a
FEATURES
Two Video Amplifiers in One 8-Lead SOIC Package
Optimized for Driving Cables in Video Systems
Excellent Video Specifications (R
L
= 150 ):
Gain Flatness 0.1 dB to 40 MHz
0.02% Differential Gain Error
0.02 Differential Phase Error
Low Power
Operates on Single +3 V Supply
5.5 mA/Amplifier Max Power Supply Current
High Speed
145 MHz Unity Gain Bandwidth (3 dB)
1600 V/ s Slew Rate
Easy to Use
50 mA Output Current
Output Swing to 1 V of Rails (150 Load)
APPLICATIONS
Video Line Driver
Professional Cameras
Video Switchers
Special Effects
PRODUCT DESCRIPTION
Dual, Current Feedback
Low Power Op Amp
AD812
PIN CONFIGURATION
8-Lead Plastic
Mini-DIP and SOIC
OUT1 1
–IN1 2
+IN1 3
+
+
8 V+
7 OUT2
6 –IN2
V–
4
AD812
5 +IN2
The AD812 is a low power, single supply, dual video amplifier.
Each of the amplifiers have 50 mA of output current and are
optimized for driving one back-terminated video load (150
Ω)
each. Each amplifier is a current feedback amplifier and fea-
tures gain flatness of 0.1 dB to 40 MHz while offering differen-
tial gain and phase error of 0.02% and 0.02°. This makes the
AD812 ideal for professional video electronics such as cameras
and video switchers.
0.4
0.3
0.2
G = +2
R
L
= 150
The AD812 offers low power of 4.0 mA per amplifier max (V
S
=
+5 V) and can run on a single +3 V power supply. The outputs
of each amplifier swing to within one volt of either supply rail to
easily accommodate video signals of 1 V p-p. Also, at gains of
+2 the AD812 can swing 3 V p-p on a single +5 V power sup-
ply. All this is offered in a small 8-lead plastic DIP or 8-lead
SOIC package. These features make this dual amplifier ideal
for portable and battery powered applications where size and
power is critical.
The outstanding bandwidth of 145 MHz along with 1600 V/µs
of slew rate make the AD812 useful in many general purpose
high speed applications where a single +5 V or dual power sup-
plies up to
±
15 V are available. The AD812 is available in the
industrial temperature range of –40°C to +85°C.
0.06
DIFFERENTIAL GAIN – %
0.04
DIFFERENTIAL GAIN
NORMALIZED GAIN – dB
0.1
0
–0.1
–0.2
V
S
=
–0.3
5V
–0.4
5V
–0.5
3V
–0.6
100k
1M
10M
FREQUENCY – Hz
100M
15V
DIFFERENTIAL PHASE – Degrees
0.08
0.02
0.06
DIFFERENTIAL PHASE
0.04
0.02
0
5
6
7
8
9
10
11
12
SUPPLY VOLTAGE – Volts
13
14
15
Figure 1. Fine-Scale Gain Flatness vs. Frequency, Gain
= +2, R
L
= 150
Ω
Figure 2. Differential Gain and Phase vs. Supply Voltage,
Gain = +2, R
L
= 150
Ω
REV. B
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
which may result from its use. No license is granted by implication or
otherwise under any patent or patent rights of Analog Devices.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700
World Wide Web Site: http://www.analog.com
Fax: 781/326-8703
© Analog Devices, Inc., 1998
AD812* PRODUCT PAGE QUICK LINKS
Last Content Update: 02/23/2017
COMPARABLE PARTS
View a parametric search of comparable parts.
REFERENCE MATERIALS
Tutorials
•
MT-034: Current Feedback (CFB) Op Amps
•
MT-051: Current Feedback Op Amp Noise Considerations
•
MT-057: High Speed Current Feedback Op Amps
•
MT-059: Compensating for the Effects of Input
Capacitance on VFB and CFB Op Amps Used in Current-to-
Voltage Converters
EVALUATION KITS
•
Universal Evaluation Board for Dual High Speed
Operational Amplifiers
DOCUMENTATION
Application Notes
•
AN-414: Low Cost, Low Power Devices for HDSL
Applications
•
AN-649: Using the Analog Devices Active Filter Design
Tool
•
AN-692: Universal Precision Op Amp Evaluation Board
•
AN-851: A WiMax Double Downconversion IF Sampling
Receiver Design
Data Sheet
•
AD812: Dual, Current Feedback Low Power Op Amp Data
Sheet
User Guides
•
UG-128: Universal Evaluation Board for Dual High Speed
Op Amps in SOIC Packages
DESIGN RESOURCES
•
AD812 Material Declaration
•
PCN-PDN Information
•
Quality And Reliability
•
Symbols and Footprints
DISCUSSIONS
View all AD812 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.
TOOLS AND SIMULATIONS
•
AD812 SPICE Macro-Model
DOCUMENT FEEDBACK
Submit feedback for this data sheet.
This page is dynamically generated by Analog Devices, Inc., and inserted into this data sheet. A dynamic change to the content on this page will not
trigger a change to either the revision number or the content of the product data sheet. This dynamic page may be frequently modified.
AD812–SPECIFICATIONS
Dual Supply
(@ T = +25 C, R = 150
A
L
, unless otherwise noted)
Conditions
V
S
±
5 V
±
15 V
±
15 V
±
5 V
±
15 V
±
5 V
±
15 V
±
5 V
±
15 V
±
5 V
±
15 V
±
15 V
±
5 V,
±
15 V
±
5 V,
±
15 V
±
5 V,
±
15 V
±
5 V
±
15 V
±
5 V
±
15 V
±
5 V,
±
15 V
T
MIN
–T
MAX
±
5 V,
±
15 V
±
5 V,
±
15 V
±
5 V,
±
15 V
±
5 V
±
15 V
±
5 V
±
15 V
68
69
76
75
350
270
450
370
Min
50
75
100
20
25
275
1400
AD812A
Typ
65
100
145
30
40
425
1600
250
600
50
40
–90
3.5
1.5
18
0.05
0.02
0.07
0.02
2
15
7
0.3
76
82
550
800
Max
Units
MHz
MHz
MHz
MHz
MHz
V/µs
V/µs
V/µs
V/µs
ns
ns
dBc
nV/√Hz
pA/√Hz
pA/√Hz
%
%
Degrees
Degrees
mV
mV
µV/°C
µA
µA
µA
µA
dB
dB
dB
dB
kΩ
kΩ
kΩ
kΩ
MΩ
Ω
pF
±
V
±
V
dB
µA/V
µA/V
dB
µA/V
µA/V
Model
DYNAMIC PERFORMANCE
–3 dB Bandwidth
G = +2, No Peaking
Gain = +1
G = +2
G = +2, R
L
= 1 kΩ
20 V Step
G = –1, R
L
= 1 kΩ
G = –1, R
L
= 1 kΩ
V
O
= 3 V Step
V
O
= 10 V Step
f
C
= 1 MHz, R
L
= 1 kΩ
f = 10 kHz
f = 10 kHz, +In
f = 10 kHz, –In
NTSC, G = +2, R
L
= 150
Ω
Bandwidth for 0.1 dB Flatness
Slew Rate
1
Settling Time to 0.1%
NOISE/HARMONIC PERFORMANCE
Total Harmonic Distortion
Input Voltage Noise
Input Current Noise
Differential Gain Error
Differential Phase Error
DC PERFORMANCE
Input Offset Voltage
Offset Drift
–Input Bias Current
0.1
0.06
0.15
0.06
5
12
25
38
1.5
2.0
T
MIN
–T
MAX
+Input Bias Current
Open-Loop Voltage Gain
T
MIN
–T
MAX
V
O
=
±
2.5 V, R
L
= 150
Ω
T
MIN
–T
MAX
V
O
=
±
10 V, R
L
= 1 kΩ
T
MIN
–T
MAX
V
O
=
±
2.5 V, R
L
= 150
Ω
T
MIN
–T
MAX
V
O
=
±
10 V, R
L
= 1 kΩ
T
MIN
–T
MAX
+Input
–Input
+Input
Open-Loop Transresistance
INPUT CHARACTERISTICS
Input Resistance
Input Capacitance
Input Common Mode
Voltage Range
Common-Mode Rejection Ratio
Input Offset Voltage
–Input Current
+Input Current
Input Offset Voltage
–Input Current
+Input Current
±
15 V
±
5 V
±
15 V
15
65
1.7
4.0
13.5
51
58
2
0.07
60
1.5
0.05
V
CM
=
±
2.5 V
V
CM
=
±
12 V
±
5 V
±
15 V
3.0
0.15
3.3
0.15
55
–2–
REV. B
AD812
Model
Conditions
OUTPUT CHARACTERISTICS
Output Voltage Swing
Output Current
Short Circuit Current
Output Resistance
MATCHING CHARACTERISTICS
Dynamic
Crosstalk
Gain Flatness Match
DC
Input offset Voltage
–Input Bias Current
POWER SUPPLY
Operating Range
Quiescent Current
G = +2, R
F
= 715
Ω
V
IN
= 2 V
Open-Loop
R
L
= 150
Ω,
T
MIN
–T
MAX
R
L
= 1 kΩ, T
MIN
–T
MAX
V
S
±
5 V
±
15 V
±
5 V
±
15 V
±
15 V
±
15 V
Min
3.5
13.6
30
40
AD812A
Typ
3.8
14.0
40
50
100
15
Max
Units
±
V
±
V
mA
mA
mA
Ω
G = +2, f = 5 MHz
G = +2, f = 40 MHz
T
MIN
–T
MAX
T
MIN
–T
MAX
±
5 V,
±
15 V
±
15 V
±
5 V,
±
15 V
±
5 V,
±
15 V
±
1.2
–75
0.1
0.5
2
3.6
25
±
18
4.0
5.5
6.0
dB
dB
mV
µA
V
mA
mA
mA
dB
µA/V
µA/V
Per Amplifier
T
MIN
–T
MAX
±
5 V
±
15 V
±
15 V
3.5
4.5
Power Supply Rejection Ratio
Input Offset Voltage
–Input Current
+Input Current
V
S
=
±
1.5 V to
±
15 V
70
80
0.3
0.005
0.6
0.05
NOTES
1
Slew rate measurement is based on 10% to 90% rise time in the specified closed-loop gain.
Specifications subject to change without notice.
Single Supply
Model
(@ T
A
= +25 C, R
L
= 150
, unless otherwise noted)
V
S
+5 V
+3 V
+5 V
+3 V
+5 V
+3 V
+5 V, +3 V
+5 V, +3 V
+5 V, +3 V
+5 V
+3 V
+5 V
+3 V
Min
35
30
13
10
AD812A
Typ
50
40
20
18
125
60
3.5
1.5
18
0.07
0.15
0.06
0.15
Max
Units
MHz
MHz
MHz
MHz
V/µs
V/µs
nV/√Hz
pA/√Hz
pA/√Hz
%
%
Degrees
Degrees
Conditions
DYNAMIC PERFORMANCE
–3 dB Bandwidth
Bandwidth for 0.1 dB
Flatness
Slew Rate
1
NOISE/HARMONIC PERFORMANCE
Input Voltage Noise
Input Current Noise
Differential Gain Error
2
Differential Phase Error
2
G = +2, No Peaking
G = +2
G = +2, R
L
= 1 kΩ
f = 10 kHz
f = 10 kHz, +In
f = 10 kHz, –In
NTSC, G = +2, R
L
= 150
Ω
G = +1
G = +2
G = +1
REV. B
–3–
AD812–SPECIFICATIONS
Single Supply (Continued)
Model
DC PERFORMANCE
Input Offset Voltage
T
MIN
–T
MAX
Offset Drift
–Input Bias Current
T
MIN
–T
MAX
+Input Bias Current
Open-Loop Voltage Gain
Open-Loop Transresistance
INPUT CHARACTERISTICS
Input Resistance
Input Capacitance
Input Common Mode
Voltage Range
Common-Mode Rejection Ratio
Input Offset Voltage
–Input Current
+Input Current
Input Offset Voltage
–Input Current
+Input Current
OUTPUT CHARACTERISTICS
Output Voltage Swing p-p
T
MIN
–T
MAX
V
O
= +2.5 V p-p
V
O
= +0.7 V p-p
V
O
= +2.5 V p-p
V
O
= +0.7 V p-p
+Input
–Input
+Input
+5 V, +3 V
+5 V
+3 V
+5 V
+3 V
+5 V
+5 V
+5 V
+3 V
V
CM
= 1.25 V to 3.75 V
+5 V
1.0
1.0
52
55
3
0.1
52
3.5
0.1
3.2
3.1
1.3
30
25
40
67
250
0.2
73
70
400
300
15
90
2
4.0
2.0
+5 V, +3 V
+5 V, +3 V
7
2
Conditions
V
S
+5 V, +3 V
Min
AD812A
Typ
1.5
Max
4.5
7.0
20
30
1.5
2.0
Units
mV
mV
µV/°C
µA
µA
µA
µA
dB
dB
kΩ
kΩ
MΩ
Ω
pF
V
V
dB
µA/V
µA/V
dB
µA/V
µA/V
V p-p
V p-p
V p-p
mA
mA
mA
5.5
0.2
V
CM
= 1 V to 2 V
+3 V
R
L
= 1 kΩ, T
MIN
–T
MAX
R
L
= 150
Ω,
T
MIN
–T
MAX
Output Current
Short Circuit Current
MATCHING CHARACTERISTICS
Dynamic
Crosstalk
Gain Flatness Match
DC
Input offset Voltage
–Input Bias Current
POWER SUPPLY
Operating Range
Quiescent Current
G = +2, R
F
= 715
Ω
V
IN
= 1 V
+5 V
+5 V
+3 V
+5 V
+3 V
+5 V
3.0
2.8
1.0
20
15
G = +2, f = 5 MHz
G = +2, f = 20 MHz
T
MIN
–T
MAX
T
MIN
–T
MAX
+5 V, +3 V
+5 V, +3 V
+5 V, +3 V
+5 V, +3 V
2.4
–72
0.1
0.5
2
3.5
25
36
4.0
3.5
4.5
dB
dB
mV
µA
V
mA
mA
mA
dB
µA/V
µA/V
Per Amplifier
T
MIN
–T
MAX
+5 V
+3 V
+5 V
70
3.2
3.0
Power Supply Rejection Ratio
Input Offset Voltage
–Input Current
+Input Current
TRANSISTOR COUNT
V
S
= +3 V to +30 V
80
0.3
0.005
56
0.6
0.05
NOTES
1
Slew rate measurement is based on 10% to 90% rise time in the specified closed-loop gain.
2
Single supply differential gain and phase are measured with the ac coupled circuit of Figure 53.
Specifications subject to change without notice.
–4–
REV. B
