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| 型號(hào)： | EVAL-AD7152EBZ |
| 廠商： | Analog Devices Inc |
| 文件頁數(shù)： | 1/24頁 |
| 文件大?。?/td> | 0K |
| 描述： | BOARD EVAL AD7152 |
| 標(biāo)準(zhǔn)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(chǎn)品目錄頁面： | 781 (CN2011-ZH PDF) |
| 相關(guān)產(chǎn)品： | AD7152BRMZ-ND - IC CDC 12BIT 2/4CH 10MSOP AD7152BRMZ-REEL-ND - IC CDC 12BIT 2/4CH 10MSOP |
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
2008 Analog Devices, Inc. All rights reserved.
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
07
45
0-
0
01
EXCITATION
EXC2
CIN1(+)
CIN1(–)
CIN2(+)
CIN2(–)
EXC1
SDA
SCL
VDD
GND
CONTROL LOGIC
CALIBRATION
CAP+
CAP–
MUX
Figure 1.
DIGITAL
FILTER
12-BIT Σ-Δ
MODULATOR
CLOCK
GENERATOR
VOLTAGE
REFERENCE
AD7153
I2C
SERIAL
INTERFACE
07
45
0-
0
02
EXCITATION
CIN1(+)
CIN1(–)
EXC1
SDA
SCL
VDD
GND
CONTROL LOGIC
CALIBRATION
CAP+
CAP–
MUX
Figure 2.
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