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AD7151 PDF даташит

Спецификация AD7151 изготовлена ​​​​«Analog Devices» и имеет функцию, называемую «Capacitance Converter».

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Номер произв AD7151
Описание Capacitance Converter
Производители Analog Devices
логотип Analog Devices логотип 

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AD7151 Даташит, Описание, Даташиты
Ultra-Low Power, 1-Channel, Capacitance
Converter for Proximity Sensing
AD7151
FEATURES
Ultra-low power
2.7 V to 3.6 V, 70 μA
Response time: 10 ms
Adaptive environmental compensation
1 capacitance input channel
Sensor capacitance (CSENS) 0 pF up to 13 pF
Sensitivity to 1 fF
EMC tested
2 modes of operation
Standalone with fixed settings
Interfaced to a microcontroller for user-defined settings
Proximity detection output flag
2-wire serial interface (I2C compatible)
Operating temperature
−40°C to +85°C
10-lead MSOP package
APPLICATIONS
Proximity sensing
Contactless switching
Position detection
Level detection
GENERAL DESCRIPTION
The AD7151 delivers a complete signal processing solution for
capacitive proximity sensors, featuring an ultra-low power
converter with fast response time. The AD7150 is a 2-channel
alternative to the AD7151.
The AD7151 uses Analog Devices, Inc., capacitance-to-digital
converter (CDC) technology, which combines features
important for interfacing to real sensors, such as high input
sensitivity and high tolerance of both input parasitic ground
capacitance and leakage current.
The integrated adaptive threshold algorithm compensates for
any variations in the sensor capacitance due to environmental
factors like humidity and temperature or due to changes in the
dielectric material over time.
By default, the AD7151 operates in standalone mode using the
fixed power-up settings and indicates detection on a digital
output. Alternatively, the AD7151 can be interfaced to a
microcontroller via the serial interface, the internal registers can
be programmed with user-defined settings, and the data and
status can be read from the part.
The AD7151 operates with a 2.7 V to 3.6 V power supply. It is
specified over the temperature range of −40°C to +85°C.
CSENS
FUNCTIONAL BLOCK DIAGRAM
VDD
CIN
Σ-Δ CDC
DIGITAL
FILTER
AD7151
SERIAL
INTERFACE
EXC
EXCITATION
THRESHOLD
SCL
SDA
OUT
GND
Figure 1.
Rev. 0
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other
rights of third parties that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
www.analog.com
Fax: 781.461.3113
©2007 Analog Devices, Inc. All rights reserved.









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AD7151 Даташит, Описание, Даташиты
AD7151* Product Page Quick Links
Last Content Update: 11/01/2016
Comparable Parts
View a parametric search of comparable parts
Documentation
Application Notes
• AN-1048: AD7150 On-Chip Noise Filter
Data Sheet
• AD7151: Ultra-Low Power, 1-Channel, Capacitance
Converter for Proximity Sensing Data Sheet
Software and Systems Requirements
• AD7150 IIO Capacitance to Digital Converter Linux Driver
Reference Materials
Informational
• Wireless Sensor Network (WSN) Demo System
Technical Articles
• MS-2210: Designing Power Supplies for High Speed ADC
Design Resources
• AD7151 Material Declaration
• PCN-PDN Information
• Quality And Reliability
• Symbols and Footprints
Discussions
View all AD7151 EngineerZone Discussions
Sample and Buy
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Technical Support
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* This page was dynamically generated by Analog Devices, Inc. and inserted into this data sheet. Note: Dynamic changes to
the content on this page does not constitute a change to the revision number of the product data sheet. This content may be
frequently modified.









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AD7151 Даташит, Описание, Даташиты
AD7151
TABLE OF CONTENTS
Features .............................................................................................. 1
Applications....................................................................................... 1
General Description ......................................................................... 1
Functional Block Diagram .............................................................. 1
Revision History ............................................................................... 2
Specifications..................................................................................... 3
Timing Specifications .................................................................. 4
Absolute Maximum Ratings............................................................ 5
ESD Caution.................................................................................. 5
Pin Configuration and Function Descriptions............................. 6
Typical Performance Characteristics ............................................. 7
Architecture and Main Features ................................................... 10
Capacitance-to-Digital Converter............................................ 10
CAPDAC ..................................................................................... 10
Comparator and Threshold Modes.......................................... 11
Adaptive Threshold.................................................................... 11
Data Average ............................................................................... 11
Sensitivity..................................................................................... 12
Hysteresis..................................................................................... 12
Timeout........................................................................................ 12
AutoCAPDAC Adjustment ....................................................... 13
Power-Down Timer ................................................................... 13
Power Supply Monitor ............................................................... 13
Register Descriptions ..................................................................... 14
Status Register ............................................................................. 15
Data Register ............................................................................... 16
Average Register ......................................................................... 16
REVISION HISTORY
11/07—Revision 0: Initial Version
Fixed Threshold Register........................................................... 16
Sensitivity Register ..................................................................... 16
Timeout Register ........................................................................ 17
Setup Register ............................................................................. 18
Configuration Register .............................................................. 19
Power-Down Timer Register .................................................... 20
CAPDAC Register...................................................................... 20
Serial Number Register.............................................................. 20
Chip ID Register......................................................................... 20
Serial Interface ................................................................................ 21
Read Operation........................................................................... 21
Write Operation.......................................................................... 21
AD7151 Reset ............................................................................. 22
General Call ................................................................................ 22
Hardware Design Considerations ................................................ 23
Overview ..................................................................................... 23
Parasitic Capacitance to Ground.............................................. 23
Parasitic Resistance to Ground................................................. 23
Parasitic Parallel Resistance ...................................................... 23
Parasitic Serial Resistance ......................................................... 24
Input Overvoltage Protection ................................................... 24
Input EMC Protection ............................................................... 24
Power Supply Decoupling and Filtering.................................. 24
Application Examples ................................................................ 25
Outline Dimensions ....................................................................... 26
Ordering Guide .......................................................................... 26
Rev. 0 | Page 2 of 28










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