHz 10 nV/√Hz Input Current Noise f = 100 kHz 2.5 pA/√Hz Differential Gain G = +3, NTSC, RL = 150 Ω, V Differential Phase G = +3, NTSC, RL = 150 Ω, V Crosstalk (RTI)—ADA4851-2/ADA4851-4 f = 5 MHz, G = +2, V
DC PERFORMANCE
Input Offset Voltage 0.6 3.3 mV ADA4851-1W/2W/4W only: T Input Offset Voltage Drift 4 μV/°C Input Bias Current
2.3 4.0 μA ADA4851-1W/2W/4W only: T Input Bias Current Drift 6 nA/°C Input Bias Offset Current 20 nA Open-Loop Gain V
OUT
ADA4851-1W/2W/4W only: T ADA4851-1W only: T INPUT CHARACTERISTICS
Input Resistance Differential/common-mode 0.5/5.0 MΩ Input Capacitance 1.2 pF Input Common-Mode Voltage Range −0.2 to +0.8 V Input Overdrive Recovery Time (Rise/Fall) VIN = +3.5 V, −0.5 V, G = +1 60/60 ns Common-Mode Rejection Ratio VCM = 0 V to 0.5 V −81 −103 dB
ADA4851-1W/2W/4W only: T POWER-DOWN—ADA4851-1 ONLY
Power-Down Input Voltage Power-down <1.1 V
Power-up >1.6 V
Turn-Off Time 0.7 μs Turn-On Time 60 ns Power-Down Bias Current
Enabled
POWER DOWN ADA4851-1W only: T Power-Down
POWER DOWN ADA4851-1W only: T
= 0.1 V p-p
OUT
= 0.5 V p-p 80 105 MHz
OUT
= 1 V p-p, RL = 150 Ω 40 MHz
OUT
= 1 V p-p, RL = 150 Ω 15 MHz
OUT
= 1 V step 100 V/μs
OUT
= 1 V step, RL = 150 Ω 50 ns
OUT
OUT
to T
MIN
to T
MIN
= 1 V p-p, G = −1 −73/−79 dBc
= 2 V p-p 0.44 %
OUT
= 2 V p-p 0.41 Degrees
OUT
= 1.0 V p-p −70/−60 dB
OUT
to T
MIN
to T
MIN
104 130 MHz
95 MHz
MAX
72 MHz
MAX
7.3 mV
MAX
5.0 μA
MAX
= 0.25 V to 0.75 V 80 105 dB
= 3 V
= 0 V
MIN
MIN
MIN
to T
MIN
to T
75
MAX
to T
MIN
to T
10 μA
MAX
to T
−20 μA
MAX
78 dB
MAX
−65 dB
MAX
4 10 μA
−14 −20 μA
Rev. J | Page 4 of 24
ADA4851-1/ADA4851-2/ADA4851-4
Parameter Conditions/Comments Min Typ Max Unit
OUTPUT CHARACTERISTICS
Output Overdrive Recovery Time (Rise/Fall) VIN = +0.7 V, −0.1 V, G = +5 70/100 ns Output Voltage Swing 0.05 to 2.91 0.03 to 2.94 V ADA4851-1W/2W/4W only: T Short-Circuit Current Sinking/sourcing 90/70 mA
POWER SUPPLY
Operating Range 2.7 12 V Quiescent Current per Amplifier 2.4 2.7 mA ADA4851-1W/2W/4W only: T Quiescent Current (Power-Down)
POWER DOWN
ADA4851-1W only: T
= low
MIN
to T Positive Power Supply Rejection +VS = +2.5 V to +3.5 V, −VS = −0.5 V −81 −100 dB ADA4851-1W/2W/4W only: T Negative Power Supply Rejection +VS = +2.5 V, −VS = −0.5 V to –1.5 V −80 −100 dB ADA4851-1W/2W/4W only: T
to T
MIN
MIN
0.06 to 2.89 V
MAX
to T
2.7 mA
MAX
0.2 0.3 mA
0.3 mA
MAX
to T
MIN
MIN
−81 dB
MAX
to T
−80 dB
MAX
Rev. J | Page 5 of 24
ADA4851-1/ADA4851-2/ADA4851-4

SPECIFICATIONS WITH +5 V SUPPLY

TA = 25°C, RF = 0 Ω for G = +1, RF = 1 kΩ for G > +1, RL = 1 kΩ, unless otherwise noted.
Table 2.
Parameter Conditions Min Typ Max Unit
DYNAMIC PERFORMANCE
−3 dB Bandwidth G = +1, V ADA4851-1W/2W/4W only: T G = +1, V
ADA4851-1W/2W/4W only: T G = +2, V Bandwidth for 0.1 dB Flatness G = +2, V Slew Rate G = +2, V Settling Time to 0.1% G = +2, V
NOISE/DISTORTION PERFORMANCE
Harmonic Distortion, HD2/HD3 fC = 1 MHz, V Input Voltage Noise f = 100 kHz 10 nV/√Hz Input Current Noise f = 100 kHz 2.5 pA/√Hz Differential Gain G = +2, NTSC, RL = 150 Ω, V Differential Phase G = +2, NTSC, RL = 150 Ω, V Crosstalk (RTI)—ADA4851-2/ADA4851-4 f = 5 MHz, G = +2, V
DC PERFORMANCE
Input Offset Voltage 0.6 3.4 mV ADA4851-1W/2W/4W only: T Input Offset Voltage Drift 4 μV/°C Input Bias Current
2.2 3.9 μA ADA4851-1W/2W/4W only: T Input Bias Current Drift 6 nA/°C Input Bias Offset Current 20 nA Open-Loop Gain V
OUT
ADA4851-1W/2W/4W only: T INPUT CHARACTERISTICS
Input Resistance Differential/common-mode 0.5/5.0 MΩ Input Capacitance 1.2 pF Input Common-Mode Voltage Range −0.2 to +2.8 V Input Overdrive Recovery Time (Rise/Fall) VIN = +5.5 V, −0.5 V, G = +1 50/45 ns Common-Mode Rejection Ratio VCM = 0 V to 2 V −86 −105 dB
ADA4851-1W/2W/4W only: T POWER-DOWN—ADA4851-1 ONLY
Power-Down Input Voltage Power-down <1.1 V
Power-up >1.6 V
Turn-Off Time 0.7 μs Turn-On Time 50 ns Power-Down Bias Current
Enabled
POWER DOWN ADA4851-1W only: T Power-Down
POWER DOWN ADA4851-1W only: T
= 0.1 V p-p 96 125 MHz
OUT
to T
MIN
= 0.5 V p-p 72 96 MHz
OUT
MIN
= 1.4 V p-p, RL = 150 Ω 35 MHz
OUT
= 1.4 V p-p, RL = 150 Ω 11 MHz
OUT
= 2 V step 200 V/μs
OUT
= 2 V step, RL = 150 Ω 55 ns
OUT
= 2 V p-p, G = +1 −80/−100 dBc
OUT
= 2 V p-p 0.08 %
OUT
= 2 V p-p 0.11 Degrees
OUT
= 2.0 V p-p −70/−60 dB
OUT
MIN
MIN
90 MHz
MAX
to T
64 MHz
MAX
to T
7.4 mV
MAX
to T
4.9 μA
MAX
= 1 V to 4 V 97 107 dB
to T
90 dB
MAX
to T
−80 dB
MAX
33 40 μA
−22 −30 μA
= 5 V
= 0 V
MIN
MIN
MIN
MIN
to T
40 μA
MAX
to T
−30 μA
MAX
Rev. J | Page 6 of 24
ADA4851-1/ADA4851-2/ADA4851-4
Parameter Conditions Min Typ Max Unit
OUTPUT CHARACTERISTICS
Output Overdrive Recovery Time (Rise/Fall) VIN = +1.1 V, −0.1 V, G = +5 60/70 ns Output Voltage Swing 0.09 to 4.91 0.06 to 4.94 V ADA4851-1W/2W/4W only: T Linear Output Current 1% THD with 1 MHz, V
OUT
Short-Circuit Current Sinking/sourcing 110/90 mA
POWER SUPPLY
Operating Range 2.7 12 V Quiescent Current per Amplifier 2.5 2.8 mA ADA4851-1W/2W/4W only: T Quiescent Current (Power-Down)
POWER DOWN
ADA4851-1W only: T
= low
MIN
to T Positive Power Supply Rejection +VS = +5 V to +6 V, −VS = 0 V −82 −101 dB ADA4851-1W/2W/4W only: T Negative Power Supply Rejection +VS = +5 V, −VS = −0 V to −1 V −81 −101 dB ADA4851-1W/2W/4W only: T
to T
MIN
0.11 to 4.89 V
MAX
= 2 V p-p 66 mA
to T
MIN
2.8 mA
MAX
0.2 0.3 mA
0.3 mA
MAX
to T
MIN
MIN
−82 dB
MAX
to T
−81 dB
MAX
Rev. J | Page 7 of 24
ADA4851-1/ADA4851-2/ADA4851-4

SPECIFICATIONS WITH ±5 V SUPPLY

TA = 25°C, RF = 0 Ω for G = +1, RF = 1 kΩ for G > +1, RL = 1 kΩ, unless otherwise noted.
Table 3.
Parameter Conditions Min Typ Max Unit
DYNAMIC PERFORMANCE
−3 dB Bandwidth G = +1, V ADA4851-1W/2W/4W only: T G = +1, V
ADA4851-1W/2W/4W only: T G = +2, V Bandwidth for 0.1 dB Flatness G = +2, V Slew Rate G = +2, V G = +2, V Settling Time to 0.1% G = +2, V
NOISE/DISTORTION PERFORMANCE
Harmonic Distortion, HD2/HD3 fC = 1 MHz, V Input Voltage Noise f = 100 kHz 10 nV/√Hz Input Current Noise f = 100 kHz 2.5 pA/√Hz Differential Gain G = +2, NTSC, RL = 150 Ω, V Differential Phase G = +2, NTSC, RL = 150 Ω, V Crosstalk (RTI)—ADA4851-2/ADA4851-4 f = 5 MHz, G = +2, V
DC PERFORMANCE
Input Offset Voltage 0.6 3.5 mV ADA4851-1W/2W/4W only: T Input Offset Voltage Drift 4 μV/°C Input Bias Current
2.2 4.0 μA ADA4851-1W/2W/4W only: T Input Bias Current Drift 6 nA/°C Input Bias Offset Current 20 nA Open-Loop Gain V
OUT
ADA4851-1W/2W/4W only: T INPUT CHARACTERISTICS
Input Resistance Differential/common-mode 0.5/5.0 MΩ Input Capacitance 1.2 pF Input Common-Mode Voltage Range −5.2 to +2.8 V Input Overdrive Recovery Time (Rise/Fall) VIN = ±6 V, G = +1 50/25 ns Common-Mode Rejection Ratio VCM = 0 V to −4 V −90 −105 dB
ADA4851-1W/2W/4W only: T POWER-DOWN—ADA4851-1 ONLY
Power-Down Input Voltage Power-down < −3.9 V Power-up > −3.4 V Turn-Off Time 0.7 μs Turn-On Time 30 ns Power-Down Bias Current
Enabled
POWER DOWN ADA4851-1W only: T Power-Down
POWER DOWN ADA4851-1W only: T
= 0.1 V p-p 83 105 MHz
OUT
to T
MIN
= 1 V p-p 52 74 MHz
OUT
MIN
= 2 V p-p, RL = 150 Ω 40 MHz
OUT
= 2 V p-p, RL = 150 Ω 11 MHz
OUT
= 7 V step 375 V/μs
OUT
= 2 V step 190 V/μs
OUT
= 2 V step, RL = 150 Ω 55 ns
OUT
= 2 V p-p, G = +1 −83/−107 dBc
OUT
= 2 V p-p 0.08 %
OUT
= 2 V p-p 0.09 Degrees
OUT
= 2.0 V p-p −70/−60 dB
OUT
MIN
MIN
75 MHz
MAX
to T
42 MHz
MAX
to T
7.5 mV
MAX
to T
4.5 μA
MAX
= ±2.5 V 99 106 dB
to T
90 dB
MAX
to T
−86 dB
MAX
100 130 μA
−50 −60 μA
= +5 V
= −5 V
MIN
MIN
MIN
MIN
to T
130 μA
MAX
to T
−60 μA
MAX
Rev. J | Page 8 of 24
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