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ISL1550 Datasheet(PDF) 1 Page - Intersil Corporation |
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ISL1550 Datasheet(HTML) 1 Page - Intersil Corporation |
1 / 13 page 1 Single Port, VDSL2 Differential Line Driver ISL1550 The ISL1550 is a dual operational amplifier intended to be used as a differential line driver. ISL1550’s high bandwidth and low distortion performance enables the support of VDSL2 8b, 17a and 30a modem applications. This device features a high current drive capability of ±750mA required to drive large voltage peaks into heavy loads. In Central Office (CO) applications, the driver achieves a typical Missing Band Power Ratio (MBPR) of -66dBc in VDSL2 8b upstream (US) 1 band and MBPR’s of -61dBc and -60dBc in VDSL2 17a US1 and US2 respectively. The ISL1550 has two bias current control pins (C0, C1) to allow for four power settings (disable, low, medium, high). The VDSL modem DSP configures the line driver’s power setting based on the desired mode of operation. The line driver operates on a nominal single +12V or a dual ±6V supplies with bias current in active mode between 15mA to 32mA, depending on its power setting. The ISL1550’s gain setting is configurable at the application level by setting the Rf and Rg resistor values. The surge current handling of ISL1550 has been enhanced to allow ITU-T K.20 and GR1089 compliance with minimal external surge protection circuitry. The ISL1550 is available in the thermally-enhanced, Pb-free RoHS compliant 16 Ld QFN package and is specified for operation over the full -40°C to +85°C temperature range. Features • 20dBm output power capability • Drives up to ±750mA from a +12V supply •18VP-P differential output drive into 20Ω • -89dBc typical driver output distortion at full output at 200kHz, 12VP-P differential • -61dBc US1, -60dBc US2 avg. MBPR 17a • Supply range: ±4.0V to ±6.6V, +8.0V to +13.2V •Thermal shutdown • K.20, GR-1089 Surge Robustness Validated Applications • VDSL2 Profiles: 8MHz, 17MHz, and 30MHz Related Literature • AN1325 “Choosing and Using Bypass Capacitors” TABLE 1. ALTERNATE SOLUTIONS PART # NOMINAL ±VCC (V) BANDWIDTH (MHz) APPLICATIONS ISL1557 ±6,+12 200 VDSL2 ISL1539A ±12,+24 240 VDSL2 FIGURE 1. TYPICAL APPLICATION CIRCUIT FIGURE 2. US2 MBPR 17a VDSL2 PERFORMANCE 2.2 750 +6V + - AFE 750 + - 1.5k ½ ISL1550 ½ ISL1550 2.2 100 NOMINAL LINE 1:2.5 1k 1k 2.2n -6V 500 500 100n 100n SUPPLY DECOUPLING NOT SHOWN Rf Rf Rg -140 -130 -120 -110 -100 -90 -80 -70 -60 -50 -40 8.40M 8.90M 9.40M 9.90M 10.4M 10.9M 11.4M 11.9M FREQUENCY (Hz) March 16, 2012 FN6795.0 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. 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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