sp8034 Exar Corporation, sp8034 Datasheet

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sp8034

Manufacturer Part Number
sp8034
Description
250 V/?s Apc Amplifier With Integrated Photodiode And Gain Adjust Capability
Manufacturer
Exar Corporation
Datasheet

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Company
Part Number
Manufacturer
Quantity
Price
Part Number:
sp8034A
Manufacturer:
SIPEX
Quantity:
20 000
FEATURES
The SP8034 represents the next generation APC amplifier with integrated photodetector. This
device monitors the light intensity of the laser diode in CD-R, CD-RW, DVD-R, DVD-RW and
DVD-RAM assemblies by sensing the laser power with an integrated photodiode. The amplified
signal from the APC contains the laser power information. This signal is subsequently fed back
to the laser diode driver to control its power. The on-chip photodetector transforms incident
light into a proportional current. This current is then converted to a voltage through a
transimpedance amplifier. Adjustable gain is provided in the transimpedance amplifier by means
of a gain control loop that is controlled by an external resistor. The external resistor is not part
of the signal path, which greatly reduces the effects of all parasitic capacitances and inductances
on the flex cable at these pins. The signal is buffered to provide reactive load drive
capability.
The SP8034 achieves an unparalleled level of performance by combining excellent DC sta-
bility and low noise with outstanding AC performance. This level of performance is achieved
using a proprietary fully complementary BiCMOS process with fully integrated, on-board
photodetectors. The SP8034 is offered with a nominal gain of 2000V/W and is packaged in a 3.0mm
x 3.5mm, 8 lead COB package.
Rev. 5/21/03
Figure 1. Functional Diagram
Digital Gain Select
Slew Rate of 250V/us
7ns Settling Time to 1% for 1.5V Step
10 mV Output Offset Voltage
20uV/°C Output Offset Drift
+/- 6 dB External Gain Adjust
250 V/µs APC Amplifier with Integrated Photodiode
GND
V
CC
®
SP8034 APC Amplifier with Integrated Photodetector
TIA
PRELIMINARY
R
GCOM
1
Gain Control
Rg1
Gain Select
and Gain Adjust Capability
Rg2
R
GAIN1
GAIN SEL
RG
2000
R
R1
2000
GAIN2
GND
R1
V
COM
CC
1
2
3
4
Buffer
6000
R2
6000
R2
6k
S P8034
8 Pin COB
© Copyright 2003 Sipex Corporation
V
V
OUT
REF
SP8034
DESCRIPTION
8
7
6
5
V
V
R
R
OUT
REF
GAIN2
GAIN1

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sp8034 Summary of contents

Page 1

... The SP8034 achieves an unparalleled level of performance by combining excellent DC sta- bility and low noise with outstanding AC performance. This level of performance is achieved using a proprietary fully complementary BiCMOS process with fully integrated, on-board photodetectors. The SP8034 is offered with a nominal gain of 2000V/W and is packaged in a 3.0mm x 3.5mm, 8 lead COB package. V ...

Page 2

... GAIN T = 25°C A Full Temp 150Ω < R < 950Ω GAIN 250Ω< R < 950Ω GAIN ) OUT SP8034 APC Amplifier with Integrated Photodetector 2 ELECTRICAL SPECIFICATIONS =400Ω and R = 1kΩ GAIN LOAD REF MIN TYP MAX UNITS 4.5 5 5.5 ...

Page 3

... V REF 8 V OUT The SP8034 is an Automatic Power Control (APC) circuit for pick-up head applications. The part consists of a photo-detector that con- verts the light (780nm or 650nm) into current, and active circuitry (transimpedance amp- lifier and buffer) to convert the current into voltage ...

Page 4

... Depends on FPC V REF 7 S P8034 R GAIN2 6 R GAIN1 400 R G1 400 = 5V, Gain = 0V, Rgain = 400. CC SP8034 APC Amplifier with Integrated Photodetector 4 1 and GAIN 1 GAIN - are routed away from OUT V OUT + CL1 50pF 0.1µF V REF © Copyright 2003 Sipex Corporation ...

Page 5

... E B SIDE VIEW DETECTOR SIZE 0.35mm Detector Area Rev. 5/21/03 PACKAGE: 8 PIN COB (3mm x 3.5mm 0.600mm PIN SIDE VIEW A C Minimum/Maximum 0.70mm SP8034 APC Amplifier with Integrated Photodetector 5 L BOTTOM VIEW DIMENSIONS in mm 8–PIN COB A 0.90/1.10 B .127/.33 b 0.30/0.50 C 0.50 nom D 2.90/3.10 E 3.00/3.20 e ...

Page 6

... Part Number SP8034CB-3............................................ -20°C to +85°C .............. 8 lead COB (3.0mm x 3.5mm) SP8034CB-3/TR...................................... -20°C to +85°C .............. 8 lead COB (3.0mm x 3.5mm) Corporation SIGNAL PROCESSING EXCELLENCE Sipex Corporation Headquarters and Sales Office 233 South Hillview Drive Milpitas, CA 95035 TEL: (408) 934-7500 FAX: (408) 935-7600 Sales Office ...

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