ANALOG DEVICES AD8398 Service Manual
*V
VDSL, Dual Line Driver with Shutdown
FEATURES
Current feedback
Wide output swing
18.8 V p-p differential, (50 Ω R
20.0 V p-p differential, (100 Ω R
High output current
Linear output current of 250 mA peak
Low distortion
−100 dBc typical at 200 kHz
−76 dBc typical at 4 MHz
−66 dBc typical at 8 MHz
−56 dBc typical at 16 MHz
Low quiescent current
15 mA total
High speed
200 MHz bandwidth (A
900 V/μs slew rate (R
V DIFF
LOAD
= 50 Ω)
APPLICATIONS
VDSL line driver
Consumer xDSL modems
Twisted pair line drivers
GENERAL DESCRIPTION
The AD8398 comprises two high-speed current feedback
operational amplifiers. The high output current, high bandwidth, and fast slew rate make it particularly well suited as the
line driver in VDSL and VDSL2 applications. The AD8398 is
available in a thermally enhanced 4 mm × 4 mm, 16-lead LFCSP.
For more information about the AD8398 email: amplifiers.comparators@analog.com.
) from 12 V supply
LOAD
) from 12 V supply
LOAD
= +2 dB, −3 dB)
Figure 1. Thermally Enhanced, 4 mm × 4 mm, 16-Lead LFCSP_VQ
The AD8398 incorporates power management functionality via
two CMOS-compatible control pins, PD0 and PD1. These pins
select one of four operating modes: full power, medium power,
low power, and complete power down. In the power-down
mode, the quiescent current drops to 1.2 mA.
The AD8398 operates in the extended industrial temperature
range of −40°C to +85°C.
PIN CONFIGURATION
NC
OUT A
15
16
1NC
–
2−IN A
3+IN A
+
4GND
NC = NO CONNECT
5
6
NC
NC
TYPICAL APPLICATION
1/2
AD8398
V
*
MID
1/2
–
V
CC
=
MID
2
Figure 2. Typical PLC Driver Application
AD8398
V
EE
AD8398
B
CC
OUT
V
13
14
12 NC
–
11 −IN B
+
10 +IN B
9PD1
8
7
EE
V
PD0
6919-001
06919-002
Rev. Sp0
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibility is assumed by Anal og Devices for its use, nor for any infringements of patents or ot her
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.
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 ©2007 Analog Devices, Inc. All rights reserved.
AD8398
NOTES
©2007 Analog Devices, Inc. All rights reserved. Trademarks and
registered trademarks are the property of their respective owners.
D06919F-0-8/07(Sp0)
Rev. Sp0 | Page 2 of 2
Loading...