Linduino  1.3.0
Linear Technology Arduino-Compatible Demonstration Board

LTC2373: 16/18-bit 1Msps 8 channel SAR ADC LTC2372: 16/18-bit 500ksps 8 channel SAR ADC LTC2374: 16 bit 1.6Msps 8 channel SAR ADC. More...

Detailed Description

LTC2373: 16/18-bit 1Msps 8 channel SAR ADC LTC2372: 16/18-bit 500ksps 8 channel SAR ADC LTC2374: 16 bit 1.6Msps 8 channel SAR ADC.

The LTC2373_16/18 are pin-compatible, 16/18-bit A/D converters
with serial I/O, and an internal reference.

Example Code:

Read ADC input.

    adc_command = LTC2373_CH0 | LTC2373_UNIPOLAR_MODE | LTC2373_LOW_GAIN_MODE | LTC2373_NORMAL_MODE;     // Single-ended, CH0, unipolar, low gain, normal mode.
    LTC2373_read(LTC2373_CS, adc_command, &adc_code);   // Throws out last reading
    LTC2373_read(LTC2373_CS, adc_command, &adc_code);   // Obtains the current reading and stores to adc_code variable

    // Convert adc_code to voltage
    adc_voltage = LTC2373_code_to_voltage(adc_code, LTC2373_lsb, LTC2373_offset_unipolar_code);

http://www.linear.com/product/LTC2373-16 http://www.linear.com/product/LTC2373_18 http://www.linear.com/product/LTC2372-16 http://www.linear.com/product/LTC2372-18 http://www.linear.com/product/LTC2374-16

http://www.linear.com/product/LTC2373-16#demoboards http://www.linear.com/product/LTC2373_18#demoboards http://www.linear.com/product/LTC2372-16#demoboards http://www.linear.com/product/LTC2372-18#demoboards http://www.linear.com/product/LTC2374-16#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 LTC2373: 16/18-bit 1Msps 8 channel SAR ADC

Definition in file LTC2373.h.

Go to the source code of this file.

Functions

uint8_t LTC2373_build_command (uint8_t sequencer_bit, uint8_t ch_designate, uint8_t range_select, uint8_t gain_compression)
 
void LTC2373_read (uint8_t cs, uint8_t adc_command, uint32_t *ptr_adc_code)
 Reads the LTC2373 and returns 32-bit data. More...
 
void LTC2373_configure (uint8_t cs, uint32_t adc_command)
 Configures the LTC2373. More...
 
float LTC2373_code_to_voltage (uint8_t adc_command, uint32_t adc_code, float vref)
 Calculates the LTC2373 input voltage given the binary data and lsb weight. More...
 

Macros

#define LTC2373_CS   QUIKEVAL_CS
 Define the SPI CS pin. More...
 
#define I2C_ADDRESS   0x20
 
#define I2C_COMMAND   0x80
 
#define LTC2373_SEQUENCER_BIT   0x80
 
LTC2373 Channel Addresses
#define LTC2373_CH0   0x40
 
#define LTC2373_CH1   0x48
 
#define LTC2373_CH2   0x50
 
#define LTC2373_CH3   0x58
 
#define LTC2373_CH4   0x60
 
#define LTC2373_CH5   0x68
 
#define LTC2373_CH6   0x70
 
#define LTC2373_CH7   0x78
 
#define LTC2373_CH0_1   0x00
 
#define LTC2373_CH1_0   0x20
 
#define LTC2373_CH2_3   0x08
 
#define LTC2373_CH3_2   0x28
 
#define LTC2373_CH4_5   0x10
 
#define LTC2373_CH5_4   0x30
 
#define LTC2373_CH6_7   0x18
 
#define LTC2373_CH7_6   0x38
 
LTC2373 Uni/GAIN config bits
#define LTC2373_RANGE_UNIPOLAR   0x00
 
#define LTC2373_RANGE_BIPOLAR   0x02
 
#define LTC2373_RANGE_DIFF_UNIPOLAR   0x04
 
#define LTC2373_RANGE_DIFF_BIPOLAR   0x06
 
#define LTC2373_NO_COMPRESSION   0x00
 
#define LTC2373_GAIN_COMPRESSION   0x01
 

Function Documentation

◆ LTC2373_build_command()

uint8_t LTC2373_build_command ( uint8_t  sequencer_bit,
uint8_t  ch_designate,
uint8_t  range_select,
uint8_t  gain_compression 
)

Definition at line 79 of file LTC2373.cpp.

◆ LTC2373_code_to_voltage()

float LTC2373_code_to_voltage ( uint8_t  adc_command,
uint32_t  adc_code,
float  vref 
)

Calculates the LTC2373 input voltage given the binary data and lsb weight.

Returns
Floating point voltage
Parameters
adc_codeRaw ADC code
vrefReference voltage

Definition at line 134 of file LTC2373.cpp.

◆ LTC2373_configure()

void LTC2373_configure ( uint8_t  cs,
uint32_t  adc_command 
)

Configures the LTC2373.

Returns
void

Definition at line 114 of file LTC2373.cpp.

◆ LTC2373_read()

void LTC2373_read ( uint8_t  cs,
uint8_t  adc_command,
uint32_t *  ptr_adc_code 
)

Reads the LTC2373 and returns 32-bit data.

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

Definition at line 89 of file LTC2373.cpp.

Macro Definition Documentation

◆ I2C_ADDRESS

#define I2C_ADDRESS   0x20

Definition at line 87 of file LTC2373.h.

◆ I2C_COMMAND

#define I2C_COMMAND   0x80

Definition at line 88 of file LTC2373.h.

◆ LTC2373_CH0

#define LTC2373_CH0   0x40

Definition at line 94 of file LTC2373.h.

◆ LTC2373_CH0_1

#define LTC2373_CH0_1   0x00

Definition at line 103 of file LTC2373.h.

◆ LTC2373_CH1

#define LTC2373_CH1   0x48

Definition at line 95 of file LTC2373.h.

◆ LTC2373_CH1_0

#define LTC2373_CH1_0   0x20

Definition at line 104 of file LTC2373.h.

◆ LTC2373_CH2

#define LTC2373_CH2   0x50

Definition at line 96 of file LTC2373.h.

◆ LTC2373_CH2_3

#define LTC2373_CH2_3   0x08

Definition at line 106 of file LTC2373.h.

◆ LTC2373_CH3

#define LTC2373_CH3   0x58

Definition at line 97 of file LTC2373.h.

◆ LTC2373_CH3_2

#define LTC2373_CH3_2   0x28

Definition at line 107 of file LTC2373.h.

◆ LTC2373_CH4

#define LTC2373_CH4   0x60

Definition at line 98 of file LTC2373.h.

◆ LTC2373_CH4_5

#define LTC2373_CH4_5   0x10

Definition at line 109 of file LTC2373.h.

◆ LTC2373_CH5

#define LTC2373_CH5   0x68

Definition at line 99 of file LTC2373.h.

◆ LTC2373_CH5_4

#define LTC2373_CH5_4   0x30

Definition at line 110 of file LTC2373.h.

◆ LTC2373_CH6

#define LTC2373_CH6   0x70

Definition at line 100 of file LTC2373.h.

◆ LTC2373_CH6_7

#define LTC2373_CH6_7   0x18

Definition at line 112 of file LTC2373.h.

◆ LTC2373_CH7

#define LTC2373_CH7   0x78

Definition at line 101 of file LTC2373.h.

◆ LTC2373_CH7_6

#define LTC2373_CH7_6   0x38

Definition at line 113 of file LTC2373.h.

◆ LTC2373_CS

#define LTC2373_CS   QUIKEVAL_CS

Define the SPI CS pin.

Definition at line 84 of file LTC2373.h.

◆ LTC2373_GAIN_COMPRESSION

#define LTC2373_GAIN_COMPRESSION   0x01

Definition at line 126 of file LTC2373.h.

◆ LTC2373_NO_COMPRESSION

#define LTC2373_NO_COMPRESSION   0x00

Definition at line 125 of file LTC2373.h.

◆ LTC2373_RANGE_BIPOLAR

#define LTC2373_RANGE_BIPOLAR   0x02

Definition at line 120 of file LTC2373.h.

◆ LTC2373_RANGE_DIFF_BIPOLAR

#define LTC2373_RANGE_DIFF_BIPOLAR   0x06

Definition at line 122 of file LTC2373.h.

◆ LTC2373_RANGE_DIFF_UNIPOLAR

#define LTC2373_RANGE_DIFF_UNIPOLAR   0x04

Definition at line 121 of file LTC2373.h.

◆ LTC2373_RANGE_UNIPOLAR

#define LTC2373_RANGE_UNIPOLAR   0x00

Definition at line 119 of file LTC2373.h.

◆ LTC2373_SEQUENCER_BIT

#define LTC2373_SEQUENCER_BIT   0x80

Definition at line 89 of file LTC2373.h.