Specifica ons
All specifica ons are subject to change without no ce.
Analog input
Table 1. Analog input specifica ons
Parameter
Condi on
Specifica on
Number of
channels
4 analog input channels
ADC resolu on
24 bits
Type of ADC
Delta-Sigma (with analog prefiltering)
Sampling mode
Simultaneous
Internal master
mebase (fM)
Frequency
13.1072 MHz
Accuracy
±50 ppm max
Data rate range (fs)
1.652 kS/s min
51.2 kS/s max
Data rates (fs)
(fM ÷ 256)/n, where n is any integer from 1 to 31
Input coupling
AC/DC; so ware-selectable
AC cutoff
frequency
–3 dB
0.5 Hz
–0.1 dB
4.6 Hz max
Input range
±5 V
AC voltage full-
scale range
±5 Vpk min
±5.1 Vpk typ
±5.2 Vpk max
Common-mode
voltage range
AI– to earth
ground
±2 V max
IEPE excita on
current;
so ware-selectable
on/off
2.0 mA min
2.1 mA typ
Power-on glitch
90 μA for 10 μs
IEPE compliance
voltage
(Note 1)
19 V max
Overvoltage
protec on, with
respect to chassis
ground
Signal source
connected to AI+
and AI–
±30 V
Low-impedance
source
connected to AI+
and AI–
–6 V to 30 V
Input delay
(40 + 5/512)/fs + 2.6 μs
Gain dri
0.14 mdB/°C (16 ppm/°C) typ
0.45 mdB/°C (52 ppm/°C) max
Offset dri
19.2 μV/°C typ
118 μV/°C max
Channel-to-channel Phase (fin in kHz)
fin × 0.045° + 0.04 max
WebDAQ 504 User's Guide
page 19
