Measurement Specialties USB-1616HS-2 manual Specifications, Accuracy, Analog input specifications

Chapter 5

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		Successive approximation
Resolution		16 bits
Number of channels		16 single-ended/8 differential, software-selectable.
		Up to 48 additional analog inputs per module are available with the optional AI-EXP48
		module. Expansion channel features are the same as those of the main channels.
Input ranges (software and		Bipolar: ±10 V, ±5 V, ±2 V, ±1 V , ±0.5 V, ±0.2 V, ±0.1 V
sequencer programmable)
Maximum sample rate		1 MHz
Nonlinearity (integral)		±2 LSB maximum
Nonlinearity (differential)		±1 LSB maximum
A/D pacing		Onboard input scan clock, external source (APR)
Trigger sources and modes		See Table 8
Acquisition data buffer		1 MSample
Data transfer		DMA
Configuration memory		Programmable I/O
Maximum usable input		Range: ±10 V, ±5 V, ±2 V, ±1 V, ±0.5 V		10.5 V maximum
voltage + common mode
		Range: ±0.2 V, ±0.1 V		2.1 V maximum
voltage (CMV + Vin)
Signal to noise and distortion		72 dB typical for ±10 V range, 1 kHz fundamental
Total harmonic distortion		-80 dB typical for ±10 V range, 1 kHz fundamental
Calibration		Auto-calibration, calibration factors for each range stored onboard in non-volatile RAM.
CMRR @ 60 Hz		-70 dB typical DC to 1 kHz
Bias current		40 pA typical (0 °C to 35°C)
Crosstalk		-75 dB typical DC to 60 Hz; -65 dB typical @ 10 kHz
Input impedance		10 MΩ single-ended, 20 MΩ differential
Absolute maximum input		±30 V
voltage
Accuracy
		Table 2. Analog input accuracy specifications
Voltage range		Accuracy	Temperature coefficient		Noise (cts
		±(% of reading + %	±(ppm of reading + ppm range)/°C		RMS)
		range)
		23°C ±10 °C, 1 year
-10 V to 10 V		0.031% + 0.008%	14 + 8		2.0
-5 V to 5 V		0.031% + 0.009%	14 + 9		3.0
-2 V to 2 V		0.031% + 0.010%	14 +10		2.0
-1 V to 1 V	Note 1	0.031% + 0.02%	14 + 12		3.5	Note 2
-500 mV to 500 mV		0.031% + 0.04%	14 +18		5.5
-200 mV to 200 mV		0.036% + 0.075%	14 +12		8.0
-100 mV to 100 mV		0.042% + 0.15%	14 +18		14.0

45