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AD7091R-2BCPZ PDF预览

AD7091R-2BCPZ

更新时间: 2024-11-05 00:50:11
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亚德诺 - ADI /
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42页 861K
描述
2-/4-/8-Channel, 1 MSPS, Ultralow Power, 12-Bit SAR ADC

AD7091R-2BCPZ 数据手册

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2-/4-/8-Channel, 1 MSPS,  
Ultralow Power, 12-Bit SAR ADC  
Data Sheet  
AD7091R-2/AD7091R-4/AD7091R-8  
FEATURES  
FUNCTIONAL BLOCK DIAGRAM  
REF  
/
IN  
Ultralow system power  
REF  
OUT  
MUX  
ADC  
V
REGCAP  
OUT  
IN  
DD  
Flexible power/throughput rate management  
Normal mode  
1.4 mW at 1 MSPS  
Power-down mode  
550 nA typical at VDD = 5.25 V  
2.5V  
VREF  
V
V
0
1
IN  
12-BIT  
SUCCESSIVE  
APPROXIMATION  
ADC  
T/H  
IN  
V
V
2
3
IN  
V
DRIVE  
IN  
I/P  
435 nA typical at VDD = 3 V  
Programmable ALERT interrupt pin (4-/8-channel models)  
High performance  
1 MSPS throughput with no latency/pipeline delay  
SNR: 70 dB typical at 10 kHz input frequency  
THD: −80 dB typical at 10 kHz input frequency  
INL: 0.7 LSB typical, 1.0 LSB maximum  
Small system footprint  
V
V
4
MUX  
IN  
RESET  
CONVST  
SDO  
5
IN  
ON-CHIP  
OSC  
V
V
6
7
IN  
CONTROL LOGIC  
AND REGISTERS  
IN  
SDI  
SCLK  
CS  
CHANNEL  
SEQUENCER  
AD7091R-8  
On-chip accurate 2.5 V reference, 5 ppm/°C typical drift  
MUXOUT/ADCIN to allow single buffer amplifier  
Daisy-chain mode  
GND  
ALERT/  
BUSY/  
GPO  
GND  
1
GPO  
0
Figure 1.  
16-lead, 20-lead, and 24-lead 4 mm × 4 mm LFCSP packages  
16-lead, 20-lead, and 24-lead TSSOP packages  
Easy to use  
GENERAL DESCRIPTION  
The AD7091R-2/AD7091R-4/AD7091R-8 family is a multichannel  
12-bit, ultralow power, successive approximation analog-to-  
digital converter (ADC) that is available in two, four, or eight  
analog input channel options. The AD7091R-2/AD7091R-4/  
AD7091R-8 operate from a single 2.7 V to 5.25 V power supply  
and are capable of achieving a sampling rate of 1 MSPS.  
SPI/QSPI™/MICROWIRE™/DSP compatible digital interface  
Integrated programmable channel sequencer  
BUSY indication available (4-/8-channel models)  
Built in features for control and monitoring applications  
GPOx pins available (4-/8-channel models)  
Wide operating range  
Temperature range: −40°C to +125°C  
Specified for VDD of 2.7 V to 5.25 V  
The AD7091R-2/AD7091R-4/AD7091R-8 family offers up to eight  
single-ended analog input channels with a channel sequencer  
that allows a preprogrammed selection of channels to be converted  
sequentially. The AD7091R-2/AD7091R-4/ AD7091R-8 also  
feature an on-chip conversion clock, an on-chip accurate 2.5 V  
reference, and a high speed serial interface.  
APPLICATIONS  
Battery-powered systems  
Personal digital assistants  
Medical instruments  
The AD7091R-2/AD7091R-4/AD7091R-8 have a serial port  
interface (SPI) that allows data to be read after the conversion  
while achieving a 1 MSPS throughput rate. The conversion process  
Mobile communications  
Instrumentation and control systems  
Data acquisition systems  
Optical sensors  
CONVST  
and data acquisition are controlled using the  
pin.  
Diagnostic/monitoring functions  
The AD7091R-2/AD7091R-4/AD7091R-8 use advanced design  
techniques to achieve ultralow power dissipation at high  
throughput rates. They also feature flexible power management  
options. An on-chip configuration register allows the user to set up  
different operating conditions. These include power management,  
alert functionality, busy indication, channel sequencing, and  
general-purpose output pins. The MUXOUT and ADCIN pins  
allow signal conditioning of the multiplexer output prior to  
acquisition by the ADC.  
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  
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 ©2013–2015 Analog Devices, Inc. All rights reserved.  
Technical Support  
www.analog.com  
 
 
 
 

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