ADVANCED

SP8052

Rev 2.2 (12-04-03)

SP8052 – High Speed 12 Channel PDIC

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Vs

GND

GK

HL

EI

FJ

WPP1

WPP2

Gain

D

C

B

A

RF+

RF-

SP8052

16-Pin COB

FEATURES

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Dual wavelength 650 and 780nm

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Data channel bandwidth 140 MHz

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Three selectable gain settings

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Group delay error less than 1ns up to 86MHz

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500V/us Slew rate

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Small 16-pin COB 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 SP8052 is a twelve-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 twelve channels consist of four high speed channels (A, B, C,

and D), four slow channels (EI, FJ, GK, and HL), two fast channels (WPP1 and WPP2), and two

channels with paraphase output (RF+ and RF-). The slow channels output is the sum of signals

from two sensors of different sensor arrays (E – H and I – L). The WPP1 and WPP2 channels

output is sum of signals A + B and C + D sensors respectively, but at much lower gain (than at

A – D outputs) to prevent amplifier saturation in write mode. The RF channels output is sum of

A + B + C + D channels with identical weights. Low noise operation enables data recovery at

very low signal levels.

The SP8052 has a logic input for gain control that operate as a three-state logic input (Low, Mid,

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

The SP8052 is manufactured with an advanced 10GHz BICMOS technology.

High Speed 12-channel Photo Detector IC