Wideband, Differential, High Output Current Line Driver with Shutdown

The ADA4312-1 is a high speed, differential, current feedback line driver designed for half-duplex G.hn power line communication (PLC) modems. The high output current, high bandwidth, and slew rate of 2100 V/μs make the ADA4312-1 an excellent choice for G.hn broadband applications that require high linearity while driving low impedance loads.

The CMOS-compatible shutdown control pin (SD) reduces the quiescent current to 3 mA while maintaining an output impedance of 10 kΩ differential. The ADA4312-1 also provides resistor adjustable quiescent current for improved efficiency in transmit mode.

The ADA4312-1 is available in a thermally enhanced, 16-lead LFCSP with an exposed pad to facilitate robust thermal management. The ADA4312-1 is rated to operate over the extended industrial temperature range of −40°C to +85°C.

Applications

* ITU G.hn (ITU G.9960/G.9961)

* HomePlug AV

* HomePlug AV2

* IEEE 1901

* High speed

* −3 dB bandwidth: 195 MHz, GDIFF = +16 V/V, RL, DIFF = 40 Ω

* Differential slew rate: 2100 V/μs

* Wide output swing: 18.0 V p-p differential, 12 V supply

* High output current: 225 mA peak

* G.hn MTPR at 16 dBm line power

* −64 dBc typical at 5 MHz, referred to −58 dBm/Hz

* −64 dBc typical at 17 MHz, referred to −58 dBm/Hz

* −64 dBc typical at 28 MHz, referred to −58 dBm/Hz

* −63 dBc typical at 31 MHz, referred to −58 dBm/Hz

* −61 dBc typical at 59 MHz, referred to −58 dBm/Hz

* −62 dBc typical at 82 MHz, referred to −58 dBm/Hz

* Shutdown

* CMOS-compatible SD pin

* Shutdown quiescent current: 3 mA

* ZOUT in shutdown: 10 kΩ differential (open-loop)

* Resistor adjustable quiescent current