Measurement Computing USB-1608HS-2AO - Manual (Page 24)

24
Chapter 4
Specifications
Typical for 25 °C unless otherwise specified.
Specifications in italic text are guaranteed by design.
Analog input
Table 1. Analog input specifications
Parameter Conditions Specification
A/D converter type 16-bit successive approximation type
Number of channels Eight differential
Eight single-ended
Input configuration Individual A/D per channel
Sampling method Simultaneous
Analog input modes Power up and reset state CHx_H and CHx_L inputs are disconnected from their
screw terminal pins and internally connected to GND
(recommended configuration for unused inputs).
Single-ended CHx_H inputs are connected directly to their screw
terminal pins.
CHx_L inputs are disconnected from their screw
terminal pins and internally connected to GND.
Differential CHx_H and CHx_L inputs are connected directly to
their screw terminal pins.
Absolute maximum input
voltage CHx IN to GND.
TRIG_IN to GND
±25 V maximum (power on)
±15 V maximum (power off)
Input impedance CHx IN 1 GΩ (power on)
1.5 kΩ (power off)
Input bandwidth (-3 dB) All input ranges 330 kHz
Input leakage current ±25 pA
Input capacitance 50 pf
Input ranges Software-selectable per channel ±10 V, ±5 V, ±2 V, ±1 V
A/D pacing Onboard A/D clock, external source (SYNC_IN). See
Table 9 on page 28.
A/D trigger source TRIG_IN input. See Table 8 on page 27.
A/D trigger modes External analog. See Table 8 on page 27.
Maximum working voltage
(signal + common mode) ±0.05% FSR maximum.
Sampling rate 0.009 S/s to 250 kS/s, software-programmable
Throughput Software-paced 33 to 8000 S/s all channels, system-dependent
Scan to PC memory 250 kS/s per channel maximum (throughput rate may be
limited on USB 1.1 ports).
Resolution 16 bits
Differential non-linearity
(Note 1) Calibrated ±2.0
Un-calibrated ± 0.5 LSB typical.
±1.0 LSB maximum.
CMRR (60 Hz) ±10 V range 81 db minimum
±5 V range 81 db minimum
±2 V range 92 db minimum
±1 V range 92 db minimum