參數(shù)資料
型號(hào)： LTC1090ACN#PBF
廠商： Linear Technology
文件頁(yè)數(shù)： 9/28頁(yè)
文件大?。?/td> 0K
描述： IC DATA ACQUIS SYS 10BIT 20-DIP
標(biāo)準(zhǔn)包裝： 18
類(lèi)型： 數(shù)據(jù)采集系統(tǒng)（DAS），ADC
分辨率（位）： 10 b
采樣率（每秒）： 30k
數(shù)據(jù)接口： 串行
電壓電源： 單/雙電源
電源電壓： ±5V，5V，10V
工作溫度： -40°C ~ 85°C
安裝類(lèi)型： 通孔
封裝/外殼： 20-DIP（0.300"，7.62mm）
供應(yīng)商設(shè)備封裝： 20-PDIP
包裝： 管件
產(chǎn)品目錄頁(yè)面： 1345 (CN2011-ZH PDF)
17
LTC1090
1090fc
Parallel Port Microprocessors
When interfacing the LTC1090 to an MPU which has a
parallel port, the serial signals are created on the port with
software. Three MPU port lines are programmed to create
the CS, SCLK and DIN signals for the LTC1090. A fourth
port line reads the DOUT line. An example is made of the
Intel 8051/8052/80C252 family.
Intel 8051
To interface to the 8051, the LTC1090 is programmed for
MSB first format and 10-bit word length. The 8051 gener-
ates CS, SCLK and DIN on three port lines and reads DOUT
on the fourth.
Hardware and Software Interface to Intel 8051 Processor
8051 Code
MNEMONIC
DESCRIPTION
MOV PI,#02H
Initialize port 1 (bit 1 is made
an input)
CLR P1.3
SCLK goes low
SETB P1.4
CS goes high
CONTINUE: MOV A,#0DH
DIN word for the LTC1090 is
placed in ACC.
CLR P1.4
CS goes low
MOV R4,#08
Load counter
NOP
Delay for deglitcher
LOOP:
MOV C, P1.1
Read data bit into carry
RLC A
Rotate data bit into ACC
MOV P1.2, C
Output DIN bit to LTC1090
SETB P1.3
SCLK goes high
CLR P1.3
SCLK goes low
DJNZ R4, LOOP
Next bit
MOV R2, A
Store MSBs in R2
MOV C, P1.1
Read data bit into carry
CLR A
CIear ACC
RLC A
Rotate data bit into ACC
SETB P1.3
SCLK goes high
CLR P1.3
SCLK goes low
MOV C, P1.1
Read data bit into carry
RRC A
Rotate right into ACC
RRC A
Rotate right into ACC
MOV R3, A
Store LSBs in R3
SETB P1.3
SCLK goes high
CLR P1.3
SCLK goes low
SETB P1.4
CS goes high
MOV R5,#07H
Load counter
DELAY:
DJNZ R5, DELAY
Delay for LTC1090 to perform
conversion
AJMP CONTINUE
Repeat program
APPLICATIO S I FOR ATIO
WU
UU
Figure 5. Several LTC1090’s Sharing One 3-Wire Serial Interface
LTC1090
ANALOG
INPUTS
DOUT
DOUT from LTC1090 stored in 8051 RAM
DIN
SCLK
ACLK
CS
P1.1
P1.2
P1.3
ALE
P1.4
8051
B9
R2
R3
*B9 is MSB in unipolar or sign bit in bipolar
MSB*
LSB
B8 B7 B6 B5 B4 B3 B2
B1 B0
000000
LTC1090 AI14
LTC1090
3
21 0
CS
8 CHANNELS
OUTPUT PORT
SERIAL DATA
3-WIRE SERIAL
INTERFACE TO OTHER
PERIPHERALS OR LTC1090s
MPU
LTC1090
3
CS
8 CHANNELS
LTC1090
3
CS
8 CHANNELS
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LTC1090AM 制造商:LINER 制造商全稱(chēng):Linear Technology 功能描述:Single Chip 10-Bit Data Acquisition System
LTC1090AMJ 制造商:LINER 制造商全稱(chēng):Linear Technology 功能描述:Single Chip 10-Bit Data Acquisition System
LTC1090C 制造商:LINER 制造商全稱(chēng):Linear Technology 功能描述:Single Chip 10-Bit Data Acquisition System
LTC1090CJ 制造商:LINER 制造商全稱(chēng):Linear Technology 功能描述:Single Chip 10-Bit Data Acquisition System
LTC1090CN 功能描述:IC DATA ACQUIS SYS 10BIT 20-DIP RoHS:否 類(lèi)別:集成電路 (IC) >> 數(shù)據(jù)采集 - ADCs/DAC - 專(zhuān)用型 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:50 系列:- 類(lèi)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(lèi)型:表面貼裝 封裝/外殼:40-WFQFN 裸露焊盤(pán) 供應(yīng)商設(shè)備封裝:40-TQFN-EP（6x6） 包裝:托盤(pán)
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