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SPFMPR302 Datasheet Preview

SPFMPR302 Datasheet

Plastic Fiber Optic Receiver

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SPF MPR3 02
Plastic Fiber Optic Receiver for MOST®
Data Sheet
Description
The 4-pin MOST Optical Receiver (MPR3 02) is a highly
integrated CMOS IC combined with a high speed PIN
- diode designed to receive up to 25Mbit/s optical data
which is bi-phase coded at up to 50Mbaud and convert
this optical data to a TTL compatible data stream.
This high performance, low cost, CMOS receiver consists
of a low noise transimpedance amplifier and comparator
in the data path. A timer circuit puts the part into a low
power mode if optical data is not received for 10µs (typ.).
During the low power mode, the PIN diode is still being
observed and if activity is detected, Bigfoot will resume
full power operation within 3.5ms (typ.).
A STATUS-pin indicates if modulated light is received
(Light on -> STATUS = low). With the STATUS-pin the
power supply of the whole MOST device can be switched
ON.
Features
Excellent solution for converting high speed data from
Plastic Optical Fiber (POF) to digital output.
High speed receiver up to 50 MBaud
(25Mbit/s net data rate)
TTL Data Output (Light to Logic Function)
Network activity sensing during ZeroPower Mode
(ICC<10µA)
BUS Activity Status Output
Good 650nm sensitivity for working in a low
attenuation range of PMMA Fiber
Low cost
Applications
Optical Receiver for MOST Systems
MPR3 02
Actual design status
IC Revision package type
J CAI
Optical Sensitivity device marking
-24.5 dBm
MPR3 02




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SPFMPR302 Datasheet Preview

SPFMPR302 Datasheet

Plastic Fiber Optic Receiver

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Maximum Ratings
Parameter
Symbol Min Max
Storage Temperature Range
Junction Temperature
Soldering Temperature
(>2.5 mm from case bottom t5s)
TSTG
TJ
TS
-40 100
-40 100
- 235
Power Dissipation
PTOT
Power Supply Voltage
VCCMax
DC Current To Any Pin Except Power II/OMax
- 300
-0.5 6.0
- ±10
Unit
°C
°C
°C
mW
V
mA
Recommended Operating Conditions
Parameter
Supply Voltage
Operating Temperature Range
Symbol
VCC
TA
Min Max Unit
4.75 5.25 V
-40 85 °C
All the data in this specification refers to the operating
conditions above unless otherwise stated.
Optical Signal Characteristics (22.5 MBit MOST Data)
Parameter
Symbol
Min Typ
Max Unit
Maximum Photosensitivity Wavelength (TA=25°C)
Photosensitivity Spectral Range (TA=25°C) (S ≥ 10% Smax)
Optical Sensitivity[1][2][3]
λSmax - 850 - nm
λ
400 -
1100 nm
S -24.5 - - dBm
Optical overload[1][2][3]
Pmax -2 - - dBm
Optical receivable power for low power mode[1]
POFF - - -40 dBm
Notes:
1. Optical power data are average values when using a MOST optical transmitter with λpeak of 650 nm typical and measured at the end of a plastic
optical fiber with metal insert.
2. It is proposed to use the OptoLyzer4MOST, MOST Optical Network Analyzer, described in: http://www.oasis.de (with MOST Data @44.1KHz FS) or
Standard BER Measuring Equipment running with 45 MBaud (BER10-9 with 27-1 word length).
3. The values are determined by locking a OS8104 in Slave-mode to the signal.
AC Electrical Characteristics
Parameter
Power Supply Rejection Ratio
Output Rise Time
Output Fall Time
Output Pulse Width Variation[2]
Output Average Pulse Width Distortion[2]
Power-up time at detection of rising VCC
Power-up time from low power mode[3]
Low Power mode timer delay
Test Conditions
25 MHz Power Supply Noise
CL=10pF[1]
CL=10pF[1]
MOST Data 44.1 kHz FS (-2...-24.5dBm)
MOST Data 44.1 kHz FS (-2...-24.5dBm)
When part first powers up
Time from detection of inactivity to low
power mode
Symbol
PSRR
tr
tf
tPWV
tAPWD
tPUO
tPU
TLPM
Min Typ Max Unit
- 30 - dB
- 7.5 9 ns
- 6 7 ns
15.5 -
32.8 ns
0 - 8 ns
-
3.5 17
ms
-
2.5 12
ms
- 10 22 µs
Notes:
1. With CL = 25pF, the rise/ fall increases to about 12 ns. Therefore, keep the distance from The IC to the MOST – chip as short as possible for keeping
CL low.
2. MOST Data 44.1KHz FS corresponds to a 45 MBaud data stream. Since the transmitter is used as optical source, this is the link PWV/APWD which
appears from node to node. Optical power data are average values when using a MOST optical transmitter with λpeak of 650 nm typical and
measured at the end of a plastic optical fiber with metal insert.
3. Any receiving circuitry receiving data from RX_DATA must be powered within 50ms after /STATUS gets active. There must be a protective resistor
of 50Ohm (minimum) between RX_DATA and the receiving circuitry. A typical value for this resistor is 150Ohm.



Part Number SPFMPR302
Description Plastic Fiber Optic Receiver
Maker Avago
Total Page 7 Pages
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