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| ADVANCED SP8027 High Speed, Constant Bandwidth Differential APC Amplifier FEATURES * * * * * * * * Dual wavelength 650 and 780nm 150 MHz Bandwidth over all gains 400 V/s Slew Rate VCC 5 ns Setting Time GAIN 10 mV Differential Output Offset Voltage Potentiometer, Voltage or DAC programmable gain VBG 6 dB External Gain Adjust GND Small 8-pin OPLGA package 1 2 3 4 SP8027 8-Pin OPLGA 8 7 6 5 VOUT+ VOUTVG2 VG1 APPLICATION * * CD-R, and CD-RW DVD+/-R, DVD+/-RW, and DVD-RAM GENERAL DESCRIPTION The SP8027 represents the next generation in Automatic Power Control (APC) amplifiers designed specifically for demanding pick-up head applications. Whereas typical APC products exhibit degradation of bandwidth and slower settling times at higher gain levels, the SP8027 features constant bandwidth (150MHz) and fast settling times (5ns) across the entire gain adjust range. With its integrated photo detector, the SP8027 monitors light intensity of the laser diode in CD-R, CD-RW, DVD+/-R, DVD+/-RW, and DVD-RAM assemblies and converts this light to an output voltage. The magnitude of this voltage signal corresponds to the laser power intensity and is subsequently fed back to the laser diode driver to control the laser output power. The SP8027 on-chip photo detector transforms incident laser light into a proportional current, which is then converted to a voltage through a trans-impedance amplifier. The SP8027 achieves an unparalleled level of performance by combining excellent DC stability and low noise with outstanding AC performance. The SP8027 is offered with a nominal sensitivity 3600 V/W and is packaged in a 3.0 x 3.5 mm, 8lead OPLGA package. Rev 0.0 11/22/04. SP8027 High Speed Differential APC Amplifier Copyright 2004 Sipex Corporation SIPEX RESERVES THE RIGHT TO MAKE CHANGES TO THIS DATASHEET. CALL FOR UPDATES: 1-408-934-7500. SIPEX CONFIDENTIAL, PRELIMINARY & PROPRIETARY. DO NOT DISTRIBUTE OR COPY page 1 of 3 ADVANCED PIN ASSIGNMENTS Pin # 1 2 3 4 5 6 7 8 Pin Name Vcc Gain VBG GND VG1 VG2 Vout(-) Vout(+) SP8027 Pin Function Supply Voltage. Bypass to GND with ceramic capacitor 0.1F Gain Switch Input. Low level or Open selects pin VG1, high level selects pin VG2 Common connection bias voltage output for Potentiometer1 and Potentiometer2 Supply Ground Gain Adjust Potentiometer1 wiper connection or control voltage input Gain Adjust Potentiometer2 wiper connection or control voltage input Output Voltage Negative Swing Output Voltage Positive Swing OPLGA 8-pin PACKAGE DIMENSIONS Rev 0.0 11/22/04. SP8027 High Speed Differential APC Amplifier Copyright 2004 Sipex Corporation SIPEX RESERVES THE RIGHT TO MAKE CHANGES TO THIS DATASHEET. CALL FOR UPDATES: 1-408-934-7500. SIPEX CONFIDENTIAL, PRELIMINARY & PROPRIETARY. DO NOT DISTRIBUTE OR COPY page 2 of 3 ADVANCED PHOTO DETECTOR PATTERN SP8027 ORDERING INFORMATION Part number SP8027CG Temperature range 0 + 700C Package Type 8-pin OPLGA Rev 0.0 11/22/04. SP8027 High Speed Differential APC Amplifier Copyright 2004 Sipex Corporation SIPEX RESERVES THE RIGHT TO MAKE CHANGES TO THIS DATASHEET. CALL FOR UPDATES: 1-408-934-7500. SIPEX CONFIDENTIAL, PRELIMINARY & PROPRIETARY. DO NOT DISTRIBUTE OR COPY page 3 of 3 |
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