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AD7451ARM-REEL7

更新时间： 2024-11-24 03:35:27
品牌 Logo 应用领域
罗彻斯特 - ROCHESTER 光电二极管
页数 文件大小 规格书
24页 2965K
描述
ADC, Successive Approximation, 12-Bit, 1 Func, 1 Channel, Serial Access, PDSO8, MO-187AA, MSOP-8

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AD7451ARM-REEL7 数据手册

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Pseudo Differential Input, 1 MSPS,  
10-/12-Bit ADCs in an 8-Lead SOT-23  
AD7441/AD7451  
FUNCTIONAL BLOCK DIAGRAM  
FEATURES  
V
Fast throughput rate: 1 MSPS  
DD  
Specified for VDD of 2.7 V to 5.25 V  
Low power at maximum throughput rate:  
4 mW maximum at 1 MSPS with VDD = 3 V  
9.25 mW maximum at 1 MSPS with VDD = 5 V  
Pseudo differential analog input  
Wide input bandwidth:  
V
V
IN+  
12-BIT  
SUCCESSIVE  
APPROXIMATION  
ADC  
T/H  
IN–  
V
REF  
70 dB SINAD at 100 kHz input frequency  
Flexible power/serial clock speed management  
No pipeline delays  
SCLK  
High speed serial interface:  
SDATA  
AD7441/AD7451  
CONTROL LOGIC  
SPI®-/QSPI™-/MICROWIRE™-/DSP-compatible  
Power-down mode: 1 μA maximum  
8-lead SOT-23 and MSOP packages  
CS  
APPLICATIONS  
GND  
Transducer interface  
Figure 1.  
Battery-powered systems  
Data acquisition systems  
Portable instrumentation  
PRODUCT HIGHLIGHTS  
GENERAL DESCRIPTION  
1. Operation with 2.7 V to 5.25 V Power Supplies.  
The AD7441/AD74511 are, respectively, 10-/12-bit high speed,  
low power, single-supply, successive approximation (SAR),  
analog-to-digital converters (ADCs) that feature a pseudo  
differential analog input. These parts operate from a single  
2.7 V to 5.25 V power supply and achieve very low power  
dissipation at high throughput rates of up to 1 MSPS.  
2. High Throughput with Low Power Consumption.  
With a 3 V supply, the AD7441/AD7451 offer 4 mW maxi-  
mum power consumption for a 1 MSPS throughput rate.  
3. Pseudo 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. These  
parts also feature a shutdown mode to maximize power  
efficiency at lower throughput rates.  
The AD7441/AD7451 contain a low noise, wide bandwidth,  
differential track-and-hold (T/H) amplifier that handles input  
frequencies up to 3.5 MHz. The reference voltage for these  
devices is applied externally to the VREF pin and can range from  
100 mV to VDD, depending on the power supply and what suits  
the application.  
5. Variable Voltage Reference Input.  
6. No Pipeline Delays.  
The conversion process and data acquisition are controlled  
CS  
using  
with microprocessors or DSPs. The input signals are sampled  
CS  
and the serial clock, allowing the device to interface  
CS  
7. Accurate Control of Sampling Instant via  
Once-Off Conversion Control.  
Input and  
on the falling edge of  
The SAR architecture of these parts ensures that there are no  
pipeline delays.  
when the conversion is initiated.  
8. ENOB > 10 Bits Typically with 500 mV Reference.  
1 Protected by U.S. Patent Number 6,681,332.  
Rev. C  
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  
www.analog.com  
Fax: 781.461.3113 ©2003–2007 Analog Devices, Inc. All rights reserved.  
 
 
 
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