M02046 Evaluation Module
User Guide
02046-EVMD-001-B
April, 2005
Revision History
Revision
B
A
Level
Final
Final
Date
April 2005
October 2001
Description
Completely re-written and expanded.
Initial Release
© 2005, Mindspeed Technologies
TM
, Inc. All rights reserved.
Information in this document is provided in connection with Mindspeed Technologies
TM
("Mindspeed
TM
") products. These
materials are provided by Mindspeed as a service to its customers and may be used for informational purposes only. Except as
provided in Mindspeed’s Terms and Conditions of Sale for such products or in any separate agreement related to this document,
Mindspeed assumes no liability whatsoever. Mindspeed assumes no responsibility for errors or omissions in these materials.
Mindspeed may make changes to specifications and product descriptions at any time, without notice. Mindspeed makes no
commitment to update the information and shall have no responsibility whatsoever for conflicts or incompatibilities arising from
future changes to its specifications and product descriptions. No license, express or implied, by estoppel or otherwise, to any
intellectual property rights is granted by this document.
THESE MATERIALS ARE PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESS OR IMPLIED,
RELATING TO SALE AND/OR USE OF MINDSPEED PRODUCTS INCLUDING LIABILITY OR WARRANTIES RELATING TO
FITNESS FOR A PARTICULAR PURPOSE, CONSEQUENTIAL OR INCIDENTAL DAMAGES, MERCHANTABILITY, OR
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02046-EVMD-001-B
Mindspeed Technologies™
1.0 Operation of Evaluation
Module
1.1
Functional Description
The M02046 Evaluation Module has been designed to demonstrate the performance
of all versions of the M02046 in a QSOP package. The M02046 is a highly integrated
limiting amplifier targeted for use in optical receivers operating up to 1.25 Gbps and
is compatible in designs which currently use the Mindspeed MC2046 limiting
amplifier.
The evaluation module enables the user to investigate the full functionality of the
device and the programming of the signal detect level. The high speed data inputs and
outputs are AC-coupled, with controlled impedance lines and good quality SMA
connectors providing the interface to test equipment.
Features:
Supports all versions of the part
-14 (3.3V only, CMOS ST output)
-15 (3.3/5V CMOS ST output
,
-24 (3.3V only, PECL ST output)
-25 (3.3/5V PECL ST output)
,
SMA connectors for all high-speed I/O connections with AC-coupling to the IC
allowing direct connection of inputs and outputs to test equipment
Operates with Differential input levels up to 1200 mV
PP
Signal Detected (SD) indication
Optional ROSA connection pads
Programmability
Selectable data output power down/squelch operation (Jam)
Selectable Signal Detect LED operation
Signal Detect threshold level adjustment (with resistor change)
Test Points Available
Signal Detect and LOS Outputs
Jam input
VCC3 input voltage in 3.3V operation
3.3V regulator output voltage in 5V operation
ST/LOS threshold setting voltage (STSet)
02046-EVMD-001-B
Mindspeed Technologies™
1
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1
Operation of Evaluation Module
M02046 Evaluation Module User Guide
Figure 1-1. Typical 1.25 Gbps Eye Diagram
10 mV
PP
differential input
1.25 Gbps
160 mV/div
140 ps/div
Figure 1-2. M02046 on an MC2046 EVM
+
+V
CC
Connection
Optional
ROSA
Connection
Gnd
Data Inputs
Data Outputs
Signal Detected LED
Enable JAM
Header
Enable Signal
Detect LED
Header
1-2
Mindspeed Technologies™
02046-EVMD-001-B
M02046 Evaluation Module User Guide
Operation of Evaluation Module
1.1.1
Power
A single positive 3.3V (
±
7.5%) or 5V (
±
7.5%) power supply is required to power this
module. Power is applied via 3 pin header HD1. Either 3.3V or 5V is applied to pin 1
and ground is connected to either pin 2 or 3. The correct polarity can be verified by
C18, the 10uF electrolytic capacitor adjacent to HD1 which has a marking on its
positive connection.
NOTE:
This EVM supports both the 3.3V only versions of the part (-14
and -24) and the 3.3/5V versions (-15 and -25). Please note
which device is present on the EVM before applying 5V.
The typical operating current of the EVM under nominal conditions is 50 - 55 mA.
1.1.2
Data Inputs
Data is applied via SMA Edge launched connectors SK1 and SK2. The module is
designed to accommodate differential input signals up to 1200 mVpp (600 mV
PP
single-ended). Since the inputs are AC-coupled, the input common mode level is
rejected.
1.1.3
PECL Data Outputs
The differential data PECL outputs are available at the SMA outputs SK3 and SK4
and can be directly connected to 50
Ω
test equipment. Note that a true PECL load is
.
50
Ω
to V
CC
- 2V In practice, the thevenin equivalent is used because of the difficulty
of creating the V
CC
- 2V voltage. However, the thevenin equivalent has the drawback
of being dependent on the actual V
CC
voltage.
The M02046 EVM allows the user through component selection to setup several
possible output termination configurations. Both outputs have two resistive
connections: one provides a pull-up to V
CC
and the other provides a pull-down to
ground. Resistors R4 and R5 connect their respective output to V
CC
while R12 and
R13 connect their respective output to ground. The actual values used are determined
by the value of V
CC
and whether or not true PECL output levels are required.
Table 1-1
lists the possible combinations.
NOTE:
This EVM comes configured for 3.3V operation. For 5V opera-
tion first ensure the device is a -15 or -25 revision and then
change the output PECL termination resistors (R12 and R13)
from 150 ohm to 300 ohm.
02046-EVMD-001-B
Mindspeed Technologies™
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