| Linduino 1.3.0 Linear Technology Arduino-Compatible Demonstration Board

Functions | Variables
DC1490.ino File Reference
Analog-to-Digital Converters (ADC) » LTC2460: 24-Bit, 16-Channel Delta Sigma ADCs with Selectable Speed/Resolution

Linear Technology DC1490A-A Demonstration Board. More...

## Detailed Description

Linear Technology DC1490A-A Demonstration Board.

LTC2460: 24-Bit, 16-Channel Delta Sigma ADC with SPI interface

    NOTES
      Setup:
       Set the terminal baud rate to 115200 and select the newline terminator. Equipment
       required is a precision voltage source and a precision voltmeter. Additionally,
       an external power supply is required to provide a negative voltage for Amp V-.
       Set it to anywhere from -1V to -5V. Set Amp V+ to Vcc. Ensure the COM and REF-
       pins are connected to ground. The REF+ pin should be connected to +5V.

      How to test Single-Ended mode:
       The voltage source should be connected to the ADC such that the negative lead is
       connected to the COM(common) pin. The positive lead may be connected to any
       channel input. Ensure voltage is within analog input voltage range -0.3 to 2.5V.

      How to test Differential Mode:
       The voltage source should be connected with positive and negative leads to paired
       channels. The voltage source negative output must also be connected to the COM
       pin in order to provide a ground-referenced voltage. Ensure voltage is within
       analog input voltage range -0.3V to +2.5V. Swapping input voltages results in a
       reversed polarity reading.

      How to calibrate:
       Apply 100mV CH0 with respect to COM. Next, measure this voltage with a precise
       voltmeter and enter this value. (This takes the reading.) Now apply approximately
       2.40 volts to CH0. Measure this voltage with a precise voltmeter and enter this
       value. Calibration is now stored in EEPROM. Upon start-up the calibration values
       will be restored.

    USER INPUT DATA FORMAT:
     decimal : 1024
     hex     : 0x400
     octal   : 02000  (leading 0 "zero")
     binary  : B10000000000
     float   : 1024.0

http://www.linear.com/product/LTC2460

http://www.linear.com/product/LTC2460#demoboards

Copyright 2018(c) Analog Devices, Inc.

All rights reserved.

Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:

- Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
- Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.
- Neither the name of Analog Devices, Inc. nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission.
- The use of this software may or may not infringe the patent rights of one or more patent holders. This license does not release you from the requirement that you obtain separate licenses from these patent holders to use this software.
- Use of the software either in source or binary form, must be run on or directly connected to an Analog Devices Inc. component.

THIS SOFTWARE IS PROVIDED BY ANALOG DEVICES "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, NON-INFRINGEMENT, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL ANALOG DEVICES BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, INTELLECTUAL PROPERTY RIGHTS, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

Definition in file DC1490.ino.

Go to the source code of this file.

## Functions
static void | print_title ()
| Prints the title block when program first starts. More...
static void | print_prompt ()
| Prints main menu. More...
static void | menu_1_read_single_ended ()
| Read channels in single-ended mode. More...
static void | menu_2_set_1X2X ()
| Set 1X or 2X mode. More...
static void | setup ()
| Initialize Linduino. More...
static void | loop ()
| Repeats Linduino loop. More...
static void | menu_3_sleep ()

## Variables
static uint8_t | demo_board_connected
| Set to 1 if the board is connected. More...
static int16_t | two_x_mode = LTC2460_SPEED_1X
| The LTC2460 2X Mode settings. More...
static float | LTC2460_vref = 1.25
static uint16_t | eoc_timeout = 25
const uint16_t | BUILD_1X_2X_COMMAND [2] = {LTC2460_SPEED_1X, LTC2460_SPEED_2X}
| Lookup table to build 1X / 2X bits. More...

## Function Documentation

## ◆ loop()

static void loop | ( | void |  | ) |
| static

Repeats Linduino loop.

Definition at line 141 of file DC1490.ino.

## ◆ menu_1_read_single_ended()

static void menu_1_read_single_ended | ( |  | ) |
| static

Read channels in single-ended mode.

Definition at line 199 of file DC1490.ino.

## ◆ menu_2_set_1X2X()

static void menu_2_set_1X2X | ( |  | ) |
| static

Set 1X or 2X mode.

Definition at line 251 of file DC1490.ino.

## ◆ menu_3_sleep()

static void menu_3_sleep | ( |  | ) |
| static

Definition at line 275 of file DC1490.ino.

## ◆ print_prompt()

static void print_prompt | ( |  | ) |
| static

Prints main menu.

Definition at line 190 of file DC1490.ino.

## ◆ print_title()

static void print_title | ( | void |  | ) |
| static

Prints the title block when program first starts.

Definition at line 175 of file DC1490.ino.

## ◆ setup()

static void setup | ( | void |  | ) |
| static

Initialize Linduino.

Definition at line 117 of file DC1490.ino.

## Variable Documentation

## ◆ BUILD_1X_2X_COMMAND

const uint16_t BUILD_1X_2X_COMMAND[2] = {LTC2460_SPEED_1X, LTC2460_SPEED_2X}

Lookup table to build 1X / 2X bits.

Build the command for 1x or 2x mode

Definition at line 113 of file DC1490.ino.

## ◆ demo_board_connected

uint8_t demo_board_connected
| static

Set to 1 if the board is connected.

Definition at line 106 of file DC1490.ino.

## ◆ eoc_timeout

uint16_t eoc_timeout = 25
| static

Definition at line 109 of file DC1490.ino.

## ◆ LTC2460_vref

float LTC2460_vref = 1.25
| static

Definition at line 108 of file DC1490.ino.

## ◆ two_x_mode

int16_t two_x_mode = LTC2460_SPEED_1X
| static

The LTC2460 2X Mode settings.

Definition at line 107 of file DC1490.ino.