The ISL1539 is to be used for high performance long reachand high speed applications, including ADSL2, ADSL2+, andVDSL2 20dBm.The ISL1539 is an integral part of the signal chain. Thedriver has been optimized for flat gain response and reducedharmonic distortion and noise in the bands of interest toimprove the overall signal to noise in the system.These drivers achieve a total harmonic distortion (THD)measurement of typically -60dB MTPR @ 1.1MHz, whileconsuming typically 10mA per DSL channel of total supplycurrent. This supply current can be set using a resistor onthe IADJ pin. Two other pins (C0 and C1) can also be used toadjust supply current to one of four pre-set modes (full-IS,3/4-IS, 1/2-IS, and full power-down). The ISL1539 operateson ±5V to ±15V supplies and retains its bandwidth andlinearity over the complete supply range.The device is supplied in the small footprint (4mmx5mm)24 Ld QFN package and is specified for operation over the full-40°C to +85°C temperature range.