EL6263C

Features:

• Autozero of output offset to <10mV
• 3 selectable gains
• Space-saving QSOP-24 package
• Differential Sum & Sum-Bar outputs
• Single 5V supply



Application

• DVD RAM, RW, and ROM
• CD RW, R and ROM
• MO drives
• Optical Pickup pre-amplifier
• Servo positioning systems
• High speed instrumentation



Pinout




Description

   The EL6263C consists of four 30MHz trans-impedance amplifiers and four 70MHz trans-impedance amplifiers. The four 70MHz amplifier outputs also are averaged to provide differential 70MHz outputs.The EL6263C is designed to amplify the photodiode currents for CD, DVD, or other photodiode pick-up applications.

   Two TTL/CMOS-compatible select the gains for all eight amplifiers EL6263C. The gain settings for the fast amplifiers are 5.4kW, 10.7kW, and 28.6kW. The gain settings for the slow amplifiers are 13.3kW, 25kW, and 66.7kW. The gain settings for the sum and sumbar outputs are 7.6kW, 14.3kW, and 38.1kW measured single-ended. Gain matching is typically 3% channel to channel. The autozero input reduces each amplifier's output offset to less than 10mV when it goes high. The AZ pin is TTL/CMOS-compatible.

   The EL6263C E, F, G, and H channel bandwidths are 30MHz for all gains and reasonable input and output loads. The A, B, C, D, S, and S channels have bandwidths of 70MHz, 46MHz, and 40MHz at low, middle, and high gains respectively after driving 25cm of flex circuit.

   Each amplifier EL6263C output can typically sink or source up to 5mA and their outputs can swing 1VP-P at full bandwidth.

   The EL6263C operates from a single +5V supply and is available in QSOP-24 package. It is specified for operation from -0°C to 70°C.