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[原创] ADI ADMW1001可配置精密测量平台解决方案

关键词:测试测量 传感器 ADMW1001

时间:2020-01-19 10:39:16       来源:中电网

ADI公司的ADMW1001是可配置精密测量平台,能直接连接到一系列未补偿和已补偿的模拟和数字传感器.ADMW1001具有激发,测量和校正传感器,并以传感器相关单位(例如degC, degF等)生成输出的所有构建模块,包括内置的测量智能功能,可控制系统配置,测量时序,时序监控以及数据编组.ADMW1001除了各种类性的RTD和热电偶,器件还能接口到4线桥如压力或应力变送器.查找表可写入到ADMW1001,对定制传感器进行完全修正的测量.器件有两个通用的连接到RTD,4线桥的测量通路,以及任一个定制电压输出传感器.器件工作电压3.3V,工作温度−40℃ 到+85℃,采用7 mm × 7 mm 48引脚LFCSP封装.主要用在资产健康状况监测,实验室仪器,智能农业,供应链健康跟踪和条件分析.本文介绍了ADMW1001主要特性,功能框图,典型连接框图以及评估板EV-ProMW1001ARDZ主要特性,概述图,电路图.

The ADMW1001 offers a flexible and versatile IC that directly connects to a range of sensors, which includes temperature and humidity sensors. The device has all of the building blocks to excite, measure, and correct the sensor and generate an output in sensor related units such as °C, °F, and psi. In conjunction with the MeasureWare® ecosystem, the ADMW1001 can be easily configured and optimized for the sensor types selected to meet the accuracy and measurement times required. The ADMW1001 is a highly flexible device with a feature set and sensor library that is designed to evolve over time. As additional functionality is developed, it becomes available, and it can be flashed to the device during printed circuit board (PCB) manufacturing or upgraded in the field through the custom flash loader tool set. The ADMW1001 can also be ordered prEPROgrammed with a specific revision of the firmware preloaded. Contact Analog Devices, Inc., for more information. The ADMW1001 is shipped with a firmware loader and requires flashing of the most recent version of ADMW1001 firmware to enable the growing list of measurement techniques and features available with MeasureWare. All firmware revisions for the ADMW1001 are available through the ADMW1001 product page and the MeasureWare Studio.

The ADMW1001 firmware revision 1.0 directly supports compensated J–, K–, and T–type thermocouples, and PT100 (platinum RTD, 100 Ω at 0℃) and PT1000 (platinum RTD, 1000 Ω at 0℃) 2-/3-wire resistance temperature detectors (RTD). Linearization for these sensors is automatically handled by the ADMW1001. The ADMW1001 also allows the user to connect custom sensors. In addition to various types of RTDs and thermocouples, the device can interface to 4-wire bridges, such as pressure or strain transducers. Lookup tables can be written to the ADMW1001, enabling fully corrected measurements for custom sensors. Each revision of the firmware has an associated user guide, which can be found on the ADMW1001 product page. The device has two universal measurement channels that connect to RTDs, 4-wire bridges, and any custom voltage output sensor. The device also has two thermocouple inputs. Thermocouple inputs are available on CH1_TC+/IEXC and CH2_TC+/IEXC with a shared COM_TC− pin. The TC_BIAS pin must be used to bias the thermocouples to midscale. When a channel is configured as a thermocouple or voltage input channel, it can also support compensation sensors per channel, in the form of 2-wire and 3-wire RTDs to be used as temperature compensation or cold junction compensation. The ADMW1001 includes two I2C measurement inputs and one serial peripheral interface (SPI) measurement input.These inputs are useful for compensated sensors such as pressure, humidity, and accelerometers. The ADMW1001 measures these sensors and generates an output in sensor related units.

The ADMW1001 features programmable measurement time, which enables customization of measurement, speed, and power consumption. Measurement intervals from seconds to milliseconds are supported. The ADMW1001 also supports simultaneous 50 Hz and 60 Hz antialiasing rejection, which is a key requirement in designs where rejection of interference from the main power supply is required. With the ADMW1001 per measurement configuration and on- chip measurement sequencer, the user can configure each measurement being used at one time and input the number of measurements required from each measurement channel, and the sequencer automatically steps through the cycle. Via a choice of interface modes, the measurement results can be accessed immediately when available. Alternatively, the on-chip first in, first out (FIFO) can hold the results, and all results can then be read at one time by the host processor. This functionality minimizes the workload on the host processor. Cycle time can be set to determine the interval at which the cycle is repeated. This is useful in systems such as environmental monitoring, where measurements are not needed continuously but at intervals of hours or days. The device enters a low power state during these intervals, which can extend the battery life. Multiple embedded diagnostics assist the user in designing a robust system. Diagnostics such as open wire detection, short- circuit detection, and checks on customer-entered lookup tables ensure that sensors are connected to the inputs and that the device is configured correctly. The device operates with a single power supply of 3.3 V. It is specified for a temperature range of −40℃ to +85℃, has a size of 7 mm × 7 mm, and is a 48-lead LFCSP.

ADMW1001主要特性:

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
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) channels
Embedded FIFO
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℃ to +85℃

ADMW1001应用:

Asset health monitoring
Laboratory instrumentation
Smart agriculture
Supply chain health tracking
Condition profiling

图1.ADMW1001功能框图

图2.ADMW1001典型连接框图

评估板EV-ProMW1001ARDZ

The EV-ProMW1001ARDZ development kit provides the flexibility and versatility to expand, refine, and enhance customer developed prototypes over time. The EV-ProMW1001ARDZ features the ADMW1001, a flexible hardware module that seamlessly connects to a range of both analog and digital compensated and uncompensated sensors. The EV-ProMW1001ARDZ features an Arduino-compatible header that allows the board to interface to a wide range of processor development boards. In conjunction with the MeasureWare® ecosystem, the ADMW1001 can be configured and optimized for sensor types selected to meet the accuracy and measurement times required.

Using the MeasureWare ecosystem and the MeasureWare Designer™ online tool, a new design can be defined using the tools of the ecosystem. These tools give an optimized recommended configuration for the associated hardware, in this case, the ADMW1001, which is in the form of a design pack. This design pack can then be used directly with the EV-ProMW1001ARDZ development kit to implement the defined measurement.

For further details on the ADMW1001, see the ADMW1001 data sheet. Use the ADMW1001 data sheet in conjunction with this user guide when using the EV-ProMW1001ARDZ.

评估板EV-ProMW1001ARDZ主要特性:

Full featured MeasureWare development kit
Control and analysis with MeasureWare Lab
Rapid configuration with MeasureWare Designer
Firmware development jumpstart enabled with API available in Mbed®
Multiplatform compatibility with Arduino R3 pin compatibility
Interfaces with MeasureWare sensor board library
DEVELOPMENT KIT CONTENTS
EV-ProMW1001ARDZ

图3.评估板EV-ProMW1001ARDZ外形图

图4.评估板EV-ProMW1001ARDZ概述图

图5.评估板EV-ProMW1001ARDZ电路图(1):配置和电源

图6.评估板EV-ProMW1001ARDZ电路图(2):模拟和数字连接器

图7.评估板EV-ProMW1001ARDZ电路图(3):电平转换器和Arduino插座

图8.评估板EV-ProMW1001ARDZ电路图(4):EEPROM转换器和EEPROM
详情请见:
https://www.analog.com/media/en/measureware/data-sheets/ADMW1001.pdf
https://www.analog.com/media/en/measureware/user-guides/EV-ProMW1001ARDZ-UG-1552.pdf
ADMW1001.pdf
EV-ProMW1001ARDZ-UG-1552.pdf

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