THS6226

• Product Introduction

THS6226 is a dual-port, Class-H, current-feedback architecture, differential line driver amplifier system that is ideal for xDSL systems. The device is intended for use in VDSL2 (Ultra-High Rate Digital User Line 2) line driver systems that enable local DTM signals while supporting line power above +20.5dBm (at frequencies up to 8.5MHz) and optimal linearity to support the G.993.2 VDSL2 8b transmission mode. In addition, it has a high speed sufficient to support central office transmission with +14.5dBm line power (at frequencies up to 30MHz).

THS6226's unique architecture provides extremely low quiescent current while still achieving ultra-high linearity. At full bias conditions and at 1MHz, the differential distortion is -91dBc, while at 5MHz it drops to only -75dBc. For line lengths that do not require the full performance of the amplifier, the amplifier's multiple fixed bias setpoints improve energy savings. For greater flexibility and energy savings across all transmission modes, quiescent current can be digitally regulated (from 7.67mA to 23mA) with a 1.0mA bias current step. For systems that want to achieve more energy savings when not transmitting, THS6226 can be used in its line-end mode to keep impedance matched.

The wide output swing with a +12V supply combined with excellent current drive capability provides a wide headroom to suppress distortion at very low levels.

THS6226 is available in a QFN-32 PowerPAD package.

characteristic

• 数字式可调节静态电流： 7.6mA 至 23.0mA
• 1.0mA 偏置电流步进
• 独立的升压和主线路驱动器停用
• 低功耗线路终端模式
• 完整的电容器再充电： 3ms
• 低输出电压噪声密度： 6.3 nV/√Hz Input-Referred Voltage Noise
• 低 MTPR 失真： 70dB with +19.8dBm G.993.2—Profile 8b
• –91dBc HD3 (1MHz, 60Ω 差分负载）
• 高输出电流： （可向 60Ω 负载输送 383mA 的电流）
• 宽输出摆幅： 40V_PP （+12V，100Ω 差分负载和一个 1:1.4 变压器）
• 大带宽： 125MHz
• 端口至端口隔离度： 在 1MHz 频率下为 90dB
• 在 1MHz 频率下提供了 50dB 的 PSRR 以实现优良的隔离
• 应用
  • 非常适合于所有的 VDSL2 传输模式
  • 返回兼容 ADSL / ADSL2+ / ADSL2++ 系统

parameter