PCIe-ADIO16-16F PCI Express Card Family with 16 SE or 8 Differential AI, 4 AO, 16 DIO

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  • PCI Express Half-Height/Length with Latching I/O Connector
  • 2× 16-Bit, Bipolar, Differential, A/D Converters Sampling at up to 1Mhz, Simultaneously
    • Software Selectable as 16+0, 8+4, or 0+8 (Single-Ended + Differential Inputs)
    • 7 Channel-By-Channel Programmable Differential Input Ranges from ±0.3125V up to ±12V (48Vp-P)
    • A/D Starts Via Software, External Input, or Periodic Timer
    • A/D “Scan Start” Mode Optimizes Inter-Channel Timing
    • High Impedance, 8-Channel Input: 500 MΩ
    • 4 kSample FIFO plus DMA for Efficient, Robust Data Streaming
  • 16× Digital I/O Pins with Flexible Secondary Functions
  • Four 16-Bit Analog Outputs
    • 5 Per-Channel Programmable Ranges: 0V to 5V, 0V to 10V, ±2.5V, ±5V, ±10V (optional 4-20mA)
    • Outputs Drive ±10Ma Guaranteed
    • “FDS” model allows hardware-timed DMA+FIFO (8 kSamples) waveform streaming on up to four DACs
  • Onboard Watchdog with Dedicated Status Output
  • RoHS Compliant


  • 4-20mA or 10-50mA (Single Ended or Differential) ADC Input Ranges
  • 4-20mA Output Range
  • Extended Temperature Operation (-40°C to +85°C)
  • Support for Wind River VxWorks (call for ordering information)
Last updated on February 21, 2024, 8:51 am


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PCIe-ADIO16-16F Family, PCIe card with 16 Single-Ended or 8 Differential Analog Inputs, 4 Analog Outputs, & 16 DIO

The PCIe-ADIO16-16F is an ideal solution for adding high-speed analog I/O capabilities to any computer with a PCI Express slot.

The PCIe-ADIO16-16F is a 16-bit resolution A/D & D/A card with two simultaneous 1MHz A/D converters, having a total of either 16 single ended, 8 differential, or 8 single ended and 4 differential inputs. Each channel can be independently software configured to accept any of 7 input ranges. Four analog outputs with 5, 10, ±5, ±10, and ±2.5V ranges are provided. Sixteen Digital I/O bits feature advanced functionality including IRQ generation, External DAC Load, ADC Trigger, and ADC Start, as well as a dedicated Watchdog Status Output pin.

The “FDS” model includes a new DMA-driven hardware-timed buffered DAC output feature, “DAC Waveform Streaming”. This feature allows one or more of the DACs to output voltage levels at a software-configurable rate as high as 1 million samples/second. Although the maximum rate is divided by the number of DACs being used, all DACs’ outputs update simultaneously on the hardware clock’s tick — all four DACs can output simultaneous data at 250 kilosamples/second, or one at 1 MHz! All the data is transferred by DMA to minimize CPU utilization, with IRQs so applications can send additional buffers of data as needed.

This analog I/O card provides the user with everything needed to start acquiring and controlling signals in a variety of applications. The PCIe-ADIO16-16F data acquisition board can be used in many current real-world applications such as embedded equipment monitoring, precision PC-based and portable environmental measurements, and mobile data acquisition. The card is designed to be used in rugged industrial environments and is a half-length half-height PCI Express Gen2 1×lane card.

Applications: Optical Networking, Instrumentation, Multichannel Data Acquisition and System Monitoring, Automatic Test Equipment, Process Control and Industrial Automation, Power Line Monitoring.

Special Order

Please contact ACCES with your precise requirement. Examples of special orders would be conformal coating, custom software, custom product labeling, 4-20mA or 5-100mA input support, per-channel input-voltage dividers, and more. We will work with you to provide exactly what is required.

Accessories and Connections

Available accessories include a variety of screw terminal boards for quick and easy connectivity.

  • C68PS18L – 68-Pin SCSI 18” shielded cable with one-touch latches
  • STB-68 – Screw Terminal Board (mounted on standoffs)

Alternately, custom hardware cables and/or interfaces can be produced to fit your specific application requirement.


The card is supported for use in most operating systems and includes a free Linux and Windows compatible software package. This package contains sample programs and source code in C# and Delphi for Windows. Also provided is a graphical setup program in Windows. Linux support includes installation files and basic samples for programming from user level via an open source kernel driver. Third party support includes a Windows standard DLL interface usable from the most popular application programs. Embedded OS support includes the family of Windows Operating Systems including IoT. ACCES is also now offering a VxWorks driver/library for the ultimate real-time process monitoring and control solution.


Data Sheets



Drivers and Downloads

Full list of available Downloads: Software Packages, Drivers, Manuals, and other documents

Information about our Free Software packages:

ACCES is proud to provide a full suite of software support with every Data Acquisition product. We are committed to supporting the most popular operating systems and platforms for our customers. Currently we are actively supporting XP -> 10, both 32 & 64 bit, including “Server 2008,” “Embedded,” and “Compact” flavors for all plug-and-play products including PCI, PCI Express, USB, and more. Many products continue to ship with support for additional operating systems such as DOS, Windows 95, 98, Me, NT4, and 2000.


Among the software we deliver with our products are sample programs in a wide variety of programming languages. These samples are used to demonstrate the software interfaces to our products — and many can be used as-is in your production environments, or to test functionality of the devices out-of-the-box. We’re currently actively supporting sample programs in Microsoft Visual C#, Visual Basic, Delphi, and Visual C/C++, with many devices including samples in Borland C/C++ 3.1 for DOS. Additionally we provide National Instruments LabVIEW compatible DLLs and many demonstration VIs for our devices.


Drivers for various operating systems are also provided, including active support for Windows XP -> 10 — all in both 32-bit and 64-bit flavors, and including consumer, server, and embedded varieties — as well as the 2.6 and newer Linux kernels and recent OSX / macOS versions. Many products continue to ship with driver support for Windows 95, 98, Me, NT4, and Windows 2000, but support for these operating systems is considered deprecated.

Setup Programs and Utilites

Our Data Acquisition devices also include a graphical setup utility that walks you through the process of configuring any option jumpers or switches on the device, as well as explaining a little about the various connectors present.

Many devices also include utility programs – little tools to make your use of the device easier, such as EWriter, a program that allows you to read and write data in the user-accessible EEPROM locations on all our USB data acquisitition products; or WinRISC, a “Really Incredibly Simple Communications” terminal program that lets you get started instantly with serial devices.

“Register Level” Documentation

Besides all this software in all these languages and operating systems ACCES has a policy of open and transparent development: none of our lowest-level “register” interfaces are hidden from you — we document every register in every bus card, every command in every serial board, and every usb control transfer in every USB Data Acquisition board. These lowest-level interfaces allow you to develop for our products in ANY operating system or language, regardless of our actively supporting it or having a driver for it. We have customers actively developing in ADA, Android, Python, Java, MATLAB, Solaris, and more, just by referring to our complete low-level interface documentation! And we provide the full source code to all of our drivers, regardless of operating system, to give you an even bigger head start in your own development tasks.

No Fees or Royalties

All of this software is provided at no additional charge, and is licensed under any of a variety of flexible — and royalty free — options. Check out our software license explanation if you’d like more information.

Custom Software

ACCES also offers Custom Software Services for our products. Our prices are unbelievably low, often as inexpensive as free! If you need something tweaked to support your needs, or an entire enterprise application developed from scratch, it is definitely worth your time to inquire with us, first.

Further information about available ACCES Software:

Redistributing Windows Drivers
A list of ACCES drivers and the files that compose them under different versions of Windows, so you can easily redistribute ACCES cards and drivers.

PC Interface

  • PCI Express 1×lane half-length

Analog Inputs

  • ADC Type: Successive Approximation
  • Resolution: 16-bit
  • Sampling Rate: 2 Msamples/second aggregate
  • Number of Channels: 16+0, 8+4, or 0+8 (SINGLE-ENDED + DIFFERENTIAL) (software selectable)
  • Ranges: ±12, ±10, ±5, ±2.5, ±1.25, ±0.625, ±0.3125V with 0, 0, ±5.12, ±7.68, ±8.96, ±9.60, ±9.92V common mode rejection, respectively
  • 4-20mA or 10-50mA: Factory Option
  • Accuracy: 0.094% Full-Scale (FS) Uncalibrated, 0.0015% FS Calibrated (for best accuracy, system calibration is recommended)
  • Integral Nonlinearity Error: ±0.6 LSB to ±1.5 LSB depending on gain
  • No Missing Codes: 16 bits
  • Input Impedance: >500MΩ
  • Overvoltage Protection: Current limiting through 2 KΩ
  • Crosstalk: -120dB @ 10kHz

Analog Outputs

  • Number: 4
  • Type: Single-Ended
  • Resolution: 16-bit
  • Unipolar Ranges: 0-5V, 0-10V
  • Bipolar Ranges: ±2.5V, ±5V, ±10V
  • Conversion Rate: ≥125kHz per channel
  • Settling Time: 20us typical, +/-10V (+/-1LSB at 16 bits)
  • Output Current: ±10mA per channel, max

Digital Inputs/Outputs

  • Lines: 16, two 8-bit I/O Groups, each software configurable as input or output
  • Input voltage:
    • Logic low: 0V to 0.8V
    • Logic high: 2V to 5V
  • Input current: ±20µA (max)
  • Output voltage:
    • Logic low: 0V to 0.55V
    • Logic high: 2V to VCCIO (3.3VDC, 5VDC tolerant)
  • Output current:
    • Logic low: 24mA sink (max)
    • Logic high: 24mA source (max)
  • Alternate Functions: ADC Conversion Start, ADC Scan Start, ADC Trigger, ADC Gate, DAC Trigger (“LDAC”), External IRQ
  • Dedicated Watchdog Status Output Pin


  • Temperature
    • Operating: 0°C to 70°C (order -T option for industrial temperature -40°C to +85°C)
    • Storage: -40°C to 105°C
  • Humidity: 5% to 95%, non-condensing
  • Power required: +3.3VDC @ 300ma (typical)


  • Weight: 53.0 grams
  • Size
    • Length: 92.96mm (3.66“)
    • Height: 56.134mm (2.21”)
  • I/O connector
    • On-card: 68-Pin SCSI Female, with latches

Regulatory Compliance

  • This product is designed to be in full compliance with CE requirements.
ModelDescriptionPrice (USD)

16 SE or 8 Diff 16-Bit 2M Samples/sec AI aggregate, 16 DIO, 4 DACs with Waveform Output features


16 SE or 8 Diff 16-Bit 2M Samples/sec AI aggregate, 16 DIO, 4 AO PCIe Card


16 SE or 8 Diff 16-Bit 1M Samples/sec AI aggregate, 16 DIO, 4 AO PCIe Card


16 SE or 8 Diff 16-Bit 500K Samples/sec AI aggregate, 16 DIO, 4 AO PCIe Card


16 SE or 8 Diff 16-Bit 2M Samples/sec AI aggregate, 16 DIO PCIe Card


16 SE or 8 Diff 16-Bit 1M Samples/sec AI aggregate, 16 DIO PCIe Card


16 SE or 8 Diff 16-Bit 500K Samples/sec AI aggregate, 16 DIO PCIe Card


16 SE or 8 Diff 12-Bit 1M Samples/sec AI aggregate, 16 DIO, 4 AO PCIe Card


16 SE or 8 Diff 12-Bit 500k Samples/sec AI aggregate, 16 DIO, 4 AO PCIe Card


16 SE or 8 Diff 12-Bit 200k Samples/sec AI aggregate, 16 DIO, 4 AO PCIe Card


16 SE or 8 Diff 12-Bit 1M Samples/sec AI aggregate, 16 DIO PCIe Card


16 SE or 8 Diff 12-Bit 500k Samples/sec AI aggregate, 16 DIO PCIe Card


16 SE or 8 Diff 12-Bit 200k Samples/sec AI aggregate, 16 DIO PCIe Card

C68PS18L 68-pin SCSI 18″ shielded cable $39
STB-68 68-pin screw terminal board $69
Model Options
-T Extended Temperature Operation (-40° to +85°C)
-I 4-20mA inputs (16 Single-ended)
-ID 4-20mA inputs (8 Differential)
-PD Pull downs on digital bits
-Sxx -Special configurations
(10-50mA inputs, input voltage dividers, conformal coating, etc.)
-VCCIO Converts VCCio output to an input that accepts 1.65 to +5V for flexible digital voltage levels