5秒后页面跳转
AD7821KPZ PDF预览

AD7821KPZ

更新时间: 2024-11-10 01:19:39
品牌 Logo 应用领域
亚德诺 - ADI PC转换器
页数 文件大小 规格书
16页 816K
描述
LC2MOS High Speed, P Compatible 8-Bit ADC with Track/Hold Function

AD7821KPZ 数据手册

 浏览型号AD7821KPZ的Datasheet PDF文件第2页浏览型号AD7821KPZ的Datasheet PDF文件第3页浏览型号AD7821KPZ的Datasheet PDF文件第4页浏览型号AD7821KPZ的Datasheet PDF文件第5页浏览型号AD7821KPZ的Datasheet PDF文件第6页浏览型号AD7821KPZ的Datasheet PDF文件第7页 
LC2MOS High Speed, P Compatible  
8-Bit ADC with Track/Hold Function  
a
AD7821  
FUNCTIONAL BLOCK DIAGRAM  
FEATURES  
Fast Conversion Time: 660 ns Max  
100 kHz Track-and-Hold Function  
1 MHz Sample Rate  
Unipolar and Bipolar Input Ranges  
Ratiometric Reference Inputs  
No External Clock  
Extended Temperature Range Operation  
Skinny 20-Lead DlPs, SOIC, and 20-Terminal  
Surface-Mount Packages  
GENERAL DESCRIPTION  
PRODUCT HIGHLIGHTS  
The AD7821 is a high speed, 8-bit, sampling, analog-to-digital  
converter that offers improved performance over the popular  
AD7820. It offers a conversion time of 660 ns (versus 1.36 µs  
for the AD7820) and 100 kHz signal bandwidth (versus 6.4  
kHz). The sampling instant is better defined and occurs on the  
falling edge of WR or RD. The provision of a VSS pin (Pin 19)  
allows the part to operate from 5 V supplies and to digitize  
bipolar input signals. Alternatively, for unipolar inputs, the VSS pin  
can be grounded and the AD7821 will operate from a single +5 V  
supply, like the AD7820.  
1. Fast Conversion Time  
The half-flash conversion technique, coupled with fabrication  
on Analog Devices’ LC2MOS process, enables a very fast con-  
version time. The conversion time for the WR-RD mode is  
660 ns, with 700 ns for the RD mode.  
2. Built-In Track-and-Hold  
This allows input signals with slew rates up to 1.6 V/µs to be  
converted to 8 bits without an external track-and-hold. This  
corresponds to a 5 V peak-to-peak, 100 kHz sine wave signal.  
3. Total Unadjusted Error  
The AD7821 features an excellent total unadjusted error figure  
of less than 1 LSB over the full operating temperature range.  
The AD7821 has a built-in track-and-hold function capable of  
digitizing full-scale signals up to 100 kHz max. It also uses a  
half-flash conversion technique that eliminates the need to gen-  
erate a CLK signal for the ADC.  
4. Unipolar/Bipolar Input Ranges  
The AD7821 is specified for single-supply (+5 V) operation  
with a unipolar full-scale range of 0 to +5 V, and for dual-supply  
( 5 V) operation with a bipolar input range of 2.5 V. Typical  
performance characteristics are given for other input ranges.  
The AD7821 is designed with standard microprocessor control  
signals (CS, RD, WR, RDY, INT) and latched, three-state data  
outputs capable of interfacing to high speed data buses. An  
overflow output (OFL) is also provided for cascading devices to  
achieve higher resolution.  
5. Dynamic Specifications for DSP Users  
In addition to the traditional ADC specifications, the  
AD7821 is specified for ac parameters, including signal-to-  
noise ratio, distortion, and slew rate.  
The AD7821 is fabricated in Linear Compatible CMOS  
(LC2MOS), an advanced, mixed technology process combining  
precision bipolar circuits with low power CMOS logic. The part  
features a low power dissipation of 50 mW.  
REV. B  
Information furnished by Analog Devices is believed to be accurate and  
reliable. However, no responsibility is assumed by Analog Devices for its  
use, norforanyinfringementsofpatentsorotherrightsofthirdpartiesthat  
may result from its use. No license is granted by implication or otherwise  
under any patent or patent rights of Analog Devices.  
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.  
Tel: 781/329-4700  
Fax: 781/326-8703  
www.analog.com  
© Analog Devices, Inc., 2002  

AD7821KPZ 替代型号

型号 品牌 替代类型 描述 数据表
AD7821KPZ-REEL ADI

完全替代

High Speed, µP-Compatible, CMOS, 8-Bit Sampling ADC
AD7821KP ADI

完全替代

LC2MOS High Speed, mP-Compatible 8-Bit ADC with Track/Hold Function

与AD7821KPZ相关器件

型号 品牌 获取价格 描述 数据表
AD7821KPZ-REEL ADI

获取价格

High Speed, µP-Compatible, CMOS, 8-Bit Sampling ADC
AD7821KR ADI

获取价格

LC2MOS High Speed, mP-Compatible 8-Bit ADC with Track/Hold Function
AD7821KRZ-REEL ADI

获取价格

暂无描述
AD7821TE ADI

获取价格

LC2MOS High Speed, mP-Compatible 8-Bit ADC with Track/Hold Function
AD7821TE/883B ETC

获取价格

Analog-to-Digital Converter, 8-Bit
AD7821TQ ADI

获取价格

LC2MOS High Speed, mP-Compatible 8-Bit ADC with Track/Hold Function
AD7821TQ/883B ETC

获取价格

Analog-to-Digital Converter, 8-Bit
AD7822 ADI

获取价格

3 V/5 V, 2 MSPS, 8-Bit, 1-, 4-, 8-Channel Sampling ADCs
AD7822_06 ADI

获取价格

3 V/5 V, 2 MSPS, 8-Bit, 1-/4-/8-Channel Sampling ADCs
AD7822_15 ADI

获取价格

3 V/5 V, 2 MSPS, 8-Bit, 1-/4-/8-Channel Sampling ADCs