参数资料
| 型号： | LTC1090ACN |
| 厂商： | Linear Technology |
| 文件页数： | 9/28页 |
| 文件大小： | 0K |
| 描述： | IC DATA ACQUIS SYS 10BIT 20-DIP |
| 标准包装： | 18 |
| 类型： | 数据采集系统（DAS），ADC |
| 分辨率（位）： | 10 b |
| 采样率（每秒）： | 30k |
| 数据接口： | 串行 |
| 电压电源： | 单/双电源 |
| 电源电压： | ±5V，5V，10V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 通孔 |
| 封装/外壳： | 20-DIP（0.300"，7.62mm） |
| 供应商设备封装： | 20-PDIP |
| 包装： | 管件 |
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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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相关代理商/技术参数 |
参数描述 |
|---|---|
| LTC1090ACN#PBF | 功能描述:IC DATA ACQUIS SYS 10BIT 20-DIP RoHS:是 类别:集成电路 (IC) >> 数据采集 - ADCs/DAC - 专用型 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:50 系列:- 类型:数据采集系统（DAS） 分辨率（位）:16 b 采样率（每秒）:21.94k 数据接口:MICROWIRE?，QSPI?，串行，SPI? 电压电源:模拟和数字 电源电压:1.8 V ~ 3.6 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:40-WFQFN 裸露焊盘 供应商设备封装:40-TQFN-EP（6x6） 包装:托盘 |
| LTC1090AM | 制造商:LINER 制造商全称:Linear Technology 功能描述:Single Chip 10-Bit Data Acquisition System |
| LTC1090AMJ | 制造商:LINER 制造商全称:Linear Technology 功能描述:Single Chip 10-Bit Data Acquisition System |
| LTC1090C | 制造商:LINER 制造商全称:Linear Technology 功能描述:Single Chip 10-Bit Data Acquisition System |
| LTC1090CJ | 制造商:LINER 制造商全称:Linear Technology 功能描述:Single Chip 10-Bit Data Acquisition System |
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