The AD7266 is a dual, 12-bit, high speed, low power, successive approximation ADC that operates from a single 2.7 V to 5.25 V power supply and features throughput rates up to 2 MSPS. The device contains two ADCs, each preceded by a 3-channel multiplexer, and a low noise, wide bandwidth track-and-hold amplifier that can handle input frequencies in excess of 30 MHz.
The conversion process and data acquisition use standard control inputs allowing easy interfacing to microprocessors or DSPs. The input signal is sampled on the falling edge of CS; conversion is also initiated at this point. The conversion time is determined by the SCLK frequency. There are no pipelined delays associated with the part.
The AD7266 uses advanced design techniques to achieve very low power dissipation at high throughput rates. With 5 V supplies and a 2 MSPS throughput rate, the part consumes 6.2 mA maximum. The part also offers flexible power/throughput rate management when operating in normal mode as the quiescent current consumption is so low.
The analog input range for the part can be selected to be a 0 V to VREF (or 2 × VREF) range, with either straight binary or twos complement output coding. The AD7266 has an on-chip 2.5 V reference that can be overdriven when an external reference is preferred. This external reference range is 100 mV to VDD.
|Title||Content Type||File Type|
|AD7266: Differential/Single-Ended Input, Dual 2 MSPS, 12-Bit, 3-Channel SAR ADC Data Sheet (Rev B, 05/2011) (pdf, 682 kB)||Data Sheets|
|AN-1141: Powering a Dual Supply Precision ADC with Switching Regulators (pdf, 640 kB)||Application Notes|
AN-931: Understanding PulSAR ADC Support Circuitry
(pdf, 299 kB)
This application note discusses in general the pitfalls that occur regularly when using SAR ADCs and, more importantly, how to easily prevent them.
|AN-932: Power Supply Sequencing (pdf, 95 kB)||Application Notes|
|AN-877: Interfacing to High Speed ADCs via SPI (pdf, 1594 kB)||Application Notes|
|AN-935: Designing an ADC Transformer-Coupled Front End (pdf, 363 kB)||Application Notes|
|AN-742: Frequency Domain Response of Switched-Capacitor ADCs (pdf, 401 kB)||Application Notes|
|CN-0187: Crest Factor, Peak, and RMS RF Power Measurement Circuit Optimized for High Speed, Low Power, and Single 3.3 V Supply (pdf, 163 kB)||Circuit Note|
|CN-0039: AD7266 SAR ADC in DC-Coupled Differential and Single-Ended Applications (pdf, 109 kB)||Circuit Note|
|The Data Conversion Handbook||Design Handbooks||HTML|
|MT-031: Grounding Data Converters and Solving the Mystery of (pdf, 144 kB)||Tutorials|
|MT-002: What the Nyquist Criterion Means to Your Sampled Data System Design (pdf, 152 kB)||Tutorials|
|MT-001: Taking the Mystery out of the Infamous Formula, "SNR=6.02N + 1.76dB," and Why You Should Care (pdf, 94 kB)||Tutorials|
|MS-2210: Designing Power Supplies for High Speed ADC (pdf, 327 kB)||Technical Articles|
|MS-2022: Seven Steps to Successful Analog-to-Digital Signal Conversion (Noise Calculation for Proper Signal Conditioning) (pdf, 277 kB)||Technical Articles|
|MS-2124: Understanding AC Behaviors of High Speed ADCs (pdf, 276 kB)||Technical Articles|
Nine Often Overlooked ADC Specifications
(pdf, 445 kB)
Analog-to-digital converters (ADCs) have many specifications; some are more important for a given application than others. Understanding these specifications and controlling external devices affecting the ADC will lead to better performance.
Choosing an A/D Converter for Motor Control Apps
Designers must solve challenges associated with current and voltage monitoring, optical encoder feedback, and resolver-to-digital conversion (Electronic Products, 5/2004)
Data-Converter Trio Zeroes In On High-Level Motor Control
(Electronic Design, 3/1/3005)
|Dual-Supply, High-Precision Operational Amplifier Designed for Front-End Amplifier Applications (19 Dec 2012)||Press Releases||HTML|
Converters for Motor Control
(pdf, 929 kB)
Higher performance, greater accuracy and speed, and ultralow power consumption highlight Analog Devices’ portfolio of data converters for motor control. Each delivers optimum quality signals to/from the real world and processes the data with less development time, fewer parts, and lower costs.
|RAQs index||Rarely Asked Questions||HTML|
|Glossary of EE Terms||Glossary||HTML|
|Title||Content Type||File Type|
|BeMicro FPGA Project for CN0187 with Nios driver||FPGA HDL||HTML|
|CN0187 FMC-SDP Interposer & Evaluation Board / Xilinx KC705 Reference Design||FPGA HDL||HTML|
|AD7266 Differential/Single-Ended Input, Dual, Simultaneous Sampling, 2 MSPS, 12-Bit, 3-Channel SAR A/D Converter Linux Driver||Device Drivers||HTML|
Recommended Digital Isolators for the AD7266
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