LE87220KQCT

LE87220KQCT Datasheet

Le87220

Part	Datasheet
LE87220KQCT	LE87220KQCT (pdf)

Related Parts	Information
LE87220KQC	LE87220KQC

PDF Datasheet Preview
Le87220 Worldwide xDSL Dual Channel Line Driver BD870 Series - Asymmetrical Digital Subscriber Loop ADSL, ADSL+, ADSL2, ADSL2+ Line Drivers - G.lite Line Drivers - HDSL, HDSL2, HDSL4, SHDSL Line Drivers - DSLAM, CO, DLC, BLC, MDU/MTU Line Drivers - Two-channel differential line drivers - Low power 720 mW per channel, typical ADSL+ Mode showtime, >5 kft 26 AWG cable, not including load 670 mW per channel, typical ADSL Mode showtime, >5 kft 26 AWG cable, not including load - Operates directly from a typical telecom power supply without a DC-to-DC converter and a V supply - Integrated lightning and surge protection - 50 VP differential signal at the driver outputs - IOUT max 95 mA into load - MTPR of 70 dB, typical - Minimum external component count ~ 10 discretes per channel - Can output dBm power into load with step down transformer - Thermal shutdown - Small footprint 24-pin 6 x 6 mm QFN RELATED LITERATURE - 080791 Quad Flat No-Lead QFN Package Application Note The Le87220 device, from the Zarlink Battery Direct family BD870 series devices, integrates two fully differential line drivers, optimized feed back components, on-chip surge protection diodes and bias control stages into a small 6 x 6 mm2 QFN package. It contains all the active components needed to implement ADSL2+ downstream transmitters for two lines. The Le87220 device is built on Zarlink’s high-voltage process that allows for direct operation from a standard telecom, negative battery supply and a 3.3-V supply . In contrast, typical line cards today supply the power to the line drivers locally, via DC-to-DC converter modules. The elimination of these additional modules translates into cost and power savings at the system level. Operation from a centralized source of power makes the Le87220 device a unique, less costly, more efficient solution for xDSL line driver applications. The Le87220 device is one of the most costeffective and easy-to-use parts for today’s xDSL applications. BLOCK DIAGRAM VCC AGND DDWNP1 + DDWNN1 VBIAS VBAT BGND AY1 ORDERING INFORMATION Device Le87220JQC Le87220KQC Package 24-pin QFN, 6 x 6 mm 24-pin QFN, 6 x 6 mm Green Package 1 Packing2 Tray The green package meets RoHS Directive 2002/95/EC of the European Council to minimize the environmental impact of electrical equipment. For delivery using a tape and reel packing system, add a "T" suffix to the OPN Ordering Part Number when placing an order. DDWNP2 + DDWNN2 CONTROL LOGIC1 + VBIAS + BY2 CONTROL LOGIC2 DISCON1 PDOWN1 DISCON2 PDOWN2 Document ID# 081111 Date Sep 20, 2007 Version 2 Distribution Public Document Le87220 Data Sheet TABLE OF CONTENTS Applications Features Related literature Ordering Information Description. Block Diagram Product Description Zarlink Semiconductor Inc. Le87220 Data Sheet PRODUCT DESCRIPTION The Le87220 device is a low-power, dual xDSL differential line driver. It is part of Zarlink’s family of integrated line drivers capable of operating from a standard negative battery supply. Its integration of feedback components and on-chip surge protection diodes makes it one of the most integrated line drivers on the market today. The Le87220 device was designed on a high voltage, high bandwidth bipolar process in which fast slew rate and low distortion amplifiers were implemented. It requires one line transformer per line for isolation and for compliance with IEC60950-1, 2001 and UL60950 standards. The line driver amplifiers in the Le87220 device were designed with an optimized bandwidth for xDSL applications as well as for fast slew rates of 300 V/µs. Lightning and Power Surges The Le87220 device has built-in lightning and power surge protection. When used with the components listed in the PCB Layout, on page 8, it needs no other external protector to meet the requirements for ADSL line Cards. Block Description Refer to the datapath provider for the application circuit. Downstream Path The downstream signal is applied at the DDWNP/DDWNN pins, and is amplified by a fixed voltage gain KDWN before being applied to the AY and BY pins. The amplifiers driving the AY and BY pins are DC biased to approximately one-half of the VBAT pin voltage. The typical differential output voltage swing between AY and BY pins is \|VBAT\| - 4 V. This allows the use of a stepdown transformer for the line interface. Control Logic This block controls the bias currents of the input stage and the bias current of the output amplifiers as described in the Device Operating Modes section below. DEVICE OPERATING MODES The two lines of the Le87220 are completely independent and can be programmed to be in different operating modes. The logic signal level of pins DISCON1 an Pdown1 controls the operating mode of line 1, the logic signal level of pins DISCON2 and Pdown2 controls the operating mode of line Active Mode In this mode, all stages are biased and operational. PDown Mode In this mode, the line driver amplifier’s power consumption is reduced. The Bias current in the output stage drops to almost half full power stage. The part is ADSL compliant in this stage. Disconnect Mode In this mode, the bias is turned OFF to all stages to save power. The device is not operational. Operating Mode Control Decoding DISCON1 0 1 Pdown1 0 1 x Line 1 Operating Mode Active Pdown Disabled DISCON2 0 1 Pdown2 0 1 x Line 2 Operating Mode Active Pdown Disabled Zarlink Semiconductor Inc. CONNECTION DIAGRAM Le87220 VBAT BGND AY N/C BY Top View N/C N/C N/C N/C DDWNN1 DDWNP1 24 23 22 21 20 19 Le87220JQC • Enhanced format of package drawing in Physical Dimensions, on page 9 • Added new headers/footers due to Zarlink purchase of Legerity on August 3, 2007 Data Sheet Zarlink Semiconductor Inc. For more information about all Zarlink products visit our Web Site at Information relating to products and services furnished herein by Zarlink Semiconductor Inc. or its subsidiaries collectively “Zarlink” is believed to be reliable. However, Zarlink assumes no liability for errors that may appear in this publication, or for liability otherwise arising from the application or use of any such information, product or service or for any infringement of patents or other intellectual property rights owned by third parties which may result from such application or use. Neither the supply of such information or purchase of product or service conveys any license, either express or implied, under patents or other intellectual property rights owned by Zarlink or licensed from third parties by Zarlink, whatsoever. Purchasers of products are also hereby notified that the use of product in certain ways or in combination with Zarlink, or non-Zarlink furnished goods or services may infringe patents or other intellectual property rights owned by Zarlink. This publication is issued to provide information only and unless agreed by Zarlink in writing may not be used, applied or reproduced for any purpose nor form part of any order or contract nor to be regarded as a representation relating to the products or services concerned. The products, their specifications, services and other information appearing in this publication are subject to change by Zarlink without notice. No warranty or guarantee express or implied is made regarding the capability, performance or suitability of any product or service. Information concerning possible methods of use is provided as a guide only and does not constitute any guarantee that such methods of use will be satisfactory in a specific piece of equipment. It is the user’s responsibility to fully determine the performance and suitability of any equipment using such information and to ensure that any publication or data used is up to date and has not been superseded. Manufacturing does not necessarily include testing of all functions or parameters. These products are not suitable for use in any medical products whose failure to perform may result in significant injury or death to the user. All products and materials are sold and services provided subject to Zarlink’s conditions of sale which are available on request. Purchase of Zarlink’s I2C components conveys a license under the Philips I2C Patent rights to use these components in an I2C System, provided that the system conforms to the I2C Standard Specification as defined by Philips. Zarlink, ZL, the Zarlink Semiconductor logo and the Legerity logo and combinations thereof, VoiceEdge, VoicePort, SLAC, ISLIC, ISLAC and VoicePath are trademarks of Zarlink Semiconductor Inc. TECHNICAL DOCUMENTATION - NOT FOR RESALE

PDF Datasheet Preview

Le87220

Worldwide xDSL Dual Channel Line Driver BD870 Series
- Asymmetrical Digital Subscriber Loop ADSL, ADSL+, ADSL2, ADSL2+ Line Drivers
- G.lite Line Drivers - HDSL, HDSL2, HDSL4, SHDSL Line Drivers - DSLAM, CO, DLC, BLC, MDU/MTU Line Drivers
- Two-channel differential line drivers - Low power
720 mW per channel, typical ADSL+ Mode showtime, >5 kft 26 AWG cable, not including load
670 mW per channel, typical ADSL Mode showtime, >5 kft 26 AWG cable, not including load
- Operates directly from a typical telecom power supply without a DC-to-DC converter and a V supply
- Integrated lightning and surge protection - 50 VP differential signal at the driver outputs - IOUT max 95 mA into load - MTPR of 70 dB, typical - Minimum external component count ~ 10 discretes per
channel - Can output dBm power into load with step
down transformer - Thermal shutdown - Small footprint
24-pin 6 x 6 mm QFN

RELATED LITERATURE
- 080791 Quad Flat No-Lead QFN Package Application Note

The Le87220 device, from the Zarlink Battery Direct family BD870 series devices, integrates two fully differential line drivers, optimized feed back components, on-chip surge protection diodes and bias control stages into a small 6 x 6 mm2 QFN package. It contains all the active components needed to implement ADSL2+ downstream transmitters for two lines. The Le87220 device is built on Zarlink’s high-voltage process that allows for direct operation from a standard telecom, negative battery supply and a 3.3-V supply . In contrast, typical line cards today supply the power to the line drivers locally, via DC-to-DC converter modules. The elimination of these additional modules translates into cost and power savings at the system level. Operation from a centralized source of power makes the Le87220 device a unique, less costly, more efficient solution for xDSL line driver applications. The Le87220 device is one of the most costeffective and easy-to-use parts for today’s xDSL applications.

BLOCK DIAGRAM

VCC AGND

DDWNP1 +

DDWNN1

VBIAS

VBAT BGND AY1
ORDERING INFORMATION

Device Le87220JQC

Le87220KQC

Package 24-pin QFN, 6 x 6 mm 24-pin QFN, 6 x 6 mm Green Package 1

Packing2 Tray

The green package meets RoHS Directive 2002/95/EC of the European Council to minimize the environmental impact of electrical equipment.
For delivery using a tape and reel packing system, add a "T" suffix to the OPN Ordering Part Number when placing an order.

DDWNP2 +

DDWNN2

CONTROL LOGIC1
+ VBIAS
+ BY2

CONTROL LOGIC2

DISCON1 PDOWN1 DISCON2 PDOWN2

Document ID# 081111 Date Sep 20, 2007

Version 2

Distribution Public Document

Le87220

Data Sheet

TABLE OF CONTENTS
Applications Features Related literature Ordering Information Description. Block Diagram Product Description

Zarlink Semiconductor Inc.

Le87220

Data Sheet

PRODUCT DESCRIPTION

The Le87220 device is a low-power, dual xDSL differential line driver. It is part of Zarlink’s family of integrated line drivers capable of operating from a standard negative battery supply. Its integration of feedback components and on-chip surge protection diodes makes it one of the most integrated line drivers on the market today.

The Le87220 device was designed on a high voltage, high bandwidth bipolar process in which fast slew rate and low distortion amplifiers were implemented. It requires one line transformer per line for isolation and for compliance with IEC60950-1, 2001 and UL60950 standards. The line driver amplifiers in the Le87220 device were designed with an optimized bandwidth for xDSL applications as well as for fast slew rates of 300 V/µs.

Lightning and Power Surges

The Le87220 device has built-in lightning and power surge protection. When used with the components listed in the PCB Layout, on page 8, it needs no other external protector to meet the requirements for ADSL line Cards.

Block Description

Refer to the datapath provider for the application circuit.

Downstream Path

The downstream signal is applied at the DDWNP/DDWNN pins, and is amplified by a fixed voltage gain KDWN before being applied to the AY and BY pins. The amplifiers driving the AY and BY pins are DC biased to approximately one-half of the VBAT pin voltage. The typical differential output voltage swing between AY and BY pins is |VBAT| - 4 V. This allows the use of a stepdown transformer for the line interface.

Control Logic

This block controls the bias currents of the input stage and the bias current of the output amplifiers as described in the Device Operating Modes section below.

DEVICE OPERATING MODES

The two lines of the Le87220 are completely independent and can be programmed to be in different operating modes. The logic signal level of pins DISCON1 an Pdown1 controls the operating mode of line 1, the logic signal level of pins DISCON2 and Pdown2 controls the operating mode of line

Active Mode

In this mode, all stages are biased and operational.

PDown Mode

In this mode, the line driver amplifier’s power consumption is reduced. The Bias current in the output stage drops to almost half full power stage. The part is ADSL compliant in this stage.

Disconnect Mode

In this mode, the bias is turned OFF to all stages to save power. The device is not operational.

Operating Mode Control Decoding

DISCON1 0 1

Pdown1 0 1 x

Line 1 Operating Mode Active Pdown

Disabled

DISCON2 0 1

Pdown2 0 1 x

Line 2 Operating Mode Active Pdown

Disabled

Zarlink Semiconductor Inc.

CONNECTION DIAGRAM

Le87220

VBAT BGND AY

N/C BY

Top View

N/C N/C N/C N/C DDWNN1 DDWNP1
24 23 22 21 20 19

Le87220JQC
• Enhanced format of package drawing in Physical Dimensions, on page 9
• Added new headers/footers due to Zarlink purchase of Legerity on August 3, 2007

Data Sheet

Zarlink Semiconductor Inc.

For more information about all Zarlink products visit our Web Site at

Information relating to products and services furnished herein by Zarlink Semiconductor Inc. or its subsidiaries collectively “Zarlink” is believed to be reliable. However, Zarlink assumes no liability for errors that may appear in this publication, or for liability otherwise arising from the application or use of any such information, product or service or for any infringement of patents or other intellectual property rights owned by third parties which may result from such application or use. Neither the supply of such information or purchase of product or service conveys any license, either express or implied, under patents or other intellectual property rights owned by Zarlink or licensed from third parties by Zarlink, whatsoever. Purchasers of products are also hereby notified that the use of product in certain ways or in combination with Zarlink, or non-Zarlink furnished goods or services may infringe patents or other intellectual property rights owned by Zarlink.

This publication is issued to provide information only and unless agreed by Zarlink in writing may not be used, applied or reproduced for any purpose nor form part of any order or contract nor to be regarded as a representation relating to the products or services concerned. The products, their specifications, services and other information appearing in this publication are subject to change by Zarlink without notice. No warranty or guarantee express or implied is made regarding the capability, performance or suitability of any product or service. Information concerning possible methods of use is provided as a guide only and does not constitute any guarantee that such methods of use will be satisfactory in a specific piece of equipment. It is the user’s responsibility to fully determine the performance and suitability of any equipment using such information and to ensure that any publication or data used is up to date and has not been superseded. Manufacturing does not necessarily include testing of all functions or parameters. These products are not suitable for use in any medical products whose failure to perform may result in significant injury or death to the user. All products and materials are sold and services provided subject to Zarlink’s conditions of sale which are available on request.

Purchase of Zarlink’s I2C components conveys a license under the Philips I2C Patent rights to use these components in an I2C System, provided that the system conforms to the I2C Standard Specification as defined by Philips. Zarlink, ZL, the Zarlink Semiconductor logo and the Legerity logo and combinations thereof, VoiceEdge, VoicePort, SLAC, ISLIC, ISLAC and VoicePath are trademarks of Zarlink Semiconductor Inc.

TECHNICAL DOCUMENTATION - NOT FOR RESALE

Notice: we do not provide any warranties that information, datasheets, application notes, circuit diagrams, or software stored on this website are up-to-date or error free. The archived LE87220KQCT Datasheet file may be downloaded here without warranties.

Datasheet ID: LE87220KQCT 648993