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AD5421 Datasheet(PDF) 5 Page - Analog Devices |
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AD5421 Datasheet(HTML) 5 Page - Analog Devices |
5 / 32 page AD5421 Rev. 0 | Page 5 of 32 Parameter1 Min Typ Max Unit Test Conditions/Comments Inductive Load 50 mH Stable operation Capacitive Load 2 10 μF Stable operation ADC ACCURACY Die Temperature ±5 °C VLOOP Input ±1 % DVDD OUTPUT Can be overdriven up to 5.5 V Output Voltage 3.17 3.3 3.48 V Externally Available Current3, 6 3.15 mA Assuming 4 mA flowing in the loop and during HART communications Short-Circuit Current 7.7 mA Load Regulation 11 mV/mA Measured at 0 mA and 3 mA loads DIGITAL INPUTS3 SCLK, SYNC, SDIN, LDAC Input High Voltage, VIH 0.7 × IODVDD V Input Low Voltage, VIL 0.25 × IODVDD V Hysteresis 0.21 V IODVDD = 1.8 V 0.63 V IODVDD = 3.3 V 1.46 V IODVDD = 5.5 V Input Current −0.015 +0.015 μA Per pin Pin Capacitance 5 pF Per pin DIGITAL OUTPUTS3 SDO Pin Output Low Voltage, VOL 0.4 V Output High Voltage, VOH IODVDD − 0.5 V High Impedance Leakage Current −0.01 +0.01 μA High Impedance Output Capacitance 5 pF FAULT Pin Output Low Voltage, VOL 0.4 V Output High Voltage, VOH IODVDD − 0.5 V FAULT THRESHOLDS ILOOP Under ILOOP – 0.01% FSR mA ILOOP Over ILOOP + 0.01% FSR mA Temp 140°C 133 °C Fault removed when temperature ≤ 125°C Temp 100°C 90 °C Fault removed when temperature ≤ 85°C VLOOP 6V 0.3 V Fault removed when VLOOP ≥ 0.4 V VLOOP 12V 0.6 V Fault removed when VLOOP ≥ 0.7 V POWER REQUIREMENTS REGIN 5.5 52 V With respect to LOOP− IODVDD 1.71 5.5 V With respect to COM Quiescent Current 260 300 μA 1 Temperature range: −40°C to +105°C; typical at +25°C. 2 Total unadjusted error is the total measured error (offset error + gain error + linearity error + output drift over temperature) after factory calibration of the AD5421. System level total error can be reduced using the offset and gain registers. 3 Guaranteed by design and characterization; not production tested. 4 The voltage between LOOP− and REGIN must be 5.5 V or greater. 5 The AD5421 is factory calibrated with an external 2.5 V reference connected to REFIN. 6 This is the current that the output is capable of sourcing. The load current originates from the loop and, therefore, contributes to the total current consumption figure. |
Número de pieza similar - AD5421_11 |
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Descripción similar - AD5421_11 |
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