TYPICAL APPLICATIONS U BCLR PORTD,Y %00100000 This set" />
參數(shù)資料
型號: LTC1417AIGN#TR
廠商: Linear Technology
文件頁數(shù): 24/32頁
文件大?。?/td> 0K
描述: IC ADC 14BIT 400KSPS SMPL 16SSOP
標準包裝: 2,500
位數(shù): 14
采樣率(每秒): 400k
數(shù)據(jù)接口: MICROWIRE?,串行,SPI?
轉(zhuǎn)換器數(shù)目: 1
功率耗散(最大): 27.5mW Unipolar; 44mW Bipolar
電壓電源: 雙 ±
工作溫度: -40°C ~ 85°C
安裝類型: 表面貼裝
封裝/外殼: 16-SSOP(0.154",3.90mm 寬)
供應(yīng)商設(shè)備封裝: 16-SSOP
包裝: 帶卷 (TR)
輸入數(shù)目和類型: 2 個單端,單極;2 個單端,雙極;1 個差分,單極;1 個差分,雙極
30
LTC1417
sn1417 1417fas
TYPICAL APPLICATIONS
U
BCLR
PORTD,Y %00100000
This sets the SS* output bit to a logic
*
low, selecting the LTC1417
TRFLP1 LDAA
#$0
Load accumulator A with a null byte for SPI transfer
STAA
SPDR
This writes the byte into the SPI data register and
*
starts the transfer
WAIT1
LDAA
SPSR
This loop waits for the SPI to complete a serial
*
transfer/exchange by reading the SPI Status Register
BPL
WAIT1
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.
LDAA
SPDR
Load accumulator A with the current byte of LTC1417 data
*
that was just received
STAA
0,X
Transfer the LTC1417’s data to memory
INX
Increment the pointer
CPX
#DIN2+1Has the last byte been transferred/exchanged?
BNE
TRFLP1 If the last byte has not been reached, then proceed to
*
the next byte for transfer/exchage
BSET
PORTD,Y %00100000
This sets the SS* output bit to a logic
*
high, de-selecting the LTC1417
LDD
DIN1
Load the contents of DIN1 and DIN2 into the double
*
accumulator D
LSRD
Two logical shifts to right justify the 14-bit
*
conversion results
STD
DIN1
Return right justified data to memory
PULA
Restore the A register
PULY
Restore the Y register
PULX
Restore the X register
RTS
CONVST
BUSY
SCLK
DOUT
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
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