03/2001
T46L
TO-46 Lens
Package
T46F
TO-46 Ultra Flat
Window Package
AMT121302
1.25 Gb/s 1310/1550nm PIN TIA
Data Sheet - Rev 1
PRODUCT DESCRIPTION
The ANADIGICS AMT121302, packaged in a TO46
flat window or lens can, is a 5V integrated
photodetector and transimpedance amplifier (TIA)
used to convert a long wavelength (1270-1560nm)
input optical signal into a differential output voltage,
and is manufactured in ANADIGICS 6 GaAs wafer
fabrication facility. The TIA maximizes the
Figure 1: Block Diagram
receiver performance by providing a negative voltage
to reverse bias the photodetector which allows the
device to achieve high sensitivity and wide bandwidth.
These products are readily designed into receivers
and transceivers for Gigabit Ethernet and Fibre
Channel applications.
FEATURES
·1.25 Gb/s Differential Output TIA
·5.0V Operation
·Automatic Gain Control
·75mm 1270-1560nm InGaAs Photodetector
·1000 MHz Minimum Bandwidth
·-28dBm Typical Sensitivity
·TO-46 Ultra Flat-Window or Lens Package
APPLICATIONS
·Gigabit Ethernet (1.250 Gb/s)
·Fibre channel (1.064 Gb/s)
4K
Charge
Pump
AGC
OUT
OUT
V
DD
4
2
1
3
6.5 GHz
OSC
US Patents: 5047728, 5646573
PIN
2
AMT121302
Data Sheet - Rev 1
03/2001
Table 2: Absolute Maximum Ratings
V
DD
V0.7
P
NI
mBd5+
T
S
C°521otC°56-.pmeTegarotS
Table 1: Package PIN Description
Figure 2: T46F/T46L Pin Outline (Bottom View)
ELECTRICAL CHARACTERISTICS
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.
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3
AMT121302
Data Sheet - Rev 1
03/2001
Table 3: Electrical Characteristics
Notes:
1. Measured at -17 dBm optical input power with a SMF and output connected into
RL = 100 W (differential).
2. Measured at 10 10 BER with a 27-1 PRBS, 1.25 Gb/s.
3. Input optical power = -3 dBm, RL = 100 W (differential).
4. Measured with a 625 MHz, 50% duty cycle square wave.
5. Measured with a 1.25 Gb/s, 27-1 PRBS.
6. 1s about the center eye crossing.
7. 6s about the center eye crossing.
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AMT121302
Data Sheet - Rev 1
03/2001
Figure 3: Frequency Response *
Figure 4: Eye Diagram with an Optical Input Power of -3.0dBm
Figure 5: Eye Diagram with an Optical Input Power of -17dBm
0
5
10
15
20
25
30
35
0 500 1000 1500 2000 2500 3000 3500
Frequ en cy (M H z )
Amplitude (dB)
* Calibrated with an optical reference receiver with a gain of 21.62 dB at
50 MHz and a responsively of 11.77462 A/W.
100mV/Div 200ps/Div
50mV/Div 200ps/Div
PERFORMANCE DATA
5
AMT121302
Data Sheet - Rev 1
03/2001
Figure 6: Supply Current vs. Case Temperature Figure 7: Bandwidth vs. Case Temperature
20
25
30
35
40
45
0 102030405060708090
Case Temperature (C)
Supply Current (mA)
4.5V
5.0V
5.5V
1040
1060
1080
1100
1120
1140
1160
0 102030405060708090
Case Temperature (C)
Bandwidth (MHz)
4.5V
5.0V
5.5V
Figure 8: Differential Responsivity vs. Temperature
2500
2750
3000
3250
3500
3750
0 102030405060708090
Case Te m p er at u re (C)
Differential R esponsivi ty (V/W)
4.5V
5.0V
5.5V
Figure 9: Sensitivity vs. Case Temperature
-28.80
-28.60
-28.40
-28.20
-28.00
-27.80
-27.60
-27.40
-27.20
-27.00
0 102030405060708090
Case Tempe rat ure (C)
Sensitivity (dBm)
4.5V
5.0V
5.5V
6
AMT121302
Data Sheet - Rev 1
03/2001
Lightwave
Analyzer
HP 8702D
Laser Optical Attenuator DU T Te st
Fixture
Power
Supply
Extinction
Ratio= 3dB
Figure 10: Test Setup for Frequency Response
Laser Optical
Attenuator DUT Test
Fixture
Power
Supply
Pulse Pattern
Generator Limiting
Amplifier
Error
Detector Hybrid
Coupler
Extinction
Ratio = 9dB
BERT
25 dB Gain
Figure 11: Test Setup for Sensitivity
Pulse Pattern
Generator
Laser Optical
Attenuator DUT Test
Fixture
Power
Supply
Digital
Communication
Analyzer HP 83480A
Extinction
Ratio = 9dB
Figure 12: Test Setup for Eye Measurements
MEASUREMENT METHODS
7
AMT121302
Data Sheet - Rev 1
03/2001
V
OUT
V
OUT
DUT
0.1uF
0.1uF
0.1uF
V
DD
Figure 13: DUT Test Fixture Schematic
Figure 14: Application Schematic
4K
Charge
Pump
AGC
OUT
OUT
V
DD
4
2
1
3
LIMITING
AMPLIFIER
0.1uF
0.1uF
C
F
R
O
0.1uF
6.5 GHz
OSC
APPLICATION INFORMATION
CF is an optional single pole noise filter
fc is the desired cutoff frequency
R = 50 W
RO is required with high input resistance limiting amplifiers
RO = 100 W
f
c
R
C
F
π
=21
8
AMT121302
Data Sheet - Rev 1
03/2001
4K
Charge
Pump
AGC
OUT
OUT
V
DD
4
2
1
3
0.1uF
0.1uF
0.1uF
V
OUT
V
OUT
6.5 GHz
OSC
Figure 15: Evaluation Board Schematic
Figure 16: Evaluation Board Layout
9
AMT121302
Data Sheet - Rev 1
03/2001
TO46-1300nm DIFFERENTIAL FLAT WINDOW
NOTES:
SEATING PLANE
ØD1
ØD
h
l
l
lA
ee
e
e
1
2
1
1
Øb2
Øb
0.016 [0. 41mm] MAX.
#4
#2
#1
#3
BOTTOM VIEW
1. INTERNAL OPTICAL HEIGHT = 0.065±0.005[1.65±0.1]
SEE NOTE 1
2. BENT LEADS SHOULD NOT EXTNED OU TSIDE
DIAMETER (ØD) OF CAP OR TOUCH EACH OTHER.
3. ALL DIMENSIONS ARE REFENENCE ONLY-EXCEPT A, D & h.
12.70
6.35
0.30
4.60
MIN.
2.85
0.41
5.46
0.36
l
2
1
l
l
1
e
e
h
1
2
Øb
Øb
ØD
ØD
MB
YO
S
L
A
13.70
1.27
0.53
13.20
0.46
2.54 T.P.
1.27 T.P.
0.48
4.75
MAX.
3.00
0.51
5.61
2.95
NOM.
MILLIMETERS
Figure 17: T46F Package Outline Diagram
PACKAGE OUTLINE
10
AMT121302
Data Sheet - Rev 1
03/2001
Figure 18: T46L Package Outling Diagram
11
AMT121302
Data Sheet - Rev 1
03/2001
NOTES
Data Sheet - Rev 1
03-2001
12
IMPORTANT NOTICE
ANADIGICS, Inc. reserves the right to make changes to its products or to discontinue any product at any time without
notice. The product specifications contained in Advanced Product Information sheets and Preliminary Data Sheets are
subject to change prior to a products formal introduction. Information in Data Sheets have been carefully checked and are
assumed to be reliable; however, ANADIGICS assumes no responsibilities for inaccuracies. ANADIGICS strongly urges
customers to verify that the information they are using is current before placing orders.
WARNING
ANADIGICS products are not intended for use in life support appliances, devices, or systems. Use of an ANADIGICS
product in any such application without written consent is prohibited.
ANADIGICS, Inc.
141 Mount Bethel Road
Warren, New Jersey 07059, U.S.A
Tel: +1 (908) 668-5000
Fax: +1 (908) 668-5132
http://www.anadigics.com
Mktg@anadigics.com
AMT121302
ORDERING INFORMATION
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