The AD8398 is a VDSL dual line driver with shutdown. It features wide output swing, high output current, low distortion and high speed. AD8398 can be used for VDSL line drivers, consumer xDSL modems and twisted pair line drivers etc.
The AD8398 is a high‑speed current‑feedback operational amplifier designed for VDSL and VDSL2 line‑driver applications. It offers high output current, wide bandwidth, and fast slew rate, making it suitable for consumer xDSL modems and twisted‑pair line drivers.
Key specifications include a linear output current of 250 mA peak, up to 20 V p‑p differential output swing, 200 MHz bandwidth, 900 V/µs slew rate, and operation over an industrial temperature range of –40 °C to +85 °C. The device is supplied in a thermally enhanced 4 mm × 4 mm, 16‑lead LFCSP package and features power‑management pins for selectable power modes.
| Output swing (50 Ω load) | 18.8 V p‑p differential from 12 V supply |
|---|---|
| Output swing (100 Ω load) | 20.0 V p‑p differential from 12 V supply |
| Peak output current | 250 mA |
| Quiescent current (normal mode) | 15 mA total |
| Quiescent current (power‑down mode) | 1.2 mA |
| Bandwidth | 200 MHz (≈+2 dB, –3 dB) |
| Slew rate | 900 V/µs |
| Operating temperature range | –40 °C to +85 °C |
| Package | Thermally enhanced 4 mm × 4 mm, 16‑lead LFCSP |
The AD8398 provides a linear output current of 250 mA peak.
In power‑down mode the quiescent current drops to 1.2 mA.
The device has a 200 MHz bandwidth (≈+2 dB, –3 dB).
It operates from –40 °C to +85 °C.