NI 6351 Device Specifications - National Instruments

1 Device SPECIFICATIONSNI 6351X Series Data Acquisition: MS/s, 16 AI, 24 DIO, 2 AOThe following Specifications are typical at 25 C, unless otherwise noted. For moreinformation about the NI 6351, refer to the X Series User Manual available from InputNumber of channels8 differential or 16 single endedADC resolution16 bitsDNLNo missing codes guaranteedINLR efer to the AI Absolute Accuracy rateSingle channel MS/sMultichannel maximum (aggregate) MS/sMinimumNo minimumTiming resolution10 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)Adjacent channels-75 dBNon-adjacent channels-95 dBSmall signal bandwidth (-3 dB) MHzInput FIFO size2,047 samplesScan list memory4,095 entriesData transfersPCIeDMA (scatter-gather)

2 , programmed I/OUSBUSB Signal Stream, programmed I/OOvervoltage protection for all analog input and sense channelsDevice on 25 V for up to two AI pinsDevice off 15 V for up to two AI pinsInput current during overvoltage condition 20 mA max/AI pinSettling Time for Multichannel MeasurementsRange 60 ppm of Step ( 4 LSB forFull-Scale Step) 15 ppm of Step ( 1 LSB forFull-Scale Step) 10 V, 5 V, 2 V, 1 V1 s s2 s V, V2 s8 s2 | | NI 6351 SpecificationsTypical Performance GraphsFigure 1. Settling Error versus Time for Different Source Impedances10 KTime ( s)Error (ppm of Step Size)101001 K1101001 k 2 k 5 k 10 k 100 Figure 2. AI < > Small Signal Bandwidth 8 7 6 5 4 3 2 1011 k10 k100 k1000 k10000 kFrequency (Hz)Normalized Signal Amplitude (dB)NI 6351 Specifications | National Instruments | 3 Figure 3. AI < > CMRR405060708090100110120130101001 k10 k100 kFrequency (Hz)CMRR (dB)10 V Range5 V V RangeAI Absolute AccuracyTable 1.

3 AI Absolute AccuracyNominalRangePositiveFull ScaleNominalRangeNegativeFull ScaleResidualGain Error(ppm ofReading)ResidualOffsetError (ppmof Range)OffsetTempco(ppm ofRange/ C)RandomNoise, ( Vrms)AbsoluteAccuracy atFull Scale( V) 10-104813212811, | | NI 6351 SpecificationsFor more information about absolute accuracy at full scale, refer to the AI Absolute AccuracyExample tempco13 ppm/ CReference tempco1 ppm/ CINL error46 ppm of rangeNote Accuracies listed are valid for up to two years from the Device Absolute Accuracy EquationAbsoluteAccuracy = Reading (GainError) + Range (OffsetError) + NoiseUncertainityGainError = ResidualGainError + GainTempco (TempChangeFromLastInternalCal) +ReferenceTempco (TempChangeFromLastExternalCal)OffsetErr or = ResidualOffsetError + OffsetTempco (TempChangeFromLastInternalCal)+ INLE rrorNoiseUncertainty = RandomNoise 310,000 for a coverage factor of 3 and averaging10,000 Absolute Accuracy ExampleAbsolute accuracy at full scale on the analog input channels is determined using the followingassumptions: TempChangeFromLastExternalCal = 10 C TempChangeFromLastInternalCal = 1 C number_of_readings = 10,000 CoverageFactor = 3 For example, on the 10 V range, the absolute accuracy at full scale is as follows.

4 GainError = 48 ppm + 13 ppm 1 + 1 ppm 10 = 71 ppmOffsetError = 13 ppm + 21 ppm 1 + 46 ppm = 80 ppmNoiseUncertainty = 281 310,000 = VAbsoluteAccuracy = 10 V (GainError) + 10 V (OffsetError) + NoiseUncertainty =1,520 VNI 6351 Specifications | National Instruments | 5 Analog TriggersNumber of triggers1 SourceAI < >, APFI 0 FunctionsStart Trigger, Reference Trigger, PauseTrigger, Sample Clock, Convert Clock, SampleClock TimebaseSource levelAI < > Full scaleAPFI 0 10 VResolution16 bitsModesAnalog edge triggering, analog edge triggeringwith hysteresis, and analog window triggeringBandwidth (-3 db)AI < > MHzAPFI MHzAccuracy 1% of rangeAPFI 0 characteristicsInput impedance10 k CouplingDCProtection, power on 30 VProtection, power off 15 VAnalog OutputNumber of channels2 DAC resolution16 bitsDNL 1 LSBM onotonicity16 bit guaranteedAccuracyRefer to the AO Absolute Accuracy update rate1 MS/s2 MS/sTiming accuracy50 ppm of sample rateTiming resolution10 ns6 | | NI 6351 SpecificationsOutput range 10 V, 5 V, external reference on APFI 0 Output couplingDCOutput Output current drive 5 mAOverdrive protection 25 VOverrdrive current26 mAPower-on state 5 mVPower on/off V peak for 200 V for s1 Output FIFO size8,191 samples shared among channels usedData transfersPCIeDMA (scatter-gather)

5 , programmed I/OUSBUSB Signal Stream, programmed I/OAO waveform modesNon-periodic waveform, periodic waveformregeneration mode from onboard FIFO,periodic waveform regeneration from hostbuffer including dynamic updateSettling time, full-scale step, 15 ppm(1 LSB)2 sSlew rate20 V/ sGlitch energy at midscale transition, 10 V range10 nV sExternal ReferenceAPFI 0 characteristicsInput impedance10 k CouplingDCProtection, Device on 30 VProtection, Device off 15 VRange 11 VSlew rate20 V/ s1 Typical behavior. Time period may be longer due to host system USB performance. Time periodwill be longer during firmware 6351 Specifications | National Instruments | 7 Figure 4. AO External Reference Bandwidth 90 80 70 60 50 40 30 20 10010100 1 k10 k100 k1 MFrequency (Hz)Normalized AO AmplitudeAttenuation (dB)DAC Output CODE (HEX)FFFFBFFF8 FFF83FF80FF803F800F8003AO Absolute AccuracyAbsolute accuracy at full-scale numbers is valid immediately following self calibration andassumes the Device is operating within 10 C of the last external 2.

6 AO Absolute AccuracyNominalRangePositiveFullScaleNom inalRangeNegativeFullScaleResidualGainEr ror(ppm ofReading)GainTempco(ppm/ C)ReferenceTempco(ppm/ C)ResidualOffsetError(ppm ofRange)OffsetTempco(ppm ofRange/ C)INLE rror(ppmofRange)AbsoluteAccuracyat FullScale( V) 10-1063171332641,8905-5708133264935 Note Accuracies listed are valid for up to two years from the Device Absolute Accuracy EquationAbsoluteAccuracy = OutputValue (GainError) + Range (OffsetError)GainError = ResidualGainError + GainTempco (TempChangeFromLastInternalCal) +ReferenceTempco (TempChangeFromLastExternalCal)OffsetErr or = ResidualOffsetError + OffsetTempco (TempChangeFromLastInternalCal)+ INLE rror8 | | NI 6351 SpecificationsDigital I/O/PFIS tatic CharacteristicsNumber of channels24 total, 8 (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 pinsCaution Stresses beyond those listed under the Input voltage protectionspecification may cause permanent damage to the Characteristics (Port 0 Only)Terminals usedPort 0 (P0.)

7 < >)Port/sample sizeUp to 8 bitsWaveform generation (DO) FIFO2,047 samplesWaveform acquisition (DI) FIFO255 samplesDI Sample Clock frequencyPCIe0 to 10 MHz, system and bus activitydependentUSB0 to 1 MHz, system and bus activity dependentDO Sample Clock frequencyPCIeRegenerate from FIFO0 to 10 MHzStreaming from memory0 to 10 MHz, system and bus activitydependentUSBR egenerate from FIFO0 to 10 MHzStreaming from memory0 to 1 MHz, system and bus activity dependentData transfersPCIeDMA (scatter-gather), programmed I/OUSBUSB Signal Stream, programmed I/ODigital line filter settings160 ns, s, ms, disableNI 6351 Specifications | National Instruments | 9 PFI/Port 1/Port 2 FunctionalityFunctionalityStatic digital input, static digital output, timinginput, timing outputTiming output sourcesMany AI, AO, counter, DI, DO timing signalsDebounce filter settings90 ns, s, ms, custom interval,disable; programmable high and lowtransitions; selectable per inputRecommended Operating ConditionsInput high voltage (VIH) VInput low voltage (VIL)Minimum0 VOutput high current (IOH)P0.

8 < >-24 mA maximumPFI < >/P1/P2-16 mA maximumOutput low current (IOL)P0.< >24 mA maximumPFI < >/P1/P216 mA maximumDigital I/O CharacteristicsPositive-going threshold (VT+) V maximumNegative-going threshold (VT-) V minimumDelta VT hysteresis (VT+ - VT-) V minimumIIL input low current (VIN = 0 V)-10 A maximumIIH input high current (VIN = 5 V)250 A maximum10 | | NI 6351 SpecificationsFigure 5. P0.< >: IOH versus VOHIOH (mA) 30 5 10 15 20 25 35 40 45 VOH (V)0 5055 C; Vdd = V25 C; Vdd = V0 C; Vdd = V62345 Figure 6. P0.< >: IOL versus (mA) (V)4000 C; Vdd = V25 C; Vdd = V55 C; Vdd = VNI 6351 Specifications | National Instruments | 11 Figure 7. PFI < >/P1/P2: IOH versus VOH5 IOH (mA) 30 5 10 15 20 25 35 40 45234 VOH (V)0 50655 C; Vdd = V25 C; Vdd = V0 C; Vdd = 8. PFI < >/P1/P2: IOL versus (mA) (V)00 C; Vdd = V25 C; Vdd = V55 C; Vdd = V40 General-Purpose CountersNumber of counter/timers4 Resolution32 bits12 | | NI 6351 SpecificationsCounter measurementsEdge counting, pulse, pulse width,semi-period, period, two-edge separationPosition measurementsX1, X2, X4 quadrature encoding withChannel Z reloading.

9 Two-pulse encodingOutput applicationsPulse, pulse train with dynamic updates,frequency division, equivalent time samplingInternal base clocks100 MHz, 20 MHz, 100 kHzExternal base clock frequency0 MHz to 25 MHzBase clock accuracy50 ppmInputsGate, Source, HW_Arm, Aux, A, B, Z,Up_Down, Sample ClockRouting options for inputsPCIeAny PFI, RTSI, analog trigger, many internalsignalsUSBAny PFI, analog trigger, many internal signalsFIFO127 samples per counterData transfersPCIeDedicated scatter-gather DMA controller foreach counter/timer, programmed I/OUSBUSB Signal Stream, programmed I/OFrequency GeneratorNumber of channels1 Base clocks20 MHz, 10 MHz, 100 kHzDivisors1 to 16 Base clock accuracy50 ppmOutput can be available on any PFI or RTSI LoopNumber of PLLs1NI 6351 Specifications | National Instruments | 13 Table 3. Reference Clock Locking FrequenciesReference SignalPCIe Locking Input Frequency(MHz)USB Locking Input Frequency(MHz) RTSI < >10, 20 PFI < >10, 2010 Output of PLL100 MHz Timebase.

10 Other signals derived from100 MHz Timebase including 20 MHz and100 kHz TimebasesExternal Digital TriggersSourcePCIeAny PFI, RTSIUSBAny PFIP olaritySoftware-selectable for most signalsAnalog input functionStart Trigger, Reference Trigger, PauseTrigger, Sample Clock, Convert Clock,Sample Clock TimebaseAnalog output functionStart Trigger, Pause Trigger, Sample Clock,Sample Clock TimebaseCounter/timer functionsGate, Source, HW_Arm, Aux, A, B, Z,Up_Down, Sample ClockDigital waveform generation (DO)functionStart Trigger, Pause Trigger, Sample Clock,Sample Clock TimebaseDigital waveform acquisition (DI)functionStart Trigger, Reference Trigger, PauseTrigger, Sample Clock, Sample ClockTimebase14 | | NI 6351 SpecificationsDevice-to- Device Trigger BusInput SourcePCIeRTSI < >USBNoneOutput destinationPCIeRTSI < >USBNoneOutput selections10 MHz Clock, frequency generator output,many internal signalsDebounce filter settings90 ns, s, ms, custom interval,disable; programmable high and lowtransitions.