NBSG111BAEVB
NBSG111 Evaluation Board
User's Manual
http://onsemi.com
EVAL BOARD USER’S MANUAL
Description
What measurements can you expect to make?
This document describes the NBSG111 evaluation board
and the appropriate lab test setups. It should be used in
conjunction with the NBSG111 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 NBSG111 GigaCommt 1:10 clock data
driver. The NBSG111 allows selection between two inputs
and fan out 10 identical differential outputs. The Reduced
Swing ECL (RSECL) output ensures minimal noise and fast
switching edges.
The evaluation board is implemented in two layers for
higher performance. For standard lab setup and test, a split
(dual) power supply is required enabling the 50
W
impedance from the scope to be used as termination of the
ECL signals (V
TT
= V
CC
– 2.0 V, in split power supply setup,
V
TT
is the system ground).
With this evaluation board, the following measurements
could be performed in single-ended (Note 1) or differential
modes of operation:
Jitter
Output Skew
Gain/Return Loss
Eye Pattern Generation
Frequency Performance
Output Rise and Fall Time
V
IHCMR
(Input High Common Mode Range)
1. Single-ended measurements can only be made at
V
CC
−
V
EE
= 3.3 V using this board setup.
Figure 1. NBSG111 Evaluation Board
1
Publication Order Number:
EVBUM2091/D
Semiconductor Components Industries, LLC, 2012
March, 2012
−
Rev. 1
NBSG111BAEVB
SETUP FOR TIME DOMAIN MEASUREMENTS
Table 1. BASIC EQUIPMENT
Description
Power Supply with 2 outputs
Oscilloscope
Differential Signal Generator
Matched high speed cables with SMA connectors
Power Supply cables with clips
2. Equipment used to generate example measurements within this document.
3. 50 GHz sample module used (for effective rise, fall and jitter performance measurement)
HP6624A
TDS8000 with 80E01 Sampling Head (Note 3)
HP 8133A, Advantest D3186
Storm, Semflex
Example Equipment
(Note 2)
Quantity
1
1
1
10
3
Setup
Step 1: Connect Power
Step 2: Connect Inputs
1a: Three power levels must be provided to the board for
V
CC
, V
EE
, and GND via the surface mount clips. Using the
split power supply mode, GND = V
TT
= V
CC
– 2.0 V.
Table 2. POWER SUPPLY CONNECTIONS
3.3 V Setup
V
CC
= 2.0 V
V
TT
= GND
V
EE
=
−1.3
V
2.5 V Setup
V
CC
= 2.0 V
V
TT
= GND
V
EE
=
−0.5
V
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 (CLK0 and CLK0).
For Single−Ended Mode (3.3 V operation only)
2a: Connect the AC coupled single-ended output generator
to input.
NOTE: For best results, unconnected input should be terminated to
V
TT
through 50
W
resistor.
V
CC
V
CC
= 2.0 V
Signal Generator
V
CC
CLK0
OUT
Float
V
TT
= 0 V
SEL
Channel 1
Channel 2
SEL
GND
Channel 3
Q0
Channel 4
Digital Oscilloscope
Q0
OUT
Amplitude = 500 mV
Offset = 660 mV
TRIGGER
V
EE
=
−1.3
V (3.3 V op)
−or−
V
EE
=
−0.5
V (2.5 V op)
NOTE:
V
TT
= 0 V
V
CC
Float
CLK0
V
EE
Q9
EN
EN
GND
Q9
Channel 5
Channel 6
Channel 7
Channel 8
TRIGGER
* Q0
−
Q9 Ouputs
All differential cable pairs
must be
matched.
Due to simplification of the block diagram CLK1/CLK1
and Q1
−
Q8 connections are not shown.
Figure 2. NBSG111 Board Setup
−
Time Domain
(Differential Mode)
http://onsemi.com
2
NBSG111BAEVB
Setup (continued)
Step 3: Setup Input Signals
Step 4: Connect Output 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.
4a: Connect the outputs of the device (Q0, Q1,
)
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 V
TT
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.
3b: Set the signal generator offset to 660 mV (the center of
a nominal RSECL PECL output).
NOTE: The V
IHCMR
(Input High Voltage Common Mode Range)
allows the signal generator offset to vary as long as V
IH
is
within the V
IHCMR
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.
V
CC
V
CC
= 2.0 V
Signal Generator
V
CC
AC_Coupling
OUT
Q0
OUT
Amplitude = 500 mV
Offset = 660 mV
TRIGGER
V
EE
=
−1.3
V (3.3 V op)
V
CC
NOTE:
V
TT
= 0 V
Float
50
W
CLK0
V
EE
Digital Oscilloscope
CLK0
Float
V
TT
= 0 V
SEL
Channel 1
Channel 2
SEL
GND
Channel 3
Q0
Channel 4
Q9
EN
EN
GND
Q9
Channel 5
Channel 6
Channel 7
Channel 8
TRIGGER
* Q0
−
Q9 Outputs
All differential cable pairs
must be
matched.
Due to simplifcation of the block diagram CLK1/CLK1
and Q1
−
Q8 connections are not shown.
Figure 3. NBSG111 Board Setup
−
Time Domain
(Single-ended Mode)
http://onsemi.com
3
NBSG111BAEVB
SETUP FOR FREQUENCY DOMAIN MEASUREMENTS
Table 3. Basic Equipment
Description
Power Supply with 2 outputs
Vector Network Analyzer (VNA)
180 Hybrid Coupler
Bias Tee with 50
W
Resistor Termination
Matched high speed cables with SMA connectors
Power Supply cables with clips
4. Equipment used to generate example measurements.
HP 6624A
R&S ZVK (10 MHz to 40 GHz)
Krytar Model #4010180
Picosecond Model #5542−219
Storm, Semflex
Example Equipment
(Note 4)
Quantity
1
1
1
1
3
3
Setup
Step 1: Connect Power
Setup Test Configurations for Differential Operation
A) Small Signal Setup
Step 2: Input Setup
1a: Three power levels must be provided to the board for
V
CC
, V
EE
, and GND via the surface mount clips. Using the
split power supply mode, GND = V
TT
= V
CC
– 2.0 V.
Table 4. POWER SUPPLY CONNECTIONS
3.3 V Setup
V
CC
= 2.0 V
V
TT
= GND
V
EE
=
−1.3
V
2.5 V Setup
V
CC
= 2.0 V
V
TT
= GND
V
EE
=
−0.5
V
2a: Calibrate VNA from 1.0 GHz to 12 GHz.
2b: Set input level to –35 dBm at the output of the 180
Hybrid coupler (input of the DUT).
Step 3: Output Setup
3a: Set display to measure S21 and record data.
B) Large Signal Setup
Step 2: Input Setup
NOTE: For frequency domain measurements, 2.5 V power supply is
not recommended because additional equipment (bias tee,
etc.) is needed for proper operation. The input signal has to
be properly offset to meet V
IHCMR
range of the device
.
2a: Calibrate VNA from 1.0 GHz to 12 GHz.
2b: Set input levels to
−2.0
dBm (500 mV) at the input of
DUT.
Step 3: Output Setup
3a: Set display to measure S21 and record data.
PORT 1
GND
50
W
V
CC
CLK0
1805 Hybrid
Coupler
Vector Network Analyzer
V
CC
= 2.0 V
V
CC
Float
V
TT
= 0 V
SEL
GND
50
W
Bias T
Q0
PORT 2
SEL
GND
Q0
50
W
GND
50
W
GND
50
W
GND
* Q0
−
Q9 Outputs
NOTE:
All differential cable pairs
must be
matched.
Due to simplifcation of the
block diagram CLK1/CLK1
and Q1
−
Q8 connections
are not shown.
CLK0
V
EE
Q9
EN
EN
GND
Q9
V
EE
=
−1.3
V
(3.3 V op)
V
TT
= 0 V
V
CC
Float
Figure 4. NBSG111 Board Setup – Frequency Domain (Differential Mode)
http://onsemi.com
4
NBSG111BAEVB
Setup Test Configurations for Single-ended
Operation
A) Single-ended Mode
−
Small Signal
Step 2: Input Setup
B) Single-ended Mode
−
Large Signal
Step 2: Input Setup
2a: Calibrate VNA from 1.0 GHz to 12 GHz.
2b: Set input level to –35 dBm at the input of DUT.
Step 3: Output Setup
2a: Calibrate VNA from 1.0 GHz to 12 GHz.
2b: Set input levels to +2 dBm (500 mV) at the input of DUT.
Step 3: Output Setup
3a: Set display to measure S21 and record data.
3a: Set display to measure S21 and record data.
Vector Network Analyzer
PORT 1
V
CC
Float
GND
V
CC
= 2.0 V
V
TT
= 0 V
SEL
50
W
Bias T
Q0
PORT 2
V
CC
CLK0
SEL
GND
Q0
50
W
GND
50
W
GND
50
W
GND
50
W
GND
CLK0
V
EE
Q9
EN
EN
GND
Q9
V
EE
=
−1.3
V (3.3 V op)
V
TT
= 0 V
V
CC
NOTE:
Float
* Q0
−
Q9 Outputs
All differential cable pairs
must be
matched.
Due to simplifcation of the block diagram CLK1/CLK1
and Q1
−
Q8 connections are not shown.
Figure 5. NBSG111 Board Setup – Frequency Domain
(Single-ended Mode)
http://onsemi.com
5
京公网安备 11010802033920号
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved
电子工程世界
