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ISL1591IRTZ-T13

更新时间： 2024-10-03 00:54:31
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英特矽尔 - INTERSIL /
页数 文件大小 规格书
18页 938K
描述
Fixed Gain, Dual Port, VDSL2 Line Driver

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ISL1591IRTZ-T13 数据手册

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Fixed Gain, Dual Port, VDSL2 Line Driver  
ISL1591  
Features  
The ISL1591 provides 4 internal wideband op amps intended  
to be used as two pairs of fixed gain differential line drivers.  
The ISL1591’s high bandwidth, and ultra low distortion  
enables the support of VDSL2 8b, 17a, and 30a in central  
office modem applications. This highly versatile line driver  
allows for operation from +14V to +24V nominal power  
supplies, while delivering exceptional MTPR distortion  
performance.  
• Internal Fixed Gain of 11.6V/V at R  
LOAD  
• ±360mA Output Drive Capability  
• 42.4V  
Differential Output Drive into 82.6Ω  
P-P  
• -62dBc MBPR (VDSL 8b Profile)  
• -65dBc US1, -63dBc US2 MBPR (VDSL2 17a Profile)  
• -64dBc US1, -62dBc US2, -60dBc US3 MBPR (VDSL 30a  
Profile)  
Using a single +24V supply, the ISL1591 MBPR distortion is  
below -62dBc in VDSL2 8b, -63dBc in VDSL2 17a, and -60dBc  
in VDSL2 30a profiles. Using a single +14V supply, ISL1591  
supports 14.5dBm VDSL2 17a and 30a profiles at only a  
power consumption of 425mW. This capability is ideal for  
short loop, high bit rate VDSL2 applications where 14.5dBm  
transmit power is all that is required. For full power VDSL2 8b  
profile with 20dBm of transmit power, the line driver will  
require +24V single supply.  
• High Slew Rate of 2000V/µs Differential  
• Bandwidth (170MHz)  
• Supply Current Control Pins  
• K.20, GR-1089 Surge Robustness Validated  
• Pb-Free (RoHS Compliant)  
Applications  
• ADSL2+  
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 14mA/port with options of medium power  
cutback to 9.7mA/port, a low power condition at 7.4mA/port,  
and an off state at <0.5mA/port.  
• VDSL2 Profiles: 8MHz, 17MHz, and 30MHz  
Related Literature  
• AN1325 “Choosing and Using Bypass Capacitors”  
TABLE 1. ALTERNATE SOLUTIONS  
NOMINAL ±V  
(V)  
BANDWIDTH  
(MHz)  
CC  
High power push/pull line driver applications are best  
PART #  
ISL1557  
ISL1536  
ISL1539A  
APPLICATIONS  
VDSL2  
supported using a low headroom, high output current device.  
On +24V supplies, the ISL1591 offers a 1.6V headroom with  
>360mA peak output current. Driving differentially, this gives  
±6,+12  
±12,+24  
±12,+24  
200  
50  
ADSL2+  
>42.4V  
swing to as low as 58Ω differential load. The four  
240  
VDSL2  
P-P  
amplifiers in ISL1591 are intended to be used as differential  
pairs and not as individual amplifiers.  
10  
0
+24V  
PAR = 5.4  
20.2dBm  
-10  
-20  
-30  
-40  
-50  
-60  
-70  
-80  
Avg. US1 MTBR = -65dBc  
Rb  
1:N  
VCM 1/2  
ISL1591  
AFE  
Vi  
100Ω  
LINE  
Vo  
Rb  
Ω
100  
N2  
Rb  
=
x 0.2 x 0.5  
V
Vo  
Vi  
V
= 11.6  
-90  
3.75M  
4.15M  
4.55M  
FREQUENCY (Hz)  
4.95M  
5.35M  
FIGURE 1. FIXED GAIN LINE DRIVER CIRCUIT  
FIGURE 2. MBPR VDSL2 8b PERFORMANCE  
October 31, 2012  
FN7625.1  
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.  
1-888-INTERSIL or 1-888-468-3774 |Copyright Intersil Americas Inc. 2011, 2012. All Rights Reserved  
Intersil (and design) is a trademark owned by Intersil Corporation or one of its subsidiaries.  
All other trademarks mentioned are the property of their respective owners.  
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