Measurement Computing USB-2404-10 - Manual (Page 15)

15
Chapter 4
Specifications
All specifications are subject to change without notice.
Typical for the range 0 to 60 °C unless otherwise noted.
All voltages are relative to the CH
– signal on each channel unless otherwise noted.
Analog input
Table 1. Analog input specifications
Parameter Conditions Specification
Number of channels 4
A/D converter resolution 24-bit
A/D converter type Delta-Sigma with analog pre-filtering
Sampling mode Simultaneous
Sample rate range ) Minimum: 1.613 kS/s
Maximum: 50 kS/s (Note 1)
Sample rates )
Internal master timebase ) Frequency: 12.8 MHz
Accuracy: ±100 ppm maximum
Input voltage ranges CH+ to CH– ±10 V, nominal
±10.52 V, typical
±10.3 V, minimum
Overvoltage protection ±100 V
Input coupling DC
Input impedance CH+ to CH– 1 MΩ
Input noise 70 µV rms
Gain drift ±5 ppm/ºC
Offset drift ±24 µV/ºC
Post calibration gain match channel-to- channel, 20 kHz 0.22 dB maximum
Crosstalk 1 kHz –130 dB
Phase mismatch channel-to- channel 0.075º/kHz maximum
Phase nonlinearity = 50 kS/s 0.11º maximum
Input delay 38.4 +3 µs
Passband frequency 0.453 ·
Passband flatness = 50 kS/s ±100 mdB maximum
Stopband frequency 0.547 ·
Stopband rejection 100 dB
Alias-free bandwidth 0.453 ·
–3 dB pre-filter bandwidth = 50 kS/s 24.56 kHz
Common mode rejection ratio
(CMRR) = 60 Hz 126 dB
Spurious free dynamic range
(SFDR) 1 kHz, –60 dBFS –128 dBFS
Total harmonic distortion 1 kHz, –1 dBFS –99 dB
1 kHz, –20 dBFS –105 dB
Note 1: Full performance requires connections to a USB 2.0 Hi-Speed host controller and USB 2.0 high-
speed hubs.) The maximum sample rate may be lower on USB 1.1 ports.