AD815AYS Analog Devices, AD815AYS Datasheet

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AD815AYS

Manufacturer Part Number
AD815AYS
Description
18V; 20mA; high output current differential driver. For ADSL, HDLS and VDSL line interface driver, coil or transformer driver
Manufacturer
Analog Devices
Datasheet

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a
PRODUCT 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
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.
15 V supplies. This can be increased further with the use of a
FEATURES
Flexible Configuration
High Output Power
Low Distortion
High Speed
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
Thermally Enhanced SOIC
Differential Input and Output Driver
or Two Single-Ended Drivers
Power Package
–66 dB @ 1 MHz THD, R
0.05% and 0.45 Differential Gain and Phase, R
120 MHz Bandwidth (–3 dB)
900 V/ s Differential Slew Rate
70 ns Settling Time to 0.1%
26 dBm Differential Line Drive for ADSL Application
40 V p-p Differential Output Voltage, R
500 mA Minimum Output Drive/Amp, R
400 mA Minimum Output Drive/Amp, R
(6 Back-Terminated Video Loads)
–100
–110
–40
–50
–60
–70
–80
–90
Total Harmonic Distortion vs. Frequency
100
V
G = +10
V
R
(DIFFERENTIAL)
S
OUT
L
= 50
=
= 40V p-p
1k
15V
FREQUENCY – Hz
10k
L
= 200
100k
R
(DIFFERENTIAL)
L
, V
= 200
OUT
1M
= 40 V p-p
L
L
L
= 50
= 5
= 10
L
10M
= 25
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700
Fax: 781/326-8703
coupling transformer with a greater than 1:1 turns ratio. The
low harmonic distortion of –66 dB @ 1 MHz into 200
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/ s 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
loads to be driven.
Three package styles are available, and all work over the
industrial temperature range (–40 C to +85 C). Maximum
output power is achieved with the power package available for
through-hole mounting (Y) and surface-mounting (VR). The
24-lead SOIC (RB) is capable of driving 26 dBm for full rate
ADSL with proper heat sinking.
V
4Vp-p
IN
15-Lead Through-Hole SIP (Y) and Surface-Mount
=
100
100
110
FUNCTIONAL BLOCK DIAGRAM
REFER TO PAGE 3 FOR 24-LEAD SOIC PACKAGE
Subscriber Line Differential Driver
TAB IS
+V
S
AMP2
AMP1
+15V
–15V
G = +10
499
499
World Wide Web Site: http://www.analog.com
AD815
AD815
1/2
NC = NO CONNECT
High Output Current
1/2
DDPAK(VR)
AD815
Differential Driver
V
40Vp-p
D
enable up to 12 back-terminated
=
R
R
1
2
= 15
= 15
TRANSFORMER
© Analog Devices, Inc., 1999
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
1:2
AD815
R
120
NC
NC
NC
NC
+IN2
–IN2
OUT2
+V
–V
OUT1
–IN1
+IN1
NC
NC
NC
L
S
S
V
40Vp-p
OUT
=

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AD815AYS Summary of contents

Page 1

... FREQUENCY – Hz Total Harmonic Distortion vs. Frequency 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 ...

Page 2

AD815–SPECIFICATIONS Model DYNAMIC PERFORMANCE Small Signal Bandwidth (–3 dB) Bandwidth (0.1 dB) Differential Slew Rate Settling Time to 0.1% NOISE/HARMONIC PERFORMANCE Total Harmonic Distortion Input Voltage Noise Input Current Noise (+ Input Current Noise (– Differential ...

Page 3

... AD815ARB-24-REEL – +85 C AD815AVR – +85 C AD815AY – +85 C AD815AYS – +85 C AD815-EB CAUTION 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. ...

Page 4

AD815–Typical Performance Characteristics AD815 SUPPLY VOLTAGE – Figure 1. Input Common-Mode Voltage Range vs. Supply Voltage LOAD (SINGLE-ENDED SUPPLY ...

Page 5

V = 15V S –12 –14 –40 – JUNCTION TEMPERATURE – C Figure 7. Input Offset Voltage vs. Temperature 750 700 SOURCE 650 600 SINK 550 500 450 –60 –40 –20 ...

Page 6

AD815 100 INVERTING INPUT CURRENT NOISE 10 NONINVERTING INPUT CURRENT NOISE INPUT VOLTAGE NOISE 1 10 100 1k FREQUENCY – Hz Figure 13. Input Current and Voltage Noise vs. Frequency SIDE 562 562 40 ...

Page 7

OUTPUT STEP SIZE – V p-p Figure 19. Slew Rate vs. Output Step Size –85 SIDE B –80 SIDE A –75 –70 SIDE A SIDE B –65 –60 ...

Page 8

AD815 6 BACK TERMINATED LOADS (25 ) 0.04 0.03 0.02 PHASE 0.01 0.00 –0.01 –0.02 GAIN –0.03 –0. BACK TERMINATED LOADS (75 ) 0.010 0.005 PHASE 0.000 GAIN –0.005 –0.010 –0.015 GAIN ...

Page 9

F 8 1/2 AD815 100 PULSE GENERATOR –15V 250ps R F Figure 31. Test Circuit, Gain = +1 SIDE A SIDE B 100mV Figure 32. 500 mV Step ...

Page 10

AD815 SIDE A SIDE B 1V Figure 39 Step Response –1 THEORY OF OPERATION The AD815 is a dual current feedback amplifier with high (500 mA) output current capability. Being a current feedback amplifier, the AD815’s ...

Page 11

DC ERRORS AND NOISE There are three major noise and offset terms to consider in a current feedback amplifier. For offset errors refer to the equation below. For noise error the terms are root-sum-squared to give a net output error. ...

Page 12

AD815 Other Power Considerations There are additional power considerations applicable to the AD815. First, as with many current feedback amplifiers, there is an increase in supply current when delivering a large peak-to-peak voltage to a resistive load at high frequencies. ...

Page 13

F 100 AD826 100 1/2 AD826 7 100 5 4 0.1 F –15V Figure 50. Differential Driver with Single-Ended Differential Converter Another means for creating a ...

Page 14

AD815 ~ 20pF R +15V F 499 499 1/2 AMP1 6 AD815 250 499 499 (50 ) (OPTIONAL 499 499 10 ...

Page 15

Figure 56. AD815 AVR Evaluation Board Assembly Drawing Figure 57. AD815 AVR Evaluation Board Layout (Component Side) REV. B Figure 58. AD815 AVR Evaluation Board Layout (Solder Side) –15– AD815 ...

Page 16

AD815 15-Lead Surface Mount DDPAK (VR-15) 0.110 (2.79) 0.152 (3.86) 0.394 BSC 0.148 (3.76) (10.007) 0.137 (3.479) TYP 0.042 (1.066) TYP 0.080 (2.03 0.065 (1.65) 2 PLACES PIN 1 0.079 (2.006) 0.600 (15.24) DIA 0.146 (3.70) BSC 2 ...

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