OPA521 2.5A Narrowband Line Driver | TI.com


2.5A Narrowband Line Driver

2.5A Narrowband Line Driver - OPA521


The OPA521 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. This device supplies up to 2.5 A on high-current, low-impedance lines with reactive loads. With optimized internal protection structure, the OPA521 uses minimal external protection components that enable cost- and space-effective systems.

The OPA521 gives 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.

The OPA521 line driver operates with a single supply from 7 V to 24 V. At a typical load current (IOUT = 2.5 A, maximum), a wide output swing gives a 10-VPP capability with a nominal 24-V supply.

The device has protection against overtemperature and short-circuit conditions. Fault detection flags show current and thermal limits. A shutdown pin is available, which places the device into a low-power state that consumes 58 µA (typical).

The OPA521 is available in a surface-mount, 5-mm × 5-mm, 20-pin VQFN (RGW) package. The device operates over the extended industrial junction temperature range of –40°C to +125°C.


  • Supports:
    • CENELEC Bands A, B, C, D
    • ARIB STD-T84, FCC
    • FSK, SFSK, and NB-OFDM
  • Conforms To:
    • EN50065-1, -2, -3, -7
    • FCC, Part 15
    • ARIB STD-T84
  • Standards:
    • G3, PRIME, P1901.2, ITU-G.hnem
  • Line Driver With Integrated Thermal and Overcurrent Protection
  • Pin-Selectable Quiescent Current Consumption:
    • 58 µA in Standby Mode (Typical)
    • 51 mA for CENELEC Bands A, B, C, D (Typical)
    • 78 mA for FCC, ARIB STD-T84 (Typical)
  • Package: 5-mm × 5-mm 20-Pin VQFN
  • Operating Junction Temperature Range:
    TA = –40°C to +125°C

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Parametrics Compare all products in Precision Op Amps (Vos<1mV)

Number of Channels (#)
Total Supply Voltage (Min) (+5V=5, +/-5V=10)
Total Supply Voltage (Max) (+5V=5, +/-5V=10)
GBW (Typ) (MHz)
Slew Rate (Typ) (V/us)
Iq per channel (Typ) (mA)
Operating Temperature Range (C)
Package Group
Package Size: mm2:W x L (PKG)
Output Current (Typ) (mA)
-40 to 125    
20VQFN: 25 mm2: 5 x 5(VQFN)    
Adj Current Limit

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