AMT8312 Datasheet PDF - ANADIGICS

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AMT8312
ANADIGICS

Part Number AMT8312
Description 2.5 Gb/s 850 nm PIN-TIA
Page 8 Pages


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FEATURES
• 2.5 Gb/s Differential Output TIA
• 3.3 V Operation
• 1800 MHz Bandwidth
• -23 dBm Typical Sensitivity
• 0 dBm Optical Overload
• Photocurrent Monitor
• 100 µm 850 nm PIN Photodetector
• TO-46 5 Pin Lens Package
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• SONET OC-48/SDH STM-16 (2.488 Gb/s)
• 2 x Fibre Channel (2.125 Gb/s)
• 2.5 Gb/s Infiniband
• Fibre Channel/Gigabit Ethernet (1.0625/1.25 Gb/s)
AMT8312
2.5 Gb/s 850 nm PIN-TIA
PRELIMINARY DATA SHEET - Rev 1.0
T46L
TO-46 5 pin Ball Lens
Package
PRODUCT DESCRIPTION
The ANADIGICS AMT8312, packaged in a 5 pin
TO-46 lens can, is a 3.3 V integrated photodetector
and transimpedance amplifier (TIA) used to convert
a short wavelength (850 nm) input optical signal into
a differential output voltage. The AMT8312 has a
bandwidth of 1.8 GHz, a dynamic range of over
VCC
2
23 dB and a photocurrent monitor with an output that
is proportional to the average input optical power.
These devices are readily designed into receivers,
transceivers and transponders for SONET, Fibre
Channel and Infiniband applications.
PIN
IMON
3
RF
DC Compensation
Offset
Control
5
Figure 1: Functional Block Diagram
1
VOUTN
VOUTP
4
09/2003



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AMT8312
5
Figure 2 : T46L Pin Outline (Bottom View)
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1 VOUTN
2 VCC
3 IMON
4 VOUTP
5 Ground
Table 1: TO-46 Package Pin Description
DESCRIPTION
Inverted Output Voltage. Logical '0' with an optical input. Needs to be AC
coupled to the load.
Positive Supply Voltage: 3.0 to 3.6 V
Mirrored average photodiode current. The IMON pin is open drain and
should be connected through a 2.0 k resistor to 3.3 V.
Non-Inverted Output Voltage: Logical '1' with an optical input. Needs to be
AC coupled to the load.
Ground: Case is grounded.
ELECTRICAL CHARACTERISTICS
Table 2: Absolute Maximum Ratings
PARAMETER
MIN MAX UNIT
Supply Voltage
-0.5 6.0
V
Optical Input Power
- + 4 dBm
Storage Temperature
- 40 + 125
°C
Stresses in excess of the absolute ratings may cause permanent
damage. Functional operation is not implied under these conditions.
Exposure to absolute ratings for extended periods of time may
adversely affect reliability.
2 PRELIMINARY DATA SHEET - Rev 1.0
09/2003



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AMT8312
Table 3: Electrical Specifications
PARAMETER
MIN TYP MAX UNIT
Wavelength (λ)
Detector Diameter
Small Signal Differential
Responsivity (@ 100 MHz) (1)
Bandwidth (1)
Low Frequency Cutoff
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Optical Overload (2)
Optical Sensitivity (2)
Maximum Differential Output Voltage
TRISE and TFALL (20-80%) (3)
Duty Cycle Distortion (4)
Total Jitter (4), (5)
Supply Current
Operating Voltage Range
Operating Case Temperature
850 -
- 100 -
10000 14500 -
1500 1800 -
- 30 -
- 50 -
0-
-21 -23
-
- 550 700
- 140 -
-5-
60
- 40 60
+3.0 +3.3 +3.6
-30 - +105
nm
µm
V/W
MHz
kHz
dBm
dBm
mV
ps
%
ps
mA
Volts
°C
Notes:
(1) Measured at -20 dBm optical input power with output connected into RL = 100(differential)
(2) Measured at 10-10 BER with a 223-1 PRBS at 2.5 Gb/s
(3) Measured with a 223-1 PRBS at 2.5 Gb/s, an input optical power of –20 dBm and RL = 100(differential)
(4) Measured with a 223-1 PRBS at 2.5 Gb/s, an input optical power of –3 dBm and RL = 100(differential)
(5) 6 σ about the center eye crossing.
PRELIMINARY DATA SHEET - Rev 1.0
09/2003
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AMT8312
PERFORMANCE DATA
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100 ps/Div.
50 mV/Div.
Figure 3: Eye Diagram with an Optical Input Power of –20 dBm
100 ps/Div.
90 mV/Div.
Figure 4: Eye Diagram with an Optical Input Power of –15 dBm
100 ps/Div.
90 mV/Div.
Figure 5: Eye Diagram with an Optical Input Power of –10 dBm
4 PRELIMINARY DATA SHEET - Rev 1.0
09/2003



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