iDAQ-817_821 User Manual
20
A.1
Analog Input (iDAQ-817)
Channels:
8 differential
Analog-to-digital converter (ADC) resolution:
16 bits
Analog-to-digital converter (ADC) type:
Successive approximation (SAR)
Input range:
±10 V or ±20 mA, each channel can be configured independently
by software
Input common-mode voltage range:
±275 V max.
Input coupling:
DC
Input impedance
–
Differential, voltage measurement:
800 kΩ
–
Common-mode, voltage measurement:
200 kΩ
–
Current measurement:
500 Ω
Isolation protection:
600 V
RMS
Operation mode:
Instant or buffered, software configurable
Buffered output
–
Sample rate:
(200 / n) kHz max., where n is the number of enabled chan
-
nels, software configurable
–
Convert clock rate:
200 kHz
–
Internal data buffer (FIFO) size:
512 samples
Absolute accuracy
–
Voltage input
Operating temperature within: ±5°C of last
auto-calibration temperature: ±0.01% of full-scale range max.
Over full operating temperature range: ±0.05% of full-scale range max.
–
Current input
Operating temperature within: ±5°C of last
auto-calibration temperature: ±0.1% of full-scale range max.
Over full operating temperature range: ±0.5% of full-scale range max.
Temperature drift
–
Offset drift:
25 ppm/°C
–
Gain drift:
15 ppm/°C
Bandwidth (-3dB):
78 kHz
DC performance
–
Idle channel noise:
0.34 mV
RMS
/0.7A
RMS
–
Effective resolution:
15.8 bits
AC performance
–
Signal-to-noise ratio (SNR):
86 dB
–
Total harmonic distortion (THD):
-98 dB
–
Total harmonic distortion plus noise (THD+N):
-86 dB
–
Effective number of bits (ENOB):
14.0 bits
–
Spurious-free dynamic range (SFDR):
103 dB
–
Crosstalk:
-85 dB
Summary of Contents for iDAQ-817
Page 1: ...User Manual iDAQ 817 iDAQ 821 Analog Input and output Industrial DAQ Modules ...
Page 8: ...iDAQ 817_821 User Manual viii ...
Page 11: ...Chapter 1 1 Start Using iDAQ 817 821 ...
Page 15: ...Chapter 2 2 Installation Guide ...
Page 20: ...iDAQ 817_821 User Manual 10 ...
Page 21: ...Chapter 3 3 Function Details ...
Page 29: ...Appendix A A Specifications ...
Page 33: ...Appendix B B System Dimensions ...
Page 35: ...25 iDAQ 817_821 User Manual Appendix B System Dimensions ...