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NI (National Instruments) · PCI Express

PCIe-7841

The NI PCIe-7841 is an R Series PCI Express multifunction reconfigurable I/O device with a Virtex-5 LX30 FPGA, 8 analog inputs, 8 analog outputs and 96 bidirectional digital channels.

ManufacturerNI (National Instruments)

ModelPCIe-7841

Part Number781100-01

Product TypeVirtex-5 LX30 FPGA, 200 kS/s Multifunction Reconfigurable I/O Device

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Maximum Sample Rate200 kS/s

Bus ConnectionPCI Express

Maximum Clock Rate40 MHz

Bidirectional Digital Channels96

Digital I/O Logic Levels3.3 V, 5 V

FPGAVirtex-5 LX30

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Overview

Product overview

Key product information and technical features.

The PCIe-7841 combines analog and digital I/O with a user-programmable FPGA on a PCI Express board. NI part number 781100-01 is identified in the supplied structured record as the PCIe-7841R R Series Multifunction RIO Device.

The FPGA enables onboard processing and direct control of I/O signals through LabVIEW FPGA Module customization. A dedicated A/D converter per input channel supports simultaneous sampling and independent timing and triggering, including multirate sampling.

Virtex-5 LX30 FPGA provides reconfigurable onboard I/O processing and control.
Eight analog inputs support single-ended or differential operation, simultaneous sampling, 16-bit resolution and a -10 V to 10 V range.
Eight analog voltage outputs provide 16-bit resolution across a -10 V to 10 V range.
96 bidirectional digital channels support the listed 3.3 V and 5 V logic levels.
PCI Express host connection and VHDCI front connection integrate the board with host and external signal wiring.

Verified specifications

Technical data

Verified product specifications.

Maximum Sample Rate	200 kS/s
Bus Connection	PCI Express
Maximum Clock Rate	40 MHz
Number of Bidirectional Digital Channels	96
Digital I/O Logic Levels	3.3 V, 5 V
FPGA	Virtex-5 LX30
Analog Input Voltage Range	-10 V to 10 V
Enclosed	No
Electrical Signal Measured	Voltage
Reconfigurable	Yes
Number of Analog Input Channels	8
Maximum Digital Update Rate	25 ns
Maximum Analog Update Rate	1 MS/s
Number of Analog Output Channels	8
Operating Temperature Range	0 °C to 40 °C
Front Connection Type	VHDCI
Signaling Type	Single-Ended
Maximum Number of Single-Ended Analog Input Channels	8
Maximum Number of Differential Analog Input Channels	8
Analog Input Resolution	16 bits
Number of Voltage Output Channels	8
Analog Output Voltage Range	-10 V to 10 V
Analog Output Resolution	16 bits
Simultaneous Sampling	Yes
Analog Input Absolute Accuracy	3.97 mV
NI part numbers	781100-01

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NI

Manufacturer

PCI Express

Bus Connection

PCIe-7841

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Specifications (NI)Specifications · ni.com

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Getting Started (NI)Getting Started · ni.com

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Letter Of Volatility (NI)Letter Of Volatility · ni.com

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Dimensional Drawings (NI)Dimensional Drawings · ni.com

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Product Page (NI)Product Page · ni.com

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FAQ

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What FPGA does the PCIe-7841 use?

It uses a Virtex-5 LX30 FPGA for reconfigurable onboard processing and I/O control.

How many analog and digital channels does it provide?

The device provides 8 analog input channels, 8 analog output channels and 96 bidirectional digital channels.

What are the analog voltage ranges and resolutions?

Both analog inputs and analog outputs have a -10 V to 10 V range and 16-bit resolution. The analog inputs support simultaneous sampling.

What connections does the PCIe-7841 use?

It uses PCI Express for the host connection and VHDCI for the front connection. Consult the NI getting-started guide for installation and wiring requirements.