Potentiometer measurement

Operation mode

The supply voltage is configurable via CoE,
0.5…5 V

Measuring range, nominal

-1…1 V/V

Measuring range, end value (full scale value)

1 V/V

Measuring range, technically usable

-1…1 V/V

PDO resolution

24 bit (incl. sign)

PDO LSB (Extended Range)

0.128 ppm

PDO LSB (Legacy Range)

0.119… ppm

Basic accuracy: Measuring deviation at 23°C, with averaging

< ±0.05%_FSV = ±500 ppm_FSV

Temperature coefficient (Terminal)

Tc_Terminal

< 15 ppm/K typ.

Input impedance ±Input 1

(Internal resistance)

Differential 4.1 MΩ || 11 nF typ.

CommonMode 1 MΩ || 40 nF typ.

Methodology: Resistor against -U_V, capacitance against SGND

Input impedance ±Input 2

(Internal resistance)

Differential 5 MΩ || 10 nF typ.

CommonMode 1.25 MΩ || 40 nF typ.

Methodology: Resistor against -U_V (+2.5V), capacitance against SGND

Offset/Zero Point deviation (at 23°C)

E_Offset

< 480 [ppm_FSV]

Gain/scale/amplification deviation (at 23°C)

E_Gain

< 100 [ppm]

Non-linearity over the whole measuring range

E_Lin

< 75 [ppm_FSV]

Repeatability

E_Rep

< 50 [ppm_FSV]

Noise (peak-to-peak, without filtering)

E_{Noise, PtP}

< 150 [ppm_FSV]

< 1172 [digits]

E_{Noise, RMS}

< 22 [ppm_FSV]

< 172 [digits]

Max. SNR

> 93.2 [dB]

Noisedensity @1kHz

< 0.31

Noise (peak-to-peak, with 50Hz filtering)

E_{Noise, PtP}

< 14 [ppm_FSV]

< 109 [digits]

E_{Noise, RMS}

< 2.5 [ppm_FSV]

< 20 [digits]

Max. SNR

> 112 [dB]

Common-mode rejection ratio (without filtering)³

DC:
< 3  typ.

50 Hz:
< 9  typ.

1 kHz:
< 140  typ.

Common-mode rejection ratio (with 50Hz filtering)³

DC:
< 3  typ.

50 Hz:
< 0.2  typ.

1 kHz:
< 5  typ.

Largest short-term deviation during a specified electrical interference test

±0.2%_FSV = ±2000 ppm_FSV typ.