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AD7851KN Folha de dados(PDF) 1 Page - Analog Devices

Nome de Peças AD7851KN
Descrição Electrónicos  14-Bit 333 kSPS Serial A/D Converter
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Fabricante Electrônico  AD [Analog Devices]
Página de início  http://www.analog.com
Logo AD - Analog Devices

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AD7851
FUNCTIONAL BLOCK DIAGRAM
AIN (+)
AIN (–)
CREF1
CREF2
CAL
AVDD
AGND
AGND
DVDD
DGND
AMODE
CLKIN
SLEEP
CONVST
BUSY
SYNC
SM1
SM2
DIN
DOUT SCLK POLARITY
CHARGE
REDISTRIBUTION
DAC
COMP
4.096V
REFERENCE
AD7851
BUF
T/H
SAR + ADC
CONTROL
CALIBRATION
MEMORY
AND CONTROLLER
SERIAL INTERFACE/CONTROL REGISTER
REFIN/
REFOUT
14-Bit 333 kSPS
Serial A/D Converter
FEATURES
Single 5 V Supply
333 kSPS Throughput Rate/ 2 LSB DNL—A Grade
285 kSPS Throughput Rate/ 1 LSB DNL—K Grade
A and K Grades Guaranteed to 125 C/238 kSPS
Throughput Rate
Pseudo-Differential Input with Two Input Ranges
System and Self-Calibration with Autocalibration on
Power-Up
Read/Write Capability of Calibration Data
Low Power: 60 mW Typ
Power-Down Mode: 5
W Typ Power Consumption
Flexible Serial Interface: 8051/SPI®/QSPI™/ P Compatible
24-Lead PDIP, SOIC, and SSOP Packages
APPLICATIONS
Digital Signal Processing
Speech Recognition and Synthesis
Spectrum Analysis
DSP Servo Control
Instrumentation and Control Systems
High Speed Modems
Automotive
GENERAL DESCRIPTION
The AD7851 is a high speed, 14-bit ADC that operates from a
single 5 V power supply. The ADC powers up with a set of default
conditions at which time it can be operated as a read-only ADC.
The ADC contains self-calibration and system calibration options
to ensure accurate operation over time and temperature and has a
number of power-down options for low power applications.
The AD7851 is capable of a 333 kHz throughput rate. The
input track-and-hold acquires a signal in 0.33
µs and features
a pseudo-differential sampling scheme. The AD7851 has the
added advantage of two input voltage ranges (0 V to VREF and
–VREF/2 to +VREF/2 centered about VREF/2). Input signal
range is to VDD and the part is capable of converting full
power signals to 20 MHz.
CMOS construction ensures low power dissipation (60 mW typ)
with power-down mode (5
µW typ). The part is available in a
24-lead, 0.3 inch-wide PDIP, a 24-lead SOIC, and a 24-lead
SSOP package.
PRODUCT HIGHLIGHTS
1. Single 5 V supply.
2. Operates with reference voltages from 4 V to VDD.
3. Analog input ranges from 0 V to VDD.
4. System and self-calibration including power-down mode.
5. Versatile serial I/O port.
REV. B
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
© 2004 Analog Devices, Inc. All rights reserved.
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. Trademarks and
registered trademarks are the property of their respective owners.


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