Differential broadband PLC and HPLC line driver with common-mode buffer

The THS6222 is a

differential line-driver amplifier with a current-feedback architecture manufactured

using Texas Instruments’ proprietary, high-speed, silicon-germanium (SiGe) process.

The device is targeted for use in broadband, high-speed, power line communications

(HPLC, IEEE 1901.1) line driver applications that require high linearity when

driving heavy line loads. The THS6222 supports PLC

standards including G3, PRIME, ISO 15118 (HPGP), G.hn and PRIME BPL. Common

modulation schema: OOK, FSK, OFDM.

The unique architecture of the THS6222 uses minimal quiescent current while achieving

very high linearity. The amplifier has an adjustable current pin (IADJ) that sets

the nominal current consumption along with the multiple bias modes that allow for

enhanced power savings where the full performance of the amplifier is not required.

Shutdown bias mode provides further power savings during receive mode in time

division multiplexed (TDM) systems while maintaining high output impedance. The

integrated midsupply common-mode buffer eliminates external components, reducing

system cost and board space.

The wide output swing of 57VPP (100Ω load) with 32V power supplies, coupled with over 650mA of current drive (25Ω load), allows for wide dynamic range that keeps distortion minimal.

The THS6222 is available in 16-pin and 24-pin VQFN packages

with exposed thermal pad, and is specified for operation from –40°C to +85°C.