i7032
+3.3V to +5.0V, 200Mbps Laser-Diode Driver
1. Introduction
1.1. General description
The i7032 is the 3.3V to 5V, 200Mbps laser-diode
driver with automatic power control (APC). Both accept
differential PECL inputs and provide complementary
output currents. A temperature-compensated reference
voltage is provided for laser bias and modulation
current programming. This allows maximum 80mA to
be programmed for bias and modulation current with
two external resistors.
The
i7032
provides
adjustable
temperature-
compensated modulation current to keep the optical
extinction rate within specifications over the operation
temperature range.
The APC circuits incorporated with a monitor
photo-diode and two external resistors maintain laser’s
average power. A failure-monitor output is provided to
indicate when the APC loop is unable to maintain
average power. To prevent laser diode damage, an
integrated soft-start circuit is provided. The output load
can be DC and AC coupled in both 3.3V and 5V
applications.
The i7032 is in 24-pin QFN package.
1.2. Features
Rise / fall time less than 1 ns.
Maximum 80mA bias current.
Maximum 80mA modulation current.
Differential PECL inputs.
Automatic Power Control (APC).
+3.3V to +5V supply voltage.
On chip temperature-compensated
reference voltage.
Wide operation temperature range: -
40℃ ~ +85℃.
Integrated soft-start circuit.
On chip temperature-compensated
modulation current.
1.3. Applications
155Mbps SDH/SONET
Laser-Diode Transmitters
1.4 Ordering information
Part
Pin-Package
i7032-EN
24 QFN (4mmX4mm)
i7032-ET
32 TQFP (5mmX5mm)
2. Pin configuration and definition
© 2003 iCreate Technologies Corporation
Page 1
2.1. Pin configuration
i7032-EN
24-pin
QFN
61
ENABLE
VREF1
ROSADJ
IBIASFB
IBIASSET
IMODSET
VCCA
IPIN
SLWSTRT
VREF2
IPINSET
FAILOUT
4
2
1
3
4
5
6
78
9
10
11
12
17
18
16
15
14
13
24
23
22
21
20
19
Figure 2. i7032-ET pin configuration
Figure 1. i7032-EN pin configuration
This document contains preliminary information on product but not yet fully characterized.
ICR-DS-i7032001
iCreate Technologies Corporation reserves the right to change the specification in any manner without notice.
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