Linduino  1.3.0
Linear Technology Arduino-Compatible Demonstration Board

LTC6602: Dual, Matched, High Frequency Bandpass/Lowpass Filters. More...

Detailed Description

LTC6602: Dual, Matched, High Frequency Bandpass/Lowpass Filters.

The LTC6602 is a dual, matched, programmable bandpass or lowpass filter
and differential driver. The selectivity of the LTC6602, combined with its
phase matching and dynamic range, make it ideal for filtering in RFID
systems. With two degree phase matching between channels, the LTC6602 can
be used in applications requiring highly matched filters, such as
transceiver I and Q channels. Gain programmability, and the fully
differential inputs and outputs, simplify implementation in most systems.

SPI DATA FORMAT (MSB First):

            Byte #1                                      Byte #2

Data In  :  GAIN0 GAIN1 LPF0 LPF1 HPF0 HPF1 SHDN OUT     GAIN0 GAIN1 LPF0 LPF1 HPF0 HPF1 SHDN OUT
            |---- GAIN, BW CONTROL WORD FOR #2 ----|     |---- GAIN, BW CONTROL WORD FOR #1 ----|

GAINx : Gain Control Bits
LPFx  : Lowpass Cutoff Frequency Bits
HPFx  : Highpass Cutoff Frequency Bits
SHDN  : Shutdown Bit
OUT   : General Purpose Output Pin

http://www.linear.com/product/LTC6602

http://www.linear.com/product/LTC6602#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.

Header for LTC6602: Dual Matched, High Frequency Bandpass/Lowpass Filters

Definition in file LTC6602.h.

Go to the source code of this file.

Macros

#define LTC6602_CS   QUIKEVAL_CS
 Define the SPI CS pin. More...
 
LTC6602 gain configuration bits.

Refer to Table 1 in Data Sheet

#define LTC6602_GAIN_0dB   0x00
 
#define LTC6602_GAIN_12dB   0x80
 
#define LTC6602_GAIN_24dB   0x40
 
#define LTC6602_GAIN_30dB   0xC0
 
#define LTC6602_GAIN_MASK   0x3F
 
LTC6602 lowpass cutoff frequency configuration bits.

Refer to Table 2 and 3 for Bandwidth

#define LTC6602_LPF0   0x00
 
#define LTC6602_LPF1   0x20
 
#define LTC6602_LPF2   0x10
 
#define LTC6602_LPF3   0x30
 
#define LTC6602_LPF_MASK   0xCF
 
LTC6602 Highpass cutoff frequency configuration bits.

Refer to Table 2 and 3 for Bandwidth

#define LTC6602_HPF0   0x00
 
#define LTC6602_HPF1   0x08
 
#define LTC6602_HPF2   0x04
 
#define LTC6602_HPF3   0x0C
 
#define LTC6602_HPF_MASK   0xF3
 

LTC6602 shutdown/powerup and GPO configuration bits.

#define LTC6602_SHDN   0x02
 Shuts down LTC6602. More...
 
#define LTC6602_PRUP   0x00
 Turns on LTC6602. More...
 
#define LTC6602_ONOFF_MASK   0xFD
 
#define LTC6602_GPO_HIGH   0x01
 Sets the general purpose. More...
 
#define LTC6602_GPO_LOW   0x00
 
#define LTC6602_GPO_MASK   0xFE
 
void LTC6602_write (uint8_t cs, uint8_t *tx, uint8_t length)
 Sends Data to the LTC6602. More...
 

Function Documentation

◆ LTC6602_write()

void LTC6602_write ( uint8_t  cs,
uint8_t *  tx,
uint8_t  length 
)

Sends Data to the LTC6602.

Returns
void
Parameters
csChip Select pin
txByte array to be transmitted
lengthLength of array

Definition at line 72 of file LTC6602.cpp.

Macro Definition Documentation

◆ LTC6602_CS

#define LTC6602_CS   QUIKEVAL_CS

Define the SPI CS pin.

Definition at line 80 of file LTC6602.h.

◆ LTC6602_GAIN_0dB

#define LTC6602_GAIN_0dB   0x00

Definition at line 86 of file LTC6602.h.

◆ LTC6602_GAIN_12dB

#define LTC6602_GAIN_12dB   0x80

Definition at line 87 of file LTC6602.h.

◆ LTC6602_GAIN_24dB

#define LTC6602_GAIN_24dB   0x40

Definition at line 88 of file LTC6602.h.

◆ LTC6602_GAIN_30dB

#define LTC6602_GAIN_30dB   0xC0

Definition at line 89 of file LTC6602.h.

◆ LTC6602_GAIN_MASK

#define LTC6602_GAIN_MASK   0x3F

Definition at line 90 of file LTC6602.h.

◆ LTC6602_GPO_HIGH

#define LTC6602_GPO_HIGH   0x01

Sets the general purpose.

Definition at line 120 of file LTC6602.h.

◆ LTC6602_GPO_LOW

#define LTC6602_GPO_LOW   0x00

Definition at line 121 of file LTC6602.h.

◆ LTC6602_GPO_MASK

#define LTC6602_GPO_MASK   0xFE

Definition at line 122 of file LTC6602.h.

◆ LTC6602_HPF0

#define LTC6602_HPF0   0x00

Definition at line 108 of file LTC6602.h.

◆ LTC6602_HPF1

#define LTC6602_HPF1   0x08

Definition at line 109 of file LTC6602.h.

◆ LTC6602_HPF2

#define LTC6602_HPF2   0x04

Definition at line 110 of file LTC6602.h.

◆ LTC6602_HPF3

#define LTC6602_HPF3   0x0C

Definition at line 111 of file LTC6602.h.

◆ LTC6602_HPF_MASK

#define LTC6602_HPF_MASK   0xF3

Definition at line 112 of file LTC6602.h.

◆ LTC6602_LPF0

#define LTC6602_LPF0   0x00

Definition at line 97 of file LTC6602.h.

◆ LTC6602_LPF1

#define LTC6602_LPF1   0x20

Definition at line 98 of file LTC6602.h.

◆ LTC6602_LPF2

#define LTC6602_LPF2   0x10

Definition at line 99 of file LTC6602.h.

◆ LTC6602_LPF3

#define LTC6602_LPF3   0x30

Definition at line 100 of file LTC6602.h.

◆ LTC6602_LPF_MASK

#define LTC6602_LPF_MASK   0xCF

Definition at line 101 of file LTC6602.h.

◆ LTC6602_ONOFF_MASK

#define LTC6602_ONOFF_MASK   0xFD

Definition at line 119 of file LTC6602.h.

◆ LTC6602_PRUP

#define LTC6602_PRUP   0x00

Turns on LTC6602.

Definition at line 118 of file LTC6602.h.

◆ LTC6602_SHDN

#define LTC6602_SHDN   0x02

Shuts down LTC6602.

Definition at line 117 of file LTC6602.h.