ADVANCED

SP8057

Rev 0.3 (01-20-04)

SP8057 – High Speed 11-Channel PDIC

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Vs

GND

GK

HL

EI

FJ

SW1

SW2

WRF

D

C

B

A

RF+

RF-

SP8057

16-Pin

OPLGA

FEATURES

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Dual wavelength 650 and 780nm

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Data channel bandwidth 150 MHz

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Selectable gain settings

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Group delay error 1ns up to 86MHz

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250V/

µs Slew rate

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Small 16-pin OPLGA package

APPLICATION

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DVD-RAM with CD-RW capability

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DVD+/-RW with CD-RW capability

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Writable data storage optical devices

GENERAL DESCRIPTION

The SP8057 is an eleven-channel photo detector IC (PDIC) specially designed for high speed

DVD-RAM and DVD+/-RW applications and can operate at wavelengths of 650 and 780 nm.

The device contains three photo diode (sensor) arrays, with each having four sensors (A – D, E

– H, and I – L respectively). The eleven channels consist of four high speed channels (A, B, C,

and D), four slow channels (EI, FJ, GK, and HL), two fast channels with paraphase output (RF+

and RF-), and one additional WRF channel. The four slow channels output is the sum of signals

from two sensors of the same sensor array (E + I, F + J, G + K, and H + L). The WRF channels

output is four times the sum of A + B + C + D channels, while the output signal of paraphase

channels RF+ and RF- is only 0.5 of this sum. Low noise operation enables data recovery at

very low signal levels.

The SP8057 has two logic inputs for gain control that operate as three-state logic input (Low,

Mid, and High states). These states are used to select gain factors that affect all channels.

The SP8057 is manufactured with an advanced 10GHz BICMOS technology.

High Speed 11-channel Photo Detector IC