The MAX3982 is a single-channel, copper-cable preemphasis driver that operates from 1Gbps to 4.25Gbps. It provides compensation for copper links, such as 4.25Gbps Fibre Channel, allowing spans of up to 15m with 24AWG. The cable driver provides four selectable preemphasis levels. The input compensates for up to 10in of FR4 circuit board material at 4.25Gbps. The MAX3982 also features SFP-compliant loss-of-signal detection with selectable sensitivity and TX_DISABLE. Selectable output swing reduces EMI and power consumption. It is packaged in a 3mm x 3mm, 16-pin thin QFN and operates from 0°C to +85°C temperature range.
The MAX3982 is a single‑channel copper‑cable pre‑emphasis driver designed for SFP applications. It operates from 1 Gbps up to 4.25 Gbps and can drive up to 15 m of 24 AWG cable or compensate for up to 10 in of FR4 board material. The device offers four selectable pre‑emphasis levels, loss‑of‑signal detection with selectable sensitivity, and a TX_DISABLE pin for transmitter shutdown.
Key features include a 3 mm × 3 mm, 16‑pin thin QFN package, operating temperature range of 0 °C to +85 °C, typical supply voltage of 3.3 V, differential output swing of 40 mV‑P‑P (low) to 60 mV‑P‑P (high), and a maximum power dissipation of 1.35 W at 85 °C. The datasheet provides detailed electrical characteristics, pin descriptions, layout recommendations, and package drawings.
| Supply Voltage (VCC) range | -0.5 V to +6.0 V |
|---|---|
| Typical Supply Voltage | 3.0 V to 3.6 V |
| Operating Temperature Range | 0 °C to +85 °C |
| Data Rate | 1 Gbps to 4.25 Gbps |
| Package | 3 mm × 3 mm, 16‑pin thin QFN |
The MAX3982 operates from 0 °C up to +85 °C.
It supports data rates from 1 Gbps up to 4.25 Gbps.
The device can tolerate a supply voltage from –0.5 V to +6.0 V, with a typical operating range of 3.0 V to 3.6 V.
Four selectable pre‑emphasis levels are provided.