OPA521 Narrowband Line Drivers

Texas Instruments' OPA521 series is a line driver, power amplifier that aligns with the power-line communications (PLC) conducted emissions requirements in CENELEC bands A, B, C, and D, and ARIB STD-T84 and FCC part 15. These devices supply up to 2.5 A on high-current, low-impedance lines with reactive loads. They use minimal external protection components that enable cost- and space-effective systems thanks to their optimized internal protection structure.

The OPA521 offers a closed-loop gain of -7 V/V with 3.8 MHz of bandwidth. The monolithic integrated circuit gives high reliability in power-line communication applications. These line drivers operate with a single supply from 7 V to 24 V. At a typical load current (I_OUT = 2.5 A, maximum), a wide output swing gives a 10 V_PP capability with a nominal 24 V supply.

These devices have protection against overtemperature and short-circuit conditions. The current and thermal limits are indicated by fault detection flags. An available shutdown pin places the device into a low-power state that consumes 58 A (typical). The OPA521 is available in a surface-mount, 5 mm × 5 mm, 20-pin VQFN (RGW) package. They operate over an extended industrial junction temperature range of -40°C to +125°C.