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AD7091R

更新时间： 2024-11-04 12:29:07
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亚德诺 - ADI /
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20页 454K
描述
1 MSPS, Ultralow Power, 12-Bit ADC in 10-Lead LFCSP and MSOP

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AD7091R 数据手册

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1 MSPS, Ultralow Power,  
12-Bit ADC in 10-Lead LFCSP and MSOP  
Data Sheet  
AD7091R  
FEATURES  
FUNCTIONAL BLOCK DIAGRAM  
REGCAP  
REF /REF  
V
DD  
IN  
OUT  
Fast throughput rate of 1 MSPS  
Specified for VDD of 2.7 V to 5.25 V  
Logic voltage VDRIVE of 1.65 V to 5.25 V  
INL of 1 LSB maximum  
Analog input range of 0 V to VREF  
Ultralow power  
2.5V  
REF  
AD7091R  
SDO  
SCLK  
CS  
SERIAL  
INTERFACE  
12-BIT  
SAR  
T/H  
V
IN  
V
349 µA typical at 3 V and 1 MSPS  
264 nA typical at 3 V in power-down mode  
Internal 2.5 V reference, 4.5 ppm/°C typical drift  
Wide input bandwidth  
DRIVE  
CLK  
OSC  
CONVERSION  
CONTROL LOGIC  
CONVST  
Flexible power/throughput rate management  
High speed serial interface  
SPI®/QSPI™/MICROWIRE™/DSP compatible  
BUSY indicator  
Power-down mode  
10-lead, 3 mm × 2 mm LFCSP and 10-lead MSOP packages  
Temperature range of −40°C to +125°C  
GND  
Figure 1.  
1100  
1000  
900  
800  
700  
600  
500  
400  
300  
200  
100  
0
= V  
= 3V  
DRIVE  
V
DD  
APPLICATIONS  
Battery-powered systems  
Handheld meters  
Medical instruments  
Mobile communications  
Instrumentation and control systems  
Data acquisition systems  
Optical sensors  
V
DD  
V
DRIVE  
0
200  
400  
600  
800  
1000  
Diagnostic/monitoring functions  
Energy harvesting  
THROUGHPUT RATE (kSPS)  
Figure 2. Power vs. Throughput Rate  
The AD7091R uses advanced design and process techniques to  
achieve very low power dissipation at high throughput rates. An  
on-chip, accurate 2.5 V reference is available.  
GENERAL DESCRIPTION  
The AD7091R is a 12-bit successive approximation analog-to-  
digital converter (ADC) that offers ultralow power consumption  
(typically 349 µA at 3 V and 1 MSPS) while achieving fast  
throughput rates (1 MSPS with a 50 MHz SCLK). Operating  
from a single 2.7 V to 5.25 V power supply, the part contains a  
wide bandwidth track-and-hold amplifier that can handle input  
frequencies in excess of 7 MHz. The AD7091R also features an  
on-chip conversion clock, accurate reference, and high speed  
serial interface.  
PRODUCT HIGHLIGHTS  
1. Lowest Power 12-Bit SAR ADC Available.  
2. On-Chip, Accurate 2.5 V Reference.  
3. High Throughput Rate with Ultralow Power Consumption.  
4. Flexible Power/Throughput Rate Management.  
Average power scales with the throughput rate. Power-down  
mode allows the average power consumption to be reduced  
when the device is not performing a conversion.  
5. Single Supply Operation with VDRIVE Function.  
The AD7091R operates from a single 2.7 V to 5.25 V supply.  
The VDRIVE function allows the serial interface to connect  
directly to 1.8 V to 3.3 V processors.  
The conversion process and data acquisition are controlled using  
CONVST  
a
signal and an internal oscillator. The AD7091R has  
a serial interface that allows data to be read after the conversion  
while achieving a 1 MSPS throughput rate.  
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  
rightsof third parties that may result fromits 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 andregisteredtrademarks are the 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  
©2012 Analog Devices, Inc. All rights reserved.  
 
 
 
 
 
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