參數(shù)資料
型號(hào): LTC1290BIN
廠商: Linear Technology
文件頁數(shù): 8/32頁
文件大?。?/td> 0K
描述: IC DATA ACQ SYS 12BIT 20-DIP
標(biāo)準(zhǔn)包裝: 18
類型: 數(shù)據(jù)采集系統(tǒng)(DAS),ADC
分辨率(位): 12 b
采樣率(每秒): 50k
數(shù)據(jù)接口: 串行,并聯(lián)
電壓電源: 雙 ±
電源電壓: ±5 V,5 V
工作溫度: -40°C ~ 85°C
安裝類型: 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
16
LTC1290
1290fe
U
S
A
O
PPLICATI
WU
U
I FOR ATIO
MICROWIRE and MICROWIRE PLUS are trademarks of National Semiconductor Corp
LTC1290 AI08
SCLK
DOUT
LTC1290
CS
ANALOG
INPUTS
GO
SK
SI
COP402
DIN
SO
B6
B5
B4
B7
FIRST 4 BITS
SECOND 4 BITS
B10
B9
B8
B11
DOUT from LTC1290 Stored in COP402 RAM
MSB
LOCATION $13
LOCATION $14
B2
B1
B0
B3
THIRD 4 BITS
LSB
LOCATION $15
B11 IS MSB IN UNIPOLAR OR SIGN BIT IN BIPOLAR
National MICROWIRE (COP402)
The COP402 transfers data MSB first and in 4-bit incre-
ments (nibbles). This is easily accommodated by setting
the LTC1290 to MSB-first format and 12-bit word length.
The data output word is then received by the COP402 in
three 4-bit blocks.
COP402 Code
MNEMONIC
COMMENTS
CLRA
Must be First Instruction
LBI
1,0
BR = 1BD = 0 Initialize B Reg.
STII 8
First DIN Nibble in $10
STII E
Second DIN Nibble in $11
STII 0
Null Data in $12, B = $13
LEI
C
Set EN to (1100) BIN
LOOP
SC
Carry Set
LDD 1,0
Load First DIN Nibble In ACC
OGI
0
Go (CS) Cleared
XAS
ACC to Shift Reg. Begin Shift
LDD 1,1
Load Next DIN Nibble in ACC
NOP
Timing
XAS
Next Nibble, Shift Continues
XIS
0
First Nibble DOUT to $13
LDD 1,2
Put Null Data in ACC
XAS
Shift Continues, DOUT to ACC
XIS
0
Next Nibble DOUT to $14
RC
Clear Carry
CLRA
Clear ACC
XAS
Third Nibble DOUT to ACC
OGI
1
Go (CS) Set
XIS
0
Third Nibble DOUT to $15
LBI
1,3
Set B Reg. For Next Loop
Motorola SPI (MC68HC05C4)
The MC68HC05C4 transfers data MSB first and in 8-bit
increments. Programming the LTC1290 for MSB-first
format and 16-bit word length allows the 12-bit data
output to be received by the MPU as two 8-bit bytes with
the final four unused bits filled with zeros by the LTC1290.
Hardware and Software Interface to COP402 Processor
Table 2. Microprocessors with Hardware Serial Interfaces
Compatible with the LTC1290**
PART NUMBER
TYPE OF INTERFACE
Motorola
MC6805S2, S3
SPI
MC68HC11
SPI
MC68HC05
SPI
RCA
CDP68HC05
SPI
Hitachi
HD6305
SCI Synchronous
HD6301
SCI Synchronous
HD63701
SCI Synchronous
HD6303
SCI Synchronous
HD64180
SCI Synchronous
National Semiconductor
COP400 Family
MICROWIRE
TM
COP800 Family
MICROWIRE/PLUS
TM
NS8050U
MICROWIRE/PLUS
HPC16000 Family
MICROWIRE/PLUS
Texas Instruments
TMS7002
Serial Port
TMS7042
Serial Port
TMS70C02
Serial Port
TMS70C42
Serial Port
TMS32011*
Serial Port
TMS32020
Serial Port
TMS370C050
SPI
*Requires external hardware
** Contact factory for interface information for processors not on this list
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