您的位置：维库电子市场网 > Datasheet > AD7794

AD7794 Datasheet

  • AD7794

  • 6-Channel, Low Noise, Low Power, 24-Bit Σ-Δ ADC with On-Ch...

  • 2396.00KB

  • 38页

  • AD

阅览下载 纠错 0

扫码查看芯片数据手册

上传产品规格书

PDF预览

Preliminary Technical Data
FEATURES
Low Power, 24-Bit Sigma-Delta ADC with In-
Amp and Embedded Reference (6 Channel)
AD7794
APPLICATIONS
Temperature measurement
Pressure measurement
Weigh scales
Six Differential Analog Inputs
Low Noise Programmable Gain Instrumentation-Amp
RMS noise: 80 nV (Gain = 64)
Bandgap Reference with 5 ppm/ C Drift typ
Power
Supply: 2.7 V to 5.25 V operation
Normal: 400 碌A typ
Power-down: 1 碌A max
Update Rate: 4 Hz to 500 Hz
Simultaneous 50 Hz/60 Hz Rejection
Internal Clock Oscillator
Reference Detect
Programmable Current Sources (10 碌A/200 碌A/1 mA)
On-Chip Bias Voltage Generator
100 nA Burnout Currents
Low Side Power Switch
Independent Interface Power Supply
24-Lead TSSOP Package
GENERAL DESCRIPTION
The AD7794 is a low power, complete analog front end for
low frequency measurement applications. It contains a low
noise 24-bit 鈭?鈭?ADC with six differential inputs. The on-chip
low noise instrumentation amplifier means that signals of small
amplitude can be interfaced directly to the ADC.
The device contains a precision low noise, low drift internal
reference for absolute measurements. An external reference can
also be used if ratiometric measurements are required. Other
on-chip features include programmable excitation current
sources and a bias voltage generator for temperature applica-
tions along with 100 nA burnout currents. For pressure and
weighscale applications, a low-side power switch is available to
power down the bridge between conversions to minimize the
power consumption of the system. The device can be operated
with the internal clock or, alternatively, an external clock can be
used if synchronizing several devices. The output data rate
from the part is software programmable and can be varied from
4 Hz to 500 Hz.
The part operates with a power supply from 2.7 V to 5.25 V. It
consumes a current of 450 uA maximum and is housed in a 24-
lead TSSOP package.
INTERFACE
3-wire serial
SPI庐, QSPI鈩? MICROWIRE鈩? and DSP compatible
Schmitt trigger on SCLK
FUNCTIONAL BLOCK DIAGRAM
GND
VBIAS
AIN1(+)
AIN1(-)
AIN2(+)
AIN2(-)
AIN3(+)
AIN3(-)
AIN5(+)/IOUT2
AIN5(-)/IOUT1
AIN6(+)/P1
AIN6(-)/P2
PSW
GND
CLK
VDD
BANDGAP
REFERENCE
GND
IN-AMP
MUX
SIGMA DELTA
ADC
SERIAL
INTERFACE
AND
CONTROL
LOGIC
DOUT/RDY
DIN
SCLK
CS
REFERENCE
DETECT
AVDD
AIN4(+)/REFIN2(+) REFIN1(+) AIN4(-)/REFIN2(-)
REFIN1(-)
GND
VDD
TEMP
SENSOR
INTERNAL
CLOCK
AD7794
DVDD
REV.PrE
6/04.
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
registered trademarks are the property of their respective companies.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
www.analog.com
Tel: 781.329.4700
Fax: 781.326.8703
漏 2004 Analog Devices, Inc. All rights reserved.

AD7794相关型号PDF文件下载

您可能感兴趣的PDF文件资料

热门IC型号推荐

©2025 维库电子市场网（www.dzsc.com）　备案号：浙B2-20050339-1 经营许可证：浙B2-20210386版权声明
买家服务热线：0571-85317607 | 买家服务部QQ： QQ:1609526468
卖家服务热线：0571-85317607 | 卖家服务部QQ： QQ:331652727

扫码下载APP，
一键连接广大的电子世界。

在线人工客服

买家服务：
卖家服务：
技术客服：

0571-85317607

网站技术支持

13606545031

客服在线时间周一至周五
9:00-17:30

关注官方微信号，
第一时间获取资讯。

建议反馈
返回顶部

建议反馈

联系人：

联系方式：

按住滑块，拖拽到最右边
>>
感谢您向阿库提出的宝贵意见，您的参与是维库提升服务的动力！意见一经采纳，将有感恩红包奉上哦！

PDF纠错X

投诉电话：0571-85317607 投诉QQ：

如选匿名将无法为您反馈投诉结果，建议实名投诉！