型号: PXI-6236

产品编号: 779622-01

DEVICE SPECIFICATIONS NI 6236

M Series Data Acquisition: 16-Bit, 250 kS/s, 4 AI, 4 AO, 6 DI, 4 DO, Current Input, Voltage Output, Bank Isolation

The following specifications are typical at 25 °C, unless otherwise noted. For more information about the NI 6236, refer to the NI 6236 User Manual available at ni.com/manuals.

 




Analog Input

Number of   channels

4 differential current inputs

Channel   type

Current input

ADC   resolution

16 bits

DNL

No missing codes guaranteed

INL

Refer to AI Absolute Accuracy section

Sample   rate


Maximum

250 kS/s

Minimum

No minimum

Timing   accuracy

50 ppm of sample rate

Timing   resolution

50 ns

Input   coupling

DC

Input   range

±20 mA

Maximum   working voltage for analog inputs

Refer to Maximum Working Voltage section

Input impedance under normal operating conditions (AI+ to AI-)

Typical   (25 °C)

92 Ω in parallel with 100 pF

Maximum   (55 °C)

110 Ω in parallel with 100 pF

Input   bias current

±100 pA

Crosstalk   (at 100 kHz)


Adjacent   channels

-75 dB

Non-adjacent   channels

-90 dB

Small signal bandwidth (-3 dB)                          700 kHz

Input   FIFO size

4,095 samples

Scan   list memory

4,095 entries

Data   transfers

DMA   (scatter-gather), interrupts, programmed I/O

Overvoltage protection (AI x+ or AI x- with respect to AI GND)

Device   on

±25 V for up to two AI pins

Device   off

±15 V for up to two AI pins

Overvoltage   protection (AI x+ to AI x-)

±20 V maximum

Overcurrent   protection

±40 mA maximum[1]

Settling Time for Multichannel Measurements

Accuracy,   full-scale step, all ranges


±90 ppm   of step (±6 LSB)

4 μs convert interval

±30 ppm   of step (±2 LSB)

5 μs convert interval

±15 ppm   of step (±1 LSB)

7 μs convert interval

Typical Performance Graphs

Figure 1. AI Small Signal Bandwidth

Figure 2. AI CMRR to Earth Ground

AI Absolute Accuracy

Note Accuracies listed are valid for up to one year from the device external calibration.

Table 1. AI Absolute Accuracy

Nominal

Range

Positive

Full

Scale

Nominal Range

Negative

Full

Scale

Residual

Gain

Error

(ppm   of

Reading)

Residual

Offset

Error

(ppm   of

Range)

Offset

Tempco

(ppm   of

Range/°C)

Random

Noise,   σ

(μArms)

Absolute

Accuracy at   Full

Scale

(μA)

Sensitivity

(μA)

0.02

-0.02

595

100

79

0.6

18.9

0.24

Note Sensitivity is the smallest current change that can be detected. It is a function of noise.

Gain tempco                                                    35 ppm/°C

Reference   tempco

5 ppm/°C

INL error

76 ppm of range

AI Absolute Accuracy Equation

AbsoluteAccuracy = Reading · (GainError) + Range · (OffsetError) + NoiseUncertainty

GainError = ResidualAIGainError + GainTempco · (TempChangeFromLastInternalCal)

+ ReferenceTempco · (TempChangeFromLastExternalCal)

OffsetError = ResidualAIOffsetError + OffsetTempco ·

(TempChangeFromLastInternalCal) + INLError

                                         Random Noise ⋅   3

NoiseUncertainty =  for a coverage factor of 3 σ and averaging

100 points.

AI Absolute Accuracy Example

Absolute accuracy at full scale on the analog input channels is determined using the following assumptions:

•         TempChangeFromLastExternalCal = 10 °C

•         TempChangeFromLastInternalCal = 1 °C

•         number_of_readings = 100

•         CoverageFactor = 3 σ

For example, on the 20 mA range, the absolute accuracy at full scale is as follows:

GainError = 595 ppm + 35 ppm · 1 + 5 ppm · 10 = 680 ppm

OffsetError = 100 ppm + 79 ppm · 1 + 76 ppm = 255 ppm

NoiseUncertainty =  = .18 µA

AbsoluteAccuracy = 20 mA · (GainError) + 20 mA · (OffsetError) + NoiseUncertainty =

18.9 µA

Analog Output

Number of   channels

4

Channel   type

Voltage output

DAC   resolution

16 bits

DNL

±1 LSB

Monotonicity

16 bit guaranteed

Maximum   update rate


1   channel

500 kS/s

2   channels

450 kS/s per channel

3   channels

425 kS/s per channel

4   channels

400 kS/s per channel

Timing   accuracy

50 ppm of sample rate

Timing   resolution

50 ns

Output   range

±10 V

Output   coupling

DC

Output impedance                                            0.4 Ω

Output   current drive

±5 mA

Overdrive   protection

±25 V

Overdrive   current

10 mA

Power-on   state

±20 mV

Power-on   glitch

±2 V for 2 ms

Power-off   glitch[2]

±100 mV for 350 ms

Output   FIFO size

8,191 samples shared among channels used

Data   transfers

DMA   (scatter-gather), interrupts, programmed I/O

AO   waveform modes

Non-periodic waveform, periodic waveform regeneration mode from   onboard FIFO, periodic waveform regeneration from host buffer including   dynamic update

Settling   time, full-scale step,

15 ppm   (1 LSB)

6 µs

Slew   rate

15 V/µs

Glitch   energy


Magnitude

100 mV

Duration

3 µs

AO Absolute Accuracy

Absolute accuracy at full-scale numbers is valid immediately following internal calibration and assumes the device is operating within 10 °C of the last external calibration.

Note Accuracies listed are valid for up to one year from the device external calibration.

Table 2. AO Absolute Accuracy

Nominal

Range

Positive

Full   Scale

(A)

Nominal Range

Negative

Full   Scale

(A)

Residual

Gain   Error

(ppm of

Reading)

Gain

Tempco

(ppm/°C)

Residual

Offset

Error (ppm of   Range)

Offset

Tempco

(ppm of

Range/°C)

Absolute

Accuracy at Full

Scale   (μA)

10

-10

90

10

40

5

3,230

Reference tempco

INL error

AO Absolute Accuracy Equation

AbsoluteAccuracy = OutputValue · (GainError) + Range · (OffsetError)

GainError = ResidualGainError + GainTempco · (TempChangeFromLastInternalCal) +

ReferenceTempco · (TempChangeFromLastExternalCal)

OffsetError = ResidualOffsetError + AOOffsetTempco ·

(TempChangeFromLastInternalCal) + INLError

Digital I/O/PFI

Static   Characteristics


Number of   channels (10 total)


Number   of input channels

6 (PFI <0..5>/P0.<0..5>)

Number   of output channels

4 (PFI <6..9>/P1.<0..3>)

Ground   reference

D GND

Direction   control

Fixed, lines are unidirectional

Input   voltage protection

±20 V on up to two pins[3]

PFI   <0..5>/P0.<0..5>

Static digital input, timing input

PFI   <6..9>/P1.<0..3>

Static   digital output, timing output

PFI/Port 0/Port 1 Functionality

Timing output sources

Many AI, AO, counter timing signals

Debounce filter settings

ns, 6.425 µs, 2.56 ms, disable; high andlow   transitions; selectable per input

Digital Input Characteristics

Level

Minimum

Maximum

VIL input low voltage

0 V

0.8 V

VIH input high voltage

2 V

5.25 V

IIL input low current (Vin = 0 V)

-

-10 μA

IIH input high current (Vin = 5 V)

-

10 μA

Digital Output Characteristics

Table 3. Guaranteed Output Levels

Level

Voltage Level

Current Level

VOL

0.4 V

7 mA

VOL

0.6 V

10 mA

VOH

2.8 V

-24 mA

VOH

4.0 V

-6 mA

Maximum Operating Conditions

Level

Minimum

Maximum

IOL output low current P1.<0..3>

—

10 mA

IOH output high current P1.<0..3>

—

-24 mA

General-Purpose Counters/Timers

Number of   counter/timers

2

Resolution

32 bits

Counter   measurements

Edge counting, pulse, semi-period, period, two-edge separation

Position measurements                                      X1, X2, X4 quadrature encoding with

Channel Z reloading; two-pulse encoding

Output   applications

Pulse, pulse train with dynamic updates, frequency division,   equivalent time sampling

Internal   base clocks

80 MHz, 20 MHz, 0.1 MHz

External   base clock frequency

0 MHz to 20 MHz

Base   clock accuracy

50 ppm

Inputs

Gate,   Source, HW_Arm, Aux, A, B, Z,

Up_Down

Routing   options for inputs

Any input PFI, RTSI, PXI_TRIG, PXI_STAR, many internal signals

FIFO

2 samples

Data   transfers

Dedicated scatter-gather DMA controller for each counter/timer;   interrupts;

programmed I/O

Isolation   Effects


Maximum   propagation delay through isolator


Digital   inputs

35 ns

Digital   outputs

45 ns

Propagation   delay skew between channels

(inputs   and outputs)

15 ns

Frequency   Generator


Number   of channels

1

Base   clocks

10 MHz, 100 kHz

Divisors

1 to 16

Base   clock accuracy

50 ppm

Output can be available on any output PFI or RTSI terminal.

Phase-Locked Loop (PLL)

Number   of PLLs

1

Reference   signal

PXI_STAR, PXI_CLK10, RTSI <0..7>

Output   of PLL

80 MHz   Timebase; other signals derived from

80 MHz   Timebase including 20 MHz and

100 kHz Timebases

External Digital Triggers

Source

Any PFI, RTSI, PXI_TRIG, PXI_STAR

Polarity

Software-selectable for most signals

Analog   input function

Start   Trigger, Reference Trigger,

Pause   Trigger, Sample Clock, Convert Clock,

Sample Clock Timebase

Analog   output function

Start   Trigger, Pause Trigger, Sample Clock,

Sample Clock Timebase

Counter/timer   function

Gate,   Source, HW_Arm, Aux, A, B, Z,

Up_Down

Device-to-Device Trigger Bus

PCI                                                                  RTSI <0..7>[4]

PXI

PXI_TRIG <0..7>, PXI_STAR

Output   selections

10 MHz Reference Clock, frequency generator output, many internal   signals

Debounce   filter settings

125 ns, 6.425 μs, 2.56 ms, disable; high and low transitions;   selectable per input

Bus Interface


PCI/PXI

3.3 V or 5 V signal environment

The PXI device can be installed in PXI slots or PXI Express hybrid slots.

DMA channels                                                  4, analog input, analog output, counter/timer 0,

counter/timer 1

Power Requirements

Current draw from bus during no-load condition

+5 V

0.5 A

+12 V

20 mA

Current draw from bus during AI and AO overvoltage condition

+5 V

0.75 A

+12 V

20 mA

Physical Characteristics

Dimensions


PCI   printed circuit board

9.7 cm × 15.5 cm (3.8 in. × 6.1 in.)

PXI   printed circuit board

Standard 3U PXI

Weight


PCI

110 g (3.8 oz)

PXI

150 g (5.2 oz)

I/O   connector

37-pin D-SUB

Calibration


Recommended   warm-up time

15 minutes

Calibration   interval

1 year

Maximum Working Voltage

Maximum working voltage refers to the signal voltage plus the common-mode voltage.

dielectric withstand test

5 In the figure, |Va – Ve|, |Vb – Ve|, |Vc – Ve|, and |Vd – Ve|.

Channel-to-bus[5]

dielectric withstand test

AI   channel-to-AI GND (in the following figure, |Va - Vd|)

≤11 V, Measurement Category I

AO   channel-to-AO GND (in the following figure, |Vb - Vd|)

≤11 V, Measurement Category I

Digital   channel-to -D GND (in the following figure, |Vc - Vd|)

≤5.25 V, Measurement Category I

Measurement Category I is for measurements performed on circuits not directly connected to the electrical distribution system referred to as MAINS voltage. MAINS is a hazardous live electrical supply system that powers equipment. This category is for measurements of voltages from specially protected secondary circuits. Such voltage measurements include signal levels, special equipment, limited-energy parts of equipment, circuits powered by regulated lowvoltage sources, and electronics.

Caution This device is rated for Measurement Category I and the voltage across the isolation barrier is limited to no greater than 30 Vrms/60 VDC/42.4 Vpk continuous. These test and measurement circuits are not intended for direct connection to the MAINS building installations of Measurement Categories CAT II, CAT III, or CAT IV.

The following figure illustrates the maximum working voltage specifications.

Figure 3. NI 6236 Maximum Working Voltage

Environmental

Operating   environment


Ambient   temperature range

0 °C to 55   °C (Tested in accordance with

IEC-60068-2-1 and IEC-60068-2-2.)

Relative   humidity range

10% to 90%, noncondensing (Tested in accordance with   IEC-60068-2-56.)

Storage   environment


Ambient   temperature range

-40 °C to   70 °C (Tested in accordance with

IEC-60068-2-1 and IEC-60068-2-2.)

Relative   humidity range

5% to 95%, noncondensing (Tested in accordance with   IEC-60068-2-56.)

Maximum   altitude

2,000 m

Pollution   Degree

2

Indoor use only.

Shock and Vibration (PXI Only)

Operational   shock

30 g peak, half-sine, 11 ms pulse (Tested in accordance with IEC   60068-2-27. Test profile developed in accordance with

MIL-PRF-28800F.)

Random   vibration


Operating

5 Hz to 500 Hz, 0.3 grms

Nonoperating

5 Hz to 500 Hz, 2.4 grms (Tested in accordance with IEC   60068-2-64. Nonoperating test profile exceeds the requirements of

MIL-PRF-28800F, Class 3.)

Safety


This product is designed to meet the requirements of the following electrical equipment safety standards for measurement, control, and laboratory use:

•         IEC 61010-1, EN 61010-1

•         UL 61010-1, CSA 61010-1

Note For UL and other safety certifications, refer to the product label or the Online Product Certification section.

Electromagnetic Compatibility

This product meets the requirements of the following EMC standards for electrical equipment for measurement, control, and laboratory use:

•         EN 61326-1 (IEC 61326-1): Class A emissions; Basic immunity

•         EN 55011 (CISPR 11): Group 1, Class A emissions

•         EN 55022 (CISPR 22): Class A emissions

•         EN 55024 (CISPR 24): Immunity

•         AS/NZS CISPR 11: Group 1, Class A emissions

•         AS/NZS CISPR 22: Class A emissions

•         FCC 47 CFR Part 15B: Class A emissions

•         ICES-001: Class A emissions

Note In the United States (per FCC 47 CFR), Class A equipment is intended for use in commercial, light-industrial, and heavy-industrial locations. In Europe, Canada, Australia and New Zealand (per CISPR 11) Class A equipment is intended for use only in heavy-industrial locations.

Note Group 1 equipment (per CISPR 11) is any industrial, scientific, or medical equipment that does not intentionally generate radio frequency energy for the treatment of material or inspection/analysis purposes.

Note For EMC declarations and certifications, and additional information, refer to the Online Product Certification section.

This product meets the essential requirements of applicable European Directives, as follows:

•         2014/35/EU; Low-Voltage Directive (safety)

•         2014/30/EU; Electromagnetic Compatibility Directive (EMC)

•         2011/65/EU; Restriction of Hazardous Substances (RoHS)

Online Product Certification

Refer to the product Declaration of Conformity (DoC) for additional regulatory compliance information. To obtain product certifications and the DoC for this product, visit ni.com/ certification, search by model number or product line, and click the appropriate link in the Certification column.

Environmental Management

NI is committed to designing and manufacturing products in an environmentally responsible manner. NI recognizes that eliminating certain hazardous substances from our products is beneficial to the environment and to NI customers.

For additional environmental information, refer to the Minimize Our Environmental Impact web page at ni.com/environment. This page contains the environmental regulations and directives with which NI complies, as well as other environmental information not included in this document.

Waste Electrical and Electronic Equipment (WEEE)

  EU Customers At the end of the product life cycle, all NI products must be disposed of according to local laws and regulations. For more information about how to recycle NI products in your region, visit ni.com/environment/weee. 电子信息产品污染控制管理办法（中国RoHS）

中国客户 National Instruments 符合中国电子信息产品中限制使用某些有害物质指令(RoHS)。关于 National Instruments 中国 RoHS 合规性信息，请登录 ni.com/environment/rohs_china。(For information about China RoHS compliance, go to ni.com/environment/rohs_china.)

Device Pinout

Refer to the NI Trademarks and Logo Guidelines at ni.com/trademarks for information on NI trademarks. Other product and company names mentioned herein are trademarks or trade names of their respective companies. For patents covering NI products/technology, refer to the appropriate location: Help»Patents in your software, the patents.txt file on your media, or the National Instruments Patent Notice at ni.com/patents. You can find information about end-user license agreements (EULAs) and third-party legal notices in the readme file for your NI product. Refer to the Export Compliance Information at ni.com/ legal/export-compliance for the NI global trade compliance policy and how to obtain relevant HTS codes, ECCNs, and other import/export data. NI MAKES NO EXPRESS OR IMPLIED WARRANTIES AS TO THE ACCURACY OF THE INFORMATION CONTAINED HEREIN AND SHALL NOT BE LIABLE FOR ANY ERRORS. U.S. Government Customers: The data contained in

this manual was developed at private expense and is subject to the applicable limited rights and restricted data rights as set forth in FAR 52.227-14, DFAR 252.227-7014, and DFAR 252.227-7015.

© 2015—2016 National Instruments. All rights reserved.

371949D-01     Jun16


[1] Any voltage applied resulting in current flowing above 40 mA can damage the device permanently.

[2] When outputting 0 V on power down from the analog output channel.

[3] Stresses beyond those listed under Input voltage protection may cause permanent damage to the device.

[4] In other sections of this document, RTSI refers to RTSI <0..7> for the PCI devices or PXI_TRIG <0..7> for PXI devices.

[5] In the figure, |Va – Vf|, |Vb – Vf|, |Vc – Vf|, and |Vd – Vf|.