SE1230Q
LightCharger
™
2.5 Gb/s Automatic Gain Control Amplifier
Final
Applications
SONET/SDH-based transmission systems, test
equipment and modules
OC-48 fibre optic modules
Gigabit Ethernet
Fibre Channel
Wideband RF gain block
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 SE1230 is a fully integrated
AGC amplifier aimed primarily at SONET OC-48 and
SDH STM-16 systems. The device may also be used
in any datacom application with input data rates up to
2.5 Gb/s.
The device is designed with differential I/Os and
signal levels compatible with SiGe Semiconductor’s
SE1030 and SE1031 transimpedance amplifiers. A
system block diagram is shown after the functional
description, on page 4.
Optimum performance is provided by differential
connections but with appropriate terminations, the
device can also be used in single-ended mode if
required by the application.
Features
Single +3.3 V supply
Power dissipation = 230 mW (typ)
Noise figure < 12 dB
Small signal gain = 23.5 dB differential
Fully integrated AGC function
On-chip 50
Ω
input and output terminations
Wide bandwidth (–3 dB) > 2.0 GHz
Maximum input level of 200 mVpk
AGC output level of 370 mVpk differential
Loss of signal functionality
Single-ended or differential operation
Minimal external components
Operating ambient temperature range = -40°C to
+85°C
Equivalent to Nortel Networks AC10
Ordering Information
Type
SE1230Q
Package
5 mm, 32 pin LQFP
Remark
None
Functional Block Diagram
INP
INN
Variable
Gain
Output
Buffer
OUTP
OUTN
SE1230
AGC Amp
2.5 Gb/s
OUTP OUTN
Integrator
Rectifier
LOS
Rectifier/
Comparator
Vref2
LOS_INIT
Bandgap
Ref
Vref1
AGC_ADJ
49-DST-01
Rev 1.4
Apr 29/02
1 of 9
SIGE [ SIGE SEMICONDUCTOR, INC. ]
