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AD815 Fiches technique(PDF) 1 Page - Analog Devices

No de pièce AD815
Description  High Output Current Differential Driver
Download  16 Pages
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Fabricant  AD [Analog Devices]
Site Internet  http://www.analog.com
Logo AD - Analog Devices

AD815 Fiches technique(HTML) 1 Page - Analog Devices

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FUNCTIONAL BLOCK DIAGRAM
TOP VIEW
(Not to Scale)
AD815
13
16
15
14
24
23
22
21
20
19
18
17
12
11
10
9
8
1
2
3
4
7
6
5
NC = NO CONNECT
NC
NC
NC
NC
NC
NC
NC
NC
+IN1
–IN1
–IN2
+IN2
OUT1
–VS
OUT2
+VS
*HEAT TABS ARE CONNECTED TO THE POSITIVE SUPPLY.
THERMAL
HEAT TABS
+VS*
THERMAL
HEAT TABS
+VS*
REV. C
a
High Output Current
Differential Driver
AD815
GENERAL DESCRIPTION
The AD815 consists of two high speed amplifiers capable of
supplying a minimum of 500 mA. They are typically configured
as a differential driver enabling an output signal of 40 V p-p on
±15 V supplies. This can be increased further with the use of a
coupling transformer with a greater than 1:1 turns ratio. The
low harmonic distortion of –66 dB @ 1 MHz into 200
FEATURES
Flexible Configuration
Differential Input and Output Driver
or Two Single-Ended Drivers
Industrial Temperature Range
High Output Power
Thermally Enhanced SOIC
400 mA Minimum Output Drive/Amp, RL = 10
Low Distortion
–66 dB @ 1 MHz THD, RL = 200
, VOUT = 40 V p-p
0.05% and 0.45 Differential Gain and Phase, RL = 25
(6 Back-Terminated Video Loads)
High Speed
120 MHz Bandwidth (–3 dB)
900 V/ s Differential Slew Rate
70 ns Settling Time to 0.1%
Thermal Shutdown
APPLICATIONS
ADSL, HDSL, and VDSL Line Interface Driver
Coil or Transformer Driver
CRT Convergence and Astigmatism Adjustment
Video Distribution Amp
Twisted Pair Cable Driver
FREQUENCY – Hz
–40
–50
–110
100
10M
1k
10k
100k
1M
–60
–70
–80
–90
–100
VS = 15V
G = +10
VOUT = 40V p-p
RL = 50
(DIFFERENTIAL)
RL = 200
(DIFFERENTIAL)
Figure 1. Total Harmonic Distortion vs. Frequency
AMP1
+15V
–15V
RL
120
110
499
VOUT =
40Vp-p
VIN =
4Vp-p
1/2
AD815
1/2
AD815
G = +10
100
100
AMP2
VD =
40Vp-p
1:2
TRANSFORMER
R1 = 15
R2 = 15
499
Figure 2. Subscriber Line Differential Driver
combined with the wide bandwidth and high current drive make
the differential driver ideal for communication applications such
as subscriber line interfaces for ADSL, HDSL and VDSL.
The AD815 differential slew rate of 900 V/
µs and high load drive
are suitable for fast dynamic control of coils or transformers,
and the video performance of 0.05% and 0.45
° differential gain
and phase into a load of 25
Ω enable up to 12 back-terminated
loads to be driven.
The 24-lead SOIC (RB) is capable of driving 26 dBm for full
rate ADSL with proper heat sinking.
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. Trademarks and
registered trademarks are the property of their respective owners.
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
© 2005 Analog Devices, Inc. All rights reserved.


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