ON Semiconductor NB7L216MNEVB User Manual
© Semiconductor Components Industries, LLC, 2012
February, 2012 − Rev. 1
1 Publication Order Number:
EVBUM2085/D
NB7L216MNEVB
NB7L216 Evaluation Board
User's Manual
Description
This document describes the NB7L216 evaluation board
and the appropriate lab test setups. It should be used in
conjunction with the NB7L216 data sheet which contains full
technical details on the device specifications and operation.
The evaluation board is designed to facilitate a quick
evaluation of the NB7L216 GigaCommt High Gain
Differential Receiver/Driver.
Board Lay−up
The evaluation board is implemented in two layers and
provides a high bandwidth 50 W controlled impedance
environment for higher performance. First layer or primary
trace layer is 5 mils thick Rogers RO6002 material, which
is engineered to have equal electrical length on all signal
traces from NB7L216 device to the sense output. The second
layer is 32 mils thick copper ground plane. For standard lab
setup and test, a split (dual) power supply is required
enabling the 50 ohm impedance in the scope to be used as
termination of the ECL signals (V
TT
= VCC – 2.0 V, in split
power supply setup, V
TT
is the system ground).
What measurements can you expect to make?
With this evaluation board, the following measurements
could be performed in single−ended
(1)
or differential modes
of operation:
• Jitter
• Output Skew
• Gain/Return Loss
• Eye Pattern Generation
• Frequency Performance
• Output Rise and Fall Time
• V
CMR
(Common Mode Range)
1. Single−ended measurements can only be made at
V
CC
− VEE = 3.3 V using this board setup.
Figure 1. NB7L216 Evaluation Board
http://onsemi.com
EVAL BOARD USER’S MANUAL
NB7L216MNEVB
http://onsemi.com
2
SETUP FOR TIME DOMAIN MEASUREMENTS
Table 1. BASIC EQUIPMENT
Description Example Equipment (Note 1) Qty.
Power Supply with 4 outputs HP6624A 1
Oscilloscope TDS8000 with 80E01 Sampling Head (Note 2) 1
Differential Signal Generator HP 8133A, Advantest D3186 1
Matched High Speed Cables with SMA Connectors Storm, Semflex 4
Power Supply Cables with Clips 3/4
1. Equipment used to generate example measurements.
2. 50 GHz sampling head used (for effective rise, fall and jitter performance measurement)
Setup
Step 1: Connect Power
1a: Three power levels must be provided to the board for
V
CC
, VEE, and GND via the surface mount clips. Using the
split power supply mode, GND = V
TT
= VCC – 2.0 V.
Table 2. NB7L216 POWER SUPPLY CONNECTIONS
3.3 V Setup 2.5 V Setup
VCC = 2.0 V VCC = 2.0 V
VTT = GND VTT = GND
VEE = −1.3 V VEE = −0.5 V
Step 2: Connect Inputs
For Differential Mode (3.3 V and 2.5 V operation)
2a: Connect the differential output of the generator to the
differential input of the device (D and D
).
For Single−Ended Mode (3.3 V operation only)
2a: Connect the AC coupled single−ended output
generator to input.
NOTE: Device may oscillate when the input is not
driven. For best results, unconnected input
should be terminated to V
TT
through 50 W
resistor.
OUT
OUT
TRIGGER
Channel 1 (80E01)
TRIGGER
Amplitude = 500 mV
Offset = 660 mV
Advantest D3186
Signal Generator
(12 GHz)
D
D
VCC = 2.0 V
V
CC
V
BB
Q
Q
Tektronix TDS8000
Digital Oscilloscope
V
EE
= −1.3 V (3.3 V op)
V
EE
= −0.5 V (2.5 V op)
VTT = 0 V
GND
VTT = 0 V
GND
Figure 2. NB7L216 Board Setup − Time Domain (Differential Mode)
NOTE: All differential cable pairs must be matched.
Channel 2 (80E01)
V
EE
V
BB
C1
C1
NB7L216MNEVB
http://onsemi.com
3
Setup (continued)
Step 3: Setup Input Signals
3a: Set the signal generator amplitude to 500 mV.
NOTE: The signal generator amplitude can vary from
75 mV to 900 mV to produce a 400 mV DUT
output.
3b: Set the signal generator offset to 660 mV (the center of
a nominal RSECL output).
NOTE: The V
CMR
(Voltage Common Mode Range)
allows the signal generator offset to vary as long
as crosspoint is within the V
CMR
range. Refer to
the device data sheet for further information.
3c: Set the generator output for a PRBS data signal, or for a
square wave clock signal with a 50% duty cycle.
Step 4: Connect Output Signals
4a: Connect the outputs of the device (Q, Q) to the
oscilloscope. The oscilloscope sampling head must have
internal 50 W termination to ground.
NOTE: Where a single output is being used, the
unconnected output for the pair must be
terminated to VTT through a 50 W resistor for
best operation. Unused pairs may be left
unconnected. Since V
TT
= 0 V, a standard 50 W
SMA termination is recommended.
OUT
OUT
TRIGGER
Channel 1 (80E01)
TRIGGER
Amplitude = 500 mV
Offset = 660 mV
Advantest D3186
Signal Generator
(12 GHz)
D
D
V
BB
Q
Q
Tektronix TDS8000
Digital Oscilloscope
V
EE
= −1.3 V (3.3 V op)
GND
VTT = 0 V
Channel 2 (80E01)
V
EE
V
BB
Figure 3. NB7L216 Board Setup − Time Domain (Single−Ended Mode)
AC Coupling
C1
C1
V
CC
= 2.0 V
V
CC
VTT = 0 V
GND
NOTE: All differential cable pairs must be
matched.
SETUP FOR FREQUENCY DOMAIN MEASUREMENTS
Table 3. BASIC EQUIPMENT
Description Example Equipment (Note 3) Qty.
Power Supply with 4 outputs HP 6624A 1
Vector Network Analyzer (VNA) R&S ZVK (10 MHz to 40 GHz) 1
180° Hybrid Coupler Krytar Model #4010180 1
Bias Tee with 50 W Resistor Termination
Picosecond Model #5542−219 1
Matched High Speed Cables with SMA Connectors Storm, Semflex 3
Power Supply Cables with Clips 3/4
3. Equipment used to generate example measurements within this document.
Loading...