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Linduino
1.3.0
Linear Technology Arduino-Compatible Demonstration Board
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LTC2308: 16-bit 8-channel 100ksps ADC. More...
LTC2308: 16-bit 8-channel 100ksps ADC.
The LTC2308 is an 8-channel 12-bit A/D converter with with serial I/O, and an internal reference. The ADCs typically draw only 1.3mA from a single 5V supply. The 8-channel input multiplexer can be configured for either single-ended or differential inputs and unipolar or bipolar conversions (or combinations thereof). The automatic nap and sleep modes benefit power sensitive applications. The LTC2308's DC performance is outstanding with a +/-2LSB INL specification and no missing codes over temperature. The signal-to-noise ratio (SNR) for the LTC2308 is typically 89dB, with the internal reference. SPI DATA FORMAT (MSB First): Byte #1 Byte #2 Data Out : D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 Data In : SD OS S1 S0 UNI GAIN NAP SLP X X X X X X X X SD : Single/Differential Bit OS : ODD/Sign Bit Sx : Address Select Bit UNI : Unipolar/Bipolar Bit GAIN : Input Span Bit NAP : Nap Mode Bit SLP : Sleep Mode Bit Dx : Data Bits X : Don't care Example Code: Read Channel 0 in Single-Ended Unipolar mode when input is with respect to GND adc_command = LTC2308_CH0 | LTC2308_UNIPOLAR_MODE | LTC2308_LOW_GAIN_MODE | LTC2308_NORMAL_MODE; // Single-ended, CH0, unipolar, low gain, normal mode. LTC2308_read(LTC2308_CS, adc_command, &adc_code); // Throws out last reading LTC2308_read(LTC2308_CS, adc_command, &adc_code); // Obtains the current reading and stores to adc_code variable // Convert adc_code to voltage adc_voltage = LTC2308_unipolar_code_to_voltage(adc_code, LTC2308_lsb, LTC2308_offset_unipolar_code);
http://www.linear.com/product/LTC2308
http://www.linear.com/product/LTC2308#demoboards
Copyright 2018(c) Analog Devices, Inc.
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Header for LTC2308: 16-bit 8-channel 100ksps ADC
Definition in file LTC2308.h.
Go to the source code of this file.
Functions | |
void | LTC2308_read (uint8_t cs, uint8_t adc_command, uint16_t *adc_code) |
Reads the ADC and returns 16-bit data. More... | |
float | LTC2308_code_to_voltage (uint16_t adc_code, float vref, uint8_t uni_bipolar) |
Calculates the LTC2308 input's unipolar voltage given the binary data and lsb weight. More... | |
Macros | |
#define | LTC2308_CS QUIKEVAL_CS |
Define the SPI CS pin. More... | |
LTC2308 Single-Ended Channel Addresses | |
#define | LTC2308_CH0 0x80 |
#define | LTC2308_CH1 0xC0 |
#define | LTC2308_CH2 0x90 |
#define | LTC2308_CH3 0xD0 |
#define | LTC2308_CH4 0xA0 |
#define | LTC2308_CH5 0xE0 |
#define | LTC2308_CH6 0xB0 |
#define | LTC2308_CH7 0xF0 |
LTC2308 Differential Channel Addresses | |
#define | LTC2308_P0_N1 0x00 |
#define | LTC2308_P1_N0 0x40 |
#define | LTC2308_P2_N3 0x10 |
#define | LTC2308_P3_N2 0x50 |
#define | LTC2308_P4_N5 0x20 |
#define | LTC2308_P5_N4 0x60 |
#define | LTC2308_P6_N7 0x30 |
#define | LTC2308_P7_N6 0x70 |
LTC2308 Uni/GAIN config bits | |
#define | LTC2308_UNIPOLAR_MODE 0x08 |
#define | LTC2308_BIPOLAR_MODE 0x00 |
#define | LTC2308_SINGLE_ENDED_MODE 0x80 |
#define | LTC2308_DIFFERENTIAL_MODE 0x00 |
LTC2308 Sleep/Nap config bits | |
#define | LTC2308_SLEEP_MODE 0x01 |
#define | LTC2308_NORMAL_MODE 0x00 |
#define | LTC2308_NAP_MODE 0x02 |
float LTC2308_code_to_voltage | ( | uint16_t | adc_code, |
float | vref, | ||
uint8_t | uni_bipolar | ||
) |
Calculates the LTC2308 input's unipolar voltage given the binary data and lsb weight.
adc_code | Raw ADC code |
Definition at line 84 of file LTC2308.cpp.
void LTC2308_read | ( | uint8_t | cs, |
uint8_t | adc_command, | ||
uint16_t * | adc_code | ||
) |
Reads the ADC and returns 16-bit data.
cs | Chip Select Pin |
adc_command | Channel address, config bits ORed together |
adc_code | Returns code read from ADC (from previous conversion) |
Definition at line 77 of file LTC2308.cpp.
#define LTC2308_CS QUIKEVAL_CS |