Linduino  1.3.0
Linear Technology Arduino-Compatible Demonstration Board

LTC6903: 1kHz to 68MHz Serial Port Programmable Oscillator. More...

Detailed Description

LTC6903: 1kHz to 68MHz Serial Port Programmable Oscillator.

The LTC6903/LTC6904 are low power self contained digital
frequency sources providing a precision frequency from
1kHz to 68MHz, set through a serial port. The LTC6903/
LTC6904 require no external components other than a
power supply bypass capacitor, and they operate over a
single wide supply range of 2.7V to 5.5V.

http://www.linear.com/product/LTC6903

http://www.linear.com/product/LTC6903#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.

Library Header File for LTC6903: 1kHz to 68MHz Serial Port Programmable Oscillator

Definition in file LTC6903.h.

Go to the source code of this file.

Functions

void LTC6903_write (uint8_t cs, uint16_t code)
 Writes 2 bytes. More...
 
uint16_t LTC6903_frequency_to_code (float frequency, uint8_t clk)
 Calculates the code necessary to create the clock frequency. More...
 

Macros

#define LTC6903_CS   QUIKEVAL_CS
 Define the SPI CS pin. More...
 
#define LTC6903_CLK_ON_CLK_INV_ON   0x00
 Clock on, inverted clock on. More...
 
#define LTC6903_CLK_OFF_CLK_INV_ON   0x01
 Clock off, inverted clock on. More...
 
#define LTC6903_CLK_ON_CLK_INV_OFF   0x02
 Clock on, inverted clock off. More...
 
#define LTC6903_POWER_DOWN   0x03
 Powers down clocks. More...
 
#define LTC6903_OCT_15   0x0F
 
OCT Options f>= (MHz) f< (MHz)
LTC6903_OCT_15 34.05 68.03
LTC6903_OCT_14 17.02 34.01
LTC6903_OCT_13 8.5111 17.01
LTC6903_OCT_12 4.256 8.503
LTC6903_OCT_11 2.128 4.252
LTC6903_OCT_10 1.064 2.126
LTC6903_OCT_9 0.532 1.063
LTC6903_OCT_8 0.266 0.5314
LTC6903_OCT_7 0.133 0.2657
LTC6903_OCT_6 0.0665 0.1329
LTC6903_OCT_5 0.03325 0.06643
LTC6903_OCT_4 0.01662 0.03322
LTC6903_OCT_3 0.008312 0.01661
LTC6903_OCT_2 0.004156 0.008304
LTC6903_OCT_1 0.002078 0.004152
LTC6903_OCT_0 0.001039 0.002076
More...
 
#define LTC6903_OCT_14   0x0E
 
#define LTC6903_OCT_13   0x0D
 
#define LTC6903_OCT_12   0x0C
 
#define LTC6903_OCT_11   0x0B
 
#define LTC6903_OCT_10   0x0A
 
#define LTC6903_OCT_9   0x09
 
#define LTC6903_OCT_8   0x08
 
#define LTC6903_OCT_7   0x07
 
#define LTC6903_OCT_6   0x06
 
#define LTC6903_OCT_5   0x05
 
#define LTC6903_OCT_4   0x04
 
#define LTC6903_OCT_3   0x03
 
#define LTC6903_OCT_2   0x02
 
#define LTC6903_OCT_1   0x01
 
#define LTC6903_OCT_0   0x00
 

Function Documentation

◆ LTC6903_frequency_to_code()

uint16_t LTC6903_frequency_to_code ( float  frequency,
uint8_t  clk 
)

Calculates the code necessary to create the clock frequency.

Returns
the code for the LTC6903
Parameters
frequencyClock frequency in MHz
clkOutput configuration

Definition at line 81 of file LTC6903.cpp.

◆ LTC6903_write()

void LTC6903_write ( uint8_t  cs,
uint16_t  code 
)

Writes 2 bytes.

Returns
1 if successful, 0 if failure
Parameters
csChip Select Pin
codeCode to be written

Definition at line 73 of file LTC6903.cpp.

Macro Definition Documentation

◆ LTC6903_CLK_OFF_CLK_INV_ON

#define LTC6903_CLK_OFF_CLK_INV_ON   0x01

Clock off, inverted clock on.

Definition at line 112 of file LTC6903.h.

◆ LTC6903_CLK_ON_CLK_INV_OFF

#define LTC6903_CLK_ON_CLK_INV_OFF   0x02

Clock on, inverted clock off.

Definition at line 113 of file LTC6903.h.

◆ LTC6903_CLK_ON_CLK_INV_ON

#define LTC6903_CLK_ON_CLK_INV_ON   0x00

Clock on, inverted clock on.

Definition at line 111 of file LTC6903.h.

◆ LTC6903_CS

#define LTC6903_CS   QUIKEVAL_CS

Define the SPI CS pin.

Definition at line 66 of file LTC6903.h.

◆ LTC6903_OCT_0

#define LTC6903_OCT_0   0x00

Definition at line 107 of file LTC6903.h.

◆ LTC6903_OCT_1

#define LTC6903_OCT_1   0x01

Definition at line 106 of file LTC6903.h.

◆ LTC6903_OCT_10

#define LTC6903_OCT_10   0x0A

Definition at line 97 of file LTC6903.h.

◆ LTC6903_OCT_11

#define LTC6903_OCT_11   0x0B

Definition at line 96 of file LTC6903.h.

◆ LTC6903_OCT_12

#define LTC6903_OCT_12   0x0C

Definition at line 95 of file LTC6903.h.

◆ LTC6903_OCT_13

#define LTC6903_OCT_13   0x0D

Definition at line 94 of file LTC6903.h.

◆ LTC6903_OCT_14

#define LTC6903_OCT_14   0x0E

Definition at line 93 of file LTC6903.h.

◆ LTC6903_OCT_15

#define LTC6903_OCT_15   0x0F

OCT Options f>= (MHz) f< (MHz)
LTC6903_OCT_15 34.05 68.03
LTC6903_OCT_14 17.02 34.01
LTC6903_OCT_13 8.5111 17.01
LTC6903_OCT_12 4.256 8.503
LTC6903_OCT_11 2.128 4.252
LTC6903_OCT_10 1.064 2.126
LTC6903_OCT_9 0.532 1.063
LTC6903_OCT_8 0.266 0.5314
LTC6903_OCT_7 0.133 0.2657
LTC6903_OCT_6 0.0665 0.1329
LTC6903_OCT_5 0.03325 0.06643
LTC6903_OCT_4 0.01662 0.03322
LTC6903_OCT_3 0.008312 0.01661
LTC6903_OCT_2 0.004156 0.008304
LTC6903_OCT_1 0.002078 0.004152
LTC6903_OCT_0 0.001039 0.002076

Definition at line 92 of file LTC6903.h.

◆ LTC6903_OCT_2

#define LTC6903_OCT_2   0x02

Definition at line 105 of file LTC6903.h.

◆ LTC6903_OCT_3

#define LTC6903_OCT_3   0x03

Definition at line 104 of file LTC6903.h.

◆ LTC6903_OCT_4

#define LTC6903_OCT_4   0x04

Definition at line 103 of file LTC6903.h.

◆ LTC6903_OCT_5

#define LTC6903_OCT_5   0x05

Definition at line 102 of file LTC6903.h.

◆ LTC6903_OCT_6

#define LTC6903_OCT_6   0x06

Definition at line 101 of file LTC6903.h.

◆ LTC6903_OCT_7

#define LTC6903_OCT_7   0x07

Definition at line 100 of file LTC6903.h.

◆ LTC6903_OCT_8

#define LTC6903_OCT_8   0x08

Definition at line 99 of file LTC6903.h.

◆ LTC6903_OCT_9

#define LTC6903_OCT_9   0x09

Definition at line 98 of file LTC6903.h.

◆ LTC6903_POWER_DOWN

#define LTC6903_POWER_DOWN   0x03

Powers down clocks.

Definition at line 114 of file LTC6903.h.