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AD7709BRUZ-REEL

更新时间: 2024-02-17 06:08:54
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亚德诺 - ADI /
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AD7709BRUZ-REEL 数据手册

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PRELIMINARY TECHNICAL DATA  
16-Bit Sigma Delta ADC with Current Sources,  
a
Preliminary Technical Data  
SwitchableReferenceInputsandI/OPort  
AD7709  
FEATURES  
G E NE R AL D E S C R IP T IO N  
16-BIT SINGLE CHANNEL SIGMA DELTA-ADC  
Factory Calibrated (field calibration not required)  
Output settles in one conversion cycle (single conver  
sion m ode)  
Program m able Gain Front End  
16-bit No Missing Codes  
13-bit Pk-Pk Resolution @ 20Hz, 20m V Range  
16-bit Pk-PK Resolution @ 20Hz, 2.56V Range  
INTERFACE  
T he AD7709 is a complete analog front-end for low  
frequency measurement applications. T he AD7709  
contains a 16-bit sigma delta ADC with PGA and can be  
configured as 2 fully-differential input channels or 4  
pseudo-differential input channels. Inputs signal ranges  
from 20mV to 2.56V can be directly converted using the  
AD7709. T hese signals can be converted directly from a  
transducer without the need for signal conditioning. Other  
on-chip features include three software configurable  
current sources, switchable reference inputs, low side  
power switches and a 4-bit digital I/O port.  
Three-Wire Serial  
SPITM, QSPITM, MICROWIRETM and DSP Com patible  
Schm itt Trigger on SCLK  
T he device operates from a 32kHz crystal with an on-  
board PLL generating the required internal operating  
frequency. T he output data rate from the part is software  
programmable. T he pk-pk resolution from the part varies  
with the programmed gain and output data rate.  
POWER  
Specified for Single 3V and 5V operation  
Norm al : 2m A @ 3V  
Pow erdow n : 20uA (32kHz Crystal Running)  
On-Chip Functions  
T he part operates from a single +3V or +5V supply.  
When operating from +3V supplies, the power dissipation  
for the part is XmW. T he AD7709 are housed in a 24-  
pin SOIC and T SSOP packages.  
Rail-to-Rail Input Buffer and PGA  
Sw itchable Reference Inputs  
3 Configurable Current Sources  
Low Side Pow er Sw tches  
Digital I/ O Port  
APPLICATIONS  
Industrial Process Control  
Instrum entation  
FUNC TIO NAL BLO C K D IAGRAM  
REFIN2(+) REFIN1(+)  
REFIN2(-) REFIN1(-)  
XTAL1 XTAL2  
VDD  
Pressure Transducers  
Portable Instrum entation  
OSC  
&
.
I2  
I3  
I1  
PLL  
IOUT 1  
IOUT 2  
DOUT  
DIN  
SERIAL  
INTERFACE  
&
CONTROL  
LOGIC  
AIN1  
AIN2  
16-BIT  
Σ−∆ ADC  
BUF  
PGA  
SCLK  
CS  
MUX  
AIN3 / P3  
AIN4 / P4  
RDY  
RESET  
AINCOM  
AD7709  
VDD  
I/O PORT  
GND  
PWRGND  
SW1/P1 SW2/P2  
®
SPIand QSPI are a Registered Trademark of Motorola Inc.  
REV. PrA January 2001  
® MICROWIRE is a Registered Trademark of National Semiconductor Corp.  
Inform ation furnished by Analog Devices is believed to be accurate and  
reliable. However, no responsibility is assum ed by Analog Devices for its  
use, nor for any infringem ents of patents or other rights of third parties  
which m ay result from its use. No license is granted by im plication or  
otherwise under any patent or patent rights of Analog Devices.  
One Technology Way, P.O. Box 9106, Norw ood, MA 02062-9106, U.S.A.  
Tel: 781/ 329-4700  
World Wide Web Site: http:/ / w w w.analog.com  
Analog Devices, Inc., 2001  
Fax: 781/ 326-8703  

AD7709BRUZ-REEL 替代型号

型号 品牌 替代类型 描述 数据表
AD7709BRUZ-REEL7 ADI

完全替代

16-Bit Sigma Delta ADC with Current Sources, Switchable Reference Inputs and I/O Port
AD7709BRUZ ADI

完全替代

16-Bit Sigma Delta ADC with Current Sources, Switchable Reference Inputs and I/O Port
AD7709ARUZ ADI

完全替代

16-Bit-ADC with Switchable Current Sources

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