Omega 1002 manual Suggested Settling Times

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Before performing A/D conversions, the JP1 jumper should be set for single-ended or differential.

The software driver supports both polling and interrupt driven A/D, however, polling is the simplest way to perform an A/D conversion.

The settling time of multiplexer depends on the impedance of the signal source. Because the driver does not incorporate the settling time, the user needs to program a delay when switching from one channel to another or when changing gains.

Suggested Settling Times

One settling time is suggested for all ranges of the OME-PCI-1002L. The settling time for the OME-PCI-1002H is based on the analog input range. The table below shows the suggested settling times for each range.

OME-PCI-1002L Settling Time: 33 ∝seconds for all ranges

OME-PCI-1002H Settling Time

Input Range

Settling Time

± 10V

23 ∝S

± 5V

28 ∝S

± 0.1V

140 ∝S

± 0.01V

1300 ∝S

The software driver provides a machine independent timer, P1002_Delay(), for settling time delay. If the user calls P1002_Delay(), counter 0 will be reserved and can not be used as a user programmable timer/counter.

The A/D converter requires a trigger signal to start an A/D conversion cycle. The OME-PCI-1002 supports three trigger modes, software, pacer and external trigger.

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Contents User’sGuide Servicing North America Table of Contents Software and Demo Program Diagnostic Program General Description IntroductionX86 System Block DiagramFeatures Specifications Power ConsumptionAnalog Inputs 4 A/D Trigger Methods 3 D/I and D/OInterrupt Channel Programmable Timer/CounterOME-PCI-1002 series multifunction cards ApplicationsRelease Notes Product Check ListBoard Layout Hardware ConfigurationA/D Calibration Jumper SettingOME-PCI-1002 System Function Block System Block DiagramOME-DB-8225 OME-DB-37 Daughter BoardsOME-DB-16P Isolated Input Board OME-DB-16R Relay Board Analog Input Signal Connection Page Page Signal Shielding Jumper Settings Connectors Page O Registers How to Find the I/O AddressPage I/O Address Map Section 8254 Registers Status Register Clear Interrupt Interrupt Source Selection General Control RegisterTrigger Method Selection Digital I/O Function Operation A/D trigger 8254 TimerSymbol Name Minimum Maximum CPU A/D ConversionSuggested Settling Times 1 A/D Conversion Trigger Modes Software Trigger and Polling Techniques Page Page Software and Demo Program Driver Plug & Play Test Power-ON Plug & Play TestA/D Test D I/O TestWARRANTY/DISCLAIMER Temperature
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