The ISL1539 is a dual channel differential VDSL2 line driver used for high performance long reach and high-speed applications. The driver has been optimized for flat gain response, reduced harmonic distortion, and noise to improve the overall signal to noise ratio in the system. The drivers achieve a total harmonic distortion (THD) measurement of typically -60dB MTPR @ 1.1MHz, while consuming typically 10mA per DSL channel of total supply current. The device operates on ±5V to ±15V supplies and retains its bandwidth and linearity over the complete supply range. It is supplied in a small footprint (4mmx5mm) 24 Ld QFN package and is specified for operation over the full -40°C to +85°C temperature range.
The ISL1539 is a dual‑channel differential VDSL2 line driver designed for high‑performance long‑reach ADSL2/ADSL2+/VDSL2 applications. It offers flat gain response, low harmonic distortion and configurable supply current settings.
The document provides detailed electrical specifications, absolute maximum ratings, pin descriptions, ordering information and typical performance curves for both QFN and HTSSOP package families.
| Output drive capability | 450 mA |
|---|---|
| Differential output voltage | 44.1 Vp‑p into 100 Ω |
| Total harmonic distortion (THD) @ 1 MHz | -85 dBc |
| Bandwidth | 80 MHz @ Ay = 10 |
| Channel separation | 80 dB @ 500 kHz |
| Operating temperature range | -40 °C to +85 °C |
| Package size (QFN) | 4 mm × 5 mm, 24‑lead QFN |
The driver can deliver up to 450 mA of output drive current.
The ISL1539 achieves a THD of –85 dBc at 1 MHz.
The device is rated for –40 °C to +85 °C operation.