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| | | SGNSIRION THE SENSOR COM PAM Y | | |
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| | | 2 Electrical Specifications | | |
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| | | The SDP1000 / SDP2000 differential pressure sensors manufacturers require a stable voltage supply of 5 V. Influence of the supply voltage variation on the offset and the sensitivity are given in Table 5. 2.2 Voltage Output The SDP1000 / SDP2000 features a voltage output from 0.25 V to 4.0 V (Figure 2, 3). An output voltage below 0.25 V indicates a negative differential pressure. This range is not calibrated however. The resistive load at the output pin should be larger than 20 kOhm. The capacitive load at the output pin must not be larger than 200 pF. If the design shows a larger capacity at the output pin an additional resistor is required in series at the output (e.g. 620 Ohm). | | |
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| | | Linear output Formula: P = Ifactor * (voltage*1) - 0.250)/3.750 | | Square Root output Formula: P = rfactor * (voltage(1) -0.250)A2 | | |
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| | | | | | | | | | | | Ifactor = | SDP1000-L05 | SDP1000-L | SDP2000-L | | | | Pascal | 125 | 500 | 3500 | | | | Inch water | 0.5 | 2 | 14 | | | | | | | | | | | | | | | | | | | | rfactor = | SDP1000-L05 | SDP1000-R | SDP2000-R | | | | Pascal | na | 35.55556 | 248.88889 | | | | Inch water | na | 0.14222 | 0.99556 | | | | | | | | | | | |
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| | | (1) voltage: measured output voltage in Volt. | | (1) voltage: measured output voltage in Volt. | | |
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| | | 4.00 | | |
| | | 4.00 | | |
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| | | 3.00 | | |
| | | 3.00 | | |
| | | Si CD > ci. "3 o | | |
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| | | > ag -S > "id o | | |
| | | 2.00 | | |
| | | 2.00 | | |
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| | | 1.00 | | |
| | | 1.00 | | |
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| | | 0.00 0 20 40 60 80 100 differential pressure [% full scale] Figure 2: Linear output at 5 Vdc supply of the SDP1000-L and the SDP2000-L. The fine lines indicate the maximum tolerances including a temperature variation from 0 to 50°C. | | |
| | | 0.00 0 20 40 60 80 100 differential pressure [% full scale] Figure 3: Square root extracted output of the SDP1000-R and the SDP2000-R at 5 Vdc supply. The fine lines indicate the maximum tolerances including a temperature variation from 0 to 50°C. | | |
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| | | www.sensirion.com | | v 3.1 June 2008 | | |
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