02049-EVMD-001-D Datasheet, PDF (7/17 Pages) M/A-COM Technology Solutions, Inc. – M02040/43/49/50 Evaluation Module

M02040/43/49/50 Evaluation Module User Guide
Operation of Evaluation Module
1.1.2
1.1.3
1.1.4
NOTE:
Switch 2, the supply selection switch, does not need to be set to
the proper supply location prior to connecting the supply. How-
ever, it is important to not connect 5V to the 3.3V supply input
(JP3) as this will damage the IC regulator output because 5V
will be connected to the IC’s 3.3V regulator output.
Using the M02043 or M02049 with low CML output levels selected and the LED off,
the typical operating current of the EVM under nominal conditions of the EVM is 32
mA. For the M02040/50 EVM, typical operating current under nominal conditions is
55 mA.
I_REF
R2 is a 12.1 kΩ 1% resistor that is used to set an on-chip reference current. This
current, typically 100 µA, is the main reference for determining the bias current for
the rest of the device. P8 is provided to measure the voltage at the I_REF input, typically
1.2V. Direct capacitive loading of I_REF pin could cause instability and is not
recommended.
Data Inputs
Data is applied via SMA Edge launched connectors J3 and J4. The module is designed
to accommodate differential input signals up to 1200 mVpp (600 mVpp single-
ended). Since the inputs are AC-coupled, the input common mode level is rejected.
CML Data Outputs (M02043 and M02049)
The differential data outputs are available at J1 and J2 and can be directly connected
to 50Ω test equipment. The outputs are internally back terminated with 100Ω pull-ups
to the positive supply. The outputs are Current Mode Logic (CML) compatible. The
output swing can be selected using S4 and can be either 400 mVpp or 840 mVpp
differential. The single ended output current (I_EE) in each mode is typically 6 mApp
and 13 mApp.
Microstrip transmission lines have been used to provide good quality transmission
from the device to the test equipment. Figure 1-2 and Figure 1-4 demonstrate the
typical performance with 400 mV (differential) output swing selected.
The Single Ended Output Voltage Swing
= I_OUTPUT x (Rout || Rload)
Where:
I_OUTPUT = 6 mA or 13 mA
For lowest overall power consumption the low CML output swing should be selected.
02049-EVMD-001-D
Mindspeed Technologies™
1-5