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AD7475ARMZ-REEL7

更新时间： 2024-11-09 14:33:31
品牌 Logo 应用领域
亚德诺 - ADI 光电二极管转换器
页数 文件大小 规格书
24页 507K
描述
1 MSPS, 12-Bit A/D Converter in MSOP-8 or SOIC-8

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AD7475ARMZ-REEL7 数据手册

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1 MSPS,12-Bit ADCs  
Data Sheet  
AD7475/AD7495  
FEATURES  
FUNCTIONAL BLOCK DIAGRAM  
V
DD  
Fast throughput rate: 1 MSPS  
Specified for VDD of 2.7 V to 5.25 V  
Low power  
12-BIT  
SUCCESSIVE  
APPROXIMATION  
ADC  
T/H  
V
IN  
REF IN  
4.5 mW max at 1 MSPS with 3 V supplies  
10.5 mW max at 1 MSPS with 5 V supplies  
Wide input bandwidth: 68 dB SNR at 300 kHz input frequency  
Flexible power/serial clock speed management  
No pipeline delays  
SCLK  
SDATA  
CS  
CONTROL  
LOGIC  
V
DRIVE  
AD7475  
High speed serial interface  
SPI-/QSPI™-/MICROWIRE-/DSP-compatible  
On-board reference: 2.5 V (AD7495 only)  
Standby mode: 1 μA max  
GND  
V
DD  
12-BIT  
SUCCESSIVE  
APPROXIMATION  
ADC  
8-lead MSOP and SOIC packages  
T/H  
V
IN  
APPLICATIONS  
REF OUT  
BUF  
2.5V  
Battery-powered systems  
Personal digital assistants  
Medical instruments  
SCLK  
SDATA  
CS  
CONTROL  
LOGIC  
REFERENCE  
Mobile communications  
Instrumentation and control systems  
Data acquisition systems  
Optical sensors  
V
DRIVE  
AD7495  
GND  
Figure 1.  
GENERAL DESCRIPTION  
PRODUCT HIGHLIGHTS  
The AD7475/AD74951 are 12-bit, high speed, low power,  
successive-approximation ADCs that operate from a single  
2.7 V to 5.25 V power supply with throughput rates up to 1 MSPS.  
They contain a low noise, wide bandwidth track-and-hold  
amplifier that can handle input frequencies above 1 MHz.  
1. The AD7475 offers 1 MSPS throughput rates with 4.5 mW  
power consumption.  
2. Single-supply operation with VDRIVE function. The  
AD7475/AD7495 operate from a single 2.7 V to 5.25 V  
supply. The VDRIVE function allows the serial interface to  
connect directly to either 3 V or 5 V processor systems  
The conversion process and data acquisition are controlled  
using  
and the serial clock, allowing the devices to interface  
CS  
with microprocessors or DSPs. The input signal is sampled on  
the falling edge of and conversion is initiated at this point.  
independent of VDD  
.
3. Flexible power/serial clock speed management. The  
conversion rate is determined by the serial clock, allowing  
the conversion time to be reduced through the serial clock  
speed increase. The devices also feature shutdown modes  
to maximize power efficiency at lower throughput rates.  
This allows the average power consumption to reduce while  
not converting. Power consumption is 1 μA when in full  
shutdown.  
CS  
The conversion time is determined by the SCLK frequency.  
There are no pipeline delays associated with the device.  
The AD7475/AD7495 use advanced design techniques to  
achieve very low power dissipation at high throughput rates.  
With 3 V supplies and a 1 MSPS throughput rate, the AD7475  
consumes just 1.5 mA, while the AD7495 consumes 2 mA. With  
5 V supplies and 1 MSPS, the current consumption is 2.1 mA  
for the AD7475 and 2.6 mA for the AD7495.  
4. No pipeline delay. The devices feature a standard successive  
approximation ADC with accurate control of the sampling  
instant via a  
input and once-off conversion control.  
The analog input range for the devices is 0 V to REF IN. The  
2.5 V reference for the AD7475 is applied externally to the REF IN  
pin, while the AD7495 has an on-board 2.5 V reference.  
CS  
1Protected by U.S. Patent No. 6,681,332  
Rev. C  
Document Feedback  
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  
Technical Support  
©2001-2015 Analog Devices, Inc. All rights reserved.  
www.analog.com  
 
 
 
 
 
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AD7475ARMZ-REEL7 替代型号

型号 品牌 替代类型 描述 数据表
AD7475ARM-REEL7 ADI

完全替代

 1MSPS,12-Bit ADCs
AD7475ARM ADI

完全替代

 1 MSPS, 12-Bit ADCs

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