SP8057

ADVANCED SP8057 High Speed 11-channel Photo Detector IC FEATURES • • • • • • Dual wavelength 650 and 780nm Data channel bandwidth 150 MHz Selectable gain settings Group delay error 1ns up to 86MHz 250V/µs Slew rate Small 16-pin OPLGA package Vs GND GK HL EI FJ SW1 SW2 1 2 3 4 5 6 7 8 SP8057 16-Pin OPLGA 16 15 14 13 12 11 10 9 VCC WRF D C B A RF+ RF- APPLICATION • • • DVD-RAM with CD-RW capability DVD+/-RW with CD-RW capability 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. Rev 0.3 (01-20-04) SP8057 – High Speed 11-Channel PDIC SIPEX RESERVES THE RIGHT TO MAKE CHANGES TO THIS DATASHEET. CALL FOR UPDATES: 1-978-667-8700. SIPEX CONFIDENTIAL, ADVANCED & PROPRIETARY. DO NOT DISTRIBUTE OR COPY page 1 of 4 ADVANCED PIN ASSIGNMENTS Pin # 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Pin Name Vs GND GK HL EI FJ SW1 SW2 RFRF+ A B C D WRF VCC SP8057 Pin Function Reference voltage. Bypass to GND with ceramic capacitor 0.1uF Ground pin Output of GK channel (sum of G + K sensor signals) Output of HL channel (sum of H + L sensor signals) Output of EI channel (sum of E + I sensor signals) Output of FJ channel (sum of F + J sensor signals) Logic input of Gain Controller. Allows three states – low, high, and middle - Z Logic input of Gain Controller. Allows three states – low, high, and middle - Z Output of RF- channel. RF- = - 0.5 x (A + B +C + D) Output of RF+ channel. RF+ = 0.5 x (A + B + C + D) Output of A channel Output of B channel Output of C channel Output of D channel Output of WRF channel. WRF = 4 x (A + B + C + D) Supply voltage. Bypass to GND with ceramic capacitor 0.1uF BOARD LAYOUT AND GROUNDING To obtain the best performance from the SP8057, a printed circuit board with ground plane is required. High quality, low series resistance ceramic 0.1uF bypass capacitors should be used at the Vcc and Vs pins (pins 1 and 16). These capacitors must be located as close to the pins as possible. The traces connecting the pins and the bypassing capacitors must be kept short and should be made as wide as possible. Rev 0.3 (01-20-04) SP8057 – High Speed 11-Channel PDIC SIPEX RESERVES THE RIGHT TO MAKE CHANGES TO THIS DATASHEET. CALL FOR UPDATES: 1-978-667-8700. SIPEX CONFIDENTIAL, ADVANCED & PROPRIETARY. DO NOT DISTRIBUTE OR COPY page 2 of 4 ADVANCED OPLGA 16 PACKAGE DIMENSIONS SP8057 Rev 0.3 (01-20-04) SP8057 – High Speed 11-Channel PDIC SIPEX RESERVES THE RIGHT TO MAKE CHANGES TO THIS DATASHEET. CALL FOR UPDATES: 1-978-667-8700. SIPEX CONFIDENTIAL, ADVANCED & PROPRIETARY. DO NOT DISTRIBUTE OR COPY page 3 of 4 ADVANCED ORDERING INFORMATION Part number SP8057DG Temperature range -30 + 800C SP8057 Package Type 16-pin OPLGA Rev 0.3 (01-20-04) SP8057 – High Speed 11-Channel PDIC SIPEX RESERVES THE RIGHT TO MAKE CHANGES TO THIS DATASHEET. CALL FOR UPDATES: 1-978-667-8700. SIPEX CONFIDENTIAL, ADVANCED & PROPRIETARY. DO NOT DISTRIBUTE OR COPY page 4 of 4