- 您現在的位置：買賣IC網 > PDF目錄1892 > AD7747ARUZ-REEL7 (Analog Devices Inc)IC CONV CAP TO DIG 24BIT 16TSSOP PDF資料下載
參數資料
| 型號： | AD7747ARUZ-REEL7 |
| 廠商： | Analog Devices Inc |
| 文件頁數： | 1/28頁 |
| 文件大小： | 0K |
| 描述： | IC CONV CAP TO DIG 24BIT 16TSSOP |
| 標準包裝： | 1,000 |
| 類型： | 電容數字轉換器 |
| 分辨率（位）： | 24 b |
| 數據接口： | 串行 |
| 電壓電源： | 單電源 |
| 電源電壓： | 2.7 V ~ 5.25 V |
| 工作溫度： | -40°C ~ 125°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 16-TSSOP（0.173"，4.40mm 寬） |
| 供應商設備封裝： | 16-TSSOP |
| 包裝： | 帶卷 (TR) |
| 配用： | EVAL-AD7747EBZ-ND - BOARD EVAL FOR AD7747 |
當前第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁
24-Bit Capacitance-to-Digital Converter
with Temperature Sensor
AD7747
Rev. 0
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibilityis assumedbyAnalogDevicesforitsuse,norforanyinfringements of patents or other
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
2007 Analog Devices, Inc. All rights reserved.
FEATURES
Capacitance-to-digital converter
New standard in single chip solutions
Interfaces to single or differential grounded sensors
Resolution down to 20 aF (that is, up to 19.5-bit ENOB)
Accuracy: 10 fF
Linearity: 0.01%
Common-mode (not changing) capacitance up to 17 pF
Full-scale (changing) capacitance range ±8 pF
Update rate: 5 Hz to 45 Hz
Simultaneous 50 Hz and 60 Hz rejection at 8.1 Hz update
Active shield for shielding sensor connection
Temperature sensor on-chip
Resolution: 0.1°C, accuracy: ±2°C
Voltage input channel
Internal clock oscillator
2-wire serial interface (I2C compatible)
Power
2.7 V to 5.25 V single-supply operation
0.7 mA current consumption
Operating temperature: 40°C to +125°C
16-lead TSSOP package
APPLICATIONS
Automotive, industrial, and medical systems for
Pressure measurement
Position sensing
Proximity sensing
Level sensing
Flow metering
Impurity detection
GENERAL DESCRIPTION
The AD7747 is a high-resolution, Σ-Δ capacitance-to-digital
converter (CDC). The capacitance to be measured is connected
directly to the device inputs. The architecture features inherent
high resolution (24-bit no missing codes, up to 19.5-bit effective
resolution), high linearity (±0.01%), and high accuracy (±10 fF
factory calibrated). The AD7747 capacitance input range is
±8 pF (changing), and it can accept up to 17 pF common-mode
capacitance (not changing), which can be balanced by a program-
mable on-chip digital-to-capacitance converter (CAPDAC).
The AD7747 is designed for single-ended or differential
capacitive sensors with one plate connected to ground. For
floating (not grounded) capacitive sensors, the AD7745 or
AD7746 are recommended.
The part has an on-chip temperature sensor with a resolution of
0.1°C and accuracy of ±2°C. The on-chip voltage reference and
the on-chip clock generator eliminate the need for any external
components in capacitive sensor applications. The part has a
standard voltage input that, together with the differential reference
input, allows easy interface to an external temperature sensor,
such as an RTD, thermistor, or diode.
The AD7747 has a 2-wire, I2C-compatible serial interface. The
part can operate with a single power supply of 2.7 V to 5.25 V.
It is specified over the automotive temperature range of
40°C to +125°C and is housed in a 16-lead TSSOP package.
FUNCTIONAL BLOCK DIAGRAM
VIN(+)
VDD
CIN1(+)
VIN(–)
SHLD
GND
SDA
SCL
RDY
CIN1(–)
REFIN(+)
REFIN(–)
TEMP
SENSOR
24-BIT Σ-Δ
GENERATOR
DIGITAL
FILTER
I2C
SERIAL
INTERFACE
EXCITATION
CONTROL LOGIC
CALIBRATION
VOLTAGE
REFERENCE
CAP DAC 1
CAP DAC 2
CLOCK
GENERATOR
MUX
AD7747
0546
9-
00
1
Figure 1.
相關PDF資料 |
PDF描述 |
|---|---|
| AD7808BR | IC DAC 10BIT 3.3V OCTAL 24-SOIC |
| AD7849CR | IC DAC 16BIT SRL INP 20-SOIC |
| AD7868BNZ | IC I/O PORT 12BIT ANLG 24-DIP |
| AD7869JRZ | IC I/O PORT 14BIT ANLG 28SOIC |
| AD7874SE | IC DAS 12BIT 4CH 5V 28-CLCC |
相關代理商/技術參數 |
參數描述 |
|---|---|
| AD7748BSTZ | 制造商:Analog Devices 功能描述: |
| AD774B | 制造商:AD 制造商全稱:Analog Devices 功能描述:Complete 12-Bit A/D Converters |
| AD774BAD | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| AD774BAR | 功能描述:IC ADC 12BIT W/BUFF REF 28-SOIC RoHS:否 類別:集成電路 (IC) >> 數據采集 - 模數轉換器 系列:- 標準包裝:1 系列:- 位數:14 采樣率（每秒）:83k 數據接口:串行，并聯(lián) 轉換器數目:1 功率耗散（最大）:95mW 電壓電源:雙 ± 工作溫度:0°C ~ 70°C 安裝類型:通孔 封裝/外殼:28-DIP（0.600"，15.24mm） 供應商設備封裝:28-PDIP 包裝:管件 輸入數目和類型:1 個單端，雙極 |
發(fā)布緊急采購，3分鐘左右您將得到回復。