công cụ tìm kiếm bảng dữ liệu linh kiện điện tử
  Vietnamese  ▼
ALLDATASHEET.VN

X  

MC145053P bảng dữ liệu(PDF) 11 Page - LANSDALE Semiconductor Inc.

tên linh kiện MC145053P
Giải thích chi tiết về linh kiện  10-Bit A/D Converter With Serial Interface
Download  15 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
nhà sản xuất  LANSDALE [LANSDALE Semiconductor Inc.]
Trang chủ  http://www.lansdale.com
Logo LANSDALE - LANSDALE Semiconductor Inc.

MC145053P bảng dữ liệu(HTML) 11 Page - LANSDALE Semiconductor Inc.

Back Button MC145053P Datasheet HTML 7Page - LANSDALE Semiconductor Inc. MC145053P Datasheet HTML 8Page - LANSDALE Semiconductor Inc. MC145053P Datasheet HTML 9Page - LANSDALE Semiconductor Inc. MC145053P Datasheet HTML 10Page - LANSDALE Semiconductor Inc. MC145053P Datasheet HTML 11Page - LANSDALE Semiconductor Inc. MC145053P Datasheet HTML 12Page - LANSDALE Semiconductor Inc. MC145053P Datasheet HTML 13Page - LANSDALE Semiconductor Inc. MC145053P Datasheet HTML 14Page - LANSDALE Semiconductor Inc. MC145053P Datasheet HTML 15Page - LANSDALE Semiconductor Inc.  
Zoom Inzoom in Zoom Outzoom out
 11 / 15 page
background image
www.lansdale.com
Page 11 of 15
Issue A
ML145053
LANSDALE Semiconductor, Inc.
DESCRIPTION
This example application of the ML145053 ADC interfaces
four analog signals to a microprocessor.
Figure 15 illustrates how the ML145053 is used as a cost
effective means to simplify this type of circuit design. Utilizing
one ADC, four analog inputs are interfaced to a CMOS or
NMOS microprocessor with a serial peripheral interface (SPI)
port. Processors with National Semiconductor's MICROWIRE
serial port may also be used. Full duplex operation optimizes
throughput for this system.
DIGITAL DESIGN CONSIDERATIONS
Motorola's MC68HC05C4 CMOS MCU may be chosen to
reduce power supply size and cost. The NMOS MCUs may be
used if power consumption is not critical. A VDD or VSS 0.1
µF bypass capacitor should be closely mounted to the ADC.
The ML145053 has the end-of-conversion (EOC) signal at
output pin 1 to define when data is ready.
ANALOG DESIGN CONSIDERATIONS
Analog signal sources with output impedances of less than
1 kΩ may be directly interfaced to the ADC, eliminating the
need for buffer amplifiers. Separate lines connect the Vref and
VAG pins on the ADC with the controllers to provide isolation
from system noise.
Although not indicated in Figure 15, the Vref and sensor out-
put lines may need to be shielded, depending on their length
and electrical environment. This should be verified during pro-
totyping with an oscilloscope. If shielding is required, a twist-
ed pair or foil-shielded wire (not coax) is appropriate for this
low frequency application. One wire of the pair or the shield
must be VAG.
A reference circuit voltage of 5 volts is used for the applica-
tion shown in Figure 15. However, the reference circuitry may
be simplified by tying VAG to system ground and Vref to the
system's positive supply. (See Figure 16.)
A bypass capacitor of approximately 0.22 µF across theVref
and VAG pins is recommended. These pins are adjacent on the
ADC package which facilitates mounting the capacitor very
close to the ADC.
SOFTWARE CONSIDERATIONS
The software flow for acquisition is straight forward. The
four analog inputs, AN0 through AN3, are scanned by reading
the analog value of the previously addressed channel into the
MCU and sending the address of the next channel to be read to
the ADC, simultaneously.
The designer utilizing the ML145053 has the end-of-con-
version signal (at pin 1) to define the conversion interval. EOC
may be used to generate an interrupt, which is serviced by
reading the serial data from the ADC. The software flow
should then process and format the data.
When this ADC is used with a 16-bit (2-byte) transfer, there
are two types of offsets involved. In the first type of offset, the
channel information sent to the ADCs is offset by 12 bits. That
is, in the 16-bit stream, only the first 4 bits (4 MSBs) contain
the channel information. The balance of the bits are don't
cares. This results in 3 don't-care nibbles, as shown in Table 2.
The second type of offset is in the conversion result returned
from the ADC; this is offset by 6 bits. In the 16-bitstream, the
first 10 bits (10 MSBs) contain the conversion result. The last
6 bits are zeroes. The hexadecimal result is shown in the first
column of Table 3. The second column shows the result after
the offset is removed by a micro-processor routine. If the 16-
bit format is used, the ADC can transfer one continuous 16-bit
stream or two intermittent 8-bitstreams.
Legacy Applications Information


Số phần tương tự - MC145053P

nhà sản xuấttên linh kiệnbảng dữ liệuGiải thích chi tiết về linh kiện
logo
LANSDALE Semiconductor ...
MC145053P LANSDALE-MC145053P Datasheet
805Kb / 15P
   10-Bit A/D Converter With Serial Interface CMOS
logo
Motorola, Inc
MC145053P MOTOROLA-MC145053P Datasheet
169Kb / 15P
   10-Bit A/D Concerter with Serial Interface
More results

Mô tả tương tự - MC145053P

nhà sản xuấttên linh kiệnbảng dữ liệuGiải thích chi tiết về linh kiện
logo
LANSDALE Semiconductor ...
ML145050 LANSDALE-ML145050_08 Datasheet
209Kb / 15P
   10-Bit A/D Converter with Serial Interface
logo
Motorola, Inc
MC145050 MOTOROLA-MC145050 Datasheet
184Kb / 15P
   10-Bit A/D Converter with Serial Interface
logo
LANSDALE Semiconductor ...
ML145053 LANSDALE-ML145053 Datasheet
805Kb / 15P
   10-Bit A/D Converter With Serial Interface CMOS
ML145050 LANSDALE-ML145050 Datasheet
6Mb / 15P
   10-Bit A/D Converter with Serial Interface - CMOS
logo
Microchip Technology
MCP3001 MICROCHIP-MCP3001_07 Datasheet
453Kb / 28P
   2.7V 10 BIT A/D CONVERTER WITH SPI SERIAL INTERFACE
2007
MCP3001 MICROCHIP-MCP3001 Datasheet
597Kb / 28P
   2.7V 10 BIT A/D CONVERTER WITH SPI SERIAL INTERFACE
2001
logo
Motorola, Inc
MC145053 MOTOROLA-MC145053 Datasheet
169Kb / 15P
   10-Bit A/D Concerter with Serial Interface
logo
Texas Instruments
UCC5950D TI-UCC5950D Datasheet
171Kb / 5P
[Old version datasheet]   10-Bit Serial D/A Converter
UCC5950 TI-UCC5950 Datasheet
206Kb / 5P
[Old version datasheet]   10-Bit Serial D/A Converter
logo
Microchip Technology
MCP3002 MICROCHIP-MCP3002_08 Datasheet
585Kb / 34P
   2.7V Dual Channel 10-Bit A/D Converter with SPI Serial Interface
2008
More results


Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15


bảng dữ liệu tải về

Go To PDF Page


Link URL




Chính sách bảo mật
ALLDATASHEET.VN
Cho đến nay ALLDATASHEET có giúp ích cho doanh nghiệp của bạn hay không?  [ DONATE ] 

Alldatasheet là   |   Quảng cáo   |   Liên lạc với chúng tôi   |   Chính sách bảo mật   |   Trao đổi link   |   Tìm kiếm theo nhà sản xuất
All Rights Reserved©Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  |   English : Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp
Russian : Alldatasheetru.com  |   Korean : Alldatasheet.co.kr  |   Spanish : Alldatasheet.es  |   French : Alldatasheet.fr  |   Italian : Alldatasheetit.com
Portuguese : Alldatasheetpt.com  |   Polish : Alldatasheet.pl  |   Vietnamese : Alldatasheet.vn
Indian : Alldatasheet.in  |   Mexican : Alldatasheet.com.mx  |   British : Alldatasheet.co.uk  |   New Zealand : Alldatasheet.co.nz
Family Site : ic2ic.com  |   icmetro.com