FEATURES
• 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/√Hz Input-Referred Voltage Noise
• Low 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: 40V PP (+12V, 60Ω
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
APPLICATIONS
• Ideal for All VDSL2 Profiles
• Backwards-Compatible with
ADSL/ADSL2+/ADSL2++ Systems

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.