Ultralow Power, Adaptive Linear Power, Dual-Port ADSL/ADSL2+ Line Driver Data Sheet ADLD8403 FEATURES INTERNAL SCHEMATIC VCC VCCP 2 differential DSL channels comprising current feedback, high output current amplifiers with integrated feedback INPA resistors plus biasing network VOPA VCC Ideal for use as ADSL/ADSL2+ dual-channel central office (CO) line drivers 4k Low power consumption using Class H technology A = 13V/V VCOM A V Single 12.5 V supply operation 4k 20.4 dBm line power, 1:1 transformer VONA Less than 600 mW per channel total power dissipation INNA while driving 20.4 dBm (includes 110 mW line power) Less than 275 mW per channel total power dissipation VEEP while driving 14.5 dBm (including line power) Figure 1. Channel A Internal Schematic High output voltage and current drive 43.4 V differential output voltage swing Low distortion 65 dBc typical multitone power ratio (MTPR) at 20.4 dBm, 26 kHz to 2.2 MHz Low cost protection components enable ITU-T-K20 and GR-1089 compliance APPLICATIONS ADSL/ADSL2+ CO line drivers GENERAL DESCRIPTION The ADLD8403 comprises two differential, high output current, The ADLD8403 is available in a 4 mm 4 mm, 20-lead LFCSP. 18 low power consumption operational amplifiers. It is particularly well suited for the CO driver interface in digital subscriber line 14 systems, such as ADSL and ADSL2+. The driver can deliver 20.4 dBm to a line while compensating for losses due to hybrid 10 insertion and back termination resistors. The ADLD8403 uses the Analog Devices, Inc., second generation Adaptive Linear 6 Power (Class H) architecture to achieve unprecedented power efficiency using a single power supply. Additional functionality 2 allows the shutdown of pumps for enhanced power savings for line powers of less than 14.5 dBm. This functionality yields the 2 VOPA VONB smallest printed circuit board (PCB) footprint and lowest total VONA VCCP VOPB VEEP cost of ownership. 6 0 1 2 3 4 5 6 7 8 9 10 The low power consumption, high output current, high TIME (s) output voltage swing, and robust thermal packaging enable Figure 2. Outputs and Pumps Time Domain Response, Typical ADSL/ADSL2+ Application Circuit, VCC = 12.5 V, POUT = 20.4 dBm, Crest Factor = 5.45 the ADLD8403 to be the CO line driver in ADSL and other xDSL systems. Rev. D 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 One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. rights of third parties that may result from its use. Specifications subject to change without notice. No Tel: 781.329.4700 20142017 Analog Devices, Inc. All rights reserved. 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. Technical Support www.analog.com VOLTAGE (V) 08848-001 08848-002ADLD8403 Data Sheet TABLE OF CONTENTS Features .............................................................................................. 1 Theory of Operation .........................................................................7 Applications ....................................................................................... 1 Applications Information .................................................................8 Internal Schematic ............................................................................ 1 Supplies, Grounding, and Layout ................................................8 General Description ......................................................................... 1 Power Management ......................................................................8 Revision History ............................................................................... 2 Dynamic Supplies ..........................................................................8 Specifications ..................................................................................... 3 Typical ADSL/ADSL2+ Application ...........................................8 Absolute Maximum Ratings ............................................................ 4 Multitone Power Ratio (MTPR) ..................................................9 Thermal Resistance ...................................................................... 4 Lightning and AC Power Fault ....................................................9 Maximum Power Dissipation ..................................................... 4 Outline Dimensions ....................................................................... 10 ESD Caution .................................................................................. 4 Ordering Guide .......................................................................... 10 Pin Configuration and Function Descriptions ............................. 5 Typical Performance Characteristics ............................................. 6 REVISION HISTORY 3/2017Rev. C to Rev. D Changed LFCSP WQ to LFCSP .................................. Throughout Change to Table 3 ............................................................................. 4 Updated Outline Dimensions ....................................................... 10 Changes to Ordering Guide .......................................................... 10 9/2014Revision C: Initial Version Rev. D Page 2 of 10