ON Semiconductor NB7L14MMNEVB User manual

©Semiconductor Components Industries, LLC, 2012
February, 2012 −Rev. 2
1Publication Order Number:
EVBUM2084/D
NB7L14MMNEVB
NB7L14M Evaluation Board
User's Manual
Description
This document describes the NB7L14M evaluation board
and the appropriate lab test setups. It should be used in
conjunction with the NB7L14M 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 NB7L14M GigaCommtclock/data
receiver/driver/translator device. The NB7L14M is
designed to support the distribution of clock/data signals at
high operating frequencies and produces four equal
differential clock/data outputs from a single input
clock/data. The Current Mode Logic (CML) output ensures
minimal noise and fast switching edges.
The evaluation board is implemented in two layers for
higher performance.
Board Lay−up
The board is implemented in two layers and provides a
high bandwidth 50 Wcontrolled impedance environment for
higher performance. The 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 the
NB7L14M device to the sense output. The second layer is
32 mils thick copper ground plane.
What measurements can you expect to make?
With this evaluation board, the following measurements
could be performed in single−ended or differential modes of
operation:
•Jitter
•Gain/Return Loss
•Eye Pattern Generation
•Frequency Performance
•Output Rise and Fall Time
•VCMR (Common Mode Range)
This Evaluation Board User’s Manual Contains:
•Information on NB7L14MMNEVB Evaluation Board
•Appropriate Lab Setup
•Bill of Materials
Figure 1. NB7L14M Evaluation Board
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EVAL BOARD USER’S MANUAL

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SETUP FOR TIME DOMAIN MEASUREMENTS
Table 1. BASIC EQUIPMENT
Description Example Equipment (Note 1) Qty.
Power Supply with 2 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 10
Power Supply cables with clips 4
1. Equipment used to generate example measurements within this document.
2. 50 GHz sample module 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
VCC, VEE, and GND via the surface mount clips.
Table 2. POWER SUPPLY CONNECTIONS
3.3 V Setup 2.5 V Setup
VCC = 0 V VCC = 0 V
GND = 0 V GND = 0 V
VEE = −3.3 V VEE = −2.5 V
Step 2: Connect Inputs
For Differential Mode
2a: Connect the differential output of the generator to the
differential input of the device (CLK and CLK).
OUT
Channel 1
Channel 2
OUT
TRIGGER
Channel 3
Channel 4
TRIGGER
Amplitude = 400 mV
Offset = −200 mV
Signal Generator
CLK
CLK
VCC = 0 V
VCC
VEE
Q2
Q1
Q1
Q2 Digital Oscilloscope
VEE = −3.3 V (3.3 V op)
−or−
VEE = −2.5 V (2.5 V op)
GND = 0 V
GND
GND = 0 V
GND
Figure 2. NB7L14M Board Setup −Time Domain
(Differential Mode)
NOTE: All differential cable pairs must be matched.
Channel 8
Channel 7
Channel 6
Channel 5
Q3
Q0Q0
Q3

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Setup (continued)
Step 3: Setup Input Signals
3a: Set the signal generator amplitude to 400 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 −200 mV (the center of
a nominal NCML output).
NOTE: The VCMR (Voltage Common Mode Range)
allows the signal generator offset to vary as long
as VTH is within the VCMR 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 (Q0, Q1, …) to the
oscilloscope. The oscilloscope sampling head must have
internal 50 Wtermination to ground.
NOTE: Where a single output is being used, the
unconnected output for the pair must be
terminated to VCC = GND through a 50 W
resistor for best operation. Unused pairs may be
left unconnected. Since VCC = GND, a standard
50 WSMA termination is recommended.

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MORE INFORMATION ABOUT EVALUATION BOARD
Design Considerations for >10 GHz operation
While the NB7L14M is specified to operate at 10 GHz,
this evaluation board is designed to support operating
frequencies up to 20 GHz.
The following considerations played a key role to ensure
this evaluation board achieves high−end microwave
performance:
•Optimal SMA connector launch
•Minimal insertion loss and signal dispersion
•Accurate Transmission line matching (50 ohms)
•Distributed effects while bypassing and noise filtering
Q0
Q1
Q3
1
Q3
VCC
OPEN CIRCUIT STUB
OPEN CIRCUIT STUB
NB7L14M
NOTE: C1 = Decoupling cap (broadband cap with the range from 2 MHz to 30 GHz)
Tx = 50 WTransmission line
VEE
CLK
CLK
VTCLK
VTCLK
Q0
Q1
T1
T2
T3T4 T5
T2
T2
T2
1
1
1
1
1
1T1
T5
0
0
C1
C1
T6
T6
l/2 @ 10 GHz l/2 @ 10 GHz
l/4 @ 10 GHz
SURFACE MOUNT CLIP
SURFACE MOUNT CLIP
0
ROSENBERGER SMA
ROSENBERGER SMA
ROSENBERGER SMA
ROSENBERGER SMA
ROSENBERGER SMA
ROSENBERGER SMA
Figure 3. Evaluation Board Schematic
0
Q2
Q2
T2
T2
T2
T2
1
1
1
ROSENBERGER SMA
ROSENBERGER SMA
ROSENBERGER SMA
ROSENBERGER SMA

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Table 3. BILL OF MATERIALS
Part No. Qty. Description Manufacturer WEB Address
NB7L14M 1 2.5V/3.3V SiGe Differential 1:4 Clock/Data
Driver with CML Outputs and Internal
Termination
ON Semiconductor http://www.onsemi.com
32K243−40ME3 10 Gold plated connector Rosenberger http://www.rosenberger.de
CO6BLBB2X5UX or
C0603C104K4RAC
42 MHz – 30 GHz capacitor
0603 0.1 mF $10%
Dielectric Laboratories
Kemet*
http://www.dilabs.com
www.newark.com
5016 4 Test Point −Anvil Keystone*
*Components are available through most distributors, i.e. www.newark.com or www.digikey.com.
Table 4. BOARD MATERIAL
Material Thickness
Rogers 6002 5.0 mil
Copper Plating 32 mil
Figure 4. Board Stack−up
12.5 mil
Dielectric (5.0 mil)
Thick Copper Base
1.37 mil
Figure 5. Layout Mask for NB7L14M
Figure 6. Insertion Loss
5 dB
START 1 GHz STOP 12 GHz1 GHz/
11 GHz
NOTE: The insertion loss curve can be used to calibrate out board loss if testing
under small signal conditions.
1 dB/div
Pin 1

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ADDITIONAL EVALUATION BOARD INFORMATION
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In all cases, the most up−to−date information can be found
on our website.
•Sample orders for devices and boards
•New Product updates
•Literature download/order
•IBIS and Spice models
References
NB7L14M/D, Data Sheet.
AND8077/D, Application Note, GigaCommt(SiGe)
SPICE Modeling Kit.
AND8075/D, Application Note, Board Mounting
Considerations for the FCBGA Packages.
ORDERING INFORMATION
Device Package Shipping†
NB7L14MMN QFN−16 123 Units/Rail
NB7L14MMNG QFN−16
(Pb−Free)
123 Units/Rail
NB7L14MMNR2 QFN−16 3000 Tape & Reel
NB7L14MMNR2G QFN−16
(Pb−Free)
3000 Tape & Reel
NB7L14MMNEVB N/A N/A

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PACKAGE DIMENSIONS
16 PIN QFN
CASE 485G−01
ISSUE C
16X
SEATING
PLANE
L
D
E
0.15 C
A
A1
e
D2
E2
b
1
4
58
12
9
16 13
NOTES:
1. DIMENSIONING AND TOLERANCING PER
ASME Y14.5M, 1994.
2. CONTROLLING DIMENSION: MILLIMETERS.
3. DIMENSION b APPLIES TO PLATED
TERMINAL AND IS MEASURED BETWEEN
0.25 AND 0.30 MM FROM TERMINAL.
4. COPLANARITY APPLIES TO THE EXPOSED
PAD AS WELL AS THE TERMINALS.
5. Lmax CONDITION CAN NOT VIOLATE 0.2 MM
MINIMUM SPACING BETWEEN LEAD TIP
AND FLAG
ÇÇÇ
ÇÇÇ
B
A
0.15 C
TOP VIEW
SIDE VIEW
BOTTOM VIEW
PIN 1
LOCATION
0.10 C
0.08 C
(A3)
C
16 X
e
16X
NOTE 5
0.10 C
0.05 C
A B
NOTE 3
K
16X
DIM MIN MAX
MILLIMETERS
A0.80 1.00
A1 0.00 0.05
A3 0.20 REF
b0.18 0.30
D3.00 BSC
D2 1.65 1.85
E3.00 BSC
E2 1.65 1.85
e0.50 BSC
K
L0.30 0.50
EXPOSED PAD
0.18 TYP
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