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AD7450BRM-REEL PDF预览

AD7450BRM-REEL

更新时间: 2024-11-23 12:33:51
品牌 Logo 应用领域
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
22页 435K
描述
Differential Input, 1 MSPS ADC in SOIC-8 and SO-8

AD7450BRM-REEL 数据手册

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Differential Input, 1 MSPS  
a
12-Bit ADC in SOIC-8 and SO-8  
AD7450  
FEATURES  
FUNCTIONAL BLOCK DIAGRAM  
Fast Throughput Rate: 1 MSPS  
Specified for VDD of 3 V and 5 V  
Low Power at Max Throughput Rate:  
3.75 mW Max at 833 kSPS with 3 V Supplies  
9 mW Max at 1 MSPS with 5 V Supplies  
Fully Differential Analog Input  
Wide Input Bandwidth:  
V
DD  
V
IN+  
12-BIT SUCCESSIVE  
APPROXIMATION  
ADC  
T/H  
V
IN–  
70 dB SINAD at 300 kHz Input Frequency  
Flexible Power/Serial Clock Speed Management  
No Pipeline Delays  
V
REF  
High-Speed Serial Interface—SPITM/QSPITM  
MICROWIRETM/DSP Compatible  
Power-Down Mode: 1 A Max  
8-Lead SOIC and SOIC Packages  
SCLK  
SDATA  
CS  
AD7450  
CONTROL  
LOGIC  
APPLICATIONS  
Transducer Interface  
Battery-Powered Systems  
Data Acquisition Systems  
Portable Instrumentation  
Motor Control  
GND  
Communications  
GENERAL DESCRIPTION  
The AD7450 is a 12-bit, high-speed, low power, successive  
approximation (SAR) analog-to-digital converter that features a  
fully differential analog input. It operates from a single 3 V or 5 V  
power supply and features throughput rates up to 833 kSPS or  
1 MSPS, respectively.  
The AD7450 uses advanced design techniques to achieve low  
power dissipation at high throughput rates.  
PRODUCT HIGHLIGHTS  
1. Operation with either 3 V or 5 V power supplies.  
This part contains a low noise, wide bandwidth, differential track  
and-hold amplifier (T/H) that can handle input frequencies in  
excess of 1 MHz with the –3 dB point typically being 20 MHz.  
-
2. High throughput with low power consumption. With a 3 V  
supply, the AD7450 offers 3.75 mW max power consumption  
for 833 kSPS throughput.  
The reference voltage for the AD7450 is applied externally to the  
VREF pin and can be varied from 100 mV to 3.5 V, depending  
on the power supply and what suits the application. The value of  
the reference voltage determines the common-mode voltage  
range of the part. With this truly differential input structure and  
variable reference input, the user can select a variety of input  
ranges and bias points.  
3. Fully differential analog input.  
4. Flexible power/serial clock speed management. The conversion  
rate is determined by the serial clock, allowing the power  
to be reduced as the conversion time is reduced through  
the serial clock speed increase. This part also features a  
shutdown mode to maximize power efficiency at lower  
throughput rates.  
The conversion and data acquisition processes are controlled  
using CS and the serial clock, allowing the device to interface  
with microprocessors or DSPs. The input signals are sampled  
on the falling edge of CS, and the conversion is also initiated at  
this point.  
5. Variable voltage reference input.  
6. No pipeline delay.  
7. Accurate control of the sampling instant via a CS input and  
once-off conversion control.  
The SAR architecture of this part ensures that there are no  
pipeline delays.  
8. ENOB > 8 bits typically with 100 mV reference.  
SPI and QSPI are trademarks of Motorola, Inc.  
MICROWIRE is a trademark of National Semiconductor Corporation.  
Rev. A  
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  
www.analog.com  
Fax: 781/461/3113  
© Analog Devices, Inc., 2002  

AD7450BRM-REEL 替代型号

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AD7450BRMZ ADI

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AD7450BRM ADI

完全替代

Differential Input, 1MSPS, 12-Bit ADC in レSO-

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