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您現在的位置：買賣IC網 > PDF目錄17142 > EVAL-AD7152EBZ (Analog Devices Inc)BOARD EVAL AD7152 PDF資料下載

參數資料

型號：	EVAL-AD7152EBZ
廠商：	Analog Devices Inc
文件頁數：	1/24頁
文件大小：	0K
描述：	BOARD EVAL AD7152
標準包裝：	1
傳感器類型：	觸摸，電容式
接口：	I²C
電源電壓：	2.7 V ~ 3.6 V
嵌入式：	否
已供物品：	板，CD
已用 IC / 零件：	AD7152
產品目錄頁面：	781 (CN2011-ZH PDF)
相關產品：	AD7152BRMZ-ND - IC CDC 12BIT 2/4CH 10MSOP AD7152BRMZ-REEL-ND - IC CDC 12BIT 2/4CH 10MSOP

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12-Bit Capacitance-to-Digital Converter

AD7152/AD7153

Rev. 0

Information furnished by Analog Devices is believed to be accurate and reliable. However, no

responsibilityis assumedbyAnalogDevicesfor itsuse,norfor anyinfringements ofpatents orother

rightsofthirdpartiesthatmayresultfromitsuse.Specificationssubjecttochangewithoutnotice.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

FEATURES

Capacitance-to-digital converters

Interfaces to floating sensors

Resolution down to 0.25 fF (that is, up to 12 ENOB)

Linearity: 0.05%

Common-mode (not changing) capacitance up to 5 pF

Four capacitance ranges selectable per operation mode

±0.25 pF to ±2 pF in differential mode

0.5 pF to 4 pF in single-ended mode

Tolerant of parasitic capacitance to ground up to 50 pF

Conversion time per channel: 5 ms, 20 ms, 50 ms, and 60 ms

Internal clock oscillator

2-wire serial interface (I2C-compatible)

Power

2.7 V to 3.6 V single-supply operation

100 μA current consumption

Operating temperature: 40°C to +85°C

10-lead MSOP package

APPLICATIONS

Automotive, industrial, and medical systems for

Pressure measurement

Position sensing

Level sensing

Flowmeters

Humidity sensing

GENERAL DESCRIPTION

The AD7152/AD7153 are 12-bit sigma-delta (Σ-Δ) capacitance-to-

digital converters (CDCs). The capacitance to be measured

is connected directly to the device inputs. The architecture

features inherent high resolution (12-bit no missing codes,

up to 12-bit effective resolution) and high linearity (±0.05%).

The AD7152/AD7153 have four capacitance input ranges per

operation mode, ±0.25 pF to ±2 pF in differential mode and

0.5 pF to 4 pF in single-ended mode.

The AD7152/AD7153 can accept up to 5 pF common-mode

capacitance (not changing), which can be balanced by a

programmable on-chip, digital-to-capacitance converter

(CAPDAC).

The AD7153 has one capacitance input channel, while the

AD7152 has two channels. Each channel can be configured

as single-ended or differential. The AD7152/AD7153 are

designed for floating capacitive sensors.

The AD7152/AD7153 have a 2-wire, I2C-compatible serial

interface. Both parts can operate with a single power supply

from 2.7 V to 3.6 V. They are specified over the temperature

range of 40°C to +85°C and are available in a 10-lead MSOP

package.

FUNCTIONAL BLOCK DIAGRAMS

DIGITAL

FILTER

12-BIT Σ-Δ

MODULATOR

CLOCK

GENERATOR

VOLTAGE

REFERENCE

AD7152

I2C

SERIAL

INTERFACE

EXCITATION

EXC2

CIN1(+)

CIN1(–)

CIN2(+)

CIN2(–)

EXC1

SDA

SCL

VDD

GND

CONTROL LOGIC

CALIBRATION

CAP+

CAP–

MUX

Figure 1.