Document
Data Sheet
Flexible Condition Monitoring Platform ADMW1001
FEATURES
Embedded FIFO
Enabled by the MeasureWare ecosystem Rapid configuration Upgradeable firmware enabling new features Complete measurement node (sensor excitation, sensor
measurement, and sensor compensation) Directly digitizes compensated and uncompensated sensors Sensors include:
RTD Thermocouple
Multiple diagnostics Per measurement configuration (sensor type, settling time,
gain, excitation currents, linearization, speed) Configurable cycle sampling time Embedded sequencer Simultaneous 50 Hz and 60 Hz antialiasing rejection SPI communications interface Power supply voltage: 3.3 V Operating temperature range: −40°C to +85°C
Wheatstone bridge Embedded linearization for 2-/3-wire PT100/1000 RTDs J, K, T, and custom type thermocouples Supports custom lookup tables Supports selected I2C/SPI sensors 2 thermocouple channels 2 universal (4-/6-wire bridge, RTD, ratiometric referencing)
APPLICATIONS
Asset health monitoring Laboratory instrumentation Smart agriculture Supply chain health tracking Condition profiling
channels
FUNCTIONAL BLOCK DIAGRAM
AVDD
IOVDD
RSENSE_BIAS RSENSE– RSENSE+
CH1_AIN– CH1_AIN+ CH1_IEXC CH1_TC+/IEXC
TC_BIAS COM_TC–
CH2_TC+/IEXC CH2_IEXC CH2_AIN+ CH2_AIN–
VREF+ VREF–
INTERNAL REFERENCE
DIGITAL FILTER
MUX
PGA PGA
24-BIT Σ-Δ ADC
24-BIT Σ-Δ ADC
CURRENT SOURCES
MEASUREMENT TIME
50Hz/60Hz REJECTION CHANNEL SEQUENCER
DIAGNOSTICS
CALIBRATION
CORRECTION/ TRANSLATION
LOOKUP TABLE/ POLYNOMIAL
FIFO
INTERFACE LOGIC
RESET WAKE_UP STATUS
CS0 MISO0 MOSI0 SCLK0 DRDY
CS1 MISO1 MOSI1 SCLK1
ADMW1001
17325-001
GND_SW AGND
DVDD_REG AVDD_REG INT_REF
Figure 1.
SCL SDA GPIO0 GPIO1 GPIO2
Rev. 0
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ADMW1001
TABLE OF CONTENTS
Features .............................................................................................. 1 Applications....................................................................................... 1 Functional Block Diagram .............................................................. 1 Revision History ............................................................................... 2 General Description ......................................................................... 3 Specifications..................................................................................... 4
Timing Characteristics ................................................................ 7 Sensor Interface Timing Specifications ..................................... 8 Absolute Maximum Ratings.......................................................... 10 Thermal Resistance .................................................................... 10 ESD Caution................................................................................ 10 Pin Configuration and Function Descriptions........................... 11 Typical Performance Characteristics ........................................... 13 Theory of Operation ...................................................................... 14 Applications Information .............................................................. 15
REVISION HISTORY
7/2019—Revision 0: Initial Version
Data Sheet
ADC ............................................................................................. 15 Powering the ADMW1001 ....................................................... 15 Interface Logic ............................................................................ 15 Channel Sequencer .................................................................... 15 Digital Filter ................................................................................ 15 Reference ..................................................................................... 15 Calibration and LUT.................................................................. 15 PGA and Buffer .......................................................................... 15 Excitation Current Source......................................................... 15 Correction and Translation....................................................... 16 Multiplexer .................................................................................. 16 Outline Dimensions ...........................................