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參數(shù)資料
| 型號： | LTC1090MJ |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | ADC |
| 英文描述： | Single Chip 10-Bit Data Acquisition System |
| 中文描述： | 8-CH 10-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, CDIP20 |
| 封裝： | HERMETIC SEALED, CERDIP-20 |
| 文件頁數(shù)： | 24/28頁 |
| 文件大?。?/td> | 344K |
| 代理商： | LTC1090MJ |
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24
LTC1090
1090fc
U
TYPICAL APPLICATIO
Sneak-A-Bit Code for the LTC1090 Using the MC68HC05C4
MNEMONIC
DESCRIPTION
READ–/+: LDA
#$3F
TRANSFER Read LTC1090 routine
$60
Load MSBs from LTC1090 into ACC
$71
Store MSBs in $71
$61
Load LSBs from LTC1090 into ACC
$72
Store LSBs in $72
Return
#$7F
Load D
IN
word for LTC1090 into ACC
TRANSFER Read LTC1090 routine
$60
Load MSBs from LTC1090 into ACC
$73
Store MSBs in $73
$61
Load LSBs from LTC1090 into ACC
$74
Store LSBs in $74
Return
TRANSFER:BCLR 0, $02
CS goes low
STA
$0C
Load D
IN
into SPI. Start transfer
LOOP 1:
TST
$0B
Test status of SPlF
BPL
LOOP 1
Loop to previous instruction if not done
LDA
$0C
Load contents of SPI data reg into ACC
STA
$0C
Start next cycle
STA
$60
Store MSBs in $60
LOOP 2:
TST
$0B
Test status of SPlF
BPL
LOOP 2
Loop to previous instruction if not done
BSET 0, $02
CS goes high
LDA
$0C
Load contents of SPI data reg into ACC
STA
$61
Store LSBs in $61
RTS
Return
CHK SIGN: LDA
$73
Load MSBs of +/–read into ACC
ORA
$74
Or ACC (MSBs) with LSBs of +/–read
BEQ
MINUS
If result is 0 goto minus
CLC
Clear carry
ROR
$73
Rotate right $73 through carry
ROR
$74
Rotate right $74 through carry
LDA
$73
Load MSBs of +/–read into ACC
STA
$77
Store MSBs in RAM location $77
LDA
$74
Load LSBs of +/–read into ACC
STA
$87
Store LSBs in RAM location $87
BRA
END
Goto end of routine
MINUS:
CLC
Clear carry
ROR
$71
Shift MSBs of –/+ read right
ROR
$72
Shift LSBs of –/+ read right
COM $71
1’s complement of MSBs
COM $72
1’s complement of LSBs
LDA
$72
Load LSBs into ACC
ADD
#$01
Add 1 to LSBs
STA
$72
Store ACC in $72
CLRA
Clear ACC
ADC
$71
Add with carry to MSBs. Result in ACC
STA
$71
Store ACC in $71
STA
$77
Store MSBs in RAM location $77
LDA
$72
Load LSBs in ACC
STA
$87
Store LSBs in RAM location $87
END:
RTS
Return
Load D
IN
word for LTC1090 into ACC
JSR
LDA
STA
LDA
STA
RTS
READ+/–: LDA
JSR
LDA
STA
LDA
STA
RTS
MNEMONIC
DESCRIPTION
LDA
STA
LDA
STA
BSET
JSR
#$50
$0A
#$FF
$06
0, $02
READ–/+
Configuration data for SPCR
Load configuration data into $0A
Configuration data for port C DDR
Load configuration data into port C DDR
Make sure CS is high
Dummy read configures LTC1090 for next
read
Read CH6 with respect to CH7
Read CH7 with respect to CH6
Determines which reading has valid data,
converts to 2’s complement and stores in
RAM
JSR
JSR
JSR
READ+/–
READ–/+
CHK SIGN
SNEAK-A-BIT
Sneak-A-Bit Code for the LTC1090 Using the MC68HC05C4
LTC1090 TA05
1ST CONVERSION
1ST CONVERSION
1024 STEPS
5V
–5V
5V
–5V
0V
0V
0V
2ND CONVERSION
1024 STEPS
SOFTWARE
2047 STEPS
( + ) CH6
( – ) CH7
V
IN
V
IN
2ND CONVERSION
SNEAK-A-BIT Code
( – ) CH6
( + ) CH7
V
IN
D
OUT
from LTC1090 in MC68HC05C4 RAM
D
IN
words for LTC1090
Location $77
Sign
LSB
B2
B1
B0
B10
B9
B8
filled with 0s
B7
B6
B5
B4
B3
Location $87
(ODD/SIGN)
MUX Addr.
Word
Length
UNI
MSBF
D
IN
1
0
0
1
1
1
1
1
1
D
IN
2
0
1
1
1
1
1
1
1
D
IN
3
0
0
1
1
1
1
1
1
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相關代理商/技術參數(shù) |
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| LTC1090MJ/883 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Single-Ended Data Acquisition System |
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| LTC1091ACN8 | 功能描述:IC DATA ACQ SYS 10BIT 2CH 8-DIP RoHS:否 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - ADCs/DAC - 專用型 系列:- 產品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:50 系列:- 類型:數(shù)據(jù)采集系統(tǒng)（DAS） 分辨率（位）:16 b 采樣率（每秒）:21.94k 數(shù)據(jù)接口:MICROWIRE?，QSPI?，串行，SPI? 電壓電源:模擬和數(shù)字 電源電壓:1.8 V ~ 3.6 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:40-WFQFN 裸露焊盤 供應商設備封裝:40-TQFN-EP（6x6） 包裝:托盤 |
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