NI 6254 Device Specifications - National Instruments

1 Device SPECIFICATIONSNI 6254M Series Data Acquisition: 32 AI, MS/s, 48 DIOThe following Specifications are typical at 25 C, unless otherwise noted. For moreinformation about the NI 6254, refer to the M Series User Manual available at InputNumber of channels16 differential or 32 single endedADC resolution16 bitsDNLNo missing codes guaranteedINLR efer to the AI Absolute Accuracy sectionSample rateSingle channel MS/sMultichannel maximum (aggregate) MS/sMinimumNo minimumTiming resolution50 nsTiming accuracy50 ppm of sample rateInput couplingDCInput range V, V, V, 1 V, 2 V, 5 V, 10 VMaximum working voltage for analoginputs (signal + common mode) 11 V of AI GNDCMRR (DC to 60 Hz)100 dBInput impedanceDevice onAI+ to AI GND>10 G in parallel with 100 pFAI- to AI GND>10 G in parallel with 100 pFDevice offAI+ to AI GND820 AI- to AI GND820 Input bias current 100 pACrosstalk (at 100 kHz)

2 Adjacent channels-75 dBNon-adjacent channels-95 dBSmall signal bandwidth (-3 dB) MHzInput FIFO size4,095 samplesScan list memory4,095 entriesData transfersDMA (scatter-gather), interrupts,programmed I/OOvervoltage protection for all analog input and sense channelsDevice on 25 V for up to four AI pinsDevice off 15 V for up to four AI pinsInput current during overvoltage condition 20 mA maximum/AI pinSettling Time for Multichannel MeasurementsTable 1. Settling Time for Multichannel MeasurementsRange 60 ppm of Step( 4 LSB for Full-Scale Step) 15 ppm of Step( 1 LSB for Full-Scale Step) 1 V, 2 V, 5 V, 10 V1 s s2 s V, V2 s8 s2 | | NI 6254 Device SpecificationsTypical Performance GraphsFigure 1. Settling Error versus Time for Different Source Impedances110100 Time ( s)Error (ppm of Step Size)101001 K10 K1 k 2 k 5 k 10 k 100 Figure 2.

3 AI Small Signal Bandwidth 8 7 6 5 4 3 2 1011 k10 k100 k1000 k10000 kFrequency (Hz)Normalized Signal Amplitude (dB)NI 6254 Device Specifications | National Instruments | 3 Figure 3. AI CMRR405060708090100110120130101001 k10 k100 kFrequency (Hz)CMRR (dB)10 V Range5 V V RangeAI Absolute AccuracyNote Accuracies listed are valid for up to two years from the Device 2. AI Absolute AccuracyNominalRangePositiveFullScaleNom inalRangeNegativeFullScaleResidualGainEr ror(ppm ofReading)ResidualOffsetError(ppm ofRange)OffsetTempco(ppm ofRange/ C)RandomNoise, ( Vrms)AbsoluteAccuracyat FullScale( V)Sensitivity( V) 10-106020212801, , | | NI 6254 Device SpecificationsNote Sensitivity is the smallest voltage change that can be detected. It is a functionof tempco13 ppm/ CReference tempco1 ppm/ CINL error60 ppm of rangeAI Absolute Accuracy EquationAbsoluteAccuracy = Reading (GainError) + Range (OffsetError) + NoiseUncertaintyGainError = ResidualAIGainError + GainTempco (TempChangeFromLastInternalCal)+ ReferenceTempco (TempChangeFromLastExternalCal)OffsetErr or = ResidualAIOffsetError + OffsetTempco (TempChangeFromLastInternalCal) + INLE rrorNoiseUncertainty = RandomNoise 3100 for a coverage factor of 3 and averaging100 Absolute Accuracy ExampleAbsolute accuracy at full scale on the analog input channels is determined using the followingassumptions.

4 TempChangeFromLastExternalCal = 10 C TempChangeFromLastInternalCal = 1 C number_of_readings = 100 CoverageFactor = 3 For example, on the 10 V range, the absolute accuracy at full scale is as follows:GainError = 60 ppm + 13 ppm 1 + 1 ppm 10 = 83 ppmOffsetError = 20 ppm + 21 ppm 1 + 60 ppm = 101 ppmNoiseUncertainty = 280 3100 = 84 VAbsoluteAccuracy = 10 V (GainError) + 10 V (OffsetError) + NoiseUncertainty =1,920 VAnalog TriggersNumber of triggers1 SourceAI < >, APFI <0, 1>FunctionsStart Trigger, Reference Trigger,Pause Trigger, Sample Clock, Convert Clock,Sample Clock TimebaseNI 6254 Device Specifications | National Instruments | 5 Source levelAI < > Full scaleAPFI <0, 1> 10 VResolution10 bits, 1 in 1,024 ModesAnalog edge triggering, analog edge triggeringwith hysteresis, and analog window triggeringBandwidth (-3 dB)

5 AI < > MHzAPFI <0, 1> MHzAccuracy 1%APFI <0, 1> characteristicsInput impedance10 k CouplingDCProtection, power on 30 VProtection, power off 15 VDigital I/O/PFIS tatic CharacteristicsNumber of channels48 total, 32 (P0.< >),16 (PFI < >/P1, PFI < >/P2)Ground referenceD GNDD irection controlEach terminal individually programmable asinput or outputPull-down resistor50 k typical, 20 k minimumInput voltage protection 20 V on up to two pins1 Waveform Characteristics (Port 0 Only)Terminals usedPort 0 (P0.< >)Port/sample sizeUp to 32 bitsWaveform generation (DO) FIFO2,047 samplesWaveform acquisition (DI) FIFO2,047 samples1 Stresses beyond those listed under Input voltage protection may cause permanent damage to | | NI 6254 Device SpecificationsDI Sample Clock frequency0 MHz to 10 MHz, system and bus activitydependentDO Sample Clock frequencyRegenerate from FIFO0 MHz to 10 MHzStreaming from memory0 MHz to 10 MHz, system and bus activitydependentData transfersDMA (scatter-gather)

6 , interrupts,programmed I/ODI or DO Sample Clock source2 Any PFI, RTSI, AI Sample or Convert Clock,Ctr n Internal Output, and many other signalsPFI/Port 1/Port 2 FunctionalityFunctionalityStatic digital input, static digital output,timing input, timing outputTiming output sourcesMany AI, counter, DI, DO timing signalsDebounce filter settings125 ns, s, ms, disable; high andlow transitions; selectable per inputRecommended Operating ConditionsLevelMinimumMaximum Input high voltage (VIH) VInput low voltage (VIL)0 VOutput high current (IOH) P0.< > -24 mAOutput high current (IOH) PFI < >/P1/P2 -16 mAOutput low current (IOL) P0.< > 24 mAOutput low current (IOL) PFI < >/P1/P2 16 mAElectrical CharacteristicsLevelMinimumMaximum Positive-going threshold (VT+) VNegative-going threshold (VT-) V 2 The digital subsystem does not have its own dedicated internal timing engine.

7 Therefore, a sampleclock must be provided from another subsystem on the Device or an external 6254 Device Specifications | National Instruments | 7 LevelMinimumMaximum Delta VT hystersis (VT+ - VT-) V IIL input low current (Vin = 0 V) -10 AIIH input high current (Vin = 5 V) 250 ADigital I/O CharacteristicsFigure 4. P0.< >: Ioh versus Voh 50 45 40 35 30 25 20 15 10 5023456 Voh (V)Ioh (mA)55 C; Vdd = V25 C; Vdd = V0 C; Vdd = VFigure 5. PFI < >/P1/P2: Ioh versus Voh 50 45 40 35 30 25 20 15 10 5023456 Voh (V)Ioh (mA)55 C; Vdd = V25 C; Vdd = V0 C; Vdd = V8 | | NI 6254 Device SpecificationsFigure 6. P0.< >: Iol versus (V)Iol (mA)55 C; Vdd = V25 C; Vdd = V0 C; Vdd = VFigure 7. PFI < >/P1/P2: Iol versus (V)Iol (mA)55 C; Vdd = V25 C; Vdd = V0 C; Vdd = VGeneral-Purpose Counters/TimersNumber of counter/timers2 Resolution32 bitsCounter measurementsEdge counting, pulse, semi-period, period,two-edge separationPosition measurementsX1, X2, X4 quadrature encoding withChannel Z reloading.

8 Two-pulse encodingOutput applicationsPulse, pulse train with dynamic updates,frequency division, equivalent time samplingNI 6254 Device Specifications | National Instruments | 9 Internal base clocks80 MHz, 20 MHz, MHzExternal base clock frequency0 MHz to 20 MHzBase clock accuracy50 ppmInputsGate, Source, HW_Arm, Aux, A, B, Z,Up_DownRouting options for inputsAny PFI, RTSI, PXI_TRIG, PXI_STAR,analog trigger, many internal signalsFIFO2 samplesData transfersDedicated scatter-gather DMA controller foreach counter/timer; interrupts;programmed I/OFrequency GeneratorNumber of channels1 Base clocks10 MHz, 100 kHzDivisors1 to 16 Base clock accuracy50 ppmOutput can be available on any output PFI or RTSI Loop (PLL)Number of PLLs1 Reference signalPXI_STAR, PXI_CLK10, RTSI < >Output of PLL80 MHz Timebase; other signals derived from80 MHz Timebase including 20 MHz and100 kHz TimebasesExternal Digital TriggersSourceAny PFI, RTSI, PXI_TRIG, PXI_STARP olaritySoftware-selectable for most signalsAnalog input functionStart Trigger, Reference Trigger,Pause Trigger, Sample Clock, Convert Clock,Sample Clock Timebase10 | | NI 6254 Device SpecificationsCounter/timer functionGate, Source, HW_Arm, Aux, A, B, Z,Up_DownDigital waveform generation (DO)functionSample ClockDigital waveform acquisition (DI)functionSample ClockDevice-to- Device Trigger BusPCIRTSI < >3 PXIPXI_TRIG < >, PXI_STARO utput selections10 MHz Clock, frequency generator output,many internal signalsDebounce filter settings125 ns, s, ms, disable; high andlow transitions.

9 Selectable per inputBus V or 5 V signal environmentDMA channels6, can be used for analog input, digital input,digital output, counter/timer 0, counter/timer 1 The PXI Device supports one of the following features: May be installed in PXI Express hybrid slots Or, may be used to control SCXI in PXI/SCXI combo chassisTable 3. PXI/SCXI Combo and PXI Express Chassis CompatibilityM Series Part NumberSCXI Control in PXI/SCXIC ombo ChassisPXI Express Hybrid SlotCompatible 191325D-02/191325E-03 LNoYes191325C-0x/191325B-0xYesNo3In other sections of this document, RTSI refers to RTSI < > for the PCI devices orPXI_TRIG < > for PXI 6254 Device Specifications | National Instruments | 11 Power RequirementsCurrent draw from bus during no-load condition4+5 A+ A+12 ACurrent draw from bus during AI overvoltage condition4+5 A+ A+12 ACurrent LimitsCaution Exceeding the current limits may cause unpredictable behavior by thedevice and/or +5 V terminal (connector 0)1 A maximum5+5 V terminal (connector 1)1 A maximum5 PXI+5 V terminal (connector 0)1 A maximum5+5 V terminal (connector 1)

10 1 A maximum5P0/PFI/P1/P2 and +5 V terminalscombined2 A maximumPhysical CharacteristicsDimensionsPCI printed circuit cm cm ( in. in.)PXI printed circuit boardStandard 3U PXI4 Does not include P0/PFI/P1/P2 and +5 V revisions have a self-resetting fuse that opens when current exceeds this specification . Newerrevisions have a traditional fuse that opens when current exceeds this specification . This fuse is notcustomer-replaceable; if the fuse permanently opens, return the Device to NI for | | NI 6254 Device SpecificationsWeightPCI152 g ( oz)PXI222 g ( oz)I/O connectors2 68-pin VHDCIC alibrationRecommended warm-up time15 minutesCalibration interval2 yearsMaximum Working VoltageMaximum working voltage refers to the signal voltage plus the common-mode V, Measurement Category IMeasurement Category I is for measurements performed on circuits not directly connected tothe electrical distribution system referred to as MAINS voltage.