National Instruments NI USB-9237

Overvoltage protection

between any two terminals.....................± 30 V

Accuracy

Gain drift................................................10 ppm/°C max

Offset drift

2.5 V excitation...............................0.6 μV/V per °C

3.3 V excitation...............................0.5 μV/V per °C

5 V excitation..................................0.3 μV/V per °C

10 V excitation................................0.2 mV/V per °C

Channel-to-channel matching (calibrated)

Phase nonlinerarity

0 to 1 kHz........................................<0.001°

0 to 20 kHz......................................± 0.1°

Input delay..............................................4.8 μs + 38.4/fs

Passband

Frequency........................................0.45 · fs

Flatness........................................... 0.1 dB max

Error*

Percent of Reading

(Gain Error)

Percent of Range

(Offset Error)†

Calibrated max (0 to 60 °C) 0.20% 0.25%

Calibrated typ (25 °C, ±5 °C) 0.05% 0.05%

Uncalibrated max (0 to 60 °C) 0.60% 0.35%

Uncalibrated typ (25 °C, ±5 °C) 0.20 0.1%

* Excluding offset null or shunt calibration.

† Range equals 25 mV/V.

Input Signal Frequency

(fin)

Gain Phase

Typic al Maximum Maximum

0 to 1 kHz 0.15% 0.3% 0.125°/kHz · fin*

1 to 20 kHz 0.4% 1.1%

* fin is in kHz.