USB-6211 Specifications - National Instruments

1 SPECIFICATIONSUSB-621116 AI (16-Bit, 250 kS/s), 2 AO (250 kS/s), 4 DI, 4 DO USBM ultifunction I/O DeviceDefinitionsWarranted Specifications describe the performance of a model under stated operatingconditions and are covered by the model following characteristic Specifications describe values that are relevant to the use of themodel under stated operating conditions but are not covered by the model warranty. Typical Specifications describe the performance met by a majority of models. Nominal Specifications describe an attribute that is based on design, conformance testing,or supplemental are Typical unless otherwise are valid at 25 C unless otherwise InputNumber of channels8 differential or 16 single endedADC resolution16 bitsDNLNo missing codes guaranteedINLR efer to the AI Absolute Accuracy sectionSample rateSingle channel maximum250 kS/sMultichannel maximum (aggregate)

2 250 kS/sMinimum0 S/sTiming accuracy50 ppm of sample rateTiming resolution50 nsInput couplingDCInput range V, 1 V, 5 V, 10 VMaximum working voltage for analoginputs (signal + common mode) 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 GND1,200 AI- to AI GND1,200 Input bias current 100 pACrosstalk (at 100 kHz)Adjacent channels-75 dBNon-adjacent channels-90 dBSmall signal bandwidth (-3 dB)450 kHzInput FIFO size4,095 samplesScan list memory4,095 entriesData transfersUSB Signal Stream, programmed I/OOvervoltage protection for all analog input and sense channelsDevice on 30 V for up to two AI pinsDevice off 20 V for up to two AI pinsInput current during overvoltage condition 20 mA maximum/AI pinSettling Time for Multichannel MeasurementsAccuracy, full-scale step, all ranges 90 ppm of step ( 6 LSB)4 s convert interval 30 ppm of step ( 2 LSB)5 s convert interval 15 ppm of step ( 1 LSB)

3 7 s convert interval2 | | USB-6211 SpecificationsTypical Performance GraphsFigure 1. Settling Error versus Time for Different Source Impedances1101001 k10 k110100 Time ( s)Error (ppm of Step Size) 100 1 k 2 k 5 k 10 k Figure 2. AI CMRR406080100120601001 k10 k100 kFrequency (Hz)CMRR (dB)140AI Absolute Accuracy (Warranted)Note Accuracies listed are valid for up to one year from the device The input/output channels of this device are not protected for electromagneticinterference due to functional reasons. As a result, this device may experienceUSB-6211 Specifications | National Instruments | 3reduced measurement accuracy or other temporary performance degradation whenconnected cables are routed in an environment with radiated or conducted radiofrequency electromagnetic interference.

4 To ensure that this device functions withinspecifications in its operational electromagnetic environment and to limit radiatedemissions, care should be taken in the selection, design, and installation ofmeasurement probes and 1. AI Absolute AccuracyNominalRangePositiveFullScale(V) NominalRangeNegativeFullScale (V)ResidualGainError(ppm ofReading)ResidualOffsetError(ppm ofRange)OffsetTempco(ppm ofRange/ C)RandomNoise, ( Vrms)AbsoluteAccuracyat FullScale( V)Sensitivity( V) 10-107520342292, , Sensitivity is the smallest voltage change that can be detected. It is a functionof ppm/ CReference tempco5 ppm/ CINL error76 ppm of rangeAI Absolute Accuracy EquationAbsoluteAccuracy = Reading (GainError) + Range (OffsetError) + NoiseUncertaintyGainError = ResidualAIGainError + GainTempco (TempChangeFromLastInternalCal)+ ReferenceTempco (TempChangeFromLastExternalCal)OffsetErr or = ResidualAIOffsetError + OffsetTempco (TempChangeFromLastInternalCal)

5 + INLE rrorNoiseUncertainty = RandomNoise 3100 for a coverage factor of 3 and averaging100 | | USB-6211 SpecificationsAI 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 = 100 CoverageFactor = 3 For example, on the 10 V range, the absolute accuracy at full scale is as follows:GainError = 75 ppm + ppm 1 + 5 ppm 10 = 132 ppmOffsetError = 20 ppm + 34 ppm 1 + 76 ppm = 130 ppmNoiseUncertainty = 229 3100 = VAbsoluteAccuracy = 10 V (GainError) + 10 V (OffsetError)

6 + NoiseUncertainty =2,690 VAnalog OutputNumber of channels2 DAC resolution16 bitsDNL 1 LSBM onotonicity16 bit guaranteedMaximum update rate1 channel250 kS/s2 channels250 kS/s per channelTiming accuracy50 ppm of sample rateTiming resolution50 nsOutput range 10 VOutput couplingDCOutput Output current drive 2 mAOverdrive protection 30 VOverdrive mAPower-on state 20 mVPower-on glitch 1 V for 200 msOutput FIFO size8,191 samples shared among channels usedUSB-6211 Specifications | National Instruments | 5 Data transfersUSB 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)32 sSlew rate5 V/ sGlitch energyMagnitude100 sAO Absolute Accuracy (Warranted)

7 Absolute accuracy at full-scale numbers is valid immediately following internal calibrationand assumes the device is operating within 10 C of the last external Accuracies listed are valid for up to one year from the device The input/output channels of this device are not protected for electromagneticinterference due to functional reasons. As a result, this device may experiencereduced measurement accuracy or other temporary performance degradation whenconnected cables are routed in an environment with radiated or conducted radiofrequency electromagnetic interference. To ensure that this device functions withinspecifications in its operational electromagnetic environment and to limit radiatedemissions, care should be taken in the selection, design, and installation ofmeasurement probes and 2.

8 AO Absolute AccuracyNominalRangePositiveFull Scale(V)NominalRangeNegativeFull Scale(V)ResidualGain Error(ppm ofReading)GainTempco(ppm/ C)ResidualOffsetError (ppmof Range)OffsetTempco(ppm ofRange/ C)AbsoluteAccuracyat FullScale ( V) 10-10901160123,512 Reference tempco5 ppm/ CINL error128 ppm of range6 | | USB-6211 SpecificationsAO Absolute Accuracy EquationAbsoluteAccuracy = OutputValue (GainError) + Range (OffsetError)GainError = ResidualGainError + GainTempco (TempChangeFromLastInternalCal) +ReferenceTempco (TempChangeFromLastExternalCal)OffsetErr or = ResidualOffsetError + AOOffsetTempco (TempChangeFromLastInternalCal) + INLE rrorDigital I/O and PFIS tatic digital I/O CharacteristicsNumber of digital input channels4 (PFI < >/P0.)

9 < >)Number of digital output channels4 (PFI < >/P1.< >)Ground referenceD GNDPull-down resistor47 k 1%Input voltage protection 20 V on up to 8 pins1 PFI FunctionalityPFI < >/Port 0 FunctionalityStatic digital input, timing inputDebounce filter settings125 ns, s, ms, disable; high andlow transitions; selectable per inputPFI < >/Port 1 FunctionalityStatic digital output, timing outputTiming output sourcesMany AI, AO, counter timing signalsMaximum Operating ConditionsIOL output low current16 mA maximumIOH output high current-16 mA maximum1 Stresses beyond those listed under Input voltage protection may cause permanent damage to Specifications | National Instruments | 7 digital Input CharacteristicsLevelMinimumMaximum VIL input low voltage0 VVIH input high voltage2 VIIL input low current (Vin = 0 V)--10 AIIH input high current (Vin = 5 V)

10 -120 ADigital Output CharacteristicsParameterVoltage LevelCurrent Level V6 V-16 V-6 mAGeneral-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; two-pulse encodingOutput applicationsPulse, pulse train with dynamic updates,frequency division, equivalent time samplingInternal 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 inputsPFI < >, many internal signalsFIFO1,023 samplesData transfersUSB Signal Stream, programmed I/O8 | | USB-6211 SpecificationsFrequency GeneratorNumber of channels1 Base clocks10 MHz.