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參數(shù)資料
| 型號： | EVAL-AD7708EBZ |
| 廠商： | Analog Devices Inc |
| 文件頁數(shù)： | 1/44頁 |
| 文件大?。?/td> | 0K |
| 描述： | BOARD EVAL FOR AD7708 |
| 標準包裝： | 1 |
| ADC 的數(shù)量： | 1 |
| 位數(shù)： | 16 |
| 采樣率（每秒）： | 1.37k |
| 數(shù)據(jù)接口： | 串行 |
| 輸入范圍： | ±2.5 V |
| 在以下條件下的電源（標準）： | 3.84mW @ 3V |
| 工作溫度： | -40°C ~ 85°C |
| 已用 IC / 零件： | AD7708 |
| 已供物品： | 板，CD |
| 相關(guān)產(chǎn)品： | AD7708BRZ-ND - IC ADC 16BIT R-R 8/10CH 28SOIC AD7708BRUZ-REEL7-ND - IC ADC 16BIT R-R 8/10CH 28TSSOP AD7708BRZ-REEL7-ND - IC ADC 16BIT R-R 8/10CH 28SOIC AD7708BRZ-REEL-ND - IC ADC 16BIT R-R 8/10CH 28SOIC AD7708BRUZ-REEL-ND - IC ADC 16BIT R-R 8/10CH 28TSSOP AD7708BRUZ-ND - IC ADC 16BIT R-R 8/10CH 28-TSSOP AD7708BRU-REEL7-ND - IC ADC 16BIT R-R 8/10CH 28-TSSOP AD7708BRU-REEL-ND - IC ADC 16BIT R-R 8/10CH 28-TSSOP AD7708BRU-ND - IC ADC 16BIT R-R 8/10CH 28-TSSOP AD7708BR-REEL7-ND - IC ADC 16BIT R-R 8/10CH 28-SOIC 更多... |
| 其它名稱： | EVAL-AD7708EB EVAL-AD7708EB-ND |
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REV. 0
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. No license is granted by implication or otherwise
under any patent or patent rights of Analog Devices.
a
AD7708/AD7718
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700
www.analog.com
Fax: 781/326-8703
Analog Devices, Inc., 2001
8-/10-Channel, Low Voltage,
Low Power, - ADCs
FUNCTIONAL BLOCK DIAGRAM
DVDD
XTAL1 XTAL2
MUX
POS BUF
-
ADC*
AIN1
AIN2
AIN3
AIN4
PGA
OSC
AND
PLL
SERIAL
INTERFACE
AND
CONTROL
LOGIC
DOUT
DIN
SCLK
CS
RDY
RESET
AVDD
I/O PORT
AVDD
AD7708/ AD7718
DGND
P2
P1
REFIN2(+)/AIN9
REFIN1(+) REFIN2(–)/AIN10
REFIN1(–)
AINCOM
AIN5
AIN6
AIN7
AIN8
AGND
*AD7708 16-BIT ADC
*AD7718 24-BIT ADC
REFIN(+)
REFIN(–)
NEG BUF
FEATURES
8-/10-Channel, High Resolution
-
ADCs
AD7708 Has 16-Bit Resolution
AD7718 Has 24-Bit Resolution
Factory-Calibrated
Single Conversion Cycle Setting
Programmable Gain Front End
Simultaneous 50 Hz and 60 Hz Rejection
VREF Select Allows Absolute and Ratiometric
Measurement Capability
Operation Can Be Optimized for
Analog Performance (
CHOP = 0) or
Channel Throughput (
CHOP = 1)
INTERFACE
3-Wire Serial
SPITM, QSPITM, MICROWIRETM, and DSP-Compatible
Schmitt Trigger on SCLK
POWER
Specified for Single 3 V and 5 V Operation
Normal: 1.28 mA Typ @ 3 V
Power-Down: 30
A (32 kHz Crystal Running)
On-Chip Functions
Rail-to-Rail Input Buffer and PGA
2-Bit Digital I/O Port
APPLICATIONS
Industrial Process Control
Instrumentation
Pressure Transducers
Portable Instrumentation
Smart Transmitters
SPI and QSPI are trademarks of Motorola Inc.
MICROWIRE is a trademark of National Semiconductor Corp.
VREF Select is a trademark of Analog Devices, Inc.
GENERAL DESCRIPTION
The AD7708/AD7718 are complete analog front-ends for low
frequency measurement applications. The AD7718 contains a
24-bit
Σ- ADC with PGA and can be configured as 4/5 fully-
differential input channels or 8/10 pseudo-differential input
channels. Two pins on the device are configurable as analog
inputs or reference inputs. The AD7708 is a 16-bit version of
the AD7718. Input signal ranges from 20 mV to 2.56 V can be
directly converted using these ADCs. Signals can be converted
directly from a transducer without the need for signal conditioning.
The device operates from a 32 kHz crystal with an on-board PLL
generating the required internal operating frequency. The output
data rate from the part is software programmable. The peak-to-
peak resolution from the part varies with the programmed gain
and output data rate.
The part operates from a single 3 V or 5 V supply. When operating
from 3 V supplies, the power dissipation for the part is 3.84 mW typ.
Both parts are pin-for-pin compatible allowing an upgradable
path from 16 to 24 bits without the need for hardware modifica-
tions. The AD7708/AD7718 are housed in 28-lead SOIC and
TSSOP packages.
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