LE87536NQCT Microchip

Le87536 Worldwide ADSL2+ Dual Channel Line Driver BD870 Series Advance Data Sheet Version 2 Aug 2010 Features Document Number 134329 Fixed Voltage Gain Of 13 450 mA Peak Output Drive Capability Ordering Information Le87536NQC 16 pin QFN Green Pkg. Tray 5 V to 12 V Dual Supplies Or 10 V to 24 V Le87536NQCT 16 pin QFN Green Pkg. Tape & Reel Single Supply The green package meets RoHS Directive 2002/95/EC of the 44 V Differential Output Into a 100 Load European Council to minimize the environmental impact of electrical p-p equipment. 40.5 V Differential Output Into a 60 Load p-p Low-power Disable Mode For Each Driver 4 mA Per Amplifier Quiescent Supply Current Logic VS+ ENAB Control -75dBc THD With 1MHz Signal Into a 60 load VS- 16-pin (4 mm x 4 mm) QFN Package Logic ENCD Control GND RoHS Compliant VINA + VOUTA Applications VS+ A 7.5k . R F Dual Port Full Rate ADSL2+ Line Drivers 50k . HDSL Line Drivers VCMAB R G R Description F 50k . 7.5k . The Le87536 is a dual channel differential amplifier VS- VOUTB designed to drive full rate ADSL2+ signals with very B VINB low power dissipation. The Le87536 contains two pairs of wide band amplifiers designed with Zarlinks HV30 VINC + VS+ VOUTC C Bipolar SOI process for low power consumption in DSL systems. The amplifiers have an internal fixed 7.5k . R F gain, which helps to eliminate external feedback and 50k . gain setting resistors. VCMCD R G The drivers achieve better than -75dB THD while R F 50k . driving a 1MHz, 16Vp p signal into a 60 load. The 7.5k . amplifiers are enabled by forcing the ENAB/ENCD pins to ground. Leaving the ENAB/ENCD pins floating VS- VOUTD D VIND or forcing them high will disable the two amplifiers. The ENAB and ENCD pins are pulled up to an internal 2.5V through on-chip 50k resistors. Figure 1 - Block Diagram Le87536 device is one of the most cost-effective and high performance line drivers for ADSL2+ applications. 1 Zarlink Semiconductor Inc. Zarlink, ZL, the Zarlink Semiconductor logo are trademarks of Zarlink Semiconductor Inc Copyright 2009, Zarlink Semiconductor Inc. All Rights Reserved. + + Le87536 Advance Data Sheet 1.0 Pin Diagram . 3 1.1 Pin Description 3 2.0 Applications . 5 2.1 Typical Application Circuit 5 2.1.1 Input Considerations . 5 2.1.2 Output Driving Considerations 6 2.1.3 Power Supplies and Component Placement . 6 2.1.4 Stability 6 2.2 Cable Termination Technique . 6 2.3 Line Driver Protection . 8 3.0 Absolute Maximum Ratings 9 3.1 Thermal Resistance . 9 3.2 Package Assembly . 9 4.0 Operating Ranges . 10 5.0 Device Specifications 10 6.0 Physical Dimensions . 12 6.1 16-Pin QFN 12 7.0 Revision History . 13 7.1 Rev 1.0 to Rev 2.0 . 13 Zarlink documents markedPreliminary Data Sheet or Advance Data Sheet relate to Zarlink products which are not yet released to production. 2 Zarlink Semiconductor Inc.