ON Semiconductor NBSG16VSBAEVB User manual
Semiconductor Components Industries, LLC, 2003
March, 2003 - Rev. 0 1Publication Order Number:
NBSG16BAEVB/D
NBSG16BAEVB,
NBSG16VSBAEVB
Evaluation Board Manual
for NBSG16 and NBSG16VS
DESCRIPTION
This document describes the NBSG16/16VS evaluation
board and the appropriate lab test setups. It should be used
in conjunction with the NBSG16/16VS data sheets which
contain full technical details on the device specifications and
operation. The same PCB is used to evaluate both devices.
The evaluation board is designed to facilitate a quick
evaluation of the NBSG16/16VS GigaCommDifferential
Receiver/Driver. The NBSG16 is designed to function as a
high speed receiver/driver device with a reduced output
swing capability suitable for use in high speed signal
amplification and backplane interface applications. The
Reduced Swing ECL (RSECL) output ensures minimal
noise and fast switching edges. The NBSG16VS has the
option to vary the output amplitude swing (additional
VCTRL modulation pin, labeled VS on evaluation board).
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 ohm
impedance in the scope to be used as termination of the ECL
signals (VTT= VCC – 2.0 V, in split power supply setup, VTT
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
•VIHCMR (Input High Common Mode Range)
1. Single- ended measurements can only be made at
VCC - VEE = 3.3 V using this board setup.
Figure 1. NBSG16/16VS Evaluation Board
EVALUATION BOARD MANUAL
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NBSG16BAEVB, NBSG16VSBAEVB
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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 (Note 3)
1. Equipment used to generate example measurements within this document.
2. 50 GHz sampling head used (for effective rise, fall and jitter performance measurement)
3. An additional power supply cable with a surface mount clip is necessary to test the NBSG16VS due to the
VCTRL connection.
Setup
Connect Power
Step 1: 1a: Three power levels must be provided to the board for VCC, VEE, and GND via the surface
mount clips. Using the split power supply mode, GND = VTT = VCC – 2.0 V.
NBSG16/16VS Power Supply Connections
3.3 V Setup 2.5 V Setup
VCC = 2.0 V (Two Places) VCC = 2.0 V (Two Places)
VTT = GND (One Place) VTT = GND (One Place)
VEE = -1.3 V (One Place) VEE = -0.5 V (One Place)
NBS/16VS Only Power Supply Connection
3.3 V Setup 2.5 V Setup
VCTRL (One Place) VCTRL (One Place)
NOTE: For NBSG16VS only: Adjustable power supply is needed to modulate output amplitude by
varying VCTRL pin as shown in Figures 2 through 6. Connect the VCTRL (Output Amplitude
Swing Control) voltage level for the desired output swing. Refer to NBSG16VS data sheet
Figures 4 and 5.
Connect Inputs
Step 2: 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 VTT through 50 resistor
NBSG16BAEVB, NBSG16VSBAEVB
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3
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
VCC
VBB
Q
Q
Tektronix TDS8000
Digital Oscilloscope
VEE = -1.3 V (3.3 V op)
VEE = -0.5 V (2.5 V op)
VTT = 0 V
GND
VTT = 0 V
GND
Figure 2. NBSG16/16VS Board Setup - Time Domain (Differential Mode)
NOTE: All differential cable pairs
must be
matched.
WARNING: VCTRL
must not
be connected for NBSG16 evaluation board connection or damage may result
Channel 2 (80E01)
VEE
VBB
C1
C1
VCTRL NBSG16VS
ONLY
C2
Setup (continued)
Setup Input Signals
Step 3: 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 VIHCMR (Input High Voltage Common Mode Range) allows the signal generator offset to
vary as long as VIH is within the VIHCMR 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.
Connect Output Signals
Step 4: 4a: Connect the outputs of the device (Q, Q) to the oscilloscope. The oscilloscope
sampling head must have internal 50 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 resistor for best operation. Unused pairs may be left unconnected. Since
VTT = 0 V, a standard 50 SMA termination is recommended.
NBSG16BAEVB, NBSG16VSBAEVB
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4
OUT
OUT
TRIGGER
Channel 1 (80E01)
TRIGGER
Amplitude = 500 mV
Offset = 660 mV
Advantest D3186
Signal Generator
(12 GHz)
D
D
VBB
Q
Q
Tektronix TDS8000
Digital Oscilloscope
VEE = -1.3 V (3.3 V op)
GND
VTT = 0 V
Channel 2 (80E01)
VEE
VBB
Figure 3. NBSG16/16VS Board Setup - Time Domain (Single-Ended Mode)
AC Coupling C1
C1
VCC = 2.0 V
VCC
VTT = 0 V
GND
VCTRL NBSG16VS
ONLY
C2
NOTE: All differential cable pairs
must be
matched.
Setup for Frequency Domain Measurements
Table 2. Basic Equipment
Description Example Equipment (Note 4) 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 Resistor Termination Picosecond Model #5542-219 1
Matched High Speed Cables with SMA Connectors Storm, Semflex 3
Power Supply Cables with Clips 3/4 (Note 5)
4. Equipment used to generate example measurements within this document.
5. An additional power supply cable with a surface mount clip is necessary to test the NBSG16VS due to the
VCTRL connection.
NBSG16BAEVB, NBSG16VSBAEVB
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5
Setup
Connect Power
Step 1: 1a:Three power levels must be provided to the board for VCC, VEE, and GND via the sur-
face mount clips. Using the split power supply mode, GND = VTT = VCC – 2.0 V.
NBSG16/16VS Power Supply Connections
3.3 V Setup
VCC = 2.0 V (Two Places)
VTT = GND (One Place)
VEE = -1.3 V (One Place)
NBS/16VS Only Power Supply Connection
3.3 V Setup
VCTRL (One Place)
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 VIHCMR range of the device.
NBSG16BAEVB, NBSG16VSBAEVB
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Setup Test Configurations For Differential Operation
Small Signal Setup
Step 2:
Input Setup
2a: Calibrate VNA from 1 0 GHz to 12 GHz
Step
2
:
2
a:
C
a
lib
rate
VNA
f
rom
1
.
0
GH
z to
12
GH
z.
2b: Set input level to –35 dBm at the output of the 180°Hybrid coupler (input of the DUT).
Step 3:
Output Setup
Step 3:
O
u
tp
u
t
Set
u
p
3a: Set display to measure S21 and record data.
Large Signal Setup
Step 2:
Input Setup
2a: Calibrate VNA from 1 0 GHz to 12 GHz
Step
2
:
2
a:
C
a
lib
rate
VNA
f
rom
1
.
0
GH
z to
12
GH
z.
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.
D
D
VBB
Q
Q
VEE = -1.3 V (3.3 V op)
GND
VTT = 0 V
VEE
VBB
Rohde & Schwartz
Vector Network Analyzer
Figure 4. NBSG16/16VS Board Setup – Frequency Domain (Differential Mode)
50
180 Hybrid
Coupler
GND
Bias T
50
GND
PORT 2PORT 1
GND
50
C1
C1
VCC = 2.0 V
VCC
VTT = 0 V
GND
VCTRL NBSG16VS
ONLY
C2
NBSG16BAEVB, NBSG16VSBAEVB
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Setup Test Configurations For Single-Ended Operation
Single-Ended Mode – Small 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
3a: Set display to measure S21 and record data.
Single-Ended Mode – Large Signal
Step 2: Input 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.
Figure 5. NBSG16/16VS Board Setup – Frequency Domain (Single-Ended Mode)
50
GND
D
D
VBB
Q
Q
VEE = -1.3 V (3.3 V op)
GND
VTT = 0 V
VEE
VBB
Rohde & Schwartz
Vector Network Analyzer
Bias T
50
GND
PORT 2PORT 1
GND
50
C1
C1
VCC = 2.0 V
VCC
VTT = 0 V
GND
VCTRL NBSG16VS
ONLY
C2
NBSG16BAEVB, NBSG16VSBAEVB
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8
More Information About Evaluation Board
Design Considerations for >10 GHz operation
While the NBSG16/16VS is specified to operate at
12 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
VCC
OPEN CIRCUIT STUB
OPEN CIRCUIT STUB
NBSG16/16VS
NOTE: C1, C2* = Decoupling cap
Tx = 50 Transmission line
*NBSG16VS only
VEE
CLK
CLK
VTCLK
VTCLK
Q0
T1
T3
T4 T5
T2
T2
1
1
1
1T1
T5
0
0
C1
C1
T6
T6
/2 @ 10 GHz
/2 @ 10 GHz
/4 @ 10 GHz
SURFACE MOUNT CLIP
SURFACE MOUNT CLIP
0
ROSENBERGER SMA
ROSENBERGER SMA
ROSENBERGER SMA
ROSENBERGER SMA
Figure 6. Evaluation Board Schematic
0
/4 @ 10 GHz
VBB
VCTRL
C2
NBSG16VS
ONLY
NBSG16BAEVB, NBSG16VSBAEVB
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Table 3. Parts List
Part No Description Manufacturer WEB address
NBSG16BA 2.5V/3.3V SiGe Differential Receiver/Driver
with RSECL Outputs ON Semiconductor http://www.onsemi.com/NBSG16
NBSG16VS 2.5V/3.3V SiGe Differential Receiver/Driver with
Variable Output Swing ON Semiconductor http://www.onsemi.com/NBSG16VS
32K243-40ME3 Gold plated connector Rosenberger http://www.rosenberger.de
CO6BLBB2X5UX 2 MHz – 30 GHz capacitor Dielectric Laboratories http://www.dilabs.com
Table 4. Board Material
Material Thickness
Rogers 6002 5 mil
Copper Plating 32 mil
Figure 7. Board Stack-up
12.5 mil
Dielectric (5.0 mil)
Thick Copper Base
1.37 mil
Figure 8. Layout Mask for NBSG16/16VS
Figure 9. Insertion Loss
PIN 1
NOTE: The insertion loss curve can be used to calibrate out board loss if testing
under small signal conditions.
5 dB
START 1 GHz STOP 12 GHz1 GHz/
11 GHz
H
1 dB/div
NBSG16BAEVB, NBSG16VSBAEVB
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EXAMPLE MEASUREMENTS IN FREQUENCY DOMAIN (VCC – VEE = 3.3 Volts)
20
25
30
35
40
-40 -20 0 20 40 60 80
2.5 V
3.3 V
TEMPERATURE (°C)
TIME (ps)
20
25
30
35
40
-40 -20 0 20 40 60 80
2.5 V
3.3 V
TEMPERATURE (°C)
TIME (ps)
Figure 10. Fmax - Amplitude vs. Frequency
(NBSG16: VCC - VEE = 3.3 V @ 25C) Figure 11. NBSG16 Trvs. Temperature and
Supply Voltage
Figure 12. NBSG16 Tfvs. Temperature and Supply Voltage
Figure 13. NBSG16: Eye Diagram at 10 Gbps with PRBS 2^31-1
(total Pk-Pk system jitter including the signal generator is 15 ps)
0
100
200
300
400
500
600
123456789101112
OUTPUT AMPLITUDE (mV)
13 14
FREQUENCY (GHz)
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