Create
i7110
300 Mbps LED Drivers
Data Sheet
iCreate Technologies Corporation
© 2005 iCreate Technologies Corporation
APD-8011-001
i7110
© Copyright 2005 iCreate Technologies Corporation
Information contained in this publication is intended through suggestion only and may be superseded by
updates. No liability is assumed by iCreate Technologies Corporation with respect to the use of such
information or otherwise and no representation or warranty is given. Use of iCreate’s products as critical
components in life support systems is not authorized.
No part of this document may be reproduced or transmitted in any form or by any means for any purpose
without the permission of iCreate. No licenses are conveyed, implicitly or otherwise, under any intellectual
property rights. The iCreate logo and name are registered trademarks of iCreate Technologies Corporation. All
rights reserved. All other trademarks mentioned herein are the property of their respective companies.
Data sheet marking
iCreate uses various markings in the data sheet to designate each document phase as it relates to the product
development stage.
Marking
Objective Specification
Advance Information
Preliminary
Description
The objective specification contains data for new product development.
The information is on products in the design phase. Your designs should not be
finalized with this information.
This is preliminary information on new products but not yet fully characterized.
The specifications in these data sheets are subject to change in any manner
without notice.
Information contained in the data sheet is on products in full production.
No Marking
For more information please contact:
iCreate Technologies Corporation
No. 6, Technology Rd. V, Science-Based Industrial Park,
Hsinchu, Taiwan 300
Phone
+886-3-579-0000
Fax
+886-3-579-0077
e-mail
support@icreate.com.tw
Revision：3.00
Date：05/2005
© 2005 iCreate Technologies Corporation
APD-8011-001
i7110
+3.3V to +5.0V, 300Mbps LED Driver
1
Introduction
1.2 Applications
FDDI
SDH STM-1
SONET OC-3
Fast Ethernet
Fiber Channel
1.1 General Description
The i7110 is a high-speed LED driver
designed for low-cost optical fiber based
transmission systems. Data rates up to
300Mbps can be achieved depending on
the LED used.
The differential PECL inputs can be
shaped by applying resistors between
pulse width adjustment pins and ground.
This adjustment is continuous over a
±
500ps range to compensate the LED
unbalanced ‘turn on’ and ‘turn off’ time. A
peaking and clamp circuit is implemented
in i7110 to enhance speed performance
and connecting external RC network
performs this function.
The i7110 can switch a wide range of
current 5mA to 120mA into typical
LEDs. To minimize the effects of
temperature on LED output power, the
device's modulation current can be set via
two external resistors to increase with a
temperature coefficient from 800ppm/℃ to
10000ppm/℃.
Complementary current outputs help to
maintain a constant supply current,
reducing EMI and supply noise generated
by the transmitter module, and the current
is disabled if pin Disa is Pulled high. The
i7110 is packaged in QSOP16 and
TSSOP20.
1.3 Features
Data rates up to 300 Mbps,
depending on LED.
+5 V to +3.3 V operation.
Programmable output current from
5mA to 120mA.
Peaking circuit giving rise and fall
time < 700ps.
Clamping circuit enhances turn off
time.
Resistor
programmable
compensation
for
temperature
dependence of LED output.
PECL input with optional pulse width
adjustment.
Support most LED types.
Support output current disable ability.
Single Chip solution, available in
TSSOP20 or QSOP16.
1.4 Ordering Information
Part no.
i7110-ES
i7110-EG
i7110-EP
Package
16-pin QSOP
16-pin QSOP
20-pin TSSOP
*
i7110-EG is provided in green package
© 2005 iCreate Technologies Corporation
Page 1
APD-8011-001
i7110
2
Pin Configuration and Definition
2.1 Pin Configuration
QSOP16
PWAN
PWAP
DINP
DINN
VREF
RSET2
RSET1
VDDA
GNDA
DISA
IOUTB
IOUT
IOUT
PEAK
VDDC
VDDD
TSSOP20
NC
PWAN
PWAP
DINP
DINN
VREF
RSET2
RSET1
VDDA
NC
NC
GNDA
DISA
IOUTB
IOUT
IOUT
PEAK
VDDC
VDDD
NC
I7110-ES
I7110-EP
Figure 1. i7110 pin configuration
Page 2
© 2005 iCreate Technologies Corporation
APD-8011-001
i7110
2.2 Pin Definition
Pin Name
NC
PWAN
PWAP
DINP
DINN
VREF
RSET2
RSET1
VDDA
NC
NC
VDDD
VDDC
PEAK
IOUT
IOUTB
DISA
GNDA
TSSOP20
Pin No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15,16
17
18
19
QSOP16
Pin No.
-
1
2
3
4
5
6
7
8
-
-
9
10
11
12,13
14
15
16
Not connected
Description
Inverse pulse width adjustment input
Differential pulse width adjustment input. Allows continuous
adjustment of input data pulse width
Non inverting data input pin
Inverting data input pin
Input reference voltage. Connect VREF to DINN for single
ended input
Temperature compensation adjustment pin. Allows
temperature dependence of LED light output to be reduced or
removed
Set nominal LED drive current
Power pin, connect to most positive supply
Not connected
Not connected
Power pin, connect to most positive supply
LED shorting pin, connect to most positive supply. Speeds
LED switch off
Connection for pre-emphasis or peaking circuit
Driver output
Connect a resistor between this pin and VCC
Control pin for disable current-out
Ground pin
© 2005 iCreate Technologies Corporation
Page 3
APD-8011-001
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