ADSL Driver Dual 32-Pin VQFN EP T/R

The THS6226 is a dual-port, class H, current-feedback architecture, differential line driver amplifier system ideal for xDSL systems. The device is targeted for use in very-high-bit-rate digital subscriber line 2 (VDSL2) line driver systems that enable native DTM signals while supporting greater than +20.5dBm line power (up to 8.5MHz) with good linearity, supporting the G.993.2 VDSL2 8b profile. It is also fast enough to support central-office transmission of +14.5dBm line power up to 30MHz. The unique architecture of the THS6226 allows quiescent current to be minimal while still achieving very high linearity. Differential distortion, under full bias conditions, is –91dBc at 1MHz and reduces to only –75dBc at 5MHz. Fixed multiple bias settings of the amplifiers offer enhanced power savings for line lengths where the full performance of the amplifier is not required. To allow for even more flexibility and power savings on all profiles, quiescent current is digitally adjustable from 7.6mA to 23mA with a bias current step of 1.0mA. For systems where additional power savings while not transmitting are desired, the THS6226 can be used in its line termination mode to maintain impedance matching. The wide output swing on +12V power supplies, coupled with excellent current drive, allows for wide dynamic headroom, keeping distortion minimal. The THS6226 is available in a QFN-32 PowerPAD package.

Digitally-Adjustable Quiescent Current:
7.6mA to 23.0mA

1.0mA Bias Current Step

Independent Voltage Boost and Main Line Driver Disable

Low-Power Line Termination Mode

Full Capacitor Recharge: 3ms

Low Input Voltage Noise Density:
6.3 nV/vHz Input-Referred Voltage Noise

Low MTPR Distortion:
70dB with +19.8dBm G.993.2—Profile 8b

–91dBc HD3 (1MHz, 60O Differential)

High Output Current: (383mA into 60O)

Wide Output Swing: 40V_PP (+12V, 60O Differential Load with a 1:1.4 Transformer)

Wide Bandwidth: 125MHz

Port-to-Port Separation of 90dB at 1MHz

PSRR: 70dB at 1MHz for Good Isolation

Ideal for All VDSL2 Profiles

Backwards-Compatible with ADSL/ADSL2+/ADSL2++ Systems