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AD7829BRWZ-1

更新时间： 2024-11-30 03:15:47
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亚德诺 - ADI 转换器模数转换器光电二极管
页数 文件大小 规格书
20页 388K
描述
3 V/5 V, 2 MSPS, 8-Bit, 8-Channel ADC

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AD7829BRWZ-1 数据手册

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3 V/5 V, 2 MSPS, 8-Bit, 8-Channel ADC  
AD7829-1  
FEATURES  
FUNCTIONAL BLOCK DIAGRAM  
V
8-bit half-flash ADC with 420 ns conversion time  
Eight single-ended analog input channels  
Available with input offset adjust  
On-chip track-and-hold  
SNR performance given for input frequencies  
up to10 MHz  
DD  
CONVST EOC A0 A1 A2  
CONTROL  
LOGIC  
COMP  
BUF  
2.5V  
REF  
V
V
V
V
V
V
V
V
IN1  
IN2  
IN3  
IN4  
IN5  
IN6  
IN7  
IN8  
V
REF IN/OUT  
On-chip reference (2.5 V)  
8-BIT  
INPUT  
MUX  
HALF  
FLASH  
ADC  
Automatic power-down at the end of conversion  
Wide operating supply range  
3 V 10% and 5 V 10%  
T/H  
DB7  
DB0  
PARALLEL  
PORT  
Input ranges  
0 V to 2 V p-p, VDD = 3 V 10%  
0 V to 2.5 V p-p, VDD = 5 V 10%  
V
AGND DGND  
MID  
CS RD  
Figure 1.  
EOC  
Flexible parallel interface with  
stand-alone operation  
pulse to allow  
APPLICATIONS  
Data acquisition systems, DSP front ends  
Disk drives  
Mobile communication systems, subsampling  
applications  
GENERAL DESCRIPTION  
The AD7829-1 is a high speed 8-channel, microprocessor-  
compatible, 8-bit analog-to-digital converter with a maximum  
throughput of 2 MSPS. The AD7829-1 contains an on-chip  
reference of 2.5 V (2% tolerance); a track-and-hold amplifier;  
a 420 ns, 8-bit half-flash ADC; and a high speed parallel  
interface. The converter can operate from a single 3 V 10%  
and 5 V 10% supply.  
The AD7829-1 is available in a 28-lead, wide body, small outline  
IC (SOIC_W) and a 28-lead thin shrink small outline package  
(TSSOP).  
PRODUCT HIGHLIGHTS  
1. Fast Conversion Time. The AD7829-1 has a conversion  
time of 420 ns. Faster conversion times maximize the DSP  
processing time in a real-time system.  
The AD7829-1 combines the convert start and power-down  
2. Analog Input Span Adjustment. The VMID pin allows the  
user to offset the input span. This feature can reduce the  
requirements of single-supply op amps and take into  
account any system offsets.  
CONVST  
functions at one pin, that is, the  
pin. This allows a  
unique automatic power-down at the end of a conversion to be  
CONVST  
implemented. The logic level on the  
pin is sampled  
EOC  
after the end of a conversion when an  
(end of conversion)  
3. FPBW (Full Power Bandwidth) of Track-and-Hold. The  
track-and-hold amplifier has excellent high frequency  
performance. The AD7829-1 is capable of converting full-  
scale input signals up to a frequency of 10 MHz, making  
the parts ideally suited to subsampling applications.  
signal goes high, and if it is logic low at that point, the ADC is  
powered down. The parallel interface is designed to allow easy  
interfacing to microprocessors and DSPs. Using only address  
decoding logic, the parts are easily mapped into the microprocessor  
address space.  
4. Channel Selection. Channel selection is made without the  
necessity of writing to the part.  
EOC  
The  
pulse allows the ADCs to be used in a stand-alone  
manner (see the Parallel Interface section).  
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. 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 registeredtrademarks arethe property of their respective owners.  
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.  
Tel: 781.329.4700  
Fax: 781.461.3113  
www.analog.com  
©2006 Analog Devices, Inc. All rights reserved.  
 
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AD7829BRWZ-1 替代型号

型号 品牌 替代类型 描述 数据表
AD7829BRZ ADI

完全替代

 3 V/5 V, 2 MSPS, 8-Bit, 1-/4-/8-Channel Sampling ADCs
AD7829BRUZ-1 ADI

完全替代

 3 V/5 V, 2 MSPS, 8-Bit, 8-Channel ADC

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