The ISL58831 is a combination read + 3 write level laser driver and IV amplifier, with an extra read + oscillator ROM channel for use in dual-laser ‘Combo’ drivers. A separate (amplitude and frequency) oscillator modulates the selected output for laser noise reduction during read or write. All these functions are provided in a 24 Ld QFN package. The SEL1 pin, when high, selects the DVD (write) laser. Positive current supplied to the IIN lines, through a user-selected resistor, allow the full-scale range of each amplifier to be matched to the full-scale range of the users control DACs. When the write laser is selected, and the WEN pins are switched low, the respective current is summed to the output with 1ns rise and fall times. Write channel 2 has 240mA output capability with an 250X gain amplifier. The 100mAP-P (maximum) oscillator is switched on and off by the OSCEN line. The SEL1 line allows the oscillator to operate at different amplitudes and frequencies for each laser. The entire chip is powered down when ENABLE is low. The user can define the gain of the I/V amplifier. With a slew rate of 200V/μs, the I/V amplifier can normally settle to 1% within 30ns. An internal spread spectrum circuit modulates the oscillator frequency to help reduce peak EMI.


  • "Shrink-small" outline package
  • Voltage-controlled output current source requiring one external set resistor per channel
  • Current-controlled output current source
  • CH2 to 235mA maximum
  • CH3 to 170mA maximum
  • CH4 to 100mA maximum
  • Rise time = 0.8ns
  • Fall time = 0.8ns
  • On-chip oscillator with frequency and amplitude control by use of external resistors to ground
  • Oscillator to 600MHz
  • Oscillator to 100mAP-P
  • Single +5V supply (±10%)
  • Disable feature for power-up protection and power savings
  • 200V/μs I/V amplifier
  • Internal spread spectrum modulation to reduce peak EMI
  • Pb-free (RoHS compliant)


  • Combo CD-R + DVD-R
  • DVD±RW to 8X
  • Writable optical disk drives

Product Options

Part Number Part Status Pkg. Type Carrier Type MOQ Buy Sample
Active QFN Tube 90
Active QFN Reel 2500

Documentation & Downloads

Title language Type Format File Size Date
Datasheets & Errata
ISL58831 Datasheet Datasheet PDF 682 KB
PCN12084 - Manufacturing Site Change for the Listed Intersil Products - Carsem (CAS) Ipoh Malaysia Product Change Notice PDF 135 KB
PA14042 - Minimum Line Quantity Change Product Advisory PDF 363 KB