參數(shù)資料
型號: LTC1417ACGN
廠商: LINEAR TECHNOLOGY CORP
元件分類: ADC
英文描述: Dual, Low Voltage, LinCMOS(TM) Differential Comparator 8-PDIP -40 to 85
中文描述: 1-CH 14-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDSO16
封裝: 0.150 INCH, PLASTIC, SSOP-16
文件頁數(shù): 30/32頁
文件大小: 394K
代理商: LTC1417ACGN
30
LTC1417
TYPICAL APPLICATIO
N
S
BCLR
PORTD,Y %00100000
This sets the SS* output bit to a logic
low, selecting the LTC1417
Load accumulator A with a null byte for SPI transfer
This writes the byte into the SPI data register and
starts the transfer
This loop waits for the SPI to complete a serial
transfer/exchange by reading the SPI Status Register
The SPIF (SPI transfer complete flag) bit is the SPSR’s
MSB and is set to one at the end of an SPI transfer. The
branch will occur while SPIF is a zero.
Load accumulator A with the current byte of LTC1417 data
that was just received
Transfer the LTC1417’s data to memory
Increment the pointer
#DIN2+1Has the last byte been transferred/exchanged
TRFLP1 If the last byte has not been reached, then proceed to
the next byte for transfer/exchage
PORTD,Y %00100000
This sets the SS* output bit to a logic
high, de-selecting the LTC1417
DIN1
Load the contents of DIN1 and DIN2 into the double
accumulator D
*
TRFLP1 LDAA
#$0
SPDR
STAA
*
WAIT1
*
LDAA
SPSR
BPL
WAIT1
*
*
LDAA
SPDR
*
STAA
INX
CPX
BNE
0,X
*
BSET
*
LDD
*
LSRD
LSRD
Two logical shifts to right justify the 14-bit
conversion results
Return right justified data to memory
Restore the A register
Restore the Y register
Restore the X register
*
STD
PULA
PULY
PULX
RTS
DIN1
CONVST
BUSY
SCLK
D
OUT
RD
MUX
DATA
CH5
CH3 DATA
CH2 DATA
CH1 DATA
CH0 DATA
CH0
CH1
CH2
CH3
1417 F24
Figure 24. Using the Sample Program In Listing 2, the LTC1417, Combined with the DG408 8-Channel MUX,
Has No Latency Between the Selected Input Voltage and Its Conversion Data as Shown In the Timing Relationship Above
相關(guān)PDF資料
PDF描述
LTC1417 Low Power 14-Bit, 400ksps Sampling ADC Converter with Serial I/O
LTC1417AIGN Low Power 14-Bit, 400ksps Sampling ADC Converter with Serial I/O
LTC1417C Low Power 14-Bit, 400ksps Sampling ADC Converter with Serial I/O
LTC1417I Low Power 14-Bit, 400ksps Sampling ADC Converter with Serial I/O
LTC1417CGN Low Power 14-Bit, 400ksps Sampling ADC Converter with Serial I/O
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