U-PAD2 - External USB A/D Converter

U-PAD2 is an external 24-bit A/D converter that measures the voltages of chromatographic and electrochemical detectors. Integration frequency up to 400 Hz enables Fast GC application.

U-PAD2 uses the USB communication channel and thus is directly powered from the PC. The unit can be connected or disconnected anytime without the necessity to switch the computer off. The input connector is compatible with the internal INT7 board.

U-PAD2 is a modernized successor of the successful U-PAD A/D converter.

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Technical data:

	U-PAD2
Converter type	24 bit integrating, delta-sigma

Analog inputs	differential

Number of channels	2 fully independent, isolated from USB, (inputs share common ground)

Input impedance	>1 MOhm

Input range	unipolar or bipolar, each channel independentely switchable to 156, 1 250 or 12 123 mV

Integration frequency (Sample Rate)	6.3, 12.5, 25, 50, 100, 200, 400 samples per second for 50Hz mains frequency filter 7.5, 15, 30, 60, 120, 240, 480 samples per second for 60Hz mains frequency filter

Non-linearity	< 0.003 %

Temperature dependence	< 10 ppm/°C

Digital inputs	2 TTL (5 V)

Digital outputs	2 TTL (5V, maximum current load 20 mA), also as relay contacts (switching contacts rating: max. switching current 0.5 ADC, max. contact resistance 150mOhm, max. voltage 100V)

Dimensions	100 x 55 x 16 mm (w x h x d)

Weight	110 g

PC interface	USB

Power supply	from the PC via the USB cable

	U-PAD2

Typical noise free resolution for various acquisition speeds and input ranges:

	12 123 mV	1 250 mV	156 mV
6.3 Hz	21 bit	21 bit	20 bit

25 Hz	21 bit	21 bit	20 bit

100 Hz	19 bit	19 bit	19 bit
	10 V	1 250 mV	156 mV

Possible combinations:

	WIN Vista	WIN XP	WIN 2000	Win 98, Me
U-PAD2	Clarity Clarity Lite both since version 2.5	Clarity Clarity Lite both since version 2.4.4	Clarity Clarity Lite both since version 2.4.4	X
	WIN Vista	WIN XP	WIN 2000	Win 98, Me

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