sp8027cg Exar Corporation, sp8027cg Datasheet
sp8027cg
Manufacturer Part Number
sp8027cg
Description
High Speed, Constant Bandwidth Differential Apc Amplifier
Manufacturer
Exar Corporation
Datasheet
1.SP8027CG.pdf
(3 pages)
High Speed, Constant Bandwidth
Differential APC Amplifier
FEATURES
APPLICATION
GENERAL DESCRIPTION
The SP8027 represents the next generation in Automatic Power Control (APC) amplifiers designed
specifically for demanding pick-up head applications.
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, 8-
lead 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
x
x
x
x
x
x
x
x
x
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Dual wavelength 650 and 780nm
150 MHz Bandwidth over all gains
400 V/µs Slew Rate
5 ns Setting Time
10 mV Differential Output Offset Voltage
Potentiometer, Voltage or DAC programmable gain
± 6 dB External Gain Adjust
Small 8-pin OPLGA package
CD-R, and CD-RW
DVD+/-R, DVD+/-RW, and DVD-RAM
ADVANCED
GAIN
GND
VCC
VBG
Whereas typical APC products exhibit
1
2
3
4
SP8027
OPLGA
8-Pin
SP8027
page
8
7
6
5
VOUT+
VOUT-
VG2
VG1
1
of
3
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sp8027cg Summary of contents
Page 1
High Speed, Constant Bandwidth Differential APC Amplifier FEATURES Dual wavelength 650 and 780nm x 150 MHz Bandwidth over all gains x 400 V/µs Slew Rate Setting Time Differential Output Offset Voltage x Potentiometer, Voltage ...
Page 2
PIN ASSIGNMENTS Pin # Pin Name 1 Vcc Supply Voltage. Bypass to GND with ceramic capacitor 0.1µF 2 Gain Gain Switch Input. Low level or Open selects pin VG1, high level selects pin VG2 3 VBG Common connection bias voltage ...
Page 3
... PHOTO DETECTOR PATTERN ORDERING INFORMATION Part number SP8027CG 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 ADVANCED Temperature range ...