ISL1539A [INTERSIL]
Dual Port VDSL2 Line Driver; 双端口VDSL2线路驱动器
| 型号： | ISL1539A |
| 厂家： | 
Intersil |
| 描述： | Dual Port VDSL2 Line Driver |
| 文件： | 总2页 (文件大小：86K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Get Full Datasheet
Dual Port VDSL2 Line Driver
ISL1539A
Features
• 360mA Output Drive Capability
The ISL1539A provides 4 internal wideband op amps
intended to be used as two pairs of differential line
drivers. The ISL1539A’s high bandwidth, 240MHz, and
• 41.8V
Differential Output Drive into 100Ω
P-P
• -89dBc THD @ 1MHz 2V
P-P
ultra low distortion, -89dBc @ 1MHz, 2V , support the
P-P
• -65dBc MTPR (VDSL 8b Profile)
demanding MTPR requirements of emerging VDSL2 line
driver designs. Less demanding requirements can be met
at very low quiescent powers using the supply current
adjustment features.
• High Slew Rate of 3000V/µs Differential
• Bandwidth (240MHz @ A
V-DIFF
• Supply Current Control Pins
• Port Separation
- 78dB @ 500kHz
- 70dB @ 1MHz
- 60dB @ 4MHz
= 10)
Each of the 4 internal op amps is a wideband current
feedback amplifier offering very high slew rate intrinsic to
that design using low quiescent current levels. Each of
the two pair of amplifiers (ports) can also be power
optimized to the application using two external quiescent
control logic pins. Full power is nominally 27.2mA/port
with options of medium power cutback to 23mA/port, a
low power condition at 13.5mA/port, and an off state at
<0.5mA/port. Added quiescent power flexibility is
• Pb-Free (RoHS Compliant)
Applications*(see page 21)
• 8MHz and 17MHz VDSL2 Profiles
• ADSL2+
provided through an external I
pin. Grounding the pin
ADJ
gives the nominal currents listed above while inserting a
resistor from this pin to ground can be used to scale each
of the settings downward.
Related Literature (see Device Info page)
• AN1325 “Choosing and Using Bypass Capacitors”
High power push/pull line driver applications as
illustrated in the example below are best supported using
a low headroom, high output current device. On ±12V
supplies, the ISL1539A offers a 1.1V headroom with
>360mA peak output current. Driving differentially this
• TB426 “Characterization of the Output Protection
Circuitry of the EL1528 DSL Driver for Lightning
Surges”
TABLE 1. ALTERNATE SOLUTIONS
gives >41.8V
swing to as low as 58Ω differential load.
P-P
High SFDR operation is also supported for supplies as low
as ±7.5V. Intended to be used as differential pairs, this
two port device includes special circuitry to minimize
common mode loop peaking while also reducing the
common mode output noise spectrum. That circuitry
links the two sides of each port, precluding their
application as individual amplifiers.
NOMINAL ±V
(V)
BANDWIDTH
(MHz)
CC
PART #
ISL1557
ISL1534
ISL1536
APPLICATIONS
VDSL
±6
200
40
±12
±12
ADSL2+
50
ADSL2+
Typical Application
4MHz Harmonic Distortion
+12V
V
= ±12V
S
+
AV = +10
¼
Ro
Rb
ISL1539A
R
R
= 3.2kΩ
F
L
-
= 100Ω DIFF
Rf
1:n
Ω
3.2k
Ω
VI
VO
Rg711
LOAD
SOURCE
3rd HD
THD
Rf
2nd HD
3.2kΩ
-
¼
ISL1539A
+
Ro
AV-DIFF = VO/VI = 10V/V
Rb
-12V
TYPICAL DIFFERENTIAL I/O LINE DRIVER
(1 OF 2 PORTS)
September 23, 2009
FN6916.0
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-468-3774 | Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright © Intersil Americas Inc. 2009. All Rights Reserved.
1
All other trademarks mentioned are the property of their respective owners.
ISL1539A
For additional products, see www.intersil.com/product_tree
Intersil products are manufactured, assembled and tested utilizing ISO9000 quality systems as noted
in the quality certifications found at www.intersil.com/design/quality
Intersil products are sold by description only. Intersil Corporation reserves the right to make changes in circuit design, software and/or specifications
at any time without notice. Accordingly, the reader is cautioned to verify that data sheets are current before placing orders. Information furnished by
Intersil is believed to be accurate and reliable. However, no responsibility is assumed by Intersil or its subsidiaries for its use; nor for any
infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any
patent or patent rights of Intersil or its subsidiaries.
For information regarding Intersil Corporation and its products, see www.intersil.com
FN6916.0
September 23, 2009
2
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