
SE1030W
LightCharger
2.5 Gb/s Transimpedance Amplifier
Final
43-DST-01
§
Rev 1.5
§
May 24/02
1 of 9
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 k
into 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
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.
automatic
gain
control
VCC or +ve supply
SE1030
TzAmp
2.5 Gb/s
Tz Amp
Output
Driver
Bandgap
Reference
Integrator
Rectifier
Automatic Gain Control
TZ_IN
Input
Current
OUTP
OUTN
50
50
R
f