PXIe-6571 Specifications

These specifications apply to the PXIe-6571 (8-channel) and PXIe-6571 (32-channel).

Note Unless otherwise noted, "PXIe-6571" encompasses both the 8-channel and 32-channel variants.

When using the PXIe-6571 in the Semiconductor Test System, refer to the Semiconductor Test System Specifications.

Definitions

Warranted specifications describe the performance of a model under stated operating conditions and are covered by the model warranty. Warranted specifications account for measurement uncertainties, temperature drift, and aging. Warranted specifications are ensured by design or verified during production and calibration.

Characteristics describe values that are relevant to the use of the model 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 testing.

Specifications are Nominal unless otherwise noted.

Conditions

Specifications are valid under the following conditions unless otherwise noted.

  • Operating temperature of 0 °C to 40 °C
  • Chassis with slot cooling capacity as follows:
    • PXIe-6571 (8-channel): ≥58 W
    • PXIe-6571 (32-channel): 82 W
  • Operating temperature within ±5 ºC of the last self-calibration temperature[1]1 For guidance on thermal management best practices, visit ni.com/info and enter the Info Code ThermalManagement.
  • Recommended calibration interval of 1 year. The PXIe-6571 will not meet specifications unless operated within the recommended calibration interval.
  • DUT Ground Sense (DGS) same potential as the Ground (GND) pins
  • 30-minute warmup time before operation
Note When the pin electronics on the PXIe-6571 are in the disconnect state, some I/O protection and sensing circuitry remain connected. Do not subject the PXIe-6571 to voltages beyond the supported measurement range.

PXIe-6571 Pinout

The PXIe-6571 exposes signal terminals via a VHDCI connector.

Figure 1. PXIe-6571 (8-channel) Connector Pinout

PXIe-6571 (8-channel) Connector Pinout

Figure 2. PXIe-6571 (32-channel) Connector Pinout

PXIe-6571 (32-channel) Connector Pinout

Table 1. PXIe-6571 Digital Data and Control Connector Pins/Signal Descriptions
Signal Type Signal Name Signal Description
Data DIO <0..31> Bidirectional PPMU-capable digital I/O data channels 0 through 31.
Ground GND Instrument ground. Acts as the default ground reference when DUT Ground Sense (DGS) is not connected.
DGS Optional DGS for improved accuracy at higher currents in some configurations.
Analog CAL MEASURE Resource for external calibration.
CAL SENSE
CAL GND
CAL FORCE
N/A RESERVED These terminals are reserved for future use. Do not connect to these pins.
Note The digital I/O data channels of 32-channel digital pattern instruments are split into banks for PPMU operation efficiency: DIO <0..7>, DIO <8..15>, DIO <16..23>, DIO <24..31>. PPMU measurements run in parallel when you take measurements on channels across different banks. Taking PPMU measurements simultaneously with channels on the same bank impacts test time performance based on certain measurement settings. Test time performance for frequency counter measurements is not impacted by taking multiple frequency counter measurements on channels in the same bank.

General

Channel count

PXIe-6571 (8-channel)

8

PXIe-6571 (32-channel)

32

System channel count, PXIe-6571 (32-channel)[2]2 The system channel count is the maximum number of channels available when using multiple PXIe-6571 (32-channel) instruments in a single chassis as a digital subsystem within an application system. Some functionality described in this document requires that a PXIe-6674T synchronization module be used in conjunction with each digital subsystem.

512

Multi-site resources per instrument

PXIe-6571 (8-channel)

8

PXIe-6571 (32-channel)

8

Large Vector Memory (LVM)

128M vectors

History RAM (HRAM)

(8,192 / n sites) - 1 cycles

Maximum allowable offset (DGS minus GND)

±300 mV

Supported measurement range[3]3 If the total voltage sourced or driven on any pin relative to GND exceeds the supported measurement range, instrument performance may be degraded.

-2 V to 7 V[4]4 Voltage > 6 V requires the Extended Voltage Range mode of operation. For additional information, refer to PPMU Force Voltage.

Vector Timing

Maximum vector rate

100 MHz

Vector period range

10 ns to 40 µs (100 MHz to 25 kHz)

Vector period resolution

38 fs

Timing control

Vector period

Vector-by-vector on the fly

Edge timing

Per channel, vector-by-vector on the fly

Drive formats

Per channel, vector-by-vector on the fly

Clocking

Master clock source

PXIe_CLK100[5]5 Sourced from chassis 100 MHz backplane reference clock, external 10 MHz reference, or PXIe-6674T.

Sequencer clock domains

One (independent sequencer clock domains on a single instrument not supported)

Drive and Compare Formats

Drive formats6 The maximum vector rate for patterns may be limited by the pulse width requirements, which may not allow all formats and edge multipliers to be used up to the fastest vector rate.[6]

100 MHz maximum vector rate

Non-Return (NR), Return to Low (RL), Return to High (RH)

50 MHz maximum vector rate

Surround by Complement (SBC)[7]7 The SBC format is not supported within the 2x edge multiplier mode.

Compare formats

Edge strobe

Edge Multipliers[6]

1x, 2x

Figure 3. Drive Formats

1378

Figure 4. 2x Mode Drive Formats

1378

Pin Data States

  • 0—Drive zero
  • 1—Drive one
  • L—Compare low
  • H—Compare high
  • X—Do not drive; mask compare
  • M—Compare midband, not high or low
  • V—Compare high or low, not midband; store results from capture functionality if configured
  • D—Drive data from source functionality if configured
  • E—Expect data from source functionality if configured
  • -—Repeat previous cycle; do not use a dash (-) for the pin state on the first vector of a pattern file unless the file is used only as a target of a jump or call operation
  • Note Termination mode settings affect the termination applied to all non-driving pin states. Non-drive states include L, H, M, V, X, E, and potentially -. Refer to the Programmable input termination mode specification for more information.

    Edge Types

    Drive edges

    6: drive on, drive data, drive return,

    drive data 2, drive return 2, drive off

    Compare edge

    2: strobe, strobe 2

    Number of time sets[8]8 31 time sets can be configured. One additional time set, represented by a -, repeats the previous time set.

    31

    Edge Generation Timing

    Edge placement range

    Minimum

    Start of vector period (0 ns)

    Maximum

    5 vector periods or 40 µs, whichever is smaller

    Minimum required edge separation

    Between any driven data change

    3.75 ns

    Between any Drive On and Drive Off edges

    5 ns

    Between Compare Strobes

    5 ns

    Edge placement resolution

    39.0625 ps

    Edge placement accuracy, drive9 For specifications in a Semiconductor Test System, refer to the Semiconductor Test System Specifications.[9]

    Edge Multiplier = 1x, PXIe-6571 (32-channel)

    ±500 ps, warranted

    Edge Multiplier = 1x, PXIe-6571 (8-channel)

    ±500 ps, typical

    Edge Multiplier = 2x

    Bit Rate200 Mbps: ±500 ps, typical

    Bit Rate266 Mbps: ±600 ps, typical

    Edge placement accuracy, compare[9]

    Edge Multiplier = 1x, PXIe-6571 (32-channel)

    ±500 ps, warranted

    Edge Multiplier = 1x, PXIe-6571 (8-channel)

    ±500 ps, typical

    Edge Multiplier = 2x

    Bit Rate100 Mbps: ±500 ps, typical

    Bit Rate133 Mbps: ±700 ps, typical

    Overall timing accuracy[9]

    Edge Multiplier = 1x, PXIe-6571 (32-channel)

    ±1.5 ns, warranted

    Edge Multiplier = 1x, PXIe-6571 (8-channel)

    ±1.5 ns, typical

    Edge Multiplier = 2x

    Bit Rate200 Mbps: ±1.5 ns, typical

    Bit Rate266 Mbps: ±1.8 ns, typical

    TDR deskew adjustment resolution

    39.0625 ps

    Driver

    Signal type

    Single-ended, referenced to the DGS pin when connected. Otherwise referenced to GND.

    Programmable levels

    VIH, VIL, VTERM

    Voltage levels

    Range (VIH, VIL, VTERM)

    -2 V to 6 V

    Minimum swing (VIH minus VIL)

    400 mV, into a 1 MΩ load

    Resolution (VIH, VIL, VTERM)

    122 µV

    Accuracy (VIH, VIL, VTERM)

    ±15 mV, 1 MΩ load, warranted

    Maximum DC drive current

    ±32 mA

    Output impedance

    50 Ω

    Rise/fall time, 20% to 80%

    1.2 ns, up to 5 V

    Comparator

    Signal type

    Single-ended, referenced to the DGS pin when connected. Otherwise referenced to GND.

    Programmable levels

    VOH, VOL

    Voltage levels

    Range (VOH, VOL)

    -2 V to 6 V

    Resolution (VOH, VOL)

    122 µV

    Accuracy (VOH, VOL)

    ±25 mV, from -1.5 V to 5.8 V, warranted

    Programmable input termination modes

    High Z, 50 Ω to VTERM, Active Load

    Leakage current

    <15 nA, in the High Z termination mode

    Active Load

    Programmable levels

    IOH, IOL

    Commutating voltage (VCOM)

    Range

    -2 V to 6 V

    Resolution

    122 µV

    Current levels

    Range

    1.5 mA to 16 mA

    Resolution

    488 nA

    Accuracy

    1 mA, 3 V over/under drive, typical

    PPMU Force Voltage

    Signal type

    Single-ended, referenced to the DGS pin when connected. Otherwise referenced to GND.

    Voltage levels

    Range

    -2 V to 6 V

    6 V to 7 V in Extended Voltage Range10 The Extended Voltage Range is an unwarranted mode of operation that allows the PMU to force voltages between 6 V and 7 V for applications that can tolerate more error than the normal force voltage accuracy.[10]

    Resolution

    122 μV

    Accuracy

    ±15 mV, 1 MΩ load, from -2 V to 6 V, warranted

    ±50 mV, 1 MΩ load, from 6 V to 7 V, typical[10]

    PPMU Measure Voltage

    Signal type

    Single-ended, referenced to the DGS pin when connected. Otherwise referenced to GND.

    Voltage levels

    Range

    -2 V to 6 V

    Resolution

    228 μV

    Accuracy

    ±5 mV, warranted

    PPMU Force Current

    Table 2. PPMU Force Current Accuracy
    Range Resolution Accuracy
    ±2 µA 60 pA ±1% of range for Zone 1 of Figure 5, warranted
    ±32 µA 980 pA
    ±128 μA 3.9 nA
    ±2 mA 60 nA
    ±32 mA 980 nA
    Figure 5. Warranted Current Accuracy Zone for PPMU Force Current

    1378

    Note The boundaries of Zone 1 are inclusive of that zone. The area outside of Zone 1 does not have a warranted specification for PPMU force current accuracy.

    How to Calculate PPMU Force Current Accuracy

    1. Specify the desired forced current.
    2. Based on the desired forced current, select an appropriate current range from Table 2.
    3. Divide the desired forced current from step 1 by the current range from step 2 and multiply by 100 to calculate the Percent of Current Range Forced.
    4. Based on the impedance of the load, calculate the voltage required to force the desired current from step 1. Use the following equation: Voltage Required = Desired Current × Load Impedance.
    5. Using Figure 5, locate the zone in which the Percent of Current Range Forced calculated in step 3 intersects with the voltage calculated in step 4. If the intersection is outside of Zone 1, then there are no warranted specifications. To get warranted specifications, the current range and/or forced current must be adjusted until the intersection is in Zone 1.
    6. Based on the zone found in step 5, use Table 2 to calculate the accuracy of the forced current.
    PPMU voltage clamps

    Range

    -2 V to 6 V

    Resolution

    122 μV

    Accuracy

    ±100 mV, typical

    PPMU Measure Current

    Table 3. PPMU Measure Current Accuracy
    Range Resolution Accuracy
    ±2 μA 460 pA

    ±1% of range for Zone 1 of Figure 6, warranted

    ±1.5% of range for Zone 2 of Figure 6, warranted

    ±32 μA 7.3 nA
    ±128 μA 30 nA
    ±2 mA 460 nA
    ±32 mA 7.3 μA
    Figure 6. Warranted Current Accuracy Zones for PPMU Measure Current

    1378

    Note The boundaries of Zone 1 are inclusive of that zone. All other boundaries are inclusive of Zone 2. The area outside of Zone 1 and Zone 2 does not have a warranted specification for PPMU measure current accuracy.

    How to Calculate PPMU Measure Current Accuracy

    1. Specify the desired measured current.
    2. Based on the desired measured current, select an appropriate current range from Table 3.
    3. Divide the desired measured current from step 1 by the current range from step 2 and multiply by 100 to calculate the Percent of Current Range Measured.
    4. If forcing voltage and then measuring current, Voltage in Figure 6 is equal to the forced voltage. If forcing current and then measuring current, Voltage in Figure 6 is equal to the voltage required to force the desired current based on the impedance of the load. Use the following equation: Voltage Required = Desired Current × Load Impedance.
    5. Using Figure 6, locate the zone in which the Percent of Current Range Measured calculated in step 3 intersects with the Voltage calculated in step 4. If the intersection is outside of Zone 1 or Zone 2, then there are no warranted specifications. To get warranted specifications, the current range and forced current or forced voltage must be adjusted until the intersection is in Zone 1 or Zone 2.
    6. Based on the zone found in step 5, use Table 3 to calculate the accuracy of the measured current.

    PPMU Programmable Aperture Time

    Aperture time

    Minimum

    4 μs

    Maximum

    65 ms

    Resolution

    4 μs

    Figure 7. Voltage Measurement Noise for Given Aperture Times, Typical

    1378

    Opcodes

    Refer to the following table for supported opcodes. Using matched and failed opcode parameters with multiple PXIe-6571 instruments requires the PXIe-6674T synchronization module. Other uses of flow-control opcodes with multiple PXIe-6571 instruments only require NI-TClk synchronization.

    Category Supported Opcodes
    Flow Control
    • repeat
    • jump
    • jump_if
    • set_loop
    • end_loop
    • exit_loop
    • exit_loop_if
    • call
    • return
    • keep_alive
    • match
    • halt
    Sequencer Flags and Registers
    • set_seqflag
    • clear_seqflag
    • write_reg
    Signal
    • set_signal
    • pulse_signal
    • clear_signal
    Digital Source and Capture
    • capture_start
    • capture
    • capture_stop
    • source_start
    • source
    • source_d_replace

    Pipeline Latencies

    Minimum delay between source_start opcode and the first source opcode or subsequent source_start opcode

    3 μs

    Matched and failed condition pipeline latency

    80 cycles

    Source and Capture

    Digital Source11 To learn how to calculate achievable data rates for Digital Source or Digital Capture, visit ni.com/info and enter the Info Code DigitalSourceCapture to access the Calculating Digital Source Rate tutorial or the Calculating Digital Capture Rate tutorial.[11]

    Operation modes

    Serial and parallel; broadcast and site-unique

    Source memory size

    32 MB (256 Mbit) total

    Maximum waveforms

    512

    Digital Capture[11]

    Operation modes

    Serial and parallel; site-unique

    Capture memory size

    1 million samples

    Maximum waveforms

    512

    Independent Clock Generators

    Number of clock generators

    PXIe-6571 (8-channel)

    8 (one per pin)

    PXIe-6571 (32-channel)

    32 (one per pin)

    Clock period range

    6.25 ns to 40 us (160 MHz to 25 kHz)[12]12 Clocks with Period < 7.5 ns will have a non-50% duty cycle.

    Clock period resolution

    38 fs

    Frequency Measurements

    Frequency counter measure frequency

    Range

    5 kHz to 200 MHz, 2.5 ns minimum pulse width

    Accuracy

    See Calculating Frequency Counter Error

    Calculating Frequency Counter Error

    Use the following equation to calculate the frequency counter error (ppm).

    (TBerr(1TBerr)+20ns(MeasurementTimeUnknownClockPeriod))×1,000,000

    where

    • Measurement Time is the time, in seconds, over which the frequency counter measurement is configured to run
    • Unknown Clock Period is the time, in seconds, of the period of the signal being measured
    • TBerr is the error of the Clk100 timebase

    Refer to the following table for a few examples of common Clk100 timebase accuracies.

    Table 4. TBerr
    PXI Express Hardware Specification Revision 1.0 PXIe-1095 Chassis PXIe-6674T Override
    100 µ (100 ppm) 25 µ (25 ppm) 80 n (80 ppb)

    Example 1: Calculating Error with a PXIe-1095 Chassis

    Calculate the error of performing a frequency measurement of a 10 MHz clock (100 ns period) with a 1 ms measurement time using the PXIe-Clk100 provided by the PXIe-1095 chassis as the timebase.

    Solution

    (25µ(125µ)+20ns(1ms100ns))×1,000,000=45ppm

    Example 2: Calculating Error when Overriding with the PXIe-6674T

    Calculate the error if you override the PXIe-Clk100 timebase with the PXIe-6674T and increase the measurement time to 10 ms.

    Solution

    (80n(180n)+20ns(10ms100ns))×1,000,000=2ppm

    Calibration Interval

    Recommended calibration interval

    1 year

    Safety Voltages

    Connect only voltages that are within these limits.

    Supported measurement range[13]13 If the total voltage sourced or driven on any pin relative to GND exceeds the supported measurement range, instrument performance may be degraded.

    -2 V to 7 V[14]14 Voltage > 6 V requires the Extended Voltage Range mode of operation.

    Measurement Category

    CAT I

    Measurement Category

    Caution Do not connect the product to signals or use for measurements within Measurement Categories II, III, or IV.

    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 low-voltage sources, and electronics.

    Note Measurement Categories CAT I and CAT O are equivalent. These test and measurement circuits are for other circuits not intended for direct connection to the MAINS building installations of Measurement Categories CAT II, CAT III, or CAT IV.

    Environmental Guidelines

    Notice This model is intended for use in indoor applications only.

    Environmental Characteristics

    Temperature

    Operating[15]15 The PXIe-6571 (8-channel) requires a chassis with ≥58 W slot cooling capacity; the PXIe-6571 (32-channel) requires a chassis with 82 W slot cooling capacity. Refer to the specifications for your PXI chassis to determine the ambient temperature ranges your chassis can achieve.

    0 °C to 40 °C

    Storage

    -40 °C to 71 °C

    Humidity

    Operating

    10% to 90%, noncondensing

    Storage

    5% to 95%, noncondensing

    Pollution Degree

    2

    Maximum altitude

    2,000 m (800 mbar) (at 25 °C ambient temperature)

    Shock and Vibration

    Operating vibration

    5 Hz to 500 Hz, 0.3 g RMS

    Non-operating vibration

    5 Hz to 500 Hz, 2.4 g RMS

    Operating shock

    30 g, half-sine, 11 ms pulse

    Physical Characteristics

    PXIe slots

    1

    Dimensions

    131 mm × 21 mm × 214 mm (5.16 in. × 0.83 in. × 8.43 in.)

    Weight

    640 g (22.5 oz.)

    Power Requirements

    The PXIe-6571 draws current from a combination of the 3.3 V and 12 V power rails. The maximum current drawn from each of these rails can vary depending on the PXIe-6571 mode of operation.

    Input power

    PXIe-6571 (8-channel)

    49 W

    PXIe-6571 (32-channel)

    76 W

    Current draw, PXIe-6571 (8-channel)

    3.3 V

    1.3 A

    12 V

    3.7 A

    Current draw, PXIe-6571 (32-channel)

    3.3 V

    1.7 A

    12 V

    5.9 A

    1 For guidance on thermal management best practices, visit ni.com/info and enter the Info Code ThermalManagement.

    2 The system channel count is the maximum number of channels available when using multiple PXIe-6571 (32-channel) instruments in a single chassis as a digital subsystem within an application system. Some functionality described in this document requires that a PXIe-6674T synchronization module be used in conjunction with each digital subsystem.

    3 If the total voltage sourced or driven on any pin relative to GND exceeds the supported measurement range, instrument performance may be degraded.

    4 Voltage > 6 V requires the Extended Voltage Range mode of operation. For additional information, refer to PPMU Force Voltage.

    5 Sourced from chassis 100 MHz backplane reference clock, external 10 MHz reference, or PXIe-6674T.

    6 The maximum vector rate for patterns may be limited by the pulse width requirements, which may not allow all formats and edge multipliers to be used up to the fastest vector rate.

    7 The SBC format is not supported within the 2x edge multiplier mode.

    8 31 time sets can be configured. One additional time set, represented by a -, repeats the previous time set.

    9 For specifications in a Semiconductor Test System, refer to the Semiconductor Test System Specifications.

    10 The Extended Voltage Range is an unwarranted mode of operation that allows the PMU to force voltages between 6 V and 7 V for applications that can tolerate more error than the normal force voltage accuracy.

    11 To learn how to calculate achievable data rates for Digital Source or Digital Capture, visit ni.com/info and enter the Info Code DigitalSourceCapture to access the Calculating Digital Source Rate tutorial or the Calculating Digital Capture Rate tutorial.

    12 Clocks with Period < 7.5 ns will have a non-50% duty cycle.

    13 If the total voltage sourced or driven on any pin relative to GND exceeds the supported measurement range, instrument performance may be degraded.

    14 Voltage > 6 V requires the Extended Voltage Range mode of operation.

    15 The PXIe-6571 (8-channel) requires a chassis with ≥58 W slot cooling capacity; the PXIe-6571 (32-channel) requires a chassis with 82 W slot cooling capacity. Refer to the specifications for your PXI chassis to determine the ambient temperature ranges your chassis can achieve.