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Linduino
1.3.0
Linear Technology Arduino-Compatible Demonstration Board
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LTC2473: 16-Bit, Delta Sigma ADC with I2C interface. More...
LTC2473: 16-Bit, Delta Sigma ADC with I2C interface.
The LTC2471/LTC2473 are small, 16-bit analog-to-digital converters with an integrated precision reference and a selectable 208sps or 833sps output rate. They use a single 2.7V to 5.5V supply and communicate through an I2C Interface. The LTC2471 is single-ended with a 0V to VREF input range and the LTC2473 is differential with a +-VREF input range. Both ADC's include a 1.25V integrated reference with 2ppm/C drift performance and 0.1% initial accuracy. They include an integrated oscillator and perform conversions with no latency for multiplexed applications. The LTC2471/LTC2473 include a proprietary input sampling scheme that reduces the average input current several orders of magnitude when compared to conventional delta sigma converters. I2C DATA FORMAT (MSB FIRST); Data Out: Byte #1 Byte #2 MSB START SA6 SA5 SA4 SA3 SA2 SA1 SA0 W SACK REPEAT START D15 D14 D13 D12 D11 D10 D9 D8 MACK Byte #3 LSB D7 D6 D5 D4 D3 D2 D1 D0 MNACK STOP Data In: Byte #1 Byte #2 START SA6 SA5 SA4 SA3 SA2 SA1 SA0 W SACK C3 C2 C1 C0 X X X X SACK STOP START : I2C Start REPEAT Start : I2C Repeat Start STOP : I2C Stop SACK : I2C Slave Generated Acknowledge (Active Low) MACK : I2C Master Generated Acknowledge (Active Low) MNACK : I2C Master Generated Not Acknowledge SAx : I2C Address W : I2C Write (0) R : I2C Read (1) Cx : Command Code Dx : Data Bits X : Don't care Example Code: Read LTC2473: uint8_t acknowledge; int32_t adc_code = 0; uint16_t timeout = 300; // timeout in microseconds float adc_voltage; acknowledge = LTC2473_read(i2c_address, &adc_code, timeout); // Convert adc_code to voltage adc_voltage = LTC2473_code_to_voltage(adc_code, LTC2473_lsb, LTC2473_offset_code);
http://www.linear.com/product/LTC2473
http://www.linear.com/product/LTC2473#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:
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 LTC2473: 16-Bit, Delta Sigma ADC with I2C interface
Definition in file LTC2473.h.
Go to the source code of this file.
Functions | |
uint8_t | LTC2473_read (uint8_t i2c_address, int32_t *adc_code, uint16_t timeout) |
Reads from LTC2473. More... | |
uint8_t | LTC2473_write (uint8_t i2c_address, uint8_t adc_command) |
Writes to the LTC2473. More... | |
float | LTC2473_code_to_voltage (int32_t adc_code, float vref) |
Calculates the voltage corresponding to an ADC code, given the reference (in volts) More... | |
Macros | |
I2C_Addresses | |
#define | LTC2473_I2C_ADDRESS 0x14 |
I2C address of the LTC2473. More... | |
Mode Configuration | |
#define | LTC2473_ENABLE_PROGRAMMING 0x80 |
#define | LTC2473_SPS_208 0x00 |
#define | LTC2473_SPS_833 0x20 |
#define | LTC2473_SLEEP 0x10 |
float LTC2473_code_to_voltage | ( | int32_t | adc_code, |
float | vref | ||
) |
Calculates the voltage corresponding to an ADC code, given the reference (in volts)
adc_code | Code read from adc |
vref | VRef (in volts) |
Definition at line 94 of file LTC2473.cpp.
uint8_t LTC2473_read | ( | uint8_t | i2c_address, |
int32_t * | adc_code, | ||
uint16_t | timeout | ||
) |
Reads from LTC2473.
i2c_address | I2C address (7-bit format) for part |
adc_code | 2 byte conversion code read from LTC2473 |
timeout | The timeout in (microseconds) |
Definition at line 77 of file LTC2473.cpp.
uint8_t LTC2473_write | ( | uint8_t | i2c_address, |
uint8_t | adc_command | ||
) |
Writes to the LTC2473.
i2c_address | I2C address (7-bit format) for part |
adc_command | Command byte written to LTC2473 |
Definition at line 85 of file LTC2473.cpp.
#define LTC2473_I2C_ADDRESS 0x14 |