Le87536
Worldwide ADSL2+ Dual Channel
Line Driver BD870 Series
Advance Data Sheet
Version 2
Aug 2010
134329
Features
Document Number
•
•
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Fixed Voltage Gain Of 13
450 mA Peak Output Drive Capability
Ordering Information
Le87536NQC
Le87536NQCT
16 pin QFN Green Pkg.
16 pin QFN Green Pkg.
Tray
Tape & Reel
±5 V to ±12 V Dual Supplies Or 10 V to 24 V
Single Supply
The green package meets RoHS Directive 2002/95/EC of the
European Council to minimize the environmental impact of electrical
equipment.
•
•
•
•
•
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44 V Differential Output Into a 100 Ω Load
p-p
40.5 V
Differential Output Into a 60 Ω Load
p-p
Low-power Disable Mode For Each Driver
4 mA Per Amplifier Quiescent Supply Current
-75dBc THD With 1MHz Signal Into a 60 Ω load
16-pin (4 mm x 4 mm) QFN Package
RoHS Compliant
Logic
Control
VS+
ENAB
VS-
Logic
Control
ENCD
VINA
GND
+
–
VOUTA
VS+
Applications
A
7.5kΩ
7.5kΩ
.
.
RF
•
•
Dual Port Full Rate ADSL2+ Line Drivers
HDSL Line Drivers
50kΩ
50kΩ
.
VCMAB
RG
RF
–
Description
.
The Le87536 is a dual channel differential amplifier
designed to drive full rate ADSL2+ signals with very
low power dissipation. The Le87536 contains two pairs
of wide band amplifiers designed with Zarlink’s HV30
Bipolar SOI process for low power consumption in
DSL systems. The amplifiers have an internal fixed
gain, which helps to eliminate external feedback and
gain setting resistors.
VS-
VOUTB
VOUTC
B
+
VINB
VINC
+
–
VS+
C
7.5kΩ
7.5kΩ
.
.
RF
50kΩ
50kΩ
.
VCMCD
RG
The drivers achieve better than -75 dB THD while
driving a 1MHz, 16Vp_p signal into a 60Ω load. The
amplifiers are enabled by forcing the ENAB/ENCD
pins to ground. Leaving the ENAB/ENCD pins floating
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 50kΩ resistors.
RF
–
.
VS-
VOUTD
D
+
VIND
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.