Linduino  1.3.0
Linear Technology Arduino-Compatible Demonstration Board

Linear Technology DC571A Demonstration Board. More...

Detailed Description

Linear Technology DC571A Demonstration Board.

LTC2412: 2-Channel Differential Input 24-Bit No Latency Delta Sigma ADC

Linear Technology DC346A Demonstration Board. LTC2413: 24-Bit No Latency Delta Sigma ADC with Simultaneous 50Hz/60Hz Rejection ADC

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. No external power supply is required. Ensure all jumpers on
    the demo board are installed in their default positions from the
    factory.

  How to test Single-Ended mode:
    The voltage source should be connected to the ADC such that the negative
    lead is connected to ground. The positive lead may be connected to any
    channel input. Ensure voltage is within analog input voltage range -0.3V 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 to CH0 with respect to COM pin. Next, Measure this voltage with a
    precise voltmeter and enter this value. (This takes the reading.) Apply a higher
    voltage than the first voltage or approximately 2.40 volts to CH0. Anything
    above 2.40 is not reccomened. It is very likely to reach the ADC's full-scale
    and poduce invalide lsb and offset. Measure this voltage with a precise
    voltmeter and enter this value. Calibration is now stored in EEPROM. Upon
    startup 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/LTC2412 http://www.linear.com/product/LTC2413

http://www.linear.com/product/LTC2412#demoboards http://www.linear.com/product/LTC2413#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 DC746A.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 int8_t menu_1_read_single_ended ()
 Repeats Linduino loop. More...
 
static void menu_2_change_ref_voltage ()
 
static void setup ()
 Initialize Linduino. More...
 
static void loop ()
 Repeats Linduino loop. More...
 

Variables

static uint8_t demo_board_connected
 Set to 1 if the board is connected. More...
 
static float LTC2412_lsb = 2.98023241E-7
 Ideal LSB voltage for a perfect part. More...
 
static int32_t LTC2412_offset_code = 0
 Ideal offset for a perfect part. More...
 
static float reference_voltage = 5.0
 
const uint16_t MISO_TIMEOUT = 1000
 The MISO timeout (ms) More...
 

Function Documentation

◆ loop()

static void loop ( void  )
static

Repeats Linduino loop.

Definition at line 139 of file DC746A.ino.

◆ menu_1_read_single_ended()

static int8_t menu_1_read_single_ended ( )
static

Repeats Linduino loop.

Definition at line 170 of file DC746A.ino.

◆ menu_2_change_ref_voltage()

static void menu_2_change_ref_voltage ( )
static

Definition at line 207 of file DC746A.ino.

◆ print_prompt()

static void print_prompt ( )
static

Prints main menu.

Definition at line 237 of file DC746A.ino.

◆ print_title()

static void print_title ( void  )
static

Prints the title block when program first starts.

Definition at line 223 of file DC746A.ino.

◆ setup()

static void setup ( void  )
static

Initialize Linduino.

Definition at line 123 of file DC746A.ino.

Variable Documentation

◆ demo_board_connected

uint8_t demo_board_connected
static

Set to 1 if the board is connected.

Definition at line 113 of file DC746A.ino.

◆ LTC2412_lsb

float LTC2412_lsb = 2.98023241E-7
static

Ideal LSB voltage for a perfect part.

Definition at line 114 of file DC746A.ino.

◆ LTC2412_offset_code

int32_t LTC2412_offset_code = 0
static

Ideal offset for a perfect part.

Definition at line 115 of file DC746A.ino.

◆ MISO_TIMEOUT

const uint16_t MISO_TIMEOUT = 1000

The MISO timeout (ms)

Definition at line 120 of file DC746A.ino.

◆ reference_voltage

float reference_voltage = 5.0
static

Definition at line 116 of file DC746A.ino.