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PDF AD8392A Data sheet ( Hoja de datos )
| Número de pieza | AD8392A | |
| Descripción | Dual-Channel ADSL/ADSL2+ Line Driver | |
| Fabricantes | Analog Devices | |
| Logotipo |  |
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Data Sheet
Low Power, High Output Current, Quad Op
Amp, Dual-Channel ADSL/ADSL2+ Line Driver
AD8392A
FEATURES
Four current feedback, high current amplifiers
Ideal for use as ADSL/ADSL2+ dual-channel central office
(CO) line drivers
Low power operation
Power supply operation from ±5 V (+10 V) up to ±12 V (+24 V)
Less than 3 mA/amp quiescent supply current for full
power ADSL/ADSL2+ CO applications (20.4 dBm line
power, 5.5 CF)
Three active power modes plus shutdown
High output voltage and current drive
500 mA peak output drive current
42.6 V p-p differential output voltage
Low distortion
−93 dBc @1 MHz second harmonic
−103 dBc @ 1 MHz third harmonic
High speed: 515 V/μs differential slew rate
Additional functionality of AD8392AACP
On-chip, common-mode voltage generation
APPLICATIONS
ADSL/ADSL2+ CO line drivers
XDSL line drivers
GENERAL DESCRIPTION
The AD8392A is comprised of four high output current, low
power consumption, operational amplifiers. It is particularly
well suited for the CO driver interface in digital subscriber line
systems, such as ADSL and ADSL2+. The driver is capable of
providing enough power to deliver 20.4 dBm to a line, while
compensating for losses due to hybrid insertion and back
termination resistors.
The AD8392A is available in two thermally enhanced packages,
a 28-lead TSSOP_EP (AD8392AARE) and a 5 mm × 5 mm,
32-lead LFCSP (AD8392AACP). Four bias modes are available
via the use of two digital bits (PD1, PD0).
Additionally, the AD8392AACP provides VCOM pins for on-chip,
common-mode voltage generation.
The low power consumption, high output current, high output
voltage swing, and robust thermal packaging enable the
AD8392A to be used as the CO line drivers in ADSL and other
xDSL systems.
PIN CONFIGURATIONS
VEE 1
PD0 1, 2 2
PD1 1, 2 3
+VIN1
–VIN1
VOUT1
VCC
4
5
6
7
NIC 8
VOUT3 9
–VIN3 10
+VIN3 11
NIC 12
NIC 13
GND 14
12
AD8392A
TOP VIEW
(Not To Scale)
34
28 GND
27 NIC
26 NIC
25 +VIN2
24 –VIN2
23 VOUT2
22 NIC
21 VCC
20 VOUT4
19 –VIN4
18 +VIN4
17 PD1 3, 4
16 PD0 3, 4
15 VEE
NOTES
1. NIC = NO INTERNAL CONNECTION.
2. EXPOSED PAD. CONNECT THE EXPOSED
PAD TO GROUND PLANE.
Figure 1. AD8392AARE, 28-Lead TSSOP_EP
NIC 1
–VIN1 2
VOUT1 3
VCC 4
NIC 5
VOUT3 6
–VIN3 7
NIC 8
32 31 30 29 28 27 26 25
12
AD8392A
TOP VIEW
(Not to Scale)
34
24 NIC
23 –VIN2
22 VOUT2
21 NIC
20 VCC
19 VOUT4
18 –VIN4
17 NIC
9 10 11 12 13 14 15 16
NOTES
1. NIC = NO INTERNAL CONNECTION.
2. EXPOSED PAD. CONNECT THE EXPOSED
PAD TO GROUND PLANE.
Figure 2. AD8392AACP, 5 mm × 5 mm, 32-Lead LFCSP
Rev. A
Document Feedback
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. Specifications subject to change without notice. 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 ©2006–2016 Analog Devices, Inc. All rights reserved.
Technical Support
www.analog.com
1 page  
AD8392A
ABSOLUTE MAXIMUM RATINGS
Table 2.
Parameter
Supply Voltage
Power Dissipation
Storage Temperature Range
Operating Temperature Range
Lead Temperature (Soldering 10 sec)
Junction Temperature
Rating
±13 V (+26 V)
See Figure 3
−65°C to +150°C
−40°C to +85°C
300°C
150°C
Stresses at or above those listed under Absolute Maximum
Ratings may cause permanent damage to the product. This is a
stress rating only; functional operation of the product at these
or any other conditions above those indicated in the operational
section of this specification is not implied. Operation beyond
the maximum operating conditions for extended periods may
affect product reliability.
THERMAL RESISTANCE
θJA is specified for the worst-case conditions, that is, θJA is specified
for the device soldered in the circuit board for surface-mount
packages.
Table 3.
Package Type
LFCSP-32 (CP)
TSSOP_EP (RE)
θJA
27.27
35.33
Unit
°C/W
°C/W
Maximum Power Dissipation
The power dissipated in the package (PD) is the sum of the
quiescent power dissipation and the power dissipated in the
package due to the load drive for all outputs. The quiescent
power is the voltage between the supply pins (VS) times the
quiescent current (IS). Assuming that the load (RL) is midsupply,
the total drive power is VS/2 × IOUT, some of which is dissipated
in the package and some in the load (VOUT × IOUT).
Data Sheet
RMS output voltages should be considered. If RL is referenced to
VS− as in single-supply operation, the total power is VS × IOUT.
In single supply with RL to VS−, worst case is VOUT = VS/2.
Airflow increases heat dissipation, effectively reducing θJA. In
addition, more metal directly in contact with the package leads
from metal traces, through holes, ground, and power planes
reduces the θJA.
Figure 3 shows the maximum safe power dissipation in the
package vs. the ambient temperature for the LFCSP-32 and
TSSOP_EP packages on a JEDEC standard 4-layer board.
θJA values are approximations.
7
TJ = 150°C
6
5
LFCSP-32
4
TSSOP-28/EP
3
2
1
0
–40 –30 –20 –10 0 10 20 30 40 50 60 70 80 90
TEMPERATURE (°C)
Figure 3. Maximum Power Dissipation vs. Temperature for a 4-Layer Board
See the Thermal Considerations section for additional thermal
design guidance.
ESD CAUTION
Rev. A | Page 4 of 12
5 Page 
AD8392A
MULTITONE POWER RATIO
The DMT signal used in ADSL/ADSL2+ systems carries data in
discrete tones or bins, which appear in the frequency domain in
evenly spaced 4.3125 kHz intervals. In applications using this
type of waveform, multitone power ratio (MTPR) is a commonly
used measure of linearity. MTPR is defined as the measured
difference from the peak of one tone that is loaded with data to
the peak of an adjacent tone that is intentionally left empty.
Figure 19 and Figure 20 show the AD8392A MTPR for a 5.5
crest factor waveform for empty bins in the ADSL and extended
ADSL2+ bandwidths.
0
–10
–20
–30
–40
–50
–60
–70
–80
–90
–100
CENTER 646.9kHz
Figure 19. MTPR at 647 kHz
SPAN 10kHz
Data Sheet
0
–10
–20
–30
–40
–50
–60
–70
–80
–90
–100
CENTER 1.9664kHz
Figure 20. MTPR at 1.966 MHz
SPAN 10kHz
Rev. A | Page 10 of 12
11 Page | ||
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| PDF Descargar | [ Datasheet AD8392A.PDF ] | |
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