( and hdo8000 series oscilloscopes )...motor drive input/output (ac line input, dc bus, drive...
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MDA800 Motor Drive Analyzer MDA800 Motor Drive Analyzer ( and HDO8000 Series Oscilloscopes )( and HDO8000 Series Oscilloscopes )
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MDA800 – Motor Drive Analyzer Complete Motor Drive System Debug and Validation Three-Phase Power Measurements ( Real , Apparent and Reactive)Efficiency Measurements Per-Cycle Time-Correlated Waveforms From Power ValuesDynamic Drive response Analysis, from Startup to Overload Complete Motor Integration ( Torque, Speed, Position )User-Configurable Power Table and Graphical User Interface Unique Zoom+Gate Mode
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MDA support the complete design and debug challenge for the motor drive engineer
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Power Section Measurements
Line inputPWM outputEfficiencies
Motor IntegrationTorqueSpeedPositionPower
Embedded Control Debug
AnalogDigitalSerial DataControl LoopPWM
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Motor Drive Analyzers – Unique Positioning
General-purpose 8 ch, 12-bit scopes up to 1 GHz plus 32 Digital Channels Motor Drive Analyzers perform
Static (steady-state) “mean value”tables, like a power analyzerDynamic (transient) analysisComplete embedded control debug (i.e. it is a fully-functional oscilloscope)
High SR, BW, MemoryMixed Signal Serial Trigger & Decode
More complete motor integration
10/2/14Teledyne LeCroy Company Confidential
General-purpose Oscilloscope(BW, SR, Memory, MSO, Serial Trigger/Decode,
IGBT/MOSFET Device Test)
Mot
or In
tegr
atio
n
Torq
ue, S
peed
, Pow
er
3-phase Power
Analysis
(Channels, Resolution)
Teledyne LeCroyMotor Drive Analyzer8ch, 12-bit
It’s an Oscilloscope, and it’s also a Power Analyzer with Motor Integration
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Introducing the Teledyne LeCroy HDO8000 Oscilloscope8 analog input channels , Mixed-signal (MSO) option 16 Ch
Ideal for high power and three-phase power electronics analysisVery useful for deeply embedded electronic/mechatronic systems
Highest Accuracy 12-bit HD4096 High Definition Technology
“16x closer to perfect”
Comprehensive availability of ProbingActive/passiveHigh voltage differential (1000Vrms)CurrentDifferential amplifiers
Connect up to 8 current probes at one time
Serial Trigger/Decode 19 different low-speed serial trigger/decode solutions available
Faster Up to 1 GHz
Bandwidth for today’s and tomorrow’s technologies
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Support for WQXGA (3840x2160 pixels) Extended Desktop
Add a larger touch-screen display to the HDO8000
View a 3rd party program (e.g. MATLAB) on the oscilloscope displayLocate oscilloscope near DUT and the larger display farther away
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HDO8000 Oscilloscope - Powerful AnalyticsMost powerful motherboard in its class
Intel® CoreTM i5-4670s Quad (core)2.9 GHz (per core)up to 32 GB of RAM
Long acquisition memory50 Mpts/ch standard, up to 250 Mpts/ch optionalIdeal for several seconds of data capture
More WaveformsUp to 40 total, displayable12 Math, 12 Zoom, 12 Memory waveforms
Modern, oscilloscope user-interfaceTeledyne LeCroy’s MAUI scope operating software running on Windows 7 OSSupports 3rd party software (e.g. MATLAB) running on scope
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What is a Motor Drive Analyzer?
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It is a new model series (MDA8xx)It is built on the HDO8000 platformAll MDA specifications are same as HDO8000 of equivalent bandwidthAll MDA800 available options, accessories, and probes are the same as HDO8000
It contains the “Motor Drive Power Analyzer” firmware capabilities
It contains advanced X-Y capabilityThis capability is not available on HDO8000
It has MDA-specific bezel buttons
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Motor Drive Analyzer Graphical User Interface
Simple , Intuitive user interface
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Numerics Table for short record
power analysis, like a Power Analyzer
Long Record Dynamic Analysis toolsets that Power
Analyzers don’t have
Most Complete Mechanical Motor
Integration
Intuitive Wiring Configuration Setup
Diagrams“This is much nicer
than a power analyzer”
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Powerful Analysis : Brushless DC Power Tool
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MDA800 Motor Drive Analyzer Value PropositionStatic
It can calculate three-phase power and motor mechanical torque/speed values for short record, static (steady-state) operating conditions.
DynamicIt can capture long record, dynamic operating events and contains advanced tools for per-cycle analysis and correlation to other events. Unique capabilities !
CompleteIt’s an 8-channel (+16 digital), high definition (12-bit) oscilloscope that can perform complex debug of the embedded control systemMDO800 can debug anything in the full drive system:
Motor (mechanical) measurementsMotor Drive input/output (AC Line Input, DC Bus, Drive Output) measurementsInverter subsection characterization and debug (e.g. power semiconductor device loss/operation, switching problems)Embedded control system debugAll of the above working together as a complete Drive System
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MDA800 Motor Drive Analyzer Value Proposition - Summary
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Capability Teledyne LeCroy MDA800 Motor Drive Analyzer
StaticPower Analysis
YesShort records.Constant load/speed.Numerics value table.
DynamicPower Analysis
YesLong time durationsVariable loads/speeds.Statistics Table.Per-cycle Waveforms.
Complete Test Capability
YesMixed Signal (MSO).Serial Trigger & Decode.Oscilloscope Tools.Probes & Accessories.
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MDA - Overall Hardware Summary
13
Teledyne LeCroy MDA800 Motor Drive Analyzer
Inputs 8 analog, +16 digital (optional)
Resolution 12-bits
Bandwidth 350 MHz - 1 GHz
Sample Rate 2.5 GS/s
Memory 50 Mpts/Ch standard250 Mpts/Ch maximum
Specified Power Measurement Accuracy
~1% voltage/current~1% power
(typical expected, using probes)
Probe Integration Complete
HV Isolation Yes, 1000Vrms(using HVD Series voltage probes)
Filtering Yes (ERES)(software post-processing)
10/2/14Teledyne LeCroy Company Confidential
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MDA : Overall CapabilityFor complete drive system debug and validation – power + control + motor
14
Teledyne LeCroy HDO8038 + Motor Drive Power Analyzer SW
Embedded Control Debug and Validation (Analog, Digital, Serial Data trigger and capture)
Yes
Power Semiconductor Device Analysis (Device Losses, RDS ON, etc.) Yes
(with PWR option, suitable probes, optional)
Power System (Inverter) Analysis Toolset3-phase power, voltage, current measurements and waveforms Yes
Motor IntegrationSpeed and Torque sensors Yes
10/2/14Teledyne LeCroy Company Confidential
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MDA : 3-phase Power and Motor InterfaceFeature Set and Capability Comparison
Capability
“Static”Power Analysis (Numeric table)
Numeric Values + Table Yes
Each Phase and Σ3-ph values Yes
Line-Line to Line-Neutral Conversion
Yes (standard)
Efficiency Calculations Yes
Per-cycle Values Yes
“Dynamic”Power Analysis
Per Cycle V, I, PWR Waveforms Yes
Per-cycle Values and Statistics Yes
Harmonics Drive Input/Output Harmonics Planned
Motor IntegrationTorque Yes
Speed, Direction, Position Yes (standard, comprehensive)
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MDA and HDO8000 oscilloscope : Capabilities Comparison
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High Bandwidth and Long Acquisition Memory are High Bandwidth and Long Acquisition Memory are Important in the Motor Drive AnalyzerImportant in the Motor Drive Analyzer
for Device Characterization and Embedded Control System Test
Back to Beginning
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High Bandwidth is Important in the Motor Drive Analyzerfor Device Characterization and Embedded Control System Test
IGBT/MOSFET CharacterizationCurrent silicon (Si) devices have rise times of ~30 ns
~100 MHz requiredNext-generation silicon-carbide (SiC) or gallium-nitride (GaN) deployed with faster rise times
~500 MHz to 1 GHz oscilloscope bandwidth desired
1ns device rise timePerhaps 5ns as designed into a drive
Control Microprocessor Speed Can Range up to 700 MHz
e.g. Vector FOC controlsUp to 1 GHz oscilloscope bandwidth required
MDA 350MHz, 500 MHz and 1 GHz
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Long Acquisition Memory is Useful in the Motor Drive AnalyzerFor dynamic capture and analysis under changing loads, speeds, and control conditions
Dynamic Response DebugStart-up to Steady-State, or vice-a-versaRapidly changing load conditions
Debug of Control and/or Gate-drive Problems (high frequency) to Power Cycle (low frequency) behaviors
MDA long memory (100Mpt/Ch–L) and (250Mpt/Ch–XL) options
Std. 50 Mpt/Ch Very high value
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Motor Drive Analizer Motor Drive Analizer -- MDAMDASoftware Capability OverviewSoftware Capability Overview
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Motor Drive Analysis Setup Dialog OverviewPush “Drive Setup” button or Select “Motor Analysis” from Analysis pull-down
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Multi-tab structure, like SDAIII
Wiring diagram and channel assignments –
1 for each power section
Mechanical (torque and speed) selections and channel assignments
3-phase Power and Motor Measurements numerics
table setupPer-cycle “synthesized”
Waveforms and Statistics
Combined iconic setup indication and shortcut button to dialog/tab Setup summary
Shortcut buttons to dialog/tab
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AC Input Setup Dialog Overview
Wiring configuration
selection
AC Input Voltage and Current Assignments
Waveform period synchronization setup (for per-cycle measurement
analysis)
Enable Zoom+Gate –button and indicator (gray when “ON”)
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Wiring setup image changes dynamically with selected wiring configuration
L-L to L-N voltage conversion (when applicable, selectable individually for each power
section tab)
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DC Bus Setup Dialog Overview
Wiring configuration
selection
DC Bus Voltage and Current Assignments
Waveform period synchronization setup (for per-cycle measurement
analysis)
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Wiring setup image changes dynamically with selected wiring configuration
Enable Zoom+Gate –button and indicator (gray when “ON”)
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Drive Output Setup Dialog Overview
Wiring configuration
selection
Drive Output Voltage and Current Assignments
Harmonic Filter Setup
Waveform period synchronization setup (for per-cycle measurement
analysis)
L-L to L-N voltage conversion (when applicable, selectable individually for each power
section tab)
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Wiring setup image changes dynamically with selected wiring configuration
Enable Zoom+Gate –button and indicator (gray when “ON”)
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Wiring Configuration - SetupComplete wiring configuration selection, with L-L to L-N voltage conversion standard
Wiring configuration is user-selectable
We support the same 1-phase and 3-phase configurations
Line-Line (L-L) to Line-Neutral (L-N) conversion is a standard feature
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Intuitive, graphical UI makes for better understanding of required three-phase connections
“That’s nice !
Corresponding graphical setup image appears
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Intuitive 3-phase, 3-wire (3V3A) AssociationsVoltages and Currents Associate in an Intuitive Fashion
More intuitive line-line voltage and line current associationsVRS -› IRVST -› ISVTR -› IT
It’s easy to remember how to set up the wiring assignments
When acquired, L-L voltage and L-N currents “associate” in an expected way
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“Per Cycle” Measurement Technique for Power AnalysisThe selected Sync signal determines the measurement period
Take a long acquisitionOnly two cycles are shown, to the right, as an example
Detect the cyclical period, and “slice” the waveforms into these periods
We know how to do this – this is what we in serial data jitter analysis
In each “sliced” periodCalculate Real Power (P) as instantaneously V * I sampled data Calculate Apparent Power (S) as Vrms * Irmsfor each cyclical period“N” measurement values for “N” cyclical periods in each acquisitionSolve for Q, as before.
Calculate VDC, IDC, Ipeak, Vpeak, etc. as well on a per-cycle basis
one period
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Drive Output Harmonic FilterDrive PWM Output contains a lot of high frequency “harmonic” contentMotors are by nature LC filters – they filter this content outCapability to look at Numerics data with a filter applied at the outputThis is a line-line voltage probed example with a L-L to L-N conversion applied to the Numerics data
At fundamental only, Apparent Power and Reactive Power values are reduced, Power Factor goes up, and Phase Angle goes down (as expected)
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Zoom+Gate OperationPush “Zoom+Gate” button to create Zooms and Gate the Numerics table to zoomed area
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Original, Full Record Length
Acquisitions
Zooms
Displayed Sync
Signal is Zoomed
Per-cycle “synthesized”Waveforms are ZoomedAll table
data is calculated on zoomed area only
Zoomed Area in
Acquisition
Light Glows “ON” when in Zoom+Gate mode
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Mechanical Setup Dialog Overview
Torque Sensing Method
Selection
Speed & Angle setup changes depending on
Method selected
Rotation direction is arbitrary –
select one of these to get
correct sign of rotation
parameter
Waveform period synchronization setup (for per-cycle measurement
analysis)
Select the analog channel to use for Torque sensing input
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Enable Zoom+Gate –button and indicator (gray when “ON”)
Select Units, Filter Cutoff, and Scaling
Speed, Angle,
Direction Method
Selection
“Angle” is the arbitrary shaft rotation angle. “Offset
Angle” allows correction to something not arbitrary (e.g.
rotor field)
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Mechanical Setup – The Most Complete Motor Sensor IntegrationStandard with MDA – Teledyne LeCroy
Torque Load CellsAnalog and Digital Speed Sensors
Analog/Pulse Tachometer (speed)Hall Sensor (speed and direction)Resolver (speed and direction)Quadrature Encoder Interface (speed, direction, absolute position)
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Mechanical Setup – The Most Complete Motor Sensor Integration Speed x Torque = Mechanical Power, so complete sensor support is criticalSensor Type Sensing Capability Teledyne
LeCroyStandardCapability
Analog TachometerSpeed
Fully-supported.
Digital (Pulse) Tachometer
Fully-supported.
Hall Effect Sensors
Speed + Direction
Fully-supported. Commonly used in BLDC applications. Signals are digital, so MSOinputs can be used for sensing, preserving analog channels for other needs.
Resolver Fully-supported. Commonly used in Vector FOC motor drives where high-precision and reliability is required (e.g. hybrid/EV vehicle propulsion)
Quadrature Encoder Interface (QEI)
Speed + Direction + Absolute Position
Fully-supported. Commonly used in Vector FOC motor drives as it provides absoluteposition of rotor field. Engineers may debug with QEI even whenproduction drives use Resolvers.
Analog Load Cell Torque Fully-supported.
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Numeric Table Setup Dialog OverviewPush “Numerics” button to open setup dialog and/or display Numerics table
Check the box to display the
table
Table column (measurement) selections
are made hereMechanical Units Selection
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Table row (source) selections dynamically
change based on wiring configuration
Enable Zoom+Gate –button and indicator (gray when “ON”)
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Numeric Voltage, Current and Power Results Table
User-Configurable “Power” Results Table (up to 10 rows and 12 columns)
Selection of Rows and Columns Populates the Results TableProbe Line-Line (L-L) and Display Results in Line-Neutral (L-N)
Using L-L to L-N conversion
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Waveform (Voltage and Current) Acquisitionwith Numeric Voltage, Current and Power Results Table Shown
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Completely New for LeCroy!Displays the mean value of parameter for the complete acquisitionSingle table, easy to configure
Up to 10 rows x 12 columns120 measurements in one table
Inherently customizablePopulates as selections made
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Per-Cycle “Synthesized” Waveforms and StatisticsUnique Teledyne LeCroy features!
Time-correlated waveforms indicate drive system behavior over time Click on a Numeric table mean value
Get detailed statistics on all cycles in the Statistics table
Create a Waveform of the data over time
Mean valueMean valueStatistical Values
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Mean value
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Waveforms+Stats Setup Dialog OverviewPress Waveforms button to open setup dialog and/or display Waveforms + Statistics table
Check the box to display the
tableMeasurement
(Numerics table column)
Waveform Vertical Scale Settings – active
waveform can be adjusted
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Motor Parameter (MP) On/Off button and
indicator (gray color = “on”)
Enable Zoom+Gate –button and indicator (gray when “ON”)
Source (Numerics table row)
Waveform On/Off Checkbox
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Application 2: Brushless DC Power Tool AnalysisApplication 2: Brushless DC Power Tool Analysis
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Brushless DC Power Tool Analysis
10/2/14Teledyne LeCroy Company Confidential 39
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10/2/14Teledyne LeCroy Company Confidential 40
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10/2/14Teledyne LeCroy Company Confidential 41
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10/2/14Teledyne LeCroy Company Confidential 42
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10/2/14Teledyne LeCroy Company Confidential 43
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10/2/14Teledyne LeCroy Company Confidential 44
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10/2/14Teledyne LeCroy Company Confidential 45
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10/2/14Teledyne LeCroy Company Confidential 46
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10/2/14Teledyne LeCroy Company Confidential 47
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10/2/14Teledyne LeCroy Company Confidential 48
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10/2/14Teledyne LeCroy Company Confidential 49
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10/2/14Teledyne LeCroy Company Confidential 50
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10/2/14Teledyne LeCroy Company Confidential 51
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10/2/14Teledyne LeCroy Company Confidential 52
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10/2/14Teledyne LeCroy Company Confidential 53
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10/2/14Teledyne LeCroy Company Confidential 54
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10/2/14Teledyne LeCroy Company Confidential 55
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10/2/14Teledyne LeCroy Company Confidential 56
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Probing Requirements for Probing Requirements for Different Drive Voltage RatingsDifferent Drive Voltage Ratings
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Specifying Probes for Motor Drive Power Section MeasurementsKnowing the drive input/output ratings will help you understand what to offer
10/2/14Teledyne LeCroy Company Confidential 58
“Floating”Ground-
Referenced
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Drive “AC Line” Input Voltage Probing RequirementsAll Input VAC values in RMS
Input VAC/VRMS
# Phases
VPK-PK(line-line)
VPK(line-neutral)
Acceptable Probes (Quantity)
120 VAC 1 - 340 VPK PP018 (Qty. 1)†
HVP120 (Qty. 1) †
HVD3106 (Qty. 1)240 VAC 1 - 680 VPK
400 VAC 3 1131 VPK-PK 653 VPKHVD3106 (Qty. 3)
HVP120 probes could also be used but ONLY for line-neutral probing
480 VAC 3 1358 VPK-PK 784 VPK
600 VAC 3 1697 VPK-PK 979 VPK
690 VAC‡ 3 1952 VPK-PK 1127 VPK
10/2/14Teledyne LeCroy Company Confidential 59
† If using the PP018 or HVP120, the “neutral” must be at scope ground OR multiple probe grounds must be tied together and left to “float” (not the same as floating the scope)‡ Worst case input voltage for 600V class drive
The HVD3106 will provide the customer with the most probing flexibility AND provide fail-safe safety with signals that are not connected to ground
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Drive “AC Line” Input Current Probing RequirementsAll Input AAC values in RMS
Input CurrentAAC/ARMS
# Input Phases Probe (Quantity)
Up to 30 AAC 1 CP030 (50 MHz) (Qty. 1)Up to 30 AAC 3 CP030 (50 MHz) (Qty. 3)Up to 150 AAC 3 CP150 (Qty. 3)Up to 500 AAC 3 CP500 (Qty. 3)>500 AAC* 3 Current Shunt
Pearson Current TransformersDanisense Current TransducersPEM-UK Rogowski Coils
10/2/14Teledyne LeCroy Company Confidential 60
* These devices may not be DC-coupled. Therefore, an absolute DC reference may not be maintained and this may compromise power measurement accuracy
CP Series current probes cost more, but they do provide the DC reference that many customers want
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Drive DC Bus/Link Voltage Probing RequirementsAll Input VAC values in RMS
Input VAC/VRMS
# Phases DC Bus Voltage
Probe (Quantity)
Battery - ≤18 VDC HVD3106 (Qty. 1)PP018† or HVP120 could also be used in a battery-based system but only if the DC Bus on the DUT could be forced to earth (scope) ground. If you are not sure, use an HVD3106.
Battery - 36 VDC
Battery - 48 VDC
120 VAC 1 170 VDC
HVD3106 (Qty. 1)
240 VAC 1 340 VDC
400 VAC 3 566 VDC
480 VAC 3 679 VDC
600 VAC 3 849 VDC
690 VAC‡ 3 976 VDC
10/2/14Teledyne LeCroy Company Confidential 61
† PP018 is rated for 400VRMS‡ Worst case input voltage for 600V class drive
Included passive or optional HV passive probes are good values for DC bus probing in some cases, but HVD3106 can be used anywhere
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Drive Gate Drive PWM Signal Probing RequirementsAssuming gate drive voltage of 3-24VDC
10/2/14Teledyne LeCroy Company Confidential 62
* Quantity depends on how many simultaneous gate drive signals need to be monitored† Limited to 20V gate drive voltage
DC Bus Voltage
Gate Drive Voltage
Probe (Quantity)*
18 VDC Up to 12 VDCZD200† (Qty. N)HVD3106 (Qty. N)36 VDC Up to 12 VDC
48 VDC Up to 24 VDC
170 VDC Up to 24 VDC
HVD3106 (Qty. N)
340 VDC Up to 24 VDC
566 VDC Up to 24 VDC
679 VDC Up to 24 VDC
849 VDC Up to 24 VDC
976 VDC Up to 24 VDC
Due to floating voltages of gate drive, a differential probe with appropriate common-mode rating must be used
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Drive DC Bus/Link Current Probing RequirementsAll Input AAC values in RMS
Input Current Probe (Quantity)
Up to 30 AAC CP030 (50 MHz) (Qty. 1)
Up to 150 AAC CP150 (Qty. 1)
Up to 500 AAC CP500 (Qty. 1)
>500 AAC* Current ShuntPearson Current TransformersDanisense Current TransducersPEM-UK Rogowski Coils
10/2/14Teledyne LeCroy Company Confidential 63
* These devices may not be DC-coupled. Therefore, an absolute DC reference may not be maintained and this may compromise power measurement accuracy
CP Series current probes cost more, but they do provide the DC reference that many customers want
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Drive 3-phase Output Voltage Probing RequirementsAll Input VAC values in RMS
DC Bus Voltage
VPK-PK(line-line)
VPK(line-neutral)
Probe (Quantity)
18 VDC 36 VPK-PK 21 VPK HVD3106 (Qty. 3)HVP120 or PP018† could also be used, but ONLY for line-neutral probing with the three ground leads tied to each other (not to scope ground) and therefore not connected to scope ground. PP018† passive probe (for <50V battery-supplied drives) are often grounded to a common “REF” board connection. The DUT will usually work fine in this situation.
36 VDC 72 VPK-PK 42 VPK
48 VDC 96 VPK-PK 55 VPK
170 VDC 340 VPK-PK 196 VPK
340 VDC 680 VPK-PK 393 VPK
566 VDC 1132 VPK-PK 654 VPK HVD3106 (Qty. 3)HVP120 could also be used, but ONLY for line-neutral probing with the three ground leads tied to each other (not to scope ground) and therefore not connected to scope ground.
679 VDC 1358 VPK-PK 784 VPK
849 VDC 1698 VPK-PK 980 VPK
976 VDC 1952 VPK-PK 1127 VPK
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† PP018 is rated for 400VRMS Line-Line probing is recommended – it is more intuitive to view the signal this way.
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Drive 3-phase Output Current Probing RequirementsAll Input AAC values in RMS
Input Current # Input Phases Probe (Quantity)Up to 30 AAC 3 CP030 (50 MHz) (Qty. 3)Up to 150 AAC 3 CP150 (Qty. 3)Up to 500 AAC 3 CP500 (Qty. 3)>500 AAC* 3 Current Shunt
Pearson Current TransformersDanisense Current TransducersPEM-UK Rogowski Coils
10/2/14Teledyne LeCroy Company Confidential 65
* These devices may not be DC-coupled. Therefore, an absolute DC reference may not be maintained and this may compromise power measurement accuracy
CP Series current probes cost more, but they do provide the DC reference that many customers want
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HDOsHigh Definition Oscilloscopes
HDOsHDOsHigh Definition High Definition OscilloscopesOscilloscopes
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High Definition Oscilloscopes (HDO)
12-bit HW ADC resolution,15 bit with ERES
Best Signal Fidelity
Highest Resolution
Lowest Electrical Noise
Maximum Accuracy
Teledyne LeCroy’s Innovation in the oscilloscope concept
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HD4096 High Definition Technology
Combination ofHigh Sample Rate 12-bit ADCsHigh signal-to-noise input amplifiersLow noise system architecture
16 times more resolution than any other oscilloscope on the market
Capture high frequency signals with 1GHz bandwidth
BenefitsClean, Crisp WaveformsMore Signal DetailsPrecise Waveform Measurements
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Waveform Signal Path
Analog Waveform
Amp
DigitizedWaveform
AD
C
Analog-to-Digital Converter Display
Processing
AcquisitionMemory
Trigger Circuit
SIMPLIFIED OSCILLOSCOPE BLOCK DIAGRAM
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High Definition Oscilloscopes
LeCroy oscilloscopes with high resolution ADCs are the next generation of oscilloscopes providing 16 times more resolution than traditional 8 bit instruments
LeCroy HRO 6 ZiLeCroy HRO 6 Zi88--bit ADC becomes bit ADC becomes
1212--bit ADCbit ADC
HDO4000 & HDO4000 & HDO6000HDO6000
1212--bit ADCbit ADC
Available Quantization Levels in an ADC = 2 N bits of Resolution
Quantization levels – 16 times 16 times more for 12more for 12--bit scopesbit scopes
ADC Resolution Number of Steps Dynamic Range
8 256 ~48 dB
12 4096 ~72 dB
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Highest Resolution12-bits provides 16 times resolution compared to 8-bits
Resolution = The number of available levels= 2 bits of Resolution
ADC Resolution
Number of Steps
Dynamic Range
8 256 48 dB12 4096 72 dB
Scope with low resolution Scope with high resolution
Quantization Error
712/27/2015
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Highest Resolution12-bit allows detection of smaller signal variations
The higher number of bits means the lower measurable voltage
Full ScaleSmallest Voltage Step8 bits 12 bits
80 V 312.5 mV 19.5 mV40 V 156.2 mV 9.76 mV20 V 78.1 mV 4.88 mV8 V 31.3 mV 1.95 mV4 V 15.6 mV 976 µV
1.6 V 6.3 mV 390 µV800 mV 3.1 mV 195 µV400 mV 1.56 mV 97.6 µV160 mV 625 µV 39 µV80 mV 313 µV 19.5 µV40 mV 156 µV 9.76 µV16 mV 62.5 µV 3.9 µV8 mV 31.2 µV 1.95 µV
When measuring an 8 V signal, the smallest detectable voltage variation is 1.95 mV, compared to 31.3 mV on an 8-bit ADC.
Company confidential 722/27/2015
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8-Bit Scope Baseline Noise
12-Bit Scope Baseline Noise
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Comparison of 8-Bit and 12-Bit Acquisitions of ripple waveform
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Multi-tone waveform acquired with 8-bit ADC
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Multi-tone waveform acquired with 12-bit ADC
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Comparison of noise floor and detected peaks of multi-tone waveform using 8-Bit and 12-Bit acquisitions