High-resolution 24-bit sigma-delta analog module with 12 differential analog input channels

This I/O module is a high-end low-noise analog module with a very high input resolution of 24-bit. Each analog input channel is equipped with its own dedicated DC-coupled Sigma-Delta A/D converter for sample rates up to 200kSamples/s. The oversampling factor is up to 128. Each converter integrates a 2-pole lowpass analog filter with software selectable cut-off frequency of either 40kHz or 270kHz. The signal-to-noise ratio is up to 93dB.

Select this I/O module for precision voltage measurements, acquisition of audio signals, and other high dynamic-range signal measurements. Several IO109 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 say for audio applications.

Each IO109 I/O module comes with xPC Target driver blocks and Simulink test models, an external shielded 68-pin I/O cable and a terminal board for easy access of all physical I/O signals, and comprehensive documentation.

For audio applications Speedgoat furthermore developed the IO109-XLR-Panel option replacing the cable and terminal board.

This I/O module in the PMC form factor and can be used in any Speedgoat real-time target machine with the exception of the Classic real-time target machine.

Highlights

Analog inputs

• 12 differential channels, simultaneous sampling, dedicated Sigma-Delta A/D converter per channel
• 24-bit resolution
• Up to 200kSamples/s
• 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
• xPC Target analog input and frame input driver block

General

• Form factor: 32-bit 32MHz PMC (PCI)
• Operating temperature: 0 to 65ºC
• Relative operating humidity: 0 to 80%, non-condensing
• EMI: EMI shield on component side
• Power consumption: 6W typical, 7.5W maximum

Analog input section (at 25ºC)

• Configuration: 12 differential analog input channels, dedicated Sigma-Delta A/D converter per channel, DC-coupled
• Sample rate: 2k to 200k samples per second (ksps) per channel
• Oversampling factor:

2-50ksps: x128

50-100ksps: x64

100-200ksps: x32

• Sampling mode: Simultaneous, all active input channels, Sigma-Delta conversion
• Voltage ranges: Software selectable 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
• Common mode range: ±11V with zero normal-mode input
• Overvoltage protection: ±25V transients with power applied, ±45 Volts with power removed
• 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
• Passband ripple: ±0.06dB maximum
• Phase skew: Typically less than 55ns (0.1° for Fsig=5kHz), with Fsig/Fsamp < 0.35; channel-channel, excluding noise, with high-frequency image filter
• ADC stopband:

2-50ksps: 0.58 Fsamp (threshold), 93dB (rejection)

50-100ksps: 0.68 Fsamp (threshold), 90dB (rejection)

100-200ksps: 0.78 Fsamp (threshold), 95dB (rejection)

• Anti-alias filtering: Each ADC provides linear-phase digital anti-alias filtering indicated for "ADC stopband". A 2-pole lowpass analog filter in each channel provides a software-selectable cutoff frequency of either 40kHz or 270kHz, and suppresses images from the digital filter. Optional alternative frequencies are available.
• Dynamic range: 100dB typical 2ksps to 100ksps, 80 dB from 100ksps to 200ksps
• SINAD (signal to noise-and-distortion ratio): 93dB typical to 10kHz input bandwidth, 85kHz typical to 50kHz
• Inter-channel crosstalk: -96dB typical to 50kHz
• DC accuracy (mean 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)

Pricing information
We don't publish pricing information on our Web page. Upon request by e-mail or phone we provide a complete price list covering our entire product portfolio in various currencies. Nevertheless, 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.