1 MSPS, Ultralow Power, 12-Bit ADC in 10-Lead LFCSP and MSOP Data Sheet AD7091R FEATURES FUNCTIONAL BLOCK DIAGRAM REGCAP REF /REF V IN OUT DD Fast throughput rate of 1 MSPS Specified for V of 2.7 V to 5.25 V DD 2.5V AD7091R Logic voltage V of 1.65 V to 5.25 V DRIVE REF INL of 1 LSB maximum SDO Analog input range of 0 V to V REF SCLK SERIAL 12-BIT V T/H IN INTERFACE SAR Ultralow power CS V 349 A typical at 3 V and 1 MSPS DRIVE 264 nA typical at 3 V in power-down mode CLK OSC Internal 2.5 V reference, 4.5 ppm/C typical drift CONVERSION CONTROL LOGIC CONVST Wide input bandwidth Flexible power/throughput rate management GND High speed serial interface Figure 1. SPI/QSPI/MICROWIRE/DSP compatible BUSY indicator The AD7091R uses advanced design and process techniques to Power-down mode achieve very low power dissipation at high throughput rates. An 10-lead, 3 mm 2 mm LFCSP and 10-lead MSOP packages on-chip, accurate 2.5 V reference is available. Temperature range of 40C to +125C 1100 V = V = 3V V = V = 3V DD DRIVE DD DRIVE 1000 APPLICATIONS 900 Battery-powered systems 800 Handheld meters 700 Medical instruments 600 Mobile communications 500 Instrumentation and control systems V DD Data acquisition systems 400 Optical sensors 300 Diagnostic/monitoring functions 200 Energy harvesting 100 V DRIVE 0 GENERAL DESCRIPTION 0 200 400 600 800 1000 THROUGHPUT RATE (kSPS) The AD7091R is a 12-bit successive approximation analog-to- digital converter (ADC) that offers ultralow power consumption Figure 2. Power vs. Throughput Rate (typically 349 A at 3 V and 1 MSPS) while achieving fast PRODUCT HIGHLIGHTS throughput rates (1 MSPS with a 50 MHz SCLK). Operating 1. Lowest Power 12-Bit SAR ADC Available. from a single 2.7 V to 5.25 V power supply, the part contains a 2. On-Chip, Accurate 2.5 V Reference. wide bandwidth track-and-hold amplifier that can handle input 3. High Throughput Rate with Ultralow Power Consumption. frequencies in excess of 7 MHz. The AD7091R also features an 4. Flexible Power/Throughput Rate Management. on-chip conversion clock, accurate reference, and high speed Average power scales with the throughput rate. Power-down serial interface. mode allows the average power consumption to be reduced The conversion process and data acquisition are controlled using when the device is not performing a conversion. CONVST a signal and an internal oscillator. The AD7091R has 5. Single Supply Operation with V Function. DRIVE a serial interface that allows data to be read after the conversion The AD7091R operates from a single 2.7 V to 5.25 V supply. while achieving a 1 MSPS throughput rate. The VDRIVE function allows the serial interface to connect directly to 1.8 V to 3.3 V processors. Rev. B 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 One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. rights of third parties that may result from its use. Specifications subject to change without notice. No Tel: 781.329.4700 20122016 Analog Devices, Inc. All rights reserved. license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarks and registered trademarks are the property of their respective owners. Technical Support www.analog.com POWER (W) 10494-001 10494-002AD7091R Data Sheet TABLE OF CONTENTS Features .............................................................................................. 1 Circuit Information .................................................................... 12 Applications ....................................................................................... 1 Converter Operation .................................................................. 12 General Description ......................................................................... 1 ADC Transfer Function ............................................................. 12 Functional Block Diagram .............................................................. 1 Internal/External Voltage Reference ........................................ 12 Product Highlights ........................................................................... 1 Typical Connection Diagram ................................................... 13 Revision History ............................................................................... 2 Analog Input ............................................................................... 13 Specif icat ions ..................................................................................... 3 Modes of Operation ................................................................... 14 Timing Specifications .................................................................. 5 Power Consumption .................................................................. 14 Absolute Maximum Ratings ............................................................ 6 Serial Interface ................................................................................ 16 Thermal Resistance ...................................................................... 6 With BUSY Indicator ................................................................. 16 ESD Caution .................................................................................. 6 Without BUSY Indicator ........................................................... 17 Pin Configuration and Function Descriptions ............................. 7 Software Reset ............................................................................. 18 Typical Performance Characteristics ............................................. 8 Interfacing With 8-/16-Bit SPI ................................................. 18 Terminology .................................................................................... 11 Outline Dimensions ....................................................................... 20 Theory of Operation ...................................................................... 12 Ordering Guide .......................................................................... 20 REVISION HISTORY 9/2016Rev. A to Rev. B 8/2012Revision 0: Initial Version Changes to Signal-to-Noise Ratio (SNR) Parameter and Integral Nonlinearity Parameter, Table 1 ..................................................... 3 Deleted Note 3, Table 1 .................................................................... 3 5/2015Rev. 0 to Rev. A Changes to Serial Interface Section .............................................. 16 Rev. B Page 2 of 20