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

X  

ADS7817UB bảng dữ liệu(PDF) 8 Page - Texas Instruments

tên linh kiện ADS7817UB
Giải thích chi tiết về linh kiện  12-Bit Differential Input Micro Power Sampling
Download  21 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
nhà sản xuất  TI [Texas Instruments]
Trang chủ  http://www.ti.com
Logo TI - Texas Instruments

ADS7817UB bảng dữ liệu(HTML) 8 Page - Texas Instruments

Back Button ADS7817UB Datasheet HTML 4Page - Texas Instruments ADS7817UB Datasheet HTML 5Page - Texas Instruments ADS7817UB Datasheet HTML 6Page - Texas Instruments ADS7817UB Datasheet HTML 7Page - Texas Instruments ADS7817UB Datasheet HTML 8Page - Texas Instruments ADS7817UB Datasheet HTML 9Page - Texas Instruments ADS7817UB Datasheet HTML 10Page - Texas Instruments ADS7817UB Datasheet HTML 11Page - Texas Instruments ADS7817UB Datasheet HTML 12Page - Texas Instruments Next Button
Zoom Inzoom in Zoom Outzoom out
 8 / 21 page
background image
ADS7817
8
SBAS066A
THEORY OF OPERATION
The ADS7817 is a classic successive approximation register
(SAR) analog-to-digital (A/D) converter. The architecture is
based on capacitive redistribution which inherently includes
a sample/hold function. The converter is fabricated on a 0.6
µ
CMOS process. The architecture and process allow the
ADS7817 to acquire and convert an analog signal at up to
200,000 conversions per second while consuming very little
power.
The ADS7817 requires an external reference, an external
clock, and a single +5V power source. The external refer-
ence can be any voltage between 100mV and 2.5V. The
value of the reference voltage directly sets the range of the
analog input. The reference input current depends on the
conversion rate of the ADS7817.
The external clock can vary between 10kHz (625Hz through-
put) and 3.2MHz (200kHz throughput). The duty cycle of
the clock is essentially unimportant as long as the minimum
high and low times are at least 150ns. The minimum clock
frequency is set by the leakage on the capacitors internal to
the ADS7817.
The analog input is provided to two input pins: +In and –In.
When a conversion is initiated, the differential input on these
pins is sampled on the internal capacitor array. While a
conversion is in progress, both inputs are disconnected from
any internal function.
The digital result of the conversion is clocked out by the
DCLOCK input and is provided serially, most significant bit
first, on the DOUT pin. The digital data that is provided on the
DOUT pin is for the conversion currently in progress—there
is no pipeline delay. It is possible to continue to clock the
ADS7817 after the conversion is complete and to obtain the
serial data least significant bit first. See the Digital Interface
section for more information.
ANALOG INPUT
The analog input is bipolar and fully differential. There are
two general methods of driving the analog input of the
ADS7817: single-ended or differential (see Figure 1). When
the input is single-ended, the –In input is held at a fixed
voltage. The +In input swings around the same voltage and
the peak-to-peak amplitude is 2 • VREF. The value of VREF
determines the range over which the common voltage may
vary (see Figure 2).
When the input is differential, the amplitude of the input is the
difference between the +In and –In input, or: +In – (–In). A
voltage or signal is common to both of these inputs. The peak-
to-peak amplitude of each input is VREF about this common
voltage. However, since the inputs are 180
° out of phase, the
peak-to-peak amplitude of the difference voltage is 2 • VREF.
The value of VREF also determines the range of the voltage
that may be common to both inputs (see Figure 3).
FIGURE 1. Methods of Driving the ADS7817: Single-
Ended or Differential.
FIGURE 2. Single-Ended Input: Common Voltage Range vs
VREF.
FIGURE 3. Differential Input: Common Voltage Range vs
VREF.
ADS7817
ADS7817
Single-Ended Input
Common
Voltage
2 • V
REF
peak-to-peak
Differential Input
Common
Voltage
V
REF
peak-to-peak
V
REF
peak-to-peak
0.0
0.5
1.0
1.5
2.0
2.5
V
REF (V)
–1
0
1
2
3
4
5
2.8
2.2
–0.3
4.0
V
CC = 5V
Single-Ended Input
0.0
0.5
1.0
1.5
2.0
2.5
V
REF (V)
2.75
V
CC = 5V
1.95
4.0
–0.3
–1
0
1
2
3
4
5
Differential Input


Số phần tương tự - ADS7817UB

nhà sản xuấttên linh kiệnbảng dữ liệuGiải thích chi tiết về linh kiện
logo
Burr-Brown (TI)
ADS7817 BURR-BROWN-ADS7817 Datasheet
172Kb / 15P
   12-Bit Differential Input Micro Power Sampling ANALOG-TO-DIGITAL CONVERTER
ADS7817B BURR-BROWN-ADS7817B Datasheet
172Kb / 15P
   12-Bit Differential Input Micro Power Sampling ANALOG-TO-DIGITAL CONVERTER
ADS7817C BURR-BROWN-ADS7817C Datasheet
172Kb / 15P
   12-Bit Differential Input Micro Power Sampling ANALOG-TO-DIGITAL CONVERTER
More results

Mô tả tương tự - ADS7817UB

nhà sản xuấttên linh kiệnbảng dữ liệuGiải thích chi tiết về linh kiện
logo
Burr-Brown (TI)
ADS7817 BURR-BROWN-ADS7817 Datasheet
172Kb / 15P
   12-Bit Differential Input Micro Power Sampling ANALOG-TO-DIGITAL CONVERTER
logo
National Semiconductor ...
ADC121S625 NSC-ADC121S625 Datasheet
1Mb / 20P
   12-Bit, 50 ksps to 200 ksps, Differential Input, Micro Power Sampling A/D Converter
logo
Texas Instruments
ADC121S625 TI1-ADC121S625_15 Datasheet
1Mb / 31P
[Old version datasheet]   12-Bit, 50 ksps to 200 ksps, Differential Input, Micro Power Sampling A/D Converter
ADS7816EB TI1-ADS7816EB Datasheet
984Kb / 24P
[Old version datasheet]   12-Bit High Speed Micro Power Sampling
ADS7816PG4 TI-ADS7816PG4 Datasheet
931Kb / 23P
[Old version datasheet]   12-Bit High Speed Micro Power Sampling
ADC121S625 TI1-ADC121S625_14 Datasheet
1Mb / 31P
[Old version datasheet]   ADC121S625 12-Bit, 50 ksps to 200 ksps, Differential Input, Micro Power Sampling A/D Converter
logo
Analog Devices
AD7356 AD-AD7356_15 Datasheet
636Kb / 21P
   Differential Input, Dual, Simultaneous Sampling, 5 MSPS, 12-Bit, SAR ADC
REV. A
AD7352 AD-AD7352 Datasheet
518Kb / 20P
   Differential Input, Dual, Simultaneous Sampling, 3 MSPS, 12-Bit, SAR ADC
REV. 0
AD7356 AD-AD7356_08 Datasheet
531Kb / 20P
   Differential Input, Dual, Simultaneous Sampling, 5 MSPS, 12-Bit, SAR ADC
REV. 0
AD7352 AD-AD7352_15 Datasheet
623Kb / 21P
   Differential Input, Dual, Simultaneous Sampling, 3 MSPS, 12-Bit, SAR ADC
REV. A
More results


Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21


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