Linduino  1.3.0
Linear Technology Arduino-Compatible Demonstration Board

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.
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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.