MAX9483/MAX9484 are high performance, multi-mode laser diode drivers (LDDs) designed for CD and DVD combo pick-up heads. The driver features three input channels, an RF oscillator, and two precision current amplifier outputs for driving CD and DVD lasers. By selecting the write control signal and input currents on the input channels, the MAX9483/MAX9484 can support multiple CD and DVD read/write standards such as CD-R/RW, DVD-R, DVD+R, DVD-RW, DVD+RW, and DVD-RAM. Peak total output current is 400mA and each channel has a current gain of 100. Oscillator frequency and output amplitude are set using external resistors. The MAX9484 also adds an external resistor pin that allows the oscillation frequency of the two outputs to be set independently. In addition, the MAX9484 is capable of accepting a write control signal in either low voltage differential signaling (LVDS) mode or single-ended mode for reliable high-speed write operations.
The MAX9483 and MAX9484 are controller ICs for CD‑R/W and DVD optical drives supporting formats such as CD‑R/RW, DVD‑R, DVD+R, DVD‑RW, DVD+RW and DVD‑RAM. They operate from a 4.5 V to 5.5 V supply and function over a temperature range of 0 °C to +70 °C. The MAX9483 is offered in a 16‑lead QSOP or 4 mm × 4 mm Thin QFN package, while the MAX9484 uses a 20‑lead Thin QFN and adds LVDS support.
The datasheet provides absolute maximum ratings, DC and AC electrical characteristics, oscillator specifications, pin configurations, and package outlines. Key performance figures include a typical oscillator frequency of 255 MHz to 350 MHz, write rise/fall times of 0.9 ns to 1.6 ns, and a maximum output current of 320 mA to 400 mA per channel.
| Supply Voltage (VCC) | 4.5 V to 5.5 V |
|---|---|
| Operating Temperature Range | 0 °C to +70 °C |
| Maximum Output Current per Channel | 320 mA to 400 mA |
| LVDS Interface | Supported on MAX9484 |
The MAX9483 operates from 4.5 V to 5.5 V.
Each output channel can source up to 320 mA and up to 400 mA under typical conditions.