AD7151

更新时间： 2024-11-04 04:04:15

品牌	Logo	应用领域
亚德诺 - ADI		转换器
页数	文件大小	规格书
28页	536K
描述
Ultra-Low Power, 1-Channel, Capacitance Converter for Proximity Sensing

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AD7151 数据手册

Ultra-Low Power, 1-Channel, Capacitance

Converter for Proximity Sensing

AD7151

FEATURES

GENERAL DESCRIPTION

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 (C_SENS) 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

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.

−40°C to +85°C

10-lead MSOP package

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.

APPLICATIONS

Proximity sensing

Contactless switching

Position detection

Level detection

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.

FUNCTIONAL BLOCK DIAGRAM

VDD

AD7151

CIN

SCL

SDA

DIGITAL

FILTER

SERIAL

INTERFACE

Σ-Δ CDC

SENS

EXCITATION

EXC

THRESHOLD

GND

OUT

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.

Trademarks and registeredtrademarks arethe property of their respective owners.

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.

Tel: 781.329.4700

Fax: 781.461.3113

www.analog.com

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与AD7151相关器件

型号	品牌	获取价格	描述	数据表
AD7151BRMZ	ADI	获取价格	Ultra-Low Power, 1-Channel, Capacitance Converter for Proximity Sensing
AD7151BRMZ-REEL	ADI	获取价格	Ultra-Low Power, 1-Channel, Capacitance Converter for Proximity Sensing
AD7152	ADI	获取价格	12-Bit Capacitance-to-Digital Converter
AD7152BRMZ	ADI	获取价格	12-Bit Capacitance-to-Digital Converter
AD7152BRMZ-REEL	ADI	获取价格	12-Bit Capacitance-to-Digital Converter
AD7153	ADI	获取价格	12-Bit Capacitance-to-Digital Converter
AD7153BRMZ	ADI	获取价格	12-Bit Capacitance-to-Digital Converter
AD7153BRMZ-REEL	ADI	获取价格	12-Bit Capacitance-to-Digital Converter
AD7156	ADI	获取价格	Ultralow Power, 1.8 V, 3 mm × 3 mm, 2-Channel
AD7156BCPZ-REEL	ADI	获取价格	Ultralow Power, 1.8 V, 3 mm × 3 mm, 2-Channel

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