Measurement Computing IOtech 640 Series - Manual (Page 72)

Specifications are subject to change without notice.
11-2 Specifications 879592 IOtech 640 and 650 Series
High-pass filter (AC coupling cutoff):
640e; 640u: 1.0Hz
650e; 650u: 0.1Hz
Figure II. Measurement High Pass Filter Response
Input ranges:
640e; 640u: ±10V peak
650e; 650u: ±40V peak
Input protection: ±60V max without damage
Over-range indication: Software
Low-pass filter (software programmable per channel)
Figure III. 640 Measurement Delay vs. Frequency DC Coupled
Figure IV. 640 Measurement Delay vs. Frequency AC Coupled
Figure V. 650 Measurement Delay vs. Frequency DC Coupled
Figure VI. 650 Measurement Delay vs. Frequency AC Coupled
Type: Anti-Aliasing hardware 3-pole 360kHz, Software selectable FIR filter
Figure VII. Measurement Antialiasing Filter Performance
Any unwanted signals above 27MHz is lost in the noise floor of a 64k FFT.
Amplitude accuracy:
640e / 640u 650e / 650u
AC at 1kHz 0.07dB typ ±0.12dB max 0.1dB typ ±0.15dB max
DC (0.03% of reading + 2mV) (0.2% of reading + 15mV)
Amplitude -3dB: 0.49 x sample rate
Amplitude flatness: 0.05 dB typ ±0.10dB max DC to 20kHz
Figure X. Analog Measurement Flatness
Total harmonic distortion: -100dB typical 1kHz, -97dB typical 10kHz
Figure IX. Measurement THD+N
SFDR including harmonics: 108dB typical DC to 50kHz
SFDR (@-60dB): 128dB typical DC to 50kHz
Figure XI. 640 SFDR Full-Scale is +20dBV; Input is -40dBV
Figure XII. 650 SFDR Full-Scale is +29dBV; Input is -30dBV
Channel-to-channel crosstalk: <-100dB at 1kHz
Figure XIII. 640 Channel-to-Channel Cross Talk
Figure XIV. 650 Channel-to-Channel Cross Talk
Channel-to-channel phase matching:
640e; 640u: <0.04º / kHz + 0.08º
650e; 650u: <0.06º / kHz + 0.1º
Figure XV. 640 Phase-Matching vs. Frequency, AC-Coupled
Figure XVI. 650 Phase-Matching vs. Frequency, AC-Coupled