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VDSL, Dual Line Driver with Shutdown AD8398
FEATURES
Current feedback Wide output swing 18.8 V p-p differential, (50 RLOAD) from 12 V supply 20.0 V p-p differential, (100 RLOAD) from 12 V supply 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 (AV DIFF = +2 dB, -3 dB) 900 V/s slew rate (RLOAD = 50 )
PIN CONFIGURATION
16 OUT A 15 NC 14 VCC 13 OUT B
NC 1 -IN A 2 +IN A 3 GND 4 NC = NO CONNECT
- + - +
12 NC 11 -IN B 10 +IN B 9 PD1
PD0 8
VEE 7
NC 5
NC 6
Figure 1. Thermally Enhanced, 4 mm x 4 mm, 16-Lead LFCSP_VQ
TYPICAL APPLICATION
1/2
AD8398
VMID*
APPLICATIONS
VDSL line driver Consumer xDSL modems Twisted pair line drivers
1/2
06919-002
AD8398
VCC - VEE *VMID = 2
Figure 2. Typical PLC Driver Application
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 x 4 mm, 16-lead LFCSP.
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 -40C to +85C.
For more information about the AD8398 email: amplifiers.comparators@analog.com.
Rev. Sp0
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. 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 (c)2007 Analog Devices, Inc. All rights reserved.
06919-001
AD8398 NOTES
(c)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

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