Linduino  1.3.0
Linear Technology Arduino-Compatible Demonstration Board

LTC2482: 16-Bit Delta-Sigma ADC with Easy Drive Input Current Cancellation. More...

Detailed Description

LTC2482: 16-Bit Delta-Sigma ADC with Easy Drive Input Current Cancellation.

The LTC2480 is a 16-Bit Delta-Sigma ADC with Easy Drive Input Current Cancellation.
The LTC2482 allows a wide common mode input range (0V to VCC) independent of the
reference voltage. The reference can be as low as 100mV or can be tied directly to
VCC. The noise level is 600nV RMS independent of VREF . This allows direct
digitization of low level signals with 16-bit accuracy. The LTC2482 includes an on-chip
trimmed oscillator, eliminating the need for external crystals or oscillators and
provides 87dB rejection of 50Hz and 60Hz line frequency noise. Absolute accuracy and low
drift are automatically maintained through continuous, transparent, offset and
full-scale calibration.

Example Code:

Read ADC input.

    LTC2482_read(LTC2482_CS, &adc_code);   // Throws out last reading
    LTC2482_read(LTC2482_CS, &adc_code);   // Obtains the current reading and stores to adc_code variable

  display_code = adc_code >> 4;
    display_code = display_code & 0xFFFF;

    // Convert adc_code to voltage
    adc_voltage = LTC2482_code_to_voltage(display_code, vref);

http://www.linear.com/product/LTC2482

http://www.linear.com/product/LTC2482#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.

Header for LTC2482: 16-Bit Delta-Sigma ADC with Easy Drive Input Current Cancellation.

Definition in file LTC2482.h.

Go to the source code of this file.

Functions

void LTC2482_read (uint8_t cs, uint32_t *ptr_adc_code)
 Reads the LTC2482 and returns 24-bit data. More...
 
float LTC2482_code_to_voltage (uint32_t adc_code, float vref)
 Calculates the LTC2482 input voltage given the binary data, reference voltage and input gain. More...
 

Macros

#define LTC2482_CS   QUIKEVAL_CS
 Define the SPI CS pin. More...
 

Function Documentation

◆ LTC2482_code_to_voltage()

float LTC2482_code_to_voltage ( uint32_t  adc_code,
float  vref 
)

Calculates the LTC2482 input voltage given the binary data, reference voltage and input gain.

Returns
Floating point voltage
Parameters
adc_codeRaw ADC code
vrefReference voltage

Definition at line 84 of file LTC2482.cpp.

◆ LTC2482_read()

void LTC2482_read ( uint8_t  cs,
uint32_t *  ptr_adc_code 
)

Reads the LTC2482 and returns 24-bit data.

Returns
void
Parameters
csChip Select Pin
ptr_adc_codeReturns code read from ADC (from previous conversion)

Definition at line 72 of file LTC2482.cpp.

Macro Definition Documentation

◆ LTC2482_CS

#define LTC2482_CS   QUIKEVAL_CS

Define the SPI CS pin.

Definition at line 80 of file LTC2482.h.