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AD829AR Datasheet(Fiches technique) 1 Page - Analog Devices

Numéro de pièce AD829AR
Description  High Speed, Low Noise Video Op Amp
Télécharger  20 Pages
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Fabricant  AD [Analog Devices]
Site Internet  http://www.analog.com
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High Speed, Low Noise
Video Op Amp
Data Sheet
AD829
Rev. I
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibilityisassumedbyAnalogDevicesforitsuse,norforanyinfringementsofpatentsorother
rightsofthirdpartiesthatmayresultfromitsuse.Specificationssubjecttochangewithoutnotice.No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.
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.
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
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.
CONNECTION DIAGRAM
Figure 1. 8-Lead PDIP (N), CERDIP (Q), and SOIC (R)
Figure 2. 20-Terminal LCC
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.
2. 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).
3. The AD829 can drive heavy capacitive loads.
4. Performance is fully specified for operation from ±5 V
to ±15 V supplies.
5. 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).
AD829
TOP VIEW
(Not to Scale)
OFFSET NULL
1
–IN
2
+IN
3
–VS 4
OFFSET NULL
+VS
OUTPUT
CCOMP
8
7
6
5
20 19
1
2
3
18
14
15
16
17
4
5
6
7
8
9
10 11 12 13
NC
+V
NC
OUTPUT
NC
NC = NO CONNECT
NC
–IN
NC
+IN
NC
AD829
TOP VIEW
(Not to Scale)




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