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AD5421 Datasheet(PDF) 4 Page - Analog Devices |
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AD5421 Datasheet(HTML) 4 Page - Analog Devices |
4 / 32 page AD5421 Rev. 0 | Page 4 of 32 Parameter1 Min Typ Max Unit Test Conditions/Comments OUTPUT CHARACTERISTICS3 Loop Compliance Voltage4 LOOP− + 5.5 V REGOUT < 5.5 V, loop current = 24 mA LOOP− + 12.5 V REGOUT = 12 V, loop current = 24 mA Loop Current Long-Term Stability 100 ppm FSR Drift after 1000 hours at TA = 125°C, loop current = 12 mA, internal RSET 15 ppm FSR Drift after 1000 hours at TA = 125°C, loop current = 12 mA, external RSET Loop Current Error vs. REGOUT Load Current 1.2 μA/mA Loop current = 12 mA, load current from REGOUT = 5 mA Resistive Load 0 2 kΩ See Figure 19 for a load line graph Inductive Load 50 mH Stable operation Power Supply Sensitivity 0.1 μA/V Loop current = 12 mA Output Impedance 12 400 MΩ Output TC 3 ppm FSR/°C Loop current = 12 mA, internal RSET 1 ppm FSR/°C Loop current = 12 mA, external RSET Output Noise 0.1 Hz to 10 Hz 50 nA p-p 500 Hz to 10 kHz 0.2 mV rms HART bandwidth; measured across 500 Ω load Noise Spectral Density 195 nA/√Hz At 1 kHz 256 nA/√Hz At 10 kHz REFERENCE INPUT (REFIN PIN)3 Reference Input Voltage5 2.5 V For specified performance DC Input Impedance 75 800 MΩ REFERENCE OUTPUTS REFOUT1 Pin Output Voltage 2.498 2.5 2.503 V TA = 25°C Temperature Coefficient 1.5 4 ppm/°C C grade 2 10 ppm/°C B grade Output Noise (0.1 Hz to 10 Hz)3 7.5 μV p-p Noise Spectral Density3 245 nV/√Hz At 1 kHz 70 nV/√Hz At 10 kHz Output Voltage Drift vs. Time3 200 ppm Drift after 1000 hours at TA = 125°C Capacitive Load3 10 nF Stable operation Load Current3, 6 4 mA Short-Circuit Current3 6.5 mA Short circuit to COM Power Supply Sensitivity3 2 12 μV/V Thermal Hysteresis3 285 ppm First temperature cycle 5 ppm Second temperature cycle Load Regulation3 0.1 0.2 mV/mA Measured at 0 mA and 1 mA loads Output Impedance 0.1 Ω REFOUT2 Pin Output Voltage 1.18 1.227 1.28 V TA = 25°C Output Impedance 72 kΩ REGOUT OUTPUT Voltage regulator output Output Voltage 1.8 12 V See Table 10 Output Voltage TC3 110 ppm/°C Output Voltage Accuracy −4 ±2 +4 % Externally Available Current3, 6 3.15 mA Assuming 4 mA flowing in the loop and during HART communications Short-Circuit Current 23 mA Line Regulation3 500 mV/V Internal NMOS 10 mV/V External NMOS Load Regulation3 8 mV/mA |
Similar Part No. - AD5421_11 |
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Similar Description - AD5421_11 |
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