Linduino  1.3.0
Linear Technology Arduino-Compatible Demonstration Board
LTC2338.h
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1 /*!
2 LTC2326-16: 16-Bit, 250ksps Pseudo-differential input ADC.
3 LTC2326-18: 18-Bit, 250ksps Pseudo-differential input ADC.
4 LTC2327-16: 16-Bit, 500ksps Pseudo-differential input ADC
5 LTC2327-18: 18-Bit, 500ksps Pseudo-differential input ADC
6 LTC2328-16: 16-Bit, 1Msps Pseudo-differential input ADC
7 LTC2328-18: 18-Bit, 1Msps Pseudo-differential input ADC
8 LTC2336-18: 18-Bit, 250ksps Fully-differential input ADC
9 LTC2337-18: 18-Bit, 500ksps Fully-differential ADC
10 LTC2338-18: 18-Bit, 1Msps Fully-differential input ADC
11 
12 @verbatim
13 
14 The following parts (DUT) are pin-compatible, 16/18-bit A/D converters with serial I/O, and an internal reference:
15 LTC2326-16: 16-Bit, 250ksps Pseudo-differential input ADC.
16 LTC2326-18: 18-Bit, 250ksps Pseudo-differential input ADC.
17 LTC2327-16: 16-Bit, 500ksps Pseudo-differential input ADC
18 LTC2327-18: 18-Bit, 500ksps Pseudo-differential input ADC
19 LTC2328-16: 16-Bit, 1Msps Pseudo-differential input ADC
20 LTC2328-18: 18-Bit, 1Msps Pseudo-differential input ADC
21 LTC2336-18: 18-Bit, 250ksps Fully-differential input ADC
22 LTC2337-18: 18-Bit, 500ksps Fully-differential ADC
23 LTC2338-18: 18-Bit, 1Msps Fully-differential input ADC
24 
25 Example Code:
26 
27 Read ADC input.
28 
29  LTC2338_read(LTC2338_CS, &adc_code); // Throws out last reading
30  LTC2338_read(LTC2338_CS, &adc_code); // Obtains the current reading and stores to adc_code variable
31 
32  // Convert adc_code to voltage
33  adc_voltage = LTC2338_code_to_voltage(adc_code, vref);
34 
35 @endverbatim
36 
37 http://www.linear.com/product/LTC2326-16
38 http://www.linear.com/product/LTC2326-18
39 http://www.linear.com/product/LTC2327-16
40 http://www.linear.com/product/LTC2327-18
41 http://www.linear.com/product/LTC2328-16
42 http://www.linear.com/product/LTC2328-18
43 http://www.linear.com/product/LTC2336-18
44 http://www.linear.com/product/LTC2337-18
45 http://www.linear.com/product/LTC2338-18
46 
47 http://www.linear.com/product/LTC2326-16#demoboards
48 http://www.linear.com/product/LTC2326-18#demoboards
49 http://www.linear.com/product/LTC2327-16#demoboards
50 http://www.linear.com/product/LTC2327-18#demoboards
51 http://www.linear.com/product/LTC2328-16#demoboards
52 http://www.linear.com/product/LTC2328-18#demoboards
53 http://www.linear.com/product/LTC2336-18#demoboards
54 http://www.linear.com/product/LTC2337-18#demoboards
55 http://www.linear.com/product/LTC2338-18#demoboards
56 
57 
58 Copyright 2018(c) Analog Devices, Inc.
59 
60 All rights reserved.
61 
62 Redistribution and use in source and binary forms, with or without
63 modification, are permitted provided that the following conditions are met:
64  - Redistributions of source code must retain the above copyright
65  notice, this list of conditions and the following disclaimer.
66  - Redistributions in binary form must reproduce the above copyright
67  notice, this list of conditions and the following disclaimer in
68  the documentation and/or other materials provided with the
69  distribution.
70  - Neither the name of Analog Devices, Inc. nor the names of its
71  contributors may be used to endorse or promote products derived
72  from this software without specific prior written permission.
73  - The use of this software may or may not infringe the patent rights
74  of one or more patent holders. This license does not release you
75  from the requirement that you obtain separate licenses from these
76  patent holders to use this software.
77  - Use of the software either in source or binary form, must be run
78  on or directly connected to an Analog Devices Inc. component.
79 
80 THIS SOFTWARE IS PROVIDED BY ANALOG DEVICES "AS IS" AND ANY EXPRESS OR
81 IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, NON-INFRINGEMENT,
82 MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
83 IN NO EVENT SHALL ANALOG DEVICES BE LIABLE FOR ANY DIRECT, INDIRECT,
84 INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
85 LIMITED TO, INTELLECTUAL PROPERTY RIGHTS, PROCUREMENT OF SUBSTITUTE GOODS OR
86 SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
87 CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
88 OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
89 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
90 */
91 
92 /*! @file
93  @ingroup LTC2338
94  Header for LTC2338: 16/18-bit 1Msps ADC
95 */
96 
97 #ifndef LTC2338_H
98 #define LTC2338_H
99 
100 #include <SPI.h>
101 
102 //! Define the SPI CS pin
103 #ifndef LTC2338_CS
104 #define LTC2338_CS QUIKEVAL_CS
105 #endif
106 
107 //! @name LTC2338 Channel Address
108 //! @{
109 // Channel Address
110 #define LTC2338_ADDRESS 0x00
111 //!@}
112 
113 
114 //! Reads the LTC2338 and returns 32-bit data in 2's complement format
115 //! @return void
116 void LTC2338_read(uint8_t cs, //!< Chip Select Pin
117  int32_t *ptr_adc_code //!< Returns code read from ADC (from previous conversion)
118  );
119 
120 
121 //! Calculates the LTC2338 input voltage given the binary data and lsb weight.
122 //! @return Floating point voltage
123 float LTC2338_code_to_voltage(int32_t adc_code, //!< Raw ADC code
124  float vref //!< Reference voltage
125  );
126 
127 #endif // LTC2338_H
128 
129 
float LTC2338_code_to_voltage(int32_t adc_code, float vref)
Calculates the LTC2338 input voltage given the binary data and lsb weight.
Definition: LTC2338.cpp:123
void LTC2338_read(uint8_t cs, int32_t *ptr_adc_code)
Reads the LTC2338 and returns 32-bit data in 2&#39;s complement format.
Definition: LTC2338.cpp:101
static uint32_t adc_code
Definition: DC2071AA.ino:113