Evaluating the LTC2983 / ADT7604

See projects/ltc2983 (doxygen) for the Doxygen documentation.

The DC2296/DC2420/DC2531 is the starter kit for demonstrating the performance and ease of use of the LTC2983/LTC2984/LTC2986, which is a complete temperature measurement system on a chip. This kit includes the DC2209/DC2399/DC2508 (main demo circuit containing the LTC2983/LTC2984/LTC2986) and the DC2210 (a simple experiment circuit allowing bread boarding). In addition to the starter demonstration kit, sensor specific demonstration boards highlighting the performance of RTDs, thermistors, or thermocouples are also available.

The DC2209/DC2399/DC2508 is a member of the QuikEval family of demonstration boards. It is designed to allow easy evaluation of the LTC2983/LTC2984/LTC2986 and may be connected to any one of the sensor daughter boards.

These daughter boards allow evaluation of the various LTC2983/LTC2984/LTC2986 sensor types:

Universal Temperature Measurement Board - DC2211
Thermocouple Board - DC2212
Dedicated RTD Board - DC2213
Dedicated Thermistor Board - DC2214

Hardware Specifications

Power Supply Requirements

For this specific project, the DC2209/DC2399/DC2508 evaluation board is powered by the 3V3 supply from MAX32666FTHR.

Pin Description

Please see the following table for the pin assignments:

Name

Description

VDD

Connect to 3V3 supply

GND

Connect to Ground

SCK

Connect to SPI Clock (SCK)

SDO

Connect to SPI Master In Slave Out (MISO)

CS

Connect to SPI Chip Select (CS)

SDI

Connect to SPI Master Out Slave In (MOSI)

RESET

Connect to GPIO pin (RESET)

No-OS Build Setup

Please see: https://wiki.analog.com/resources/no-os/build

No-OS Supported Examples

The initialization data used in the examples is taken out from: Project Common Data Path

The macros used in Common Data are defined in platform specific files found in: Project Platform Configuration Path

Basic example

This is a simple example that initializes the LTC2983, perform the start-up sequence and configure the output voltage.

In order to build the basic example make sure you have the following configuration in the Makefile

# Select the example you want to enable by choosing y for enabling and n for disabling
BASIC_EXAMPLE = y
IIO_EXAMPLE = n

IIO example

This project is actually an IIOD demo for DC2209/DC2399/DC2508 evaluation board. The project launches a IIOD server on the board so that the user may connect to it via an IIO client.

Using IIO-Oscilloscope, the user can configure the device.

If you are not familiar with ADI IIO Application, please take a look at: IIO No-OS

If you are not familiar with ADI IIO-Oscilloscope Client, please take a look at: IIO Oscilloscope

The No-OS IIO Application together with the No-OS IIO LTC2983 driver take care of all the back-end logic needed to setup the IIO server.

This example initializes the IIO device and calls the IIO app as shown in: IIO Example

In order to build the IIO project make sure you have the following configuration in the Makefile

# Select the example you want to enable by choosing y for enabling and n for disabling
BASIC_EXAMPLE = n
IIO__EXAMPLE = y

No-OS Supported Platforms

Maxim Platform

Used hardware

Connections:

DC2209/DC2399/DC2508 Pin	Function	MAX32666FTHR Pin
VDD	VDD	3V3
SCK	SPI Clock (SCK)	AIN3 (SPI1_SCK)
SDO	SPI Master In Slave Out (MISO)	AIN2 (SPI1_MISO)
CS	SPI Chip Select (CS)	AIN0 (SPI1_SS0)
SDI	SPI Master Out Slave In (MOSI)	AIN1 (SPI1_MOSI)
RESET	GPIO (RESET Pin)	AIN4 (P0_27)
GND	Ground (GND)	GND

Build Command

# to delete current build
make PLATFORM=maxim TARGET=max32665 reset
# to build the project and flash the code
make PLATFORM=maxim TARGET=max32665 run

EVAL-ADT7604-AZ

Overview

The EVAL-ADT7604-AZ is the evaluation board for the ADT7604, a 20-channel temperature measurement and liquid leak detection IC based on the LTC2983 architecture. The board configures three copper trace resistance channels, two liquid leak detector channels with a resistance-to-coverage lookup table, and one PT100 RTD temperature channel.

Hardware Specifications

Power Supply Requirements

The EVAL-ADT7604-AZ is powered by the 3V3 supply from the MAX78000FTHR.

Pin Description

Name

Description

VDD

Connect to 3V3 supply

GND

Connect to Ground

SCK

Connect to SPI Clock (SCK)

SDO

Connect to SPI Master In Slave Out (MISO)

CS

Connect to SPI Chip Select (CS)

SDI

Connect to SPI Master Out Slave In (MOSI)

RESET

Connect to GPIO pin (RESET)

Channel Configuration

CH

Sensor

Sense Resistor

CH2

100Ω rsense (R4)

— (rsense)

CH4

Copper trace (sub-ohm)

CH2

CH6

Copper trace (sub-ohm)

CH2

CH8

Copper trace (sub-ohm)

CH2

CH12

1kΩ rsense (R6)

— (rsense)

CH14

Leak detector (custom table)

CH12

CH16

Leak detector (custom table)

CH12

CH18

PT100 2-wire RTD

CH12

No-OS Supported Examples

ADT7604 Basic example

This example initializes the ADT7604, reads copper trace resistance, leak detector coverage, and PT100 temperature, and prints results over UART.

In order to build the ADT7604 basic example make sure you have the following configuration in the Makefile

# Select the example you want to enable by choosing y for enabling and n for disabling
BASIC_EXAMPLE = n
IIO_EXAMPLE = n
ADT7604_BASIC_EXAMPLE = y
ADT7604_IIO_EXAMPLE = n

ADT7604 IIO example

This project is an IIOD demo for the EVAL-ADT7604-AZ board. The project launches a IIOD server on the board so that the user may connect to it via an IIO client. Copper trace channels are exposed as IIO_RESISTANCE channels, leak detector channels as IIO_RESISTANCE (raw) and IIO_TEMP (coverage in milli-percent), and the PT100 as an IIO_TEMP channel.