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SE1030W PDF даташит

Спецификация SE1030W изготовлена ​​​​«SiGe Semiconductor Inc.» и имеет функцию, называемую «LightCharger 2.5 Gb/s Transimpedance Amplifier Final».

Детали детали

Номер произв SE1030W
Описание LightCharger 2.5 Gb/s Transimpedance Amplifier Final
Производители SiGe Semiconductor Inc.
логотип SiGe Semiconductor  Inc. логотип 

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SE1030W Даташит, Описание, Даташиты
SE1030W
LightCharger2.5 Gb/s Transimpedance Amplifier
Final
Applications
§ SONET/SDH-based transmission systems, test
equipment and modules
§ OC-48 fibre optic modules and line termination
§ ATM optical receivers
§ Gigabit Ethernet
§ Fibre Channel
Features
§ Single +3.3 V power supply
§ Input noise current = 360 nA rms when used with
a 0.5 pF detector
§ Transimpedance gain = 2.3 kinto a 50 load
(differential)
§ On-chip automatic gain control gives input
current overload of 2.6 mA pk and max output
voltage swing of 300 mV pk-pk
§ Differential 50 outputs
§ Bandwidth (-3 dB) = 2.4 GHz
§ Wide data rate range = 50 Mb/s to 2.5 Gb/s
§ Constant photodiode reverse bias voltage = 1.5 V
(anode to input, cathode to VCC)
§ Minimal external components, supply decoupling
only
§ Operating junction temperature range = -40°C to
+125°C
§ Equivalent to Nortel Networks AB89-A2A
Ordering Information
Type
SE1030W
Package
Bare Die
Remark
Shipped in
Waffle Pack
Functional Block Diagram
Product Description
SiGe Semiconductor offers a portfolio of optical
networking ICs for use in high-performance optical
transmitter and receiver functions, from 155 Mb/s up
to 12.5 Gb/s.
SiGe Semiconductor’s SE1030W is a fully integrated,
silicon bipolar transimpedance amplifier; providing
wideband, low noise preamplification of signal current
from a photodetector. It features differential outputs,
and incorporates an automatic gain control
mechanism to increase dynamic range, allowing input
signals up to 2.6 mA peak. A decoupling capacitor on
the supply is the only external circuitry required. A
system block diagram is shown after the functional
description, on page 3.
Noise performance is optimized for 2.5 Gb/s
operation, with a calculated rms noise based
sensitivity of –26 dBm for 10-10 bit error rate, achieved
using a detector with 0.5 pF capacitance and a
responsivity of 0.9 A/W, with an infinite extinction ratio
source.
SE1030
TzAmp
2.5 Gb/s
VCC or +ve supply
Automatic Gain Control
Integrator
Rectifier
Input
Current
TZ_IN
Rf
Tz Amp
Bandgap
Reference
Output
Driver
50
50
OUTP
OUTN
43-DST-01 § Rev 1.5 § May 24/02
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SE1030W Даташит, Описание, Даташиты
Bondpad Diagram
SE1030W
LightCharger2.5 Gb/s Transimpedance Amplifier
Final
VCC
1
DNC
2
TZ_IN 3
Top
View
4567
VEE2 VEE1 VEE1 VEE1
11 VCC
10 OUTP
9 OUTN
8
VCC
Bondpad Description
Pad No.
1
2
3
4
5
6
7
8
9
10
11
Name
VCC
DNC
TZ_IN
VEE2
VEE1
VEE1
VEE1
VCC
OUTN
OUTP
VCC
Description
Positive supply (+3.3 V), pads 1, 8 & 11 are connected on chip. Only one pad needs
to be bonded.
Do not connect.
Input pad (connect to photodetector anode).
Negative supply (0V) – Note this is separate ground for the input stage, which is AC
coupled on chip. There is no DC current through this pad.
Negative supply (0V), pads 5, 6 & 7 are connected on chip. Only one pad needs to be
bonded.
Negative supply (0V), pads 5, 6 & 7 are connected on chip. Only one pad needs to be
bonded.
Negative supply (0V), pads 5, 6 & 7 are connected on chip. Only one pad needs to be
bonded.
Positive supply (+3.3 V), pads 1, 8 & 11 are connected on chip. Only one pad needs
to be bonded.
Negative differential voltage output.
Positive differential voltage output.
Positive supply (+3.3 V), pads 1, 8 & 11 are connected on chip. Only one pad needs
to be bonded.
43-DST-01 § Rev 1.5 § May 24/02
2 of 9









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SE1030W Даташит, Описание, Даташиты
SE1030W
LightCharger2.5 Gb/s Transimpedance Amplifier
Final
Functional Description
Amplifier Front-End
The transimpedance front-end amplifies an input
current from a photodetector, at pin TZ_IN, to produce
a differential output voltage with the feedback resistor
Rf determining the level of amplification (see the
functional block diagram on page 1). An automatic
gain control loop varies this resistor, to ensure that
the output from the front-end does not saturate the
output driver stage that follows. This gain control
allows input signals of up to 2.6 mA peak.
The input pin TZ_IN is biased at 1.5 V below the
supply voltage VCC, allowing a photodetector to have
a constant reverse bias by connecting the cathode to
3.3 V. This enables full single rail operation.
The front-end stage has its own supply ground
connection (VEE2) to achieve optimum noise
performance and maintain integrity of the high-speed
signal path. The front-end shares the VCC (+3.3 V)
connection with the remainder of the circuitry, which has
a separate ground (VEE1).
Output driver stage
The output driver acts as a buffer stage, capable of
swinging up to 300 mVpk-pk differential into a 100
load. The small output swings allow ease of use with
low voltage post amplifiers (e.g. 3.3 V parts).
Increasing optical input level gives a positive-going
output signal on the OUTP pin.
Automatic Gain Control (AGC)
The AGC circuit monitors the voltages from the output
driver and compares them to an internal reference
level produced via the on-chip bandgap reference
circuit. When this level is exceeded, the gain of the
front-end is reduced by controlling the feedback
resistor Rf.
A long time-constant integrator is used within the
control loop of the AGC with a typical low frequency
cut-off of 5 kHz.
System Block Diagram
2.5 GHz
2.5 Gb/s
2
2
Clock
Data
Clock & Data
Recovery
2
AGC
Amplifier
SE1230
2
LOS
Receiver Module
SE1030W
TZ
Amplifier
PIN
43-DST-01 § Rev 1.5 § May 24/02
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Номер в каталогеОписаниеПроизводители
SE1030WLightCharger 2.5 Gb/s Transimpedance Amplifier FinalSiGe Semiconductor  Inc.
SiGe Semiconductor Inc.

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