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PDF ISL1591 Data sheet ( Hoja de datos )
| Número de pieza | ISL1591 | |
| Descripción | VDSL2 Line Driver | |
| Fabricantes | Intersil | |
| Logotipo |  |
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Fixed Gain, Dual Port, VDSL2 Line Driver
ISL1591
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.
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.
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.
High power push/pull line driver applications are best
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
>42.4VP-P swing to as low as 58Ω differential load. The four
amplifiers in ISL1591 are intended to be used as differential
pairs and not as individual amplifiers.
Features
• Internal Fixed Gain of 11.6V/V at RLOAD
• ±360mA Output Drive Capability
• 42.4VP-P Differential Output Drive into 82.6Ω
• -62dBc MBPR (VDSL 8b Profile)
• -65dBc US1, -63dBc US2 MBPR (VDSL2 17a Profile)
• -64dBc US1, -62dBc US2, -60dBc US3 MBPR (VDSL 30a
Profile)
• 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+
• VDSL2 Profiles: 8MHz, 17MHz, and 30MHz
Related Literature
• AN1325 “Choosing and Using Bypass Capacitors”
PART #
ISL1557
ISL1536
ISL1539A
TABLE 1. ALTERNATE SOLUTIONS
NOMINAL ±VCC
(V)
BANDWIDTH
(MHz)
APPLICATIONS
±6,+12
200
VDSL2
±12,+24
50
ADSL2+
±12,+24
240
VDSL2
+24V
AFE Vi VCM 1/2
ISL1591
Rb 1:N
Vo
100Ω
LINE
Rb
Rb
=
100Ω
N2
x 0.2
x
0.5
Vo
Vi
= 11.6 V V
FIGURE 1. FIXED GAIN LINE DRIVER CIRCUIT
10
0 PAR = 5.4
-10
20.2dBm
Avg. US1 MTBR = -65dBc
-20
-30
-40
-50
-60
-70
-80
-903.75M
4.15M
4.55M
4.95M
FREQUENCY (Hz)
FIGURE 2. MBPR VDSL2 8b PERFORMANCE
5.35M
October 31, 2012
FN7625.1
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.
1 page  
ISL1591
Electrical Specifications VS = +24V, RL= 82.6Ω differential, C0 = C1 = 0V, TA = +25°C. Amplifier pairs tested separately,
unless otherwise indicated. (Continued)
PARAMETER
DESCRIPTION
VIL Logic Low Voltage
IIH0 , IIH1
Logic High Current for C0, C1
IIL0, IIL1
Logic Low Current for C0, C1
SUPPLY CHARACTERISTICS
CONDITIONS
C0 and C1 inputs
C0 = 3.3V, C1 = 3.3V
C0 = 0V, C1 = 0V
MIN MAX
(Note 6) TYP (Note 6) UNIT
0.8 V
-7.5 1 +7.5 µA
-17 -13 -10 µA
Maximum Operating Supply
Voltage
+25.2
V
Minimum Operating Supply
Voltage
+14 V
IS+ (Full Power)
IS+ (Medium)
Positive Supply Current per Port
Positive Supply Current per Port
IS+ (Low)
Positive Supply Current per Port
IS+ (Power-down)
Positive Supply Current per Port
OUTPUT CHARACTERISTICS
All outputs at VCM, C0 = C1 = 0V, +VS = 24V
+VS = 14V
All outputs at VCM, C0 = 3.3V, C1 = 0V,
+VS = 24V
+VS = 14V
All outputs at VCM, C0 = 0V, C1 = 3.3V,
+VS = 24V
+VS = 14V
All outputs at VCM, C0 = C1 = 3.3V,
+VS = 24V
+VS = 14V
13
9.7
9.1
6.7
6.8
5.0
0.4
0.3
14
10.8
9.7
7.2
7.4
5.4
0.5
0.4
14.9
12
10.5
8.0
8.1
6.1
0.65
0.5
mA
mA
mA
mA
mA
mA
mA
mA
VOUT
IOL
IOUT
VOS-OUT
VOS-CM
Output Swing
RL-DIFF = No Load
Lightly Loaded Output Swing
RL-DIFF = 100Ω
Linear Output Current
RL = 25Ω, f = 100kHz, THD = -60dBc
Peak Output Current
VOUT = ±1V, RL = 1Ω
Differential Output Offset Voltage
Common Mode Output Offset
Voltage
+22
+20.2
-150
-50
+22.4
+21.2
±360
±600
25
-20
+150
+50
V
V
mA
mA
mV
mV
INPUT CHARACTERISTICS
CMIR
Common Mode Input Range at
each of the 4 Non-Inverting Input
Pins
+4.5
+19.5
V
CMRR
Common Mode Rejections for
VCM to Differential Mode Output (Input
each Port. VCM = +4.5V to +19.5V Referred), DC
VCM to Commonl Mode Output (Output
Referred), DC
66 dB
55 dB
PSRR
Power Supply Rejections for each +VS = +15V to +24V, GND = 0V, DC
Port to Differential Output (Input
Referred)
Power Supply Rejections for each +VS = +15V to +24V, GND = 0V, DC
Port to Common Mode Output
(Output Referred)
66 dB
58 dB
RIN Input Resistance Differential
6.0
NOTE:
6. Compliance to datasheet limits is assured by one or more methods: production test, characterization and/or design.
kΩ
5 FN7625.1
October 31, 2012
5 Page 
ISL1591
Typical Performance Curves VCC = +24V, Rb = 8.25Ω, GND at the Load = 11.6V/V (differential),
RLOAD = 82.5Ω, TA +25°C, C1 = 3.3V, C0 = 0V (50%power) unless otherwise noted.
6 30
24V 27
CL = 22pF
3 CL = 47pF
24
20V
CL = 1pF
0 21
12V 14V
18
CL = 5pF
-3 10V
15
-6100k
1M
10M
100M
FREQUENCY (Hz)
1G
FIGURE 33. SMALL SIGNAL BW vs SUPPLY VOLTAGE
12 100k
1M 10M
FREQUENCY (Hz)
100M
1G
FIGURE 34. SMALL SIGNAL FREQUENCY RESPONSE vs CLOAD
6
Rb = 8.25Ω with RLOAD = 82.5Ω
Rb = 5.1Ω with RLOAD = 51Ω
3
82.5Ω RLOAD
0
51Ω RLOAD
-3
-6 100k
1M
10M
100M
FREQUENCY (Hz)
1G
FIGURE 35. SMALL SIGNAL FREQUENCY RESPONSE vs RLOAD
10
0 PAR = 5.4
-10
20.2dBm
Avg. US1 MTBR = -65dBc
-20
-30
-40
-50
-60
-70
-80
-903.75M
4.15M
4.55M
FREQUENCY (Hz)
4.95M
FIGURE 36. VDSL2+ 8b PROFILE MTBR
5.35M
11 FN7625.1
October 31, 2012
11 Page | ||
| Páginas | Total 18 Páginas | |
| PDF Descargar | [ Datasheet ISL1591.PDF ] | |
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