PCI-6254 and PXI-6254 Specifications

PCI-6254 and PXI-6254 Pinout

1378 — Figure 1. PCI-6254 and PXI-6254 Pinout

Analog Input

Number of channels

16 differential or 32 single ended

ADC resolution

16 bits

DNL

No missing codes guaranteed

INL

Refer to the AI Absolute Accuracy section

Single channel maximum

1.25 MS/s

Multichannel maximum (aggregate)

1.00 MS/s

Minimum

No minimum

Timing resolution

50 ns

Timing accuracy

50 ppm of sample rate

Input coupling

DC

Input range

±0.1 V, ±0.2 V, ±0.5 V, ±1 V, ±2 V, ±5 V, ±10 V

Maximum working voltage for analog inputs (signal + common mode)

±11 V of AI GND

CMRR (DC to 60 Hz)

100 dB

Device on
AI+ to AI GND	>10 GΩ in parallel with 100 pF
AI- to AI GND	>10 GΩ in parallel with 100 pF

Device off
AI+ to AI GND	820 Ω
AI- to AI GND	820 Ω

Input bias current

±100 pA

Crosstalk (at 100 kHz)
Adjacent channels	-75 dB
Non-adjacent channels	-95 dB

Small signal bandwidth (-3 dB)	1.7 MHz
Input FIFO size	4,095 samples
Scan list memory	4,095 entries
Data transfers	DMA (scatter-gather), interrupts, programmed I/O

Overvoltage protection for all analog input and sense channels
Device on	±25 V for up to four AI pins
Device off	±15 V for up to four AI pins

Input current during overvoltage condition

±20 mA maximum/AI pin

Settling Time for Multichannel Measurements

Table 1. Settling Time for Multichannel Measurements
Range	±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 V	1 μs	1.5 μs
±0.5 V	1.5 μs	2 μs
±0.1 V, ±0.2 V	2 μs	8 μs

Typical Performance Graphs

AI Absolute Accuracy

Note Accuracies listed are valid for up to two years from the device external calibration.

Table 2. 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 (μVrms)	Absolute Accuracy at Full Scale (μV)	Sensitivity (μV)
10	-10	60	20	21	280	1,920	112.0
5	-5	70	20	21	140	1,010	56.0
2	-2	70	20	24	57	410	22.8
1	-1	80	20	27	32	220	12.8
0.5	-0.5	90	40	34	21	130	8.4
0.2	-0.2	130	80	55	16	74	6.4
0.1	-0.1	150	150	90	15	52	6.0

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

Gain tempco	13 ppm/°C
Reference tempco	1 ppm/°C
INL error	60 ppm of range

AI Absolute Accuracy Equation

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

GainError = ResidualAIGainError + GainTempco · (TempChangeFromLastInternalCal) + ReferenceTempco · (TempChangeFromLastExternalCal)
OffsetError = ResidualAIOffsetError + OffsetTempco · (TempChangeFromLastInternalCal) + INLError
NoiseUncertainty =
$\frac{Random Noise \cdot 3}{\sqrt{100}}$
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 10 V range, the absolute accuracy at full scale is as follows:

GainError = 60 ppm + 13 ppm · 1 + 1 ppm · 10 = 83 ppm
OffsetError = 20 ppm + 21 ppm · 1 + 60 ppm = 101 ppm
NoiseUncertainty =
$\frac{280 µ V \cdot 3}{\sqrt{100}}$
= 84 µV
AbsoluteAccuracy = 10 V · (GainError) + 10 V · (OffsetError) + NoiseUncertainty = 1,920 µV

Analog Triggers

Number of triggers

1

Source

AI <0..31>, APFI <0, 1>

Functions

Start Trigger, Reference Trigger, Pause Trigger, Sample Clock, Convert Clock, Sample Clock Timebase

Source level
AI <0..31>	±Full scale
APFI <0, 1>	±10 V

Resolution	10 bits, 1 in 1,024
Modes	Analog edge triggering, analog edge triggering with hysteresis, and analog window triggering

Bandwidth (-3 dB)
AI <0..31>	3.4 MHz
APFI <0, 1>	3.9 MHz

Accuracy

±1%

APFI <0, 1> characteristics
Input impedance	10 kΩ
Coupling	DC
Protection, power on	±30 V
Protection, power off	±15 V

Digital I/O/PFI

Static Characteristics

Number of channels	48 total, 32 (P0.<0..31>), 16 (PFI <0..7>/P1, PFI <8..15>/P2)
Ground reference	D GND
Direction control	Each terminal individually programmable as input or output
Pull-down resistor	50 kΩ typical, 20 kΩ minimum
Input voltage protection	±20 V on up to two pins^[1]¹ Stresses beyond those listed under Input voltage protection may cause permanent damage to the device.

Waveform Characteristics (Port 0 Only)

Terminals used

Port 0 (P0.<0..31>)

Port/sample size

Up to 32 bits

Waveform generation (DO) FIFO

2,047 samples

Waveform acquisition (DI) FIFO

2,047 samples

DI Sample Clock frequency

0 MHz to 10 MHz, system and bus activity dependent

DO Sample Clock frequency
Regenerate from FIFO	0 MHz to 10 MHz
Streaming from memory	0 MHz to 10 MHz, system and bus activity dependent

Data transfers	DMA (scatter-gather), interrupts, programmed I/O
DI or DO Sample Clock source^[2]² The digital subsystem does not have its own dedicated internal timing engine. Therefore, a sample clock must be provided from another subsystem on the device or an external source.	Any PFI, RTSI, AI Sample or Convert Clock, Ctr n Internal Output, and many other signals

PFI/Port 1/Port 2 Functionality

Functionality	Static digital input, static digital output, timing input, timing output
Timing output sources	Many AI, counter, DI, DO timing signals
Debounce filter settings	125 ns, 6.425 µs, 2.56 ms, disable; high and low transitions; selectable per input

Recommended Operating Conditions


Level	Minimum	Maximum
Input high voltage (V_IH)	2.2 V	5.25 V
Input low voltage (V_IL)	0 V	0.8 V
Output high current (I_OH) P0.<0..31>	—	-24 mA
Output high current (I_OH) PFI <0..15>/P1/P2	—	-16 mA
Output low current (I_OL) P0.<0..31>	—	24 mA
Output low current (I_OL) PFI <0..15>/P1/P2	—	16 mA

Electrical Characteristics


Level	Minimum	Maximum
Positive-going threshold (VT+)	—	2.2 V
Negative-going threshold (VT-)	0.8 V	—
Delta VT hystersis (VT+ - VT-)	0.2 V	—
I_IL input low current (V_in = 0 V)	—	-10 µA
I_IH input high current (V_in = 5 V)	—	250 µA

Digital I/O Characteristics

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 PFI, RTSI, PXI_TRIG, PXI_STAR, analog trigger, many internal signals
FIFO	2 samples
Data transfers	Dedicated scatter-gather DMA controller for each counter/timer; interrupts; programmed I/O

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
Counter/timer function	Gate, Source, HW_Arm, Aux, A, B, Z, Up_Down
Digital waveform generation (DO) function	Sample Clock
Digital waveform acquisition (DI) function	Sample Clock

Device-to-Device Trigger Bus

PCI	RTSI <0..7>^[3]³ In other sections of this document, RTSI refers to RTSI <0..7> for the PCI devices or PXI_TRIG <0..7> for PXI devices.
PXI	PXI_TRIG <0..7>, PXI_STAR
Output selections	10 MHz 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
DMA channels	6, 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 chassis

Table 3. PXI/SCXI Combo and PXI Express Chassis Compatibility
M Series Part Number	SCXI Control in PXI/SCXI Combo Chassis	PXI Express Hybrid Slot Compatible
191325D-02/191325E-03L	No	Yes
191325C-0x/191325B-0x	Yes	No

Power Requirements

Current draw from bus during no-load condition
+5 V	0.03 A
+3.3 V	0.725 A
+12 V	0.35 A

Current draw from bus during AI overvoltage condition
+5 V	0.03 A
+3.3 V	1.2 A
+12 V	0.38 A

Note Current draw from bus during no-load condition or AI overvoltage condition does not include P0/PFI/P1/P2 and +5 V terminals.

Current Limits

Caution Exceeding the current limits may cause unpredictable behavior by the device and/or PC/chassis.

PCI
+5 V terminal (connector 0)	1 A maximum
+5 V terminal (connector 1)	1 A maximum

PXI
+5 V terminal (connector 0)	1 A maximum
+5 V terminal (connector 1)	1 A maximum
P0/PFI/P1/P2 and +5 V terminals combined	2 A maximum

Note For both PCI and PXI, older revisions have a self-resetting fuse that opens when current exceeds this specification. Newer revisions have a traditional fuse that opens when current exceeds this specification. This fuse is not customer-replaceable; if the fuse permanently opens, return the device to NI for repair.

Physical Characteristics

Dimensions
PCI printed circuit board	10.6 cm × 15.5 cm(4.2 in. × 6.1 in.)
PXI printed circuit board	Standard 3U PXI

Weight
PCI	152 g (5.3 oz)
PXI	222 g (7.8 oz)

I/O connectors

Two 68-pin VHDCI

Calibration

Recommended warm-up time	15 minutes
Calibration interval	2 years

Maximum Working Voltage

Connect only voltages that are below these limits.

Channel-to-earth

11 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 low-voltage sources, and electronics.

Caution Do not use for measurements within Categories II, III, or IV.

Note Measurement Categories CAT I and CAT O (Other) are equivalent. 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.

Environmental

Operating temperature	0 ºC to 55 ºC
Storage temperature	-20 ºC to 70 ºC
Humidity	10% RH to 90% RH, noncondensing
Maximum altitude	2,000 m
Pollution Degree (indoor use only)	2

Indoor use only.

Safety Compliance Standards

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 C22.2 No. 61010-1

Note For safety certifications, refer to the product label or the Product Certifications and Declarations section.

EMC Standards

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 Product Certifications and Declarations section.

CE Compliance

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)

Product Certifications and Declarations

Refer to the product Declaration of Conformity (DoC) for additional regulatory compliance information. To obtain product certifications and the DoC for NI products, visit ni.com/product-certifications, search by model number, and click the appropriate link.

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 Engineering a Healthy Planet 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.

EU and UK Customers

Waste Electrical and Electronic Equipment (WEEE)—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RoHS— NI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NI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.)