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High-Resolution 24-bit Sigma-Delta Analog I/O Module

This I/O module is a high-end, low-noise analog module with 12 input channels and an input resolution of 24 bits. Each analog input channel is equipped with its own dedicated DC-coupled Sigma-Delta A/D converter for sample rates up to 200 kSamples/s. Furthermore, each converter integrates a 2-pole lowpass analog filter with a software-selectable cut-off frequency of either 40 kHz or 270 kHz.

Select this I/O module for precision voltage measurements, acquisition of audio signals, and other high dynamic-range signal measurements. Several IO109 I/O modules can be synchronized to form a high-channel-count, high-resolution A/D subsystem. Synchronization can also be accomplished with analog output modules such as the IO107 and IO108 to form a phase-locked I/O subsystem ideal for audio applications.

Key Features

  • 12 differential channels, simultaneous sampling, dedicated Sigma-Delta A/D converter per channel
  • 24-bit resolution
  • 200 kSPS maximum A/D sampling frequency (DMA)
  • Software-selectable ±2.5 V, ±5 V, ±10 V voltage range (one setting for all channels)
  • Up to 93 dB signal-to-noise ratio
  • Inter-module synchronization and synchronization with analog output modules
  • Simulink® Real-Time™ analog input driver blocks
Form factor PMC
Power requirements 6 W (typ.), 7.5 W (max.)
Bus 32 bit/33 MHz, Revision 2.3 of PCI specification
Connector 68-pin connector (equivalent to AMP #749621-7)
Analog inputs  
Number of inputs 12 differential analog input channels
A/D resolution 24 bit
Sample rate 2 – 200 kSPS
Voltage ranges Software-selectable ±2.5 V, ±5 V, ±10 V (one setting for all channels)
Oversampling Up to 256 depending on the sample rate
Anti-alias filtering 2-pole Butterworth lowpass analog filter with software-selectable cutoff frequency of either 40 kHz (low) or 270 kHz (high)
Input impedance 1.0 MΩ, 20 pF
Overvoltage protection ±25 V transients with power applied; ±45 V with power removed
Phase skew Less than 55 ns (typ.) with Fsig < 0.35*Fsamp
Dynamic range 100 dB typical from 2 kSPS to 100 kSPS
SINAD 93 dB typical to 10 kHz input bandwidth
Operating temperature Standard: 0 °C to +70 °C
Extended: -40 °C to +80 °C
Relative humidity 0 to 95 %, non-condensing
MTBF (Mean Time Between Failure) - MTBF values shown are based on calculation according to MIL-HDBK-217F and MIL-HDBK-217F Notice 2; Environment: GB 20°C. The MTBF calculation is based on component FIT rates provided by the component suppliers. If FIT rates are not available, MIL-HDBK-217F and MIL-HDBK-217F Notice 2 formulas are used for the FIT rate calculation.
Item ID Product Name Components
20109X* IO109
  • 1x IO109 I/O module
  • 1x 68-pin male SCSI3 to 68-pin male MDR cable (6 ft/1.82 m)
  • 1x 68-Pin Female MDR Terminal Board
  • Driver block library for Simulink® Real-Time™
  • Comprehensive documentation and Simulink® example models
  • Installation into the real-time target machine
201099X IO109-ExtTemp
  • Increases temperature range of IO109 from 0 to +70ºC
    to -40ºC to +85ºC. Available for all IO109 versions

Key to X in Item ID
Please replace the X with the code number of the specific target machine into which this I/O module shall be installed:

  • 5 = Mobile real-time target machine
  • 6 = Performance real-time target machines
  • 8 = Baseline real-time target machine

Pricing information
We don't publish pricing information on our website. Upon request by e-mail or phone we can provide a complete price list covering our entire product portfolio in various currencies. We recommend that you get in touch with us to discuss your specific needs. We can then quickly provide you with a tailored quotation including technical and pricing information.


Included in delivery

Common Applications

Supported target machines


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