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AD74115H Datasheet(PDF) 6 Page - Analog Devices |
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AD74115H Datasheet(HTML) 6 Page - Analog Devices |
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6 / 113 page  Data Sheet AD74115H SPECIFICATIONS analog.com Rev. 0 | 6 of 113 CURRENT INPUT EXTERNALLY POWERED AND CURRENT INPUT EXTERNALLY POWERED WITH HART AVDD = +6 V to +28.8 V, AVSS = −2.5 V to −18 V, AGND = DGND = 0 V, REFIN = +2.5 V (ideal), DVCC = +2.7 V to +5.5 V, AVCC = +4.5 V to +5.5 V, and all specifications are at TA = −40°C to +105°C, unless otherwise noted. RSENSE = 100 Ω (Ideal), and CLOAD = 4.7 nF per the recommended configuration. Table 4. Current Input Externally Powered and Current Input Externally Powered with HART Parameter Min Typ Max Unit Test Conditions/Comments CURRENT INPUT Input Resolution 16 Bits Input Range 0 25 mA Sensed across the external 100 Ω resistor Screw Terminal Voltage 0 V Short-Circuit Current Limit 25 35 mA Nonprogrammable ACCURACY TUE1 −0.1 +0.1 % FSR TUE at 25°C1 −0.05 +0.05 % FSR INL −4 ±2 +4 LSB Linearity specified from 0.1 mA to 25 mA Offset Error −4 +4 LSB Offset Error at 25°C −1.5 +1.5 LSB Gain Error1 −250 +250 ppm FSR Gain Error at 25°C1 −150 +150 ppm FSR OTHER INPUT SPECIFICATIONS DC PSRR2 In order of noise Input Impedance (Without HART Termination) 165 Ω Current input, externally powered selected, including 100 Ω RSENSE Input Impedance (with HART Resistive Termination) 230 330 Ω Current input, externally powered with HART selected, including 100 Ω RSENSE Compliance (Without HART Termination)2 4.2 V Current input, externally powered selected, and minimum voltage required at the I/OP screw terminal to sink 25 mA Compliance (with HART Resistive Termination)2 6.6 V Current input, externally powered with HART selected, and minimum voltage required at the I/OP screw terminal to sink 20 mA 1 RSENSE accuracy directly impacts the TUE and gain error. 2 Guaranteed by design and characterization. CURRENT INPUT LOOP POWERED AND CURRENT INPUT LOOP POWERED WITH HART AVDD = +6 V to +28.8 V, AVSS = −2.5 V to −18 V, AGND = DGND = 0 V, REFIN = +2.5 V (ideal), DVCC = +2.7 V to +5.5 V, AVCC = +4.5 V to +5.5 V, and all specifications are at TA = −40°C to +105°C, unless otherwise noted. RSENSE = 100 Ω (iIdeal), and CLOAD = 4.7 nF per the recommended configuration. Note that the headroom specification for AVDD must be considered when setting supply voltages. Table 5. Current Input Loop Powered and Current Input Loop Powered with HART Parameter Min Typ Max Unit Test Conditions/Comments CURRENT INPUTS Input Resolution 16 Bits Input Range 0 25 mA Sensed across external 100 Ω resistor Screw Terminal Voltage AVDD V NonHART Current Limit 0 25 mA Programmable current limit, 14-bit resolution HART Mode Current Limit 23 30 mA Current input, loop powered with HART enabled, nonprogrammable |
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