SP8025 SIPEX [Sipex Corporation], SP8025 Datasheet

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SP8025

Manufacturer Part Number
SP8025
Description
200V/us Integrated APC Amplifier with Gain Adjust & Differential Output
Manufacturer
SIPEX [Sipex Corporation]
Datasheet
FEATURES
integrate the photodiode and adjustable gain block on one chip. This allows the user to control
the laser power of the system in high-speed DVDRW, DVDRAM and CDRW systems. The wide
2V output swing also allows better system performance.
Rev. 6/02/03
GND
V
The SP8024, SP8025, and SP8026 are high-speed, differential output APC amplifiers that
CC
Slew Rate of 200V/µs
Fast Settling Time - 10ns
Gain Switch
2V Output Swing
Low Offset Voltage: < 10mV
Low Offset Drift: < 20µV/°C
12dB External Gain Adjust Range
®
2463
TIA
2463
R
GCOM
SP8024, 25, 26 200V/µs Integrated APC Amplifier
200V/µs Integrated APC Amplifier
R
G1
Advanced
GAIN
R
R
GAIN1
G2
with Gain Adjust & Differential Output
1
R
GAIN2
R
GAIN
GND
COM
V
31
31
CC
SP8024/8025/8026
1
2
3
4
Buffer
Buffer
SP8024/25/26
Rf2
850
850
Rf1
8 Pin COB
FUNCTIONAL DIAGRAM
© Copyright 2003 Sipex Corporation
DESCRIPTION
V
V
1V
1V
OUT
OUT
P-P
P-P
+
(Flexible Flat Cable)
-
8
7
6
5
V
50pF
R
R
50pF
V
OUT
OUT
GAIN2
GAIN1
+
-
1k
1k

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SP8025 Summary of contents

Page 1

... Low Offset Drift: < 20µV/°C 12dB External Gain Adjust Range The SP8024, SP8025, and SP8026 are high-speed, differential output APC amplifiers that integrate the photodiode and adjustable gain block on one chip. This allows the user to control the laser power of the system in high-speed DVDRW, DVDRAM and CDRW systems. The wide 2V output swing also allows better system performance ...

Page 2

... Nominal Output Sensitivity SP8024 SP8025 SP8026 Input Optical Power Required to Produce 2 V Output Swing SP8024 SP8025 SP8026 Full Scale Output Voltage Swing(Vp-p) Output Common Mode Voltage Differential Output Offset Voltage Differential Output Offset Voltage Drift Differential Output Noise Differential Output Noise ...

Page 3

... GAIN GAIN THEORY OF OPERATION and pins 5 and GAIN1 GAIN2 Sensitivity Gain (mV/µW) Factor ( 262Ω SP8024 SP8025 SP8026 - Pin 5 6. Pin 6 6. Rf1 + Rf2 GAIN = EXT is external and Rf1 = Rf2 = 850Ω © Copyright 2003 Sipex Corporation ...

Page 4

Variable Gain Amplifier: continued There are internal buffering resistors and a MOSFET switch resistance in series with the external Rgain. These internal resistances add nominal value of 62Ω. Therefore the true gain equation is: Rf1 + Rf2 ...

Page 5

Layout and Routing Considerations Special care must be taken when designing the Flex or PCB for this part. The output peak current requirement is in the order of 12.5mA when driving 50pF of capacitive load with a slew rate of ...

Page 6

... C1 0.1µ GAIN GAIN R GCOM GND Figure 3. Test and Evaluation Schematic Rev. 6/02/03 V OUT OUT SP8024 R SP8025 GAIN2 3 6 SP8026 R GAIN1 262 R G2 262 SP8024, 25, 26 200V/µs Integrated APC Amplifier 6 V OUT+ + RL1 CL1 1k 50pF + CL2 ...

Page 7

H TOP VIEW E B SIDE VIEW DETECTOR SIZE 0.35mm Detector Area Rev. 6/02/ 0.600 PIN SIDE VIEW Minimum/Maximum A C 0.70mm SP8024, 25, 26 200V/µs Integrated APC ...

Page 8

... Part Number SP8024 ................................................... -20°C to +85°C .............. 8 lead COB (3.0mm x 3.5mm) SP8025 ................................................... -20°C to +85°C .............. 8 lead COB (3.0mm x 3.5mm) SP8026 ................................................... -20°C to +85°C .............. 8 lead COB (3.0mm x 3.5mm) Corporation ANALOG EXCELLENCE Sipex Corporation Headquarters and Sales Office 233 South Hillview Drive Milpitas, CA 95035 ...

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