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IO109: 24-bit Analog Input Module

High-resolution 24-bit sigma-delta analog module with 12 differential analog input channels and Simulink driver blocks

This I/O module is a high-end, low-noise analog module with 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. Each converter integrates a 2-pole lowpass analog filter with 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 modules can be synchronized to form a high channel count, high-resolution A/D subsystem. Synchronization can also be accomplished with analog output modules like the IO107 and IO108 to form a phase-locked I/O subsystem ideal for audio applications.

Analog Inputs

  • 12 differential channels, simultaneous sampling, dedicated Sigma-Delta A/D converter per channel
  • 24-bit resolution
  • 200KSPS maximum A/D sampling frequency (DMA)
  • Oversampling factor of up to 256
  • Selectable ±10V, ±5V, ±2.5V voltage range (software-selectable)
  • Inherent anti-aliasing filtering
  • Up to 93dB signal-to-noise ratio
  • Inter-module synchronization and synchronization with analog output modules
  • Auto-calibration of entire analog input section
  • Simulink Real-Time™ analog input driver block
Form factor PMC
Power requirements 6W typical, 7.5W maximum
PCI bus 32 bit/32 MHz
EMI EMI shield on component side
Connector 68-way SCSI3
Cable connectors: Tyco Electronics
Board connector: Tyco Electronics part no. 5749069-7
Operating temperature 0 to 65°C (extended temperature variants: -40°C to +85°C)
Relative humidity 0 to 80%, non-condensing
Analog inputs (at 25°C)  
Configuration 12 differential analog input channels Dedicated Sigma-Delta A/D converter per channel, DC-coupled
A/D resolution 24 bits
A/D sample frequency 200 kSPS per channel maximum (DMA)
Sampling Mode Simultaneous, all active input channels, Sigma-Delta conversion
Voltage Ranges Driver configurable as ±10V, ±5V or ±2.5V
Input impedance 1 MOhm typical in parallel with 20pF, 2MOhm line-to-line
Common mode rejection 80dB to 1kHz, 60dB to 50kHz, typical
SINAD (signal to noise-and-distortion ratio) 93dB typical to 10kHz input bandwidth, 85kHz typical to 50kHz
Input bandwidth (-3dB) DC to typically 49% of selected sample rate for sample rates to 100ksps, or to 35% of sample rate from 100ksps to 200ksps. Typically DC to 70kHz overall
Overvoltage protection ±25V transients with power applied, ±45 Volts with power removed
DC accuracy (maximum composite error after autocalibration) ±10V range: ± 0.5mV (midscale zero accuracy), Gain accuracy at Fsamp: ± 0.9% (2-4ksps), ± 0.3% (4-15ksps), ± 0.1% (15-200ksps)
±5V range: ± 0.3mV (midscale zero accuracy), Gain accuracy at Fsamp: ± 0.9% (2-4ksps), ± 0.3% (4-15ksps), ± 0.1% (15-200ksps)
±2.5V range: ± 0.1mV (midscale zero accuracy), Gain accuracy at Fsamp: ± 0.9% (2-4ksps), ± 0.3% (4-15ksps), ± 0.1% (15-200ksps)
Mean time between failures (MTBF)* 233,201 hours
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
  • 1 x IO109
  • 1 x shielded round 68-way SCSI-III cable, 1.82m (6ft) long
  • 1 x 68-pin spring-loaded terminal board with DIN-rail mount
  • Driver block library for Simulink Real-Time™
  • Installation into real-time target machine
201099 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

  • I/O module installed into real-time target machine
  • Cable
  • Terminal board
  • Simulink driver blocks
  • Test models
  • Comprehensive documentation


Supported target machines