Data Sheet
FEATURES
High speed
120 MHz bandwidth, gain = −1
230 V/µs slew rate
90 ns settling time to 0.1%
Ideal for video applications
0.02% differential gain
0.04° differential phase
Low noise
1.7 nV/√Hz input voltage noise
1.5 pA/√Hz input current noise
Excellent dc precision
1 mV maximum input offset voltage (over temperature)
0.3 µV/°C input offset drift
Flexible operation
Specified for ±5 V to ±15 V operation
±3 V output swing into a 150 Ω load
External compensation for gains 1 to 20
5 mA supply current
Available in tape and reel in accordance with EIA-481A standard
High Speed, Low Noise
Video Op Amp
AD829
CONNECTION DIAGRAM
OFFSET NULL
1
–IN
2
+IN
3
–V
S 4
TOP VIEW
(Not to Scale)
AD829
8
7
6
5
OFFSET NULL
+V
S
OUTPUT
00880-001
00880-002
C
COMP
Figure 1. 8-Lead PDIP (N), CERDIP (Q), and SOIC (R)
NC
OFFSET
NULL
NC
OFFSET
NULL
NC
3
2
1
20 19
NC
4
–IN
5
NC
6
+IN
7
NC
8
9
10 11 12 13
18
NC
AD829
TOP VIEW
(Not to Scale)
17
+V
16
NC
15
OUTPUT
14
NC
–V
NC
C
COMP
NC = NO CONNECT
Figure 2. 20-Terminal LCC
GENERAL DESCRIPTION
The
is a low noise (1.7 nV/√Hz), high speed op amp with
custom compensation that provides the user with gains of 1 to 20
while maintaining a bandwidth >50 MHz. Its 0.04° differential
phase and 0.02% differential gain performance at 3.58 MHz and
4.43 MHz, driving reverse-terminated 50 Ω or 75 Ω cables, makes
it ideally suited for professional video applications. The AD829
achieves its 230 V/µs uncompensated slew rate and 750 MHz
gain bandwidth while requiring only 5 mA of current from
power supplies.
The external compensation pin of the AD829 gives it
exceptional versatility. For example, compensation can be
selected to optimize the bandwidth for a given load and power
supply voltage. As a gain-of-2 line driver, the −3 dB bandwidth
can be increased to 95 MHz at the expense of 1 dB of peaking.
Its output can also be clamped at its external compensation pin.
The AD829 exhibits excellent dc performance. It offers a minimum
open-loop gain of 30 V/mV into loads as low as 500 Ω, a low input
voltage noise of 1.7 nV/√Hz, and a low input offset voltage of 1 mV
maximum. Common-mode rejection and power supply rejection
ratios are both 120 dB.
This op amp is also useful in multichannel, high speed data
conversion where its fast (90 ns to 0.1%) settling time is important.
In such applications, the AD829 serves as an input buffer for 8-bit to
10-bit ADCs and as an output I/V converter for high speed DACs.
Rev. I
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.
Operating as a traditional voltage feedback amplifier, the AD829
provides many of the advantages that a transimpedance amplifier
offer. A bandwidth >50 MHz can be maintained for a range of
gains through the replacement of the external compensation
capacitor. The AD829 and the transimpedance amplifier are both
unity-gain stable and provide similar voltage noise performance
(1.7 nV/√Hz); however, the current noise of the AD829
(1.5 pA/√Hz) is less than 10% of the noise of transimpedance
amplifiers. The inputs of the AD829 are symmetrical.
PRODUCT HIGHLIGHTS
1.
The input voltage noise of 2 nV/√Hz, current noise of
1.5 pA/√Hz, and 50 MHz bandwidth for gains of 1 to 20
make the AD829 an ideal preamp.
A differential phase error of 0.04 and a 0.02% differential
gain error, at the 3.58 MHz NTSC, 4.43 MHz PAL, and
SECAM color subcarrier frequencies, make the op amp an
outstanding video performer for driving reverse-terminated
50 Ω and 75 Ω cables to ±1 V (at their terminated end).
The AD829 can drive heavy capacitive loads.
Performance is fully specified for operation from ±5 V
to ±15 V supplies.
The AD829 is available in PDIP, CERDIP, and small outline
packages. Chips and MIL-STD-883B parts are also available.
The 8-lead SOIC is available for the extended temperature
range (−40°C to +125°C).
2.
3.
4.
5.
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
©2011 Analog Devices, Inc. All rights reserved.
NC
NC
AD829* PRODUCT PAGE QUICK LINKS
Last Content Update: 02/23/2017
COMPARABLE PARTS
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REFERENCE MATERIALS
Product Selection Guide
•
High Speed Amplifiers Selection Table
Tutorials
•
MT-032: Ideal Voltage Feedback (VFB) Op Amp
•
MT-033: Voltage Feedback Op Amp Gain and Bandwidth
•
MT-047: Op Amp Noise
•
MT-048: Op Amp Noise Relationships: 1/f Noise, RMS
Noise, and Equivalent Noise Bandwidth
•
MT-049: Op Amp Total Output Noise Calculations for
Single-Pole System
•
MT-052: Op Amp Noise Figure: Don't Be Misled
•
MT-053: Op Amp Distortion: HD, THD, THD + N, IMD,
SFDR, MTPR
•
MT-056: High Speed Voltage Feedback Op Amps
•
MT-058: Effects of Feedback Capacitance on VFB and CFB
Op Amps
•
MT-060: Choosing Between Voltage Feedback and
Current Feedback Op Amps
EVALUATION KITS
•
Universal Evaluation Board for Single High Speed
Operational Amplifiers
DOCUMENTATION
Application Notes
•
AN-402: Replacing Output Clamping Op Amps with Input
Clamping Amps
•
AN-417: Fast Rail-to-Rail Operational Amplifiers Ease
Design Constraints in Low Voltage High Speed Systems
•
AN-581: Biasing and Decoupling Op Amps in Single
Supply Applications
Data Sheet
•
AD829: High Speed, Low Noise Video Op Amp Data Sheet
•
AD829: Military Data Sheet
User Guides
•
UG-135: Evaluation Board for Single, High Speed
Operational Amplifiers (8-Lead SOIC and Exposed Paddle)
DESIGN RESOURCES
•
AD829 Material Declaration
•
PCN-PDN Information
•
Quality And Reliability
•
Symbols and Footprints
TOOLS AND SIMULATIONS
•
Analog Filter Wizard
•
Analog Photodiode Wizard
•
Power Dissipation vs Die Temp
•
VRMS/dBm/dBu/dBV calculators
•
AD829 SPICE Macro-Model
DISCUSSIONS
View all AD829 EngineerZone Discussions.
SAMPLE AND BUY
Visit the product page to see pricing options.
TECHNICAL SUPPORT
Submit a technical question or find your regional support
number.
DOCUMENT FEEDBACK
Submit feedback for this data sheet.
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AD829
TABLE OF CONTENTS
Features .............................................................................................. 1
General Description ......................................................................... 1
Connection Diagram ....................................................................... 1
Product Highlights ........................................................................... 1
Revision History ............................................................................... 2
Specifications..................................................................................... 3
Absolute Maximum Ratings............................................................ 5
Thermal Characteristics .............................................................. 5
Metallization Photo ...................................................................... 5
ESD Caution .................................................................................. 5
Typical Performance Characteristics ............................................. 6
Data Sheet
Test Circuits ..................................................................................... 11
Theory of Operation ...................................................................... 12
Externally Compensating the AD829...................................... 12
Shunt Compensation ................................................................. 12
Current Feedback Compensation ............................................ 13
Low Error Video Line Driver ................................................... 15
High Gain Video Bandwidth, 3-Op-Amp Instrumentation
Amplifier ..................................................................................... 16
Outline Dimensions ....................................................................... 17
Ordering Guide .......................................................................... 19
REVISION HISTORY
10/11—Rev. H to Rev. I
Change to Table 2 ............................................................................. 5
4/09—Rev. G to Rev. H
Changes to Features.......................................................................... 1
Changes to Quiescent Current Parameter, Table 1 ...................... 4
Changes to Table 2 ............................................................................ 5
Added Thermal Characteristics Section and Table 3 .................. 5
Updated Outline Dimensions ....................................................... 17
Changes to Ordering Guide .......................................................... 19
4/04—Rev. F to Rev. G
Added Figure 1; Renumbered Sequentially .................................. 4
Changes to Ordering Guide ............................................................ 5
Updated Table I ............................................................................... 11
Updated Figure 15 .......................................................................... 12
Updated Figure 16 .......................................................................... 13
Updated Outline Dimensions ....................................................... 14
2/03—Rev. E to Rev. F
Renumbered Figures ......................................................... Universal
Changes to Product Highlights .......................................................1
Changes to Specifications .................................................................2
Changes to Absolute Maximum Ratings ........................................4
Changes to Ordering Guide .............................................................4
Updated Outline Dimensions ....................................................... 13
Rev. I | Page 2 of 20
Data Sheet
SPECIFICATIONS
T
A
= 25°C and V
S
= ±15 V dc, unless otherwise noted.
Table 1.
Parameter
INPUT OFFSET VOLTAGE
Conditions
t
MIN
to t
MAX
V
S
±5 V,
±15 V
±5 V,
±15 V
±5 V,
±15 V
t
MIN
to t
MAX
INPUT OFFSET CURRENT
t
MIN
to t
MAX
Offset Current Drift
OPEN-LOOP GAIN
V
O
= ±2.5 V,
R
L
= 500 Ω
R
L
= 150 Ω
t
MIN
to t
MAX
V
O
= ±10 V,
R
L
= 1 kΩ
R
L
= 500 Ω
t
MIN
to t
MAX
± 5 V,
±15 V
±5 V
0.5
30
65
40
±15 V
20
50
100
85
20
±5 V
±15 V
±5 V
±15 V
±5 V
±15 V
±5 V
±15 V
±15 V
±15 V
±15 V
±5 V
±15 V
100
100
96
98
94
±15 V
±15 V
1.7
1.5
2
600
750
25
3.6
150
230
65
90
60
0.02
0.04
120
120
120
100
100
96
98
94
1.7
1.5
2
20
600
750
25
3.6
150
230
65
90
60
0.02
0.04
120
120
120
100
100
96
98
94
1.7
1.5
2
20
50
30
±5 V,
±15 V
50
AD829JR
Min Typ
Max
0.2
1
1
Offset Voltage Drift
INPUT BIAS CURRENT
0.3
3.3
7
8.2
500
500
0.5
65
40
100
85
20
600
750
25
3.6
150
230
65
90
60
0.02
0.04
120
120
120
20
50
30
0.3
3.3
7
9.5
500
500
0.5
65
40
100
85
AD829AR
Min Typ
Max
0.2
1
1
0.3
3.3
7
9.5
500
500
AD829AQ/AD829S
Min Typ
Max
0.1
0.5
0.5
AD829
Unit
mV
mV
µV/°C
µA
µA
nA
nA
nA/°C
V/mV
V/mV
V/mV
V/mV
V/mV
V/mV
MHz
MHz
MHz
MHz
V/µs
V/µs
ns
ns
Degrees
%
Degrees
dB
dB
dB
dB
dB
nV/√Hz
pA/√Hz
50
50
DYNAMIC PERFORMANCE
Gain Bandwidth Product
Full Power Bandwidth
1, 2
V
O
= 2 V p-p,
R
L
= 500 Ω
V
O
= 20 V p-p,
R
L
= 1 kΩ
R
L
= 500 Ω
R
L
= 1 kΩ
A
V
= –19
−2.5 V to
+2.5 V
10 V step
C
L
= 10 pF
R
L
= 1 kΩ
R
L
= 100 Ω,
C
COMP
= 30 pF
R
L
= 100 Ω,
C
COMP
= 30 pF
V
CM
= ±2.5 V
V
CM
= ±12 V
t
MIN
to t
MAX
V
S
= ±4.5 V
to ±18 V
t
MIN
to t
MAX
f = 1 kHz
f = 1 kHz
Slew Rate
2
Settling Time to 0.1%
Phase Margin
2
DIFFERENTIAL GAIN ERROR
3
DIFFERENTIAL PHASE ERROR
3
COMMON-MODE REJECTION
POWER SUPPLY REJECTION
INPUT VOLTAGE NOISE
INPUT CURRENT NOISE
Rev. I | Page 3 of 20
AD829
Parameter
INPUT COMMON-MODE
VOLTAGE RANGE
Conditions
V
S
±5 V
AD829JR
Min Typ
Max
+4.3
−3.8
+14.3
−13.8
±3.6
±3.0
±1.4
±13.3
±12.2
32
AD829AR
Min Typ
Max
+4.3
−3.8
+14.3
−13.8
±3.6
±3.0
±1.4
±13.3
±12.2
32
Data Sheet
AD829AQ/AD829S
Min Typ
Max
+4.3
−3.8
+14.3
−13.8
±3.6
±3.0
±1.4
±13.3
±12.2
32
Unit
V
V
V
V
V
V
V
V
V
mA
±15 V
OUTPUT VOLTAGE SWING
R
L
= 500 Ω
R
L
= 150 Ω
R
L
= 50 Ω
R
L
= 1 kΩ
R
L
= 500 Ω
±5 V
±5 V
±5 V
±15 V
±15 V
±5 V,
±15 V
±3.0
±2.5
±12
±10
±3.0
±2.5
±12
±10
±3.0
±2.5
±12
±10
Short-Circuit Current
INPUT CHARACTERISTICS
Input Resistance
(Differential)
Input Capacitance
(Differential)
4
Input Capacitance
(Common Mode)
CLOSED-LOOP OUTPUT
RESISTANCE
POWER SUPPLY
Operating Range
Quiescent Current
13
5
1.5
A
V
= +1,
f = 1 kHz
±4.5
±5 V
t
MIN
to t
MAX
±15 V
5.3
46
t
MIN
to t
MAX
Number of
transistors
5
2
13
5
1.5
2
13
5
1.5
2
kΩ
pF
pF
mΩ
±18
6.5
8.0
6.8
8.3
±4.5
5
5.3
46
±18
6.5
8.0
6.8
9.0
±4.5
5
5.3
46
±18
6.5
8.7
6.8
9.0
V
mA
mA
mA
mA
TRANSISTOR COUNT
1
2
Full power bandwidth = slew rate/2
π
V
PEAK
.
Tested at gain = 20, C
COMP
= 0 pF.
3
3.58 MHz (NTSC) and 4.43 MHz (PAL and SECAM).
4
Differential input capacitance consists of 1.5 pF package capacitance plus 3.5 pF from the input differential pair.
Rev. I | Page 4 of 20
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