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PDF ( 数据手册 , 数据表 ) ISL1571

零件编号 ISL1571
描述 Power Line Communication
制造商 Intersil
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ISL1571 数据手册, 描述, 功能
Data Sheet
September 3, 2009
ISL1571
FN6387.1
Power Line Communication (PLC)
The ISL1571 is a dual operational amplifier designed for
PLC line driving in OFDM and SSC based solutions. This
device features a high drive capability of 750mA while
consuming only 6mA of supply current per amplifier and
operating from a single 4.5V to 12V supply. The driver
achieves a typical distortion of -80dBc, at 150kHz into a 25Ω
load.
The ISL1571 is available in the thermally-enhanced
16 Ld QFN or 10 Ld HMSOP package and is specified for
operation over the full -40°C to +85°C temperature range. The
ISL1571 has control pins BIAS0 and BIAS1 for controlling the
bias and enable/disable of the outputs. These controls allow
for lowering the power to fit the performance/power ratio for
the application.
The ISL1571 is ideal for line driving applications following
the Homeplug 1.0, Homeplug AV and UPA standard based
PLC.
Features
• 21dBm output power capability
• Drives up to 750mA from a +12V supply
• 20VP-P differential output drive into 21Ω
• Very low noise floor
• -75dBc typical driver output distortion at 4MHz
• -80dBc typical driver output distortion at 10MHz
• -79dBc typical driver output distortion at 17MHz
• Low quiescent current of 6mA per amplifier
• Supply range
- For ISL1571IUEZ 4.5V to 12V
- For ISL1571IRZ ±2.25V to ±6V, 4.5V to 12V
• 250MHz bandwidth
• Thermal shutdown
• Pb-free (RoHS compliant)
Applications
Ordering Information
• Homeplug 1.0
• Homeplug AV
• UPA digital home standard
PART NUMBER
(Note)
PART
MARKING
TEMP. RANGE
(°C)
PACKAGE
(Pb-Free)
PKG.
DWG. #
ISL1571IRZ
157 1IRZ
-40 to +85
16 Ld QFN
MDP0046
ISL1571IRZ-T7*
157 1IRZ
-40 to +85
16 Ld QFN (Tape and Reel)
MDP0046
ISL1571IUEZ
BBBDA
-40 to +85
10 Ld HMSOP
MDP0050
ISL1571IUEZ-T7*
BBBDA
-40 to +85
10 Ld HMSOP (Tape and Reel) MDP0050
*Please refer to TB347 for details on reel specifications
NOTE: These Intersil Pb-free plastic packaged products employ special Pb-free material sets, molding compounds/die attach materials, and 100%
matte tin plate plus anneal (e3 termination finish, which is RoHS compliant and compatible with both SnPb and Pb-free soldering operations).
Intersil Pb-free products are MSL classified at Pb-free peak reflow temperatures that meet or exceed the Pb-free requirements of IPC/JEDEC J
STD-020.
1 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. 2008, 2009. All Rights Reserved.
All other trademarks mentioned are the property of their respective owners.







ISL1571 pdf, 数据表
ISL1571
should be avoided because of their parasitic inductance.
Similarly, capacitors should be low inductance for best
performance.
Capacitance at the Inverting Input
Due to the topology of the current feedback amplifier, stray
capacitance at the inverting input will affect the AC and
transient performance of the ISL1571 when operating in the
non-inverting configuration.
In the inverting gain mode, added capacitance at the
inverting input has little effect since this point is at a virtual
ground and stray capacitance is therefore not “seen” by the
amplifier.
Feedback Resistor Values
The ISL1571 has been designed and specified with
RF = 750Ω for AV = +5. This value of feedback resistor yields
extremely flat frequency response with 1dB peaking out to
250MHz. As is the case with all current feedback amplifiers,
wider bandwidth, at the expense of slight peaking, can be
obtained by reducing the value of the feedback resistor.
Inversely, larger values of feedback resistor will cause rolloff
to occur at a lower frequency. See the curves in the “Typical
Performance Curves” section, beginning on page 4, which
show 3dB bandwidth and peaking vs frequency for various
feedback resistors and various supply voltages.
Bandwidth vs Temperature
Whereas many amplifier's supply current and consequently
3dB bandwidth drop off at high temperature, the ISL1571
was designed to have little supply current variations with
temperature. An immediate benefit is the 3dB bandwidth
does not drop off drastically with temperature.
Supply Voltage Range
The ISL1571IRZ has been designed to operate with supply
voltages from ±2.25V to ±6V nominal. Optimum bandwidth,
slew rate, and video characteristics are obtained at higher
supply voltages.
Single Supply Operation
If a single supply is desired, values from +4.5V to +12V
nominal can be used as long as the input common mode
range is not exceeded. When using a single supply, be sure
to either:
1. DC bias the inputs at an appropriate common mode
voltage and AC couple the signal, or:
2. Ensure the driving signal is within the common mode
range of the ISL1571. ISL1571IUEZ must be used in
single supply applications.
PLC Modem Applications
The ISL1571 is designed as a line driver for PLC modems. It
is capable of outputting 450mA of output current with a
typical supply voltage headroom of 1.3V. It can achieve
-85dBc of distortion at low 7.1mA of supply current per
amplifier.
The average line power requirement for the PLC application
is 13dBm (20mW) into a 100Ω line. The average line voltage
is 1.41VRMS. Using a differential drive configuration and
transformer coupling with standard back termination, a
transformer ratio of 1:2 is selected. The circuit configuration
is shown in Figure 23.
AFE
+
-
750
250Ω
+
-
750
12.5
TX1
1:2
12.5
100
FIGURE 23. CIRCUIT CONFIGURATION
8 FN6387.1
September 3, 2009














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