Texas Instruments THS6226

Description

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

Features

Digitally-Adjustable Quiescent Current:7.6mA to 23.0mA1.0mA Bias Current StepIndependent Voltage Boost and Main Line Driver DisableLow-Power Line Termination ModeFull Capacitor Recharge: 3msLow Input Voltage Noise Density:6.3 nV/√Hz Input-Referred Voltage NoiseLow MTPR Distortion:70dB with +19.8dBm G.993.2—Profile 8b–91dBc HD3 (1MHz, 60Ω Differential)High Output Current: (383mA into 60Ω)Wide Output Swing: 40VPP (+12V, 60Ω Differential Load with a 1:1.4 Transformer)Wide Bandwidth: 125MHzPort-to-Port Separation of 90dB at 1MHzPSRR: 70dB at 1MHz for Good Isolation

Typical applications

• Ideal for All VDSL2 Profiles
• Backwards-Compatible with ADSL/ADSL2+/ADSL2++ Systems

More information

• Datasheet
• IC product information