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SDP2000 Datasheet(PDF) 4 Page - List of Unclassifed Manufacturers |
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SDP2000 Datasheet(HTML) 4 Page - List of Unclassifed Manufacturers |
4 / 10 page www.sensirion.com v5 February 2013 4/10 2 Electrical Specifications 2.1 Power Supply The SDP1000 / SDP2000 differential pressure sensors 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. Exempt from this statement is the SDP1000-L025, which features a fully bidirectional calibration with 0.2 to 4.0 V output. 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). Linear output Formula: P = lfactor * (voltage(1) – 0.250)/3.750 lfactor = SDP1000-L05 SDP1000-L SDP2000-L Pascal 125 500 3500 Inch water 0.5 2 14 (1) voltage: measured output voltage in Volt. For bi-directional SDP1000-L025 Formular: P=lfactor * (voltage – 2.10)/1.90 lfactor = 62 Pa or 0.25 Inch water Square Root output Formula: P = rfactor * (voltage(1) -0.250)^2 rfactor = SDP1000-R Pascal 35.55556 Inch water 0.14222 (1) voltage: measured output voltage in Volt. 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. 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 . 0.00 1.00 2.00 3.00 4.00 0 20 40 60 80 100 differential pressure [% full scale] 0.00 1.00 2.00 3.00 4.00 0 20 40 60 80 100 differential pressure [% full scale] SDP1000-L / SDP2000-L SDP1000-R / SDP2000-R |
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