Datasheet AD4110-1 (Analog Devices) - 5

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Data Sheet AD4110-1 Parameter Min Typ Max Unit Test Conditions/Comments
CURRENT INPUT MODE USING Gain = 4 INTERNAL SENSE RESISTOR9 Input Current Range10 −20 +20 mA Specified performance range −24 +24 mA Functional range Transimpedance Gain 96 mV/mA Gain = 4, sense resistor (RSENSE) = 24 Ω Gain Error Before Calibration3 ±30 % Using Calibration Coefficient4 −0.1 +0.1 % TA = 25°C, IIN = 20 mA Gain Drift vs. Temperature2 −50 +50 ppm/°C Excludes reference drift, includes RSENSE resistor drift Gain Drift vs. Time5 250 ppm Over 1000 hours Input Offset Error −5 +5 µA Input Offset Drift vs. Temperature2 50 nA/°C Input Offset Drift vs. Time5 ±200 nA Over 1000 hours Integral Nonlinearity 25 75 ppm/FSR FSR = 2 × FS Input Overcurrent Detection ±35 mA Input Current Internal Limit10 ±40 mA Overcurrent self-protection Input Impedance2, 11 30 45 60 Ω Input current <±24 mA Input Current Noise and Resolution See Table 16 to Table 21 Input Common-Mode Rejection, DC 0.15 µA/V Power Supply Rejection, DC8 0.01 µA/V Related to VDD and VSS CURRENT INPUT MODE USING External sense resistor (REXT) = 200 Ω, EXTERNAL SENSE RESISTOR12, 13 gain = 0.5 Input Current Range7 −20 +20 mA Specified performance range −24 +24 mA Functional range Input Overcurrent Detection ±35 mA Input Current Internal Limit7 ±40 mA Overcurrent self-protection Gain Drift vs. Temperature2 2.5 ppm/°C Excludes reference drift and drift of external sense resistor ADC SPEED AND PERFORMANCE Output Data Rate2 5 125,000 SPS No Missing Codes2 24 Bits Sinc5 + sinc1 filter setting Resolution See Table 16 to Table 21 NO POWER SUPPLY MODE Input Voltage Drop 5 V Current mode, input current = 24 mA Input Current Internal Limit2 ±55 ±70 mA Current mode, overcurrent self- protection Input Current Loss 70 µA Current mode, 24 mA, GND connected Input Current in Voltage Mode ±0.5 mA Voltage mode FIELD POWER SUPPLY MODE Output Voltage, AIN(+) Pin2 VDD − 2.5 VDD − 1.5 V Output current = 24 mA VDD − 0.1 VDD V No load Output Current, AIN(+) Pin −24 mA Output Current Limit, AIN(+) Pin2 −35 −45 −55 mA Overcurrent self-protection Voltage, AIN(−) Pin2 VSS + 3.6 VSS + 4.2 V AIN(−) with 24 mA, no VSS diode VSS + 2.2 VSS + 2.7 V No load, no VSS diode Input Current Limit, AIN(−) Pin +40 mA Rev. 0 | Page 5 of 74 Document Outline FEATURES APPLICATIONS GENERAL DESCRIPTION FUNCTIONAL BLOCK DIAGRAM TABLE OF CONTENTS REVISION HISTORY SPECIFICATIONS TIMING SPECIFICATIONS Timing Diagrams ABSOLUTE MAXIMUM RATINGS THERMAL RESISTANCE ESD CAUTION PIN CONFIGURATION AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS THEORY OF OPERATION POWER SUPPLY SEQUENCE PROTECTION DIODE ANALOG INPUT PULL-UP/PULL-DOWN CURRENTS ANTIALIASING FILTER RTD EXCITATION CURRENTS FIELD POWER SUPPLY MODE NO POWER SUPPLY MODE BIAS VOLTAGE GENERATOR PGA CALIBRATION REGISTERS SERIAL INTERFACE CLOCK ADC ADC FILTER REGISTERS ADC GAIN AND OFFSET REGISTERS NOISE PERFORMANCE AND RESOLUTION MODES OF OPERATION DEFAULT MODE OF OPERATION ON POWER-UP CHANGING THE DEFAULT MODE OF OPERATION FOR FUTURE POWER-UP CYCLES POWER SUPPLY REQUIREMENTS SYSTEM CLOCK REQUIREMENTS BIPOLAR AND UNIPOLAR OUTPUT AUXILIARY LOW VOLTAGE INPUTS DIGITAL FILTER CONTINUOUS CONVERSION MODE INPUT AUTO SEQUENCING SINGLE CONVERSION MODE ADC CONVERSION DELAY BIAS VOLTAGE GENERATOR ANTIALIASING FILTER CIRCUIT CURRENT MODE Transimpedance Gain Using an External Sense Resistor VOLTAGE AND THERMOCOUPLE MODE Input Scaling for Voltage Mode Thermocouple Inputs RTD MODE Generating RTD Currents with an External Resistor Excitation Currents RTD Initial Drift 4-Wire RTD 3-Wire RTD 2-Wire RTD Alternative 3-Wire Configuration FIELD POWER SUPPLY MODE Overvoltage Protection NO POWER SUPPLY MODE Voltage Mode Current Mode System Redundancy GAIN CALIBRATION DATA REGISTER GAIN CALIBRATION IN VOLTAGE MODE GAIN CALIBRATION IN CURRENT MODE SCALING FACTOR AUTOCALIBRATION MODES APPLICATION EXAMPLES Example 1 Example 2 DIAGNOSTICS AND PROTECTION DIAGNOSTIC FLAGS ERROR PIN OVERTEMPERATURE DETECTION AND THERMAL SHUTDOWN OVERVOLTAGE AND UNDERVOLTAGE DETECTION OVERVOLTAGE PROTECTION DIAGNOSING OVERVOLTAGE AND UNDERVOLTAGE CONDITIONS OPEN WIRE DETECTION DIAGNOSTICS FOR RTD MEASUREMENTS AND RTD FLAGS NOISE, SETTLING TIME, AND DIGITAL FILTERING DIGITAL FILTER SINC5 + SINC1 FILTER SINC3 FILTER ENHANCED 50 HZ AND 60 HZ REJECTION FILTERS RTD MODE NOISE PERFORMANCE SERIAL PERIPHERAL INTERFACE RESETTING THE AD4110-1 SPI COMMAND TO COMMUNICATIONS REGISTER DOUT/ PIN WRITE OPERATION READ OPERATION MULTIPLE DEVICES ON THE SPI BUS CRC CHECKSUM CRC CHECKSUM METHODS Polynomial Calculation Polynomial CRC Calculation of a 24-Bit Word: 0x654321 (Eight Command Bits and 16-Bit Data) XOR Calculation REGISTER DETAILS AFE REGISTER MAP AFE REGISTER DESCRIPTIONS AFE_TOP_STATUS Register AFE_CNTRL1 Register AFE_CLK_CTRL Register AFE_CNTRL2 Register PGA_RTD_CTRL Register AFE_ERR_DISABLE Register AFE_DETAIL_STATUS Register AFE_CAL_DATA Register AFE_RSENSE_DATA Register NO_PWR_DEFAULT_SEL Register NO_PWR_DEFAULT_STATUS Register ADC REGISTER MAP ADC REGISTER DESCRIPTIONS ADC_STATUS Register ADC_MODE Register ADC_INTERFACE Register ADC_CONFIG Register Data Register Filter Register ADC_GPIO_CONFIG Register ID Register ADC_OFFSET0 Register ADC_OFFSET1 Register ADC_OFFSET2 Register ADC_OFFSET3 Register ADC_GAIN0 Register ADC_GAIN1 Register ADC_GAIN2 Register ADC_GAIN3 Register OUTLINE DIMENSIONS ORDERING GUIDE