Linduino  1.3.0
Linear Technology Arduino-Compatible Demonstration Board

LTC2302: 12-Bit, 1-Channel 500ksps SAR ADC with SPI Interface. More...

Detailed Description

LTC2302: 12-Bit, 1-Channel 500ksps SAR ADC with SPI Interface.

The LTC2302 is a single-channel 12-bit A/D converter with with serial I/O.
The part can be configured to operate on unipolar or bipolar modes. The
automatic sleep mode benefits power sensitive applications.

SPI DATA FORMAT (MSB First):

            Byte #1                           Byte #2
Data In  :   X  OS   X   X  UNI  X    X   X    X   X   X   X   X   X   X   X
Data Out :  D15 D14 D13 D12 D11 D10  D9  D8   D7  D6  D5  D4  D3  D2  D1  D0

OS   : ODD/Sign Bit
UNI  : Unipolar/Bipolar Bit
Dx   : Data Bits
X    : Don't care

http://www.linear.com/product/LTC2302

http://www.linear.com/product/LTC2302#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 LTC2302: 12-Bit, 1-Channel 500ksps SAR ADC with SPI Interface.

Definition in file LTC2302.h.

Go to the source code of this file.

Functions

void LTC2302_read (uint8_t cs, uint16_t adc_command, uint16_t *adc_code)
 Reads the ADC and returns 16-bit data. More...
 
float LTC2302_code_to_voltage (uint16_t adc_code, float vref, uint8_t uni_bipolar)
 Calculates the LTC2302 input voltage given the data, range, and unipolar/bipolar status. More...
 

Macros

#define LTC2302_CS   QUIKEVAL_CS
 Define the SPI CS pin. More...
 
LTC2302 Uni/Bipolar Config bits
#define LTC2302_UNIPOLAR   0xBFFF
 
#define LTC2302_BIPOLAR   0x0000
 

Function Documentation

◆ LTC2302_code_to_voltage()

float LTC2302_code_to_voltage ( uint16_t  adc_code,
float  vref,
uint8_t  uni_bipolar 
)

Calculates the LTC2302 input voltage given the data, range, and unipolar/bipolar status.

Returns
Floating point voltage
Parameters
adc_codeRaw ADC code
vrefReference voltage
uni_bipolarChoice of unipolar/bipolar

Definition at line 84 of file LTC2302.cpp.

◆ LTC2302_read()

void LTC2302_read ( uint8_t  cs,
uint16_t  adc_command,
uint16_t *  adc_code 
)

Reads the ADC and returns 16-bit data.

Returns
void
Parameters
csChip Select Pin
adc_commandChannel address, config bits ORed together
adc_codeReturns code read from ADC (from previous conversion)

Definition at line 77 of file LTC2302.cpp.

Macro Definition Documentation

◆ LTC2302_BIPOLAR

#define LTC2302_BIPOLAR   0x0000

Definition at line 80 of file LTC2302.h.

◆ LTC2302_CS

#define LTC2302_CS   QUIKEVAL_CS

Define the SPI CS pin.

Definition at line 72 of file LTC2302.h.

◆ LTC2302_UNIPOLAR

#define LTC2302_UNIPOLAR   0xBFFF

Definition at line 78 of file LTC2302.h.