Linduino  1.3.0
Linear Technology Arduino-Compatible Demonstration Board

LTC2600: Octal 16-Bit Rail-to-Rail DACs in 16-Lead SSOP. More...

Detailed Description

LTC2600: Octal 16-Bit Rail-to-Rail DACs in 16-Lead SSOP.

The LTC2600/LTC2610/LTC2620 are octal 16-, 14- and 12-bit, 2.5V-to-5.5V
rail-to-rail voltage-output DACs in 16-lead narrow SSOP and 20-lead 4mm × 5mm
QFN packages. They have built-in high performance output buffers and are
guaranteed monotonic.

These parts establish advanced performance standards for output drive,
crosstalk and load regulation in single-supply, voltage output multiples.

SPI DATA FORMAT (MSB First):

24-Bit Load Sequence:

             Byte #1                   Byte #2                         Byte #3
             Command                   MSB                             LSB
LTC2600-16 : C3 C2 C1 C0 A3 A2 A1 A0   D15 D14 D13 D12 D11 D10 D9 D8   D7 D6 D5 D4 D3 D2 D1 D0
LTC2610-14 : C3 C2 C1 C0 A3 A2 A1 A0   D13 D12 D11 D10 D9  D8  D7 D6   D5 D4 D3 D2 D1 D0 X  X
LTC2620-12 : C3 C2 C1 C0 A3 A2 A1 A0   D11 D10 D9  D8  D7  D6  D5 D4   D3 D2 D1 D0 X  X  X  X

32-Bit Load Sequence:

             Byte #1                   Byte #2                   Byte #3                         Byte #4
             Command                   MSB                                                       LSB
LTC2600-16 : X  X  X  X  X  X  X  X    C3 C2 C1 C0 A3 A2 A1 A0   D15 D14 D13 D12 D11 D10 D9 D8   D7 D6 D5 D4 D3 D2 D1 D0
LTC2610-14 : X  X  X  X  X  X  X  X    C3 C2 C1 C0 A3 A2 A1 A0   D13 D12 D11 D10 D9  D8  D7 D6   D5 D4 D3 D2 D1 D0 X  X
LTC2620-12 : X  X  X  X  X  X  X  X    C3 C2 C1 C0 A3 A2 A1 A0   D11 D10 D9  D8  D7  D6  D5 D4   D3 D2 D1 D0 X  X  X  X

Cx   : DAC Command Code
Ax   : DAC Address (0=DACA, 1=DACB, 2=DACC, 3=DACD, 0xFF=All DACs)
Dx   : DAC Data Bits
X    : Don't care


Example Code:

Set DAC A to to 2V for 16-bit DAC.

    shift_count = 0;    // 16-bit DAC does not have to be shifted
    dac_voltage = 2.0;  // Sets dac voltage variable to 2v

    dac_code = LTC2600_voltage_to_code(dac_voltage, LTC2600_lsb, LTC2600_offset);       // Calculate DAC code from voltage, lsb, and offset
    LTC2600_write(LTC2600_CS, LTC2600_CMD_WRITE_UPDATE, LTC2600_DAC_A, dac_code << shift_count);    // Set DAC A with DAC code

http://www.linear.com/product/LTC2600

http://www.linear.com/product/LTC2600#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.
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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 LTC2600: Octal 16-Bit Rail-to-Rail DACs in 16-Lead SSOP

Definition in file LTC2600.h.

Go to the source code of this file.

Macros

#define LTC2600_CS   QUIKEVAL_CS
 Define the SPI CS pin. More...
 
LTC2600 Command Codes

OR'd together with the DAC address to form the command byte

#define LTC2600_CMD_WRITE   0x00
 Write to input register n. More...
 
#define LTC2600_CMD_UPDATE   0x10
 Update (power up) DAC register n. More...
 
#define LTC2600_CMD_WRITE_UPDATE_ALL   0x20
 Write to input register n, update (power up) all. More...
 
#define LTC2600_CMD_WRITE_UPDATE   0x30
 Write to input register n, update (power up) all. More...
 
#define LTC2600_CMD_POWER_DOWN   0x40
 Power down n. More...
 
#define LTC2600_CMD_NO_OPERATION   0xF0
 No operation. More...
 

Dac Addresses

DAC Addresses Value
LTC2605_DAC_A 0x00
LTC2605_DAC_B 0x01
LTC2605_DAC_C 0x02
LTC2605_DAC_D 0x03
LTC2605_DAC_E 0x04
LTC2605_DAC_F 0x05
LTC2605_DAC_G 0x06
LTC2605_DAC_H 0x07
LTC2605_DAC_ALL 0x0F
#define LTC2600_DAC_A   0x00
 
#define LTC2600_DAC_B   0x01
 
#define LTC2600_DAC_C   0x02
 
#define LTC2600_DAC_D   0x03
 
#define LTC2600_DAC_E   0x04
 
#define LTC2600_DAC_F   0x05
 
#define LTC2600_DAC_G   0x06
 
#define LTC2600_DAC_H   0x07
 
#define LTC2600_DAC_ALL   0x0F
 
void LTC2600_write (uint8_t cs, uint8_t dac_command, uint8_t dac_address, uint16_t dac_code)
 Write the 16-bit dac_code to the LTC2600. More...
 
uint16_t LTC2600_voltage_to_code (float dac_voltage, float LTC2600_lsb, int16_t LTC2600_offset)
 Calculate a LTC2600 DAC code given the desired output voltage and DAC address (0-3) More...
 
float LTC2600_code_to_voltage (uint16_t dac_code, float LTC2600_lsb, int16_t LTC2600_offset)
 Calculate the LTC2600 DAC output voltage given the DAC code, offset, and LSB value. More...
 

Function Documentation

◆ LTC2600_code_to_voltage()

float LTC2600_code_to_voltage ( uint16_t  dac_code,
float  LTC2600_lsb,
int16_t  LTC2600_offset 
)

Calculate the LTC2600 DAC output voltage given the DAC code, offset, and LSB value.

Returns
Calculated voltage
Parameters
dac_codeDAC code
LTC2600_lsbLSB value (volts)
LTC2600_offsetOffset (volts)

Definition at line 103 of file LTC2600.cpp.

◆ LTC2600_voltage_to_code()

uint16_t LTC2600_voltage_to_code ( float  dac_voltage,
float  LTC2600_lsb,
int16_t  LTC2600_offset 
)

Calculate a LTC2600 DAC code given the desired output voltage and DAC address (0-3)

Returns
The 16-bit code to send to the DAC
Parameters
dac_voltageVoltage to send to DAC
LTC2600_lsbLSB value (volts)
LTC2600_offsetOffset (volts)

Definition at line 90 of file LTC2600.cpp.

◆ LTC2600_write()

void LTC2600_write ( uint8_t  cs,
uint8_t  dac_command,
uint8_t  dac_address,
uint16_t  dac_code 
)

Write the 16-bit dac_code to the LTC2600.

Returns
Void
Parameters
csChip Select Pin
dac_commandCommand Nibble, left-justified, lower nibble set to zero
dac_addressDAC Address Nibble, right justified, upper nibble set to zero
dac_code16-bit DAC code

Definition at line 75 of file LTC2600.cpp.

Macro Definition Documentation

◆ LTC2600_CMD_NO_OPERATION

#define LTC2600_CMD_NO_OPERATION   0xF0

No operation.

Definition at line 116 of file LTC2600.h.

◆ LTC2600_CMD_POWER_DOWN

#define LTC2600_CMD_POWER_DOWN   0x40

Power down n.

Definition at line 115 of file LTC2600.h.

◆ LTC2600_CMD_UPDATE

#define LTC2600_CMD_UPDATE   0x10

Update (power up) DAC register n.

Definition at line 112 of file LTC2600.h.

◆ LTC2600_CMD_WRITE

#define LTC2600_CMD_WRITE   0x00

Write to input register n.

Definition at line 111 of file LTC2600.h.

◆ LTC2600_CMD_WRITE_UPDATE

#define LTC2600_CMD_WRITE_UPDATE   0x30

Write to input register n, update (power up) all.

Definition at line 114 of file LTC2600.h.

◆ LTC2600_CMD_WRITE_UPDATE_ALL

#define LTC2600_CMD_WRITE_UPDATE_ALL   0x20

Write to input register n, update (power up) all.

Definition at line 113 of file LTC2600.h.

◆ LTC2600_CS

#define LTC2600_CS   QUIKEVAL_CS

Define the SPI CS pin.

Definition at line 104 of file LTC2600.h.

◆ LTC2600_DAC_A

#define LTC2600_DAC_A   0x00

Definition at line 136 of file LTC2600.h.

◆ LTC2600_DAC_ALL

#define LTC2600_DAC_ALL   0x0F

Definition at line 144 of file LTC2600.h.

◆ LTC2600_DAC_B

#define LTC2600_DAC_B   0x01

Definition at line 137 of file LTC2600.h.

◆ LTC2600_DAC_C

#define LTC2600_DAC_C   0x02

Definition at line 138 of file LTC2600.h.

◆ LTC2600_DAC_D

#define LTC2600_DAC_D   0x03

Definition at line 139 of file LTC2600.h.

◆ LTC2600_DAC_E

#define LTC2600_DAC_E   0x04

Definition at line 140 of file LTC2600.h.

◆ LTC2600_DAC_F

#define LTC2600_DAC_F   0x05

Definition at line 141 of file LTC2600.h.

◆ LTC2600_DAC_G

#define LTC2600_DAC_G   0x06

Definition at line 142 of file LTC2600.h.

◆ LTC2600_DAC_H

#define LTC2600_DAC_H   0x07

Definition at line 143 of file LTC2600.h.