Measurement Specialties PCI-DAS64/M2/16 manual Specifications, Analog input specifications

Chapter 6

Specifications

Typical for 25 °C unless otherwise specified.

Specifications in italic text are guaranteed by design.

Analog input

		Table 1. Analog input specifications
A/D converter type	Sub-ranging sampling ADC
Resolution	16 bits
Number of channels	32 differential or 64 single-ended, software selectable
Input ranges	±5 V, ±2.5 V, ±1.25 V, ±0.625 V, 0 to 5 V, 0 to 2.5 V, 0 to 1.25 V
(software programmable)
Polarity	Unipolar/bipolar, software selectable
A/D pacing	!	Internal counter – ASIC
(software programmable)	!	External source (A/D external pacer). The total number of sample clocks must be at least
		5 greater than the total number of samples desired. This is required to accommodate the
		pipelined architecture of the ADC.
	!	Software polled
Burst mode	Software selectable option. Valid for a fixed input range only.
	Burst rate = 667 nS.
A/D gate sources	!	External digital (A/D pacer gate)
	! External analog (analog trigger in)
A/D gating modes	External digital: Programmable, active high or active low, level or edge
	External analog: Software-configurable for:
	! Above or below reference
	! Positive or negative hysteresis
	! In or out of window.
	Trigger levels set by DAC0 and/or DAC1.
A/D trigger sources	!	External digital (A/D start trigger in and A/D stop trigger in)
	! External analog (Analog Trigger In)
A/D triggering modes	! External digital: Software-configurable for rising or falling edge.
	! External analog: Software-configurable for positive or negative slope. Trigger levels set
		by DAC0 and/or DAC1.
	! Pre-/post-trigger: Unlimited number of pre-trigger samples, 16 Meg post-trigger
		samples. Compatible with both digital and analog trigger options.
Data transfer	!	From 8 k RAM buffer via DMA (demand or non-demand mode) using scatter gather.
	!	Programmed I/O
Configuration memory	8 K words
Channel/gain queue	Up to 8 K elements. Programmable channel, gain, and offset.
A/D conversion time	500 nS
Calibration	Auto-calibration, calibration factors for each range stored on board in non-volatile RAM.

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