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Analog Devices Semiconductor Electronic Components Datasheet

AD7091R Datasheet

12-Bit ADC

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Data Sheet
1 MSPS, Ultralow Power,
12-Bit ADC in 10-Lead LFCSP and MSOP
AD7091R
FEATURES
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
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
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
APPLICATIONS
Battery-powered systems
Handheld meters
Medical instruments
Mobile communications
Instrumentation and control systems
Data acquisition systems
Optical sensors
Diagnostic/monitoring functions
Energy harvesting
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.
The conversion process and data acquisition are controlled using
a CONVST 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.
FUNCTIONAL BLOCK DIAGRAM
REGCAP REFIN/REFOUT
VDD
2.5V AD7091R
REF
VIN T/H
12-BIT
SAR
SERIAL
INTERFACE
CONVERSION
CONTROL LOGIC
CLK
OSC
SDO
SCLK
CS
VDRIVE
CONVST
GND
Figure 1.
1100
1000
VVDDDD == VVDDRRIVIVEE ==33VV
900
800
700
600
500
VDD
400
300
200
100
0
0
VDRIVE
200 400 600 800
THROUGHPUT RATE (kSPS)
1000
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.
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.
Rev. 0
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibilityisassumedbyAnalogDevices for itsuse,nor foranyinfringementsofpatentsor 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.
Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.
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
©2012 Analog Devices, Inc. All rights reserved.
Free Datasheet http://www.nDatasheet.com


Analog Devices Semiconductor Electronic Components Datasheet

AD7091R Datasheet

12-Bit ADC

No Preview Available !

IMPORTANT LINKS for the AD7091R*
Last content update 11/13/2013 05:37 pm
PRODUCT RECOMMENDATIONS & REFERENCE DESIGNS
CN-0247:12-Bit ,1 MSPS SAR ADC and Driver with Total Power
Dissipation Less than 5 MILLIWATTS
DOCUMENTATION
AN-1141: Powering a Dual Supply Precision ADC with Switching
Regulators
AN-931: Understanding PulSAR ADC Support Circuitry
AN-877: Interfacing to High Speed ADCs via SPI
AN-935: Designing an ADC Transformer-Coupled Front End
AN-742: Frequency Domain Response of Switched-Capacitor ADCs
CN-0247: 12-Bit ,1 MSPS SAR ADC and Driver with Total Power
Dissipation Less than 5 mW
AD7091R Enables Power Budget Optimization (Video)
The Data Conversion Handbook
MT-031: Grounding Data Converters and Solving the Mystery of
MT-002: What the Nyquist Criterion Means to Your Sampled Data
System Design
MT-001: Taking the Mystery out of the Infamous Formula,
“SNR=6.02N + 1.76dB” and Why You Should Care
UG-409: Evaluation Board for the AD7091R Analog-to-Digital
Converter
MS-2124: Understanding AC Behaviors of High Speed ADCs
Nine Often Overlooked ADC Specifications
Analog Devices’ A/D Converter with Internal Reference Delivers
Lowest Power, Highest Accuracy and Smallest Package in its Class
SIMILAR PRODUCTS & PARAMETRIC SELECTION TABLES
Find Similar Products By Operating Parameters
Low Resolution - Single Channel Unipolar/Bipolar 8/10/12-Bit PulSAR
ADCs
SAR ADC & Driver Quick-Match Guide
DESIGN TOOLS, MODELS, DRIVERS & SOFTWARE
AD7091R IBIS Model
AD7091R IIO 1 MSPS Ultra Low Power ADC Linux driver
AD7091R - No-OS Driver for Renesas Microcontroller Platforms
AD7091R - No-OS Driver for Microchip Microcontroller Platforms
BeMicro FPGA Project for AD7091R with Nios driver
AD7091R FMC-SDP Interposer & Evaluation Board / Xilinx KC705
Reference Design
AD7091R Pmod Xilinx FPGA Reference Design
EVALUATION KITS & SYMBOLS & FOOTPRINTS
View the Evaluation Boards and Kits page for documentation and
purchasing
Symbols and Footprints
DESIGN COLLABORATION COMMUNITY
SUGGESTED COMPANION PRODUCTS
Recommended Driver Amplifiers for the AD7091R
For low frequency and low bias current, we recommend the
ADA4627-1, ADA4637-1 or the AD8610.
For precision, low power, rail-to-rail output, we recommend
the ADA4841-1, ADA4896-2 or the AD8031.
For high frequency, low noise, low distortion, we recommend
the ADA4899-1, ADA4897-1 or the AD8021.
For additional driver amplifier selections, we recommend
selecting the product category and filtering on our parametric
search tables.
Recommended External References for Vdd for the AD7091R
For a 3V, low power, low noise, we recommend the ADR4530
or the REF193.
For a 5V, low power, low noise, we recommend the ADR4550
or the REF195.
For additional voltage reference selections, we recommend
filtering on our parametric search tables.
Collaborate Online with the ADI support team and other designers
about select ADI products.
Follow us on Twitter: www.twitter.com/ADI_News
Like us on Facebook: www.facebook.com/AnalogDevicesInc
SAMPLE & BUY
AD7091R
View Price & Packaging
Request Evaluation Board
Request Samples
Check Inventory & Purchase
Find Local Distributors
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* This page was dynamically generated by Analog Devices, Inc. and inserted into this data sheet.
Note: Dynamic changes to the content on this page (labeled 'Important Links') does not
constitute a change to the revision number of the product data sheet.
This content may be frequently modified.
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Part Number AD7091R
Description 12-Bit ADC
Maker Analog Devices
Total Page 21 Pages
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