Linduino  1.3.0
Linear Technology Arduino-Compatible Demonstration Board

LTC6603: Dual, Matched, High Frequency Bandpass/Lowpass Filters. More...

Detailed Description

LTC6603: Dual, Matched, High Frequency Bandpass/Lowpass Filters.

The LTC6603 is a dual, matched, programmable bandpass or lowpass filter
and differential driver. The selectivity of the LTC6603, combined with its
phase matching and dynamic range, make it ideal for filtering in RFID
systems. With two degree phase matching between channels, the LTC6603 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 NOFUNC0 NOFUNC1 SHDN OUT     GAIN0 GAIN1 LPF0 LPF1 NOFUNC0 NOFUNC1 SHDN OUT
            |---- GAIN, BW CONTROL WORD FOR #2 ----|     |---- GAIN, BW CONTROL WORD FOR #1 ----|

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

http://www.analog.com/en/products/amplifiers/adc-drivers/fully-differential-amplifiers/ltc6603.html

http://www.analog.com/en/design-center/evaluation-hardware-and-software/evaluation-boards-kits/dc1304a-b.html

Copyright 2018(c) Analog Devices, Inc.

All rights reserved.

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Header for LTC6603: Dual Matched, High Frequency Bandpass/Lowpass Filters

Definition in file LTC6603.h.

Go to the source code of this file.

Macros

#define LTC6603_FREQ_MIN   12
 Define external frequency range. More...
 
#define LTC6603_FREQ_MAX   80
 80 Mhz More...
 
#define LTC6603_CS   QUIKEVAL_CS
 Define the SPI CS pin. More...
 
LTC6603 gain configuration bits.

Refer to Table 1 in Data Sheet

#define LTC6603_GAIN_0dB   0x00
 
#define LTC6603_GAIN_6dB   0x80
 
#define LTC6603_GAIN_12dB   0x40
 
#define LTC6603_GAIN_24dB   0xC0
 
#define LTC6603_GAIN_MASK   0x3F
 
LTC6603 lowpass cutoff frequency configuration bits.

Refer to Table 2 and 3 for Bandwidth

#define LTC6603_LPF0   0x00
 
#define LTC6603_LPF1   0x20
 
#define LTC6603_LPF2   0x10
 
#define LTC6603_LPF3   0x30
 
#define LTC6603_LPF_MASK   0xCF
 
LTC6603 Highpass cutoff frequency configuration bits.

Refer to Table 2 and 3 for Bandwidth

#define LTC6603_NOFUNC0   0x00
 
#define LTC6603_NOFUNC1   0x08
 
#define LTC6603_NOFUNC2   0x04
 
#define LTC6603_NOFUNC3   0x0C
 
#define LTC6603_NOFUNC_MASK   0xF3
 

LTC6603 shutdown/powerup and GPO configuration bits.

#define LTC6603_SHDN   0x02
 Shuts down LTC6603. More...
 
#define LTC6603_PRUP   0x00
 Turns on LTC6603. More...
 
#define LTC6603_ONOFF_MASK   0xFD
 
#define LTC6603_GPO_HIGH   0x01
 Sets the general purpose. More...
 
#define LTC6603_GPO_LOW   0x00
 
#define LTC6603_GPO_MASK   0xFE
 
void LTC6603_write (uint8_t cs, uint8_t *tx, uint8_t length)
 Sends Data to the LTC6603. More...
 

Function Documentation

◆ LTC6603_write()

void LTC6603_write ( uint8_t  cs,
uint8_t *  tx,
uint8_t  length 
)

Sends Data to the LTC6603.

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

Definition at line 89 of file LTC6603.cpp.

Macro Definition Documentation

◆ LTC6603_CS

#define LTC6603_CS   QUIKEVAL_CS

Define the SPI CS pin.

Definition at line 96 of file LTC6603.h.

◆ LTC6603_FREQ_MAX

#define LTC6603_FREQ_MAX   80

80 Mhz

Definition at line 92 of file LTC6603.h.

◆ LTC6603_FREQ_MIN

#define LTC6603_FREQ_MIN   12

Define external frequency range.

12 MHz

Definition at line 91 of file LTC6603.h.

◆ LTC6603_GAIN_0dB

#define LTC6603_GAIN_0dB   0x00

Definition at line 102 of file LTC6603.h.

◆ LTC6603_GAIN_12dB

#define LTC6603_GAIN_12dB   0x40

Definition at line 104 of file LTC6603.h.

◆ LTC6603_GAIN_24dB

#define LTC6603_GAIN_24dB   0xC0

Definition at line 105 of file LTC6603.h.

◆ LTC6603_GAIN_6dB

#define LTC6603_GAIN_6dB   0x80

Definition at line 103 of file LTC6603.h.

◆ LTC6603_GAIN_MASK

#define LTC6603_GAIN_MASK   0x3F

Definition at line 106 of file LTC6603.h.

◆ LTC6603_GPO_HIGH

#define LTC6603_GPO_HIGH   0x01

Sets the general purpose.

Definition at line 136 of file LTC6603.h.

◆ LTC6603_GPO_LOW

#define LTC6603_GPO_LOW   0x00

Definition at line 137 of file LTC6603.h.

◆ LTC6603_GPO_MASK

#define LTC6603_GPO_MASK   0xFE

Definition at line 138 of file LTC6603.h.

◆ LTC6603_LPF0

#define LTC6603_LPF0   0x00

Definition at line 113 of file LTC6603.h.

◆ LTC6603_LPF1

#define LTC6603_LPF1   0x20

Definition at line 114 of file LTC6603.h.

◆ LTC6603_LPF2

#define LTC6603_LPF2   0x10

Definition at line 115 of file LTC6603.h.

◆ LTC6603_LPF3

#define LTC6603_LPF3   0x30

Definition at line 116 of file LTC6603.h.

◆ LTC6603_LPF_MASK

#define LTC6603_LPF_MASK   0xCF

Definition at line 117 of file LTC6603.h.

◆ LTC6603_NOFUNC0

#define LTC6603_NOFUNC0   0x00

Definition at line 124 of file LTC6603.h.

◆ LTC6603_NOFUNC1

#define LTC6603_NOFUNC1   0x08

Definition at line 125 of file LTC6603.h.

◆ LTC6603_NOFUNC2

#define LTC6603_NOFUNC2   0x04

Definition at line 126 of file LTC6603.h.

◆ LTC6603_NOFUNC3

#define LTC6603_NOFUNC3   0x0C

Definition at line 127 of file LTC6603.h.

◆ LTC6603_NOFUNC_MASK

#define LTC6603_NOFUNC_MASK   0xF3

Definition at line 128 of file LTC6603.h.

◆ LTC6603_ONOFF_MASK

#define LTC6603_ONOFF_MASK   0xFD

Definition at line 135 of file LTC6603.h.

◆ LTC6603_PRUP

#define LTC6603_PRUP   0x00

Turns on LTC6603.

Definition at line 134 of file LTC6603.h.

◆ LTC6603_SHDN

#define LTC6603_SHDN   0x02

Shuts down LTC6603.

Definition at line 133 of file LTC6603.h.