AD828 Analog Devices, AD828 Datasheet

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AD828

Manufacturer Part Number
AD828
Description
Dual, Low Power Video Op Amp
Manufacturer
Analog Devices
Datasheet

Specifications of AD828

-3db Bandwidth
130MHz
Slew Rate
450V/µs
Vos
500µV
Ib
3.3µA
# Opamps Per Pkg
2
Input Noise (nv/rthz)
10nV/rtHz
Vcc-vee
5V to 36V
Isy Per Amplifier
7.5mA
Packages
DIP,SOIC

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a
GENERAL DESCRIPTION
The AD828 is a low cost, dual video op amp optimized for use
in video applications that require gains of +2 or greater and
high output drive capability, such as cable driving. Due to its
low power and single-supply functionality, along with excellent
differential gain and phase errors, the AD828 is ideal for power-
sensitive applications such as video cameras and professional
video equipment.
With video specs like 0.1 dB flatness to 40 MHz and low
differential gain and phase errors of 0.01% and 0.05°, along
with 50 mA of output current per amplifier, the AD828 is an
excellent choice for any video application. The 130 MHz gain
bandwidth and 450 V/µs slew rate make the AD828 useful in
many high speed applications, including video monitors, CATV,
color copiers, image scanners, and fax machines.
REV. C
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. No license is granted by implication or otherwise
under any patent or patent rights of Analog Devices.
FEATURES
V
Excellent Video Performance
High Speed
Low Power
High Output Drive Capability
Flexible Power Supply
Excellent DC Performance
Available in 8-Lead SOIC and 8-Lead Plastic Mini-DIP
IN
Differential Gain and Phase Error of 0.01% and 0.05
130 MHz 3 dB Bandwidth (G = +2)
450 V/ s Slew Rate
80 ns Settling Time to 0.01%
15 mA Max Power Supply Current
50 mA Minimum Output Current per Amplifier
Ideal for Driving Back Terminated Cables
Specified for +5 V,
2.0 mV Input Offset Voltage
3.2 V Min Output Swing into a 150
(V
S
1k
=
R
75
T
Figure 1. Video Line Driver
5 V)
AD828
1/2
+V
–V
5 V, and
0.1 F
1k
0.1 F
15 V Operation
R
75
BT
75
Load
R
75
T
The AD828 is fully specified for operation with a single 5 V
power supply and with dual supplies from ± 5 V to ± 15 V. This
power supply flexibility, coupled with a very low supply current
of 15 mA and excellent ac characteristics under all power supply
conditions, make the AD828 the ideal choice for many demand-
ing yet power-sensitive applications.
The AD828 is a voltage feedback op amp that excels as a gain
stage (gains > +2) or active filter in high speed and video systems
and achieves a settling time of 45 ns to 0.1%, with a low input
offset voltage of 2 mV max.
The AD828 is available in low cost, small 8-lead plastic mini-DIP
and SOIC packages.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700
Fax: 781/326-8703
0.07
0.06
0.05
0.04
Figure 2. Differential Phase vs. Supply Voltage
5
FUNCTIONAL BLOCK DIAGRAM
OUT1
–IN1
+IN1
V–
DIFF PHASE
2
1
3
4
SUPPLY VOLTAGE –
AD828
Dual, Low Power
10
DIFF GAIN
Video Op Amp
© Analog Devices, Inc., 2002
V
8
7
6
5
–IN2
V+
OUT2
+IN2
AD828
www.analog.com
15
0.02
0.01
0.03

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AD828 Summary of contents

Page 1

... AD828 the ideal choice for many demand- ing yet power-sensitive applications. The AD828 is a voltage feedback op amp that excels as a gain stage (gains > +2) or active filter in high speed and video systems and achieves a settling time 0.1%, with a low input offset voltage max ...

Page 2

... AD828–SPECIFICATIONS Parameter DYNAMIC PERFORMANCE –3 dB Bandwidth Bandwidth for 0.1 dB Flatness Full Power Bandwidth * Slew Rate Settling Time to 0.1% Settling Time to 0.01% NOISE/HARMONIC PERFORMANCE Total Harmonic Distortion Input Voltage Noise Input Current Noise Differential Gain Error = 150 Ω Differential Phase Error = 150 Ω) ...

Page 3

... ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily accumulate on the human body and test equipment and can discharge without detection. Although the AD828 features proprietary ESD protection circuitry, permanent damage may occur on devices subjected to high energy electrostatic discharges. Therefore, proper ESD precautions are recommended to avoid performance degradation or loss of functionality ...

Page 4

... AD828 —Typical Performance Characteristics – SUPPLY VOLTAGE – TPC 1. Common-Mode Voltage Range vs. Supply Voltage 500 SUPPLY VOLTAGE – TPC 2. Output Voltage Swing vs. Supply Voltage 15V 100 LOAD RESISTANCE – ...

Page 5

... TPC 12. Power Supply Rejection vs. Frequency –5– AD828 PHASE 5V OR 15V SUPPLIES 15V SUPPLIES 5V SUPPLIES 10k 100k 1M 10M 100M FREQUENCY – Hz 15V 5V 1k LOAD RESISTANCE – +SUPPLY –SUPPLY 1k ...

Page 6

... AD828 140 120 100 10k 100k FREQUENCY – Hz TPC 13. Common-Mode Rejection vs. Frequency 150 100k 1M FREQUENCY – Hz TPC 14. Large Signal Frequency Response 0.1% 0.01 0.01 SETTLING TIME TPC 15. Output Swing and Error vs. Settling Time – ...

Page 7

... FREQUENCY – 100k 1M 10M FREQUENCY – 0 OUT 1/2 1 AD828 AD828 USE GROUND PLANE PINOUT SHOWN IS FOR MINI-DIP PACKAGE TPC 24. Crosstalk Test Circuit AD828 = 15V S 100M = 15V 100M ...

Page 8

... AD828 3 PULSE (LS FUNCTION (SS GENERATOR V 1 AD828 3 0. 3.3 F –V S TPC 25. Inverting Amplifier Connection 2V 100 TPC 26. Inverter Large Signal Pulse Response Ω pF 200mV 100 200mV TPC 27. Inverter Small Signal Pulse Response Ω ...

Page 9

... S 50ns 100 TPC 35. Noninverting Small Signal Pulse Response 10ns 100 TPC 36. Noninverting Small Signal Pulse Response –9– AD828 5V 50ns 5V Ω pF 100mV 10ns 200mV Ω pF 150 F L 100mV 10ns 200mV Ω ...

Page 10

... The output buffer stage employs emitter followers in a class AB amplifier that delivers the necessary current to the load while maintaining low levels of distortion. The AD828 will drive terminated cables and capacitive loads less. As the closed-loop gain is increased, the AD828 will drive heavier cap loads without oscillating. –IN +IN Figure 4 ...

Page 11

... Full-Duplex Transmission Superior load handling capability (50 mA min/amp), high bandwidth, wide supply voltage range, and excellent crosstalk rejection makes the AD828 an ideal choice for even the most demanding high speed transmission applications. The schematic below shows a pair of AD828s configured to drive 100 feet of coaxial cable in a full-duplex fashion. ...

Page 12

... this application, one half of the AD828 operates at a gain of +2.1 and supplies the current to the load, while the other provides the overall system gain of +2. This is important for two reasons: the first is to keep the bandwidth of both amplifiers the same, and the second is to preserve the AD828’ ...

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