Datasheet AD7194 (Analog Devices) - 10

Data Sheet AD7194 ABSOLUTE MAXIMUM RATINGS
TA = 25°C, unless otherwise noted.
THERMAL RESISTANCE Table 3.
θJA is specified for the worst-case conditions, that is, a device
Parameter Rating
soldered in a circuit board for surface-mount packages. AVDD to AGND −0.3 V to +6.5 V
Table 4. Thermal Resistance
DVDD to AGND −0.3 V to +6.5 V
Package Type θ
AGND to DGND −0.3 V to +0.3 V
JA θJC Unit
32-Lead LFCSP 32.5 32.71 °C/W Analog Input Voltage to AGND −0.3 V to AVDD + 0.3 V Reference Input Voltage to AGND −0.3 V to AVDD + 0.3 V
ESD CAUTION
Digital Input Voltage to DGND −0.3 V to DVDD + 0.3 V Digital Output Voltage to DGND −0.3 V to DVDD + 0.3 V AINx/Digital Input Current 10 mA Operating Temperature Range −40°C to +105°C Storage Temperature Range −65°C to +150°C Maximum Junction Temperature 150°C Lead Temperature, Soldering Reflow 260°C Stresses at or above those listed under Absolute Maximum Ratings may cause permanent damage to the product. This is a stress rating only; functional operation of the product at these or any other conditions above those indicated in the operational section of this specification is not implied. Operation beyond the maximum operating conditions for extended periods may affect product reliability. Rev. B | Page 9 of 54 Document Outline FEATURES APPLICATIONS GENERAL DESCRIPTION FUNCTIONAL BLOCK DIAGRAM TABLE OF CONTENTS REVISION HISTORY SPECIFICATIONS TIMING CHARACTERISTICS Circuit and Timing Diagrams ABSOLUTE MAXIMUM RATINGS THERMAL RESISTANCE ESD CAUTION PIN CONFIGURATION AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS RMS NOISE AND RESOLUTION SINC4 CHOP DISABLED SINC3 CHOP DISABLED FAST SETTLING ON-CHIP REGISTERS COMMUNICATIONS REGISTER RS2, RS1, RS0 = 000 STATUS REGISTER RS2, RS1, RS0 = 000; Power-On/Reset = 0x80 MODE REGISTER RS2, RS1, RS0 = 001; Power-On/Reset = 0x080060 CONFIGURATION REGISTER RS2, RS1, RS0 = 010; Power-On/Reset = 0x000117 Channel Selection (Pseudo Bit = 0) DATA REGISTER RS2, RS1, RS0 = 011; Power-On/Reset = 0x000000 ID REGISTER RS2, RS1, RS0 = 100; Power-On/Reset = 0xX3 GPOCON REGISTER RS2, RS1, RS0 = 101; Power-On/Reset = 0x00 OFFSET REGISTER RS2, RS1, RS0 = 110; Power-On/Reset = 0x800000) FULL-SCALE REGISTER RS2, RS1, RS0 = 111; Power-On/Reset = 0x5XXXX0 ADC CIRCUIT INFORMATION OVERVIEW Analog Inputs Multiplexer PGA Reference Detect Burnout Currents Σ-Δ ADC and Filter Serial Interface Clock Temperature Sensor Digital Outputs Calibration ANALOG INPUT CHANNEL PROGRAMMABLE GAIN ARRAY (PGA) REFERENCE REFERENCE DETECT BIPOLAR/UNIPOLAR CONFIGURATION DATA OUTPUT CODING BURNOUT CURRENTS DIGITAL INTERFACE Single Conversion Mode Continuous Conversion Mode Continuous Read RESET SYSTEM SYNCHRONIZATION ENABLE PARITY CLOCK TEMPERATURE SENSOR LOGIC OUTPUTS CALIBRATION DIGITAL FILTER SINC4 FILTER (CHOP DISABLED) Sinc4 Output Data Rate/Settling Time Sinc4 Zero Latency Sinc4 50 Hz/60 Hz Rejection SINC3 FILTER (CHOP DISABLED) Sinc3 Output Data Rate and Settling Time Sinc3 Zero Latency Sinc3 50 Hz/60 Hz Rejection CHOP ENABLED (SINC4 FILTER) Output Data Rate and Settling Time (Sinc4 Chop Enabled) 50 Hz/60 Hz Rejection (Sinc4 Chop Enabled) CHOP ENABLED (SINC3 FILTER) Output Data Rate and Settling Time (Sinc3 Chop Enabled) 50 Hz/60 Hz Rejection (Sinc3 Chop Enabled) FAST SETTLING MODE (SINC4 FILTER) Output Data Rate and Settling Time, Sinc4 Filter 50 Hz/60 Hz Rejection, Sinc4 Filter FAST SETTLING MODE (SINC3 FILTER) Output Data Rate and Settling Time, Sinc3 Filter 50 Hz/60 Hz Rejection, Sinc3 Filter FAST SETTLING MODE (CHOP ENABLED) SUMMARY OF FILTER OPTIONS GROUNDING AND LAYOUT APPLICATIONS INFORMATION FLOWMETER OUTLINE DIMENSIONS ORDERING GUIDE