AD7266
Differential/Single-Ended Input, Dual, Simultaneous Sampling, 2 MSPS, 12-Bit, 3-Channel SAR A/D Converter
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Overview
Features and Benefits
- Dual 12-bit, 3-channel ADC
- Throughput rate: 2 MSPS
- Specified for VDD of 2.7 V to 5.25 V
- Power consumption:
- 9 mW at 1.5 MSPS with 3 V supplies
- 27 mW at 2 MSPS with 5 V supplies
- Pin-configurable analog inputs
- 12-channel single-ended inputs
- 6-channel fully differential inputs
- 6-channel pseudo differential inputs
- 70 dB SNR at 50 kHz input frequency
- Accurate on-chip reference: 2.5 V
- ±0.2% maximum @ 25°C, 20 ppm/°C maximum
- Dual conversion with read 437.5 ns, 32 MHz SCLK
- High speed serial interface
- SPI®-/QSPI™-/MICROWIRE&trade-/DSP-compatible
- −40°C to +125°C operation
- Shutdown mode: 1 μA maximum
- 32-lead LFCSP and 32-lead TQFP
- 1 MSPS version, AD7265
Product Details
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.
PRODUCT HIGHLIGHTS
- Two Complete ADC Functions Allow Simultaneous Sampling and Conversion of Two Channels. Each ADC has three fully/pseudo differential pairs, or six single-ended channels, as programmed. The conversion result of both channels is simultaneously available on separate data lines, or in succession on one data line if only one serial port is available.
- High Throughput with Low Power Consumption. The AD7266 offers a 1.5 MSPS throughput rate with 11.4 mW maximum power dissipation when operating at 3 V.
- The AD7266 offers both a standard 0 V to VREF input range and a 2 × V input range.
- No Pipeline Delay. The part features two standard successive approximation ADCs with accurate control of the sampling instant via a CS input and once off conversion control.
Product Lifecycle
Production
At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.
Evaluation Kits (1)
Documentation & Resources
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AN-1499: AD7266 SAR ADC in DC-Coupled Differential and Single-Ended Applications (Rev. B)11/14/2017PDF110 K
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AN-742: Frequency Domain Response of Switched-Capacitor ADCs (Rev. C)2/14/2015PDF427 K
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AN-931: Understanding PulSAR ADC Support Circuitry (Rev. 0)2/14/2015PDF299 kB
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The Data Conversion Handbook, 20051/2/2005
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MT-002: What the Nyquist Criterion Means to Your Sampled Data System Design2/14/2015PDF152 kB
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MT-031: Grounding Data Converters and Solving the Mystery of "AGND" and "DGND"3/20/2009PDF144 kB
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SAR ADC & Driver Quick-Match Guide9/13/2013PDF251 kB
Software & Systems Requirements
Tools & Simulations
IBIS Models
IBS
AD7266 IBIS Model
39.69 K
Reference Designs (1)
Product Recommendations
AD7266 Companion Parts
Recommended Driver Amplifiers
- For precision, low power, low distortion applications: ADA4841-1, ADA4932-1.
- For high frequency, low noise, low distortion applications: AD8022, ADA4897-1, ADA4899-1.
- For low frequency, precision, low bias current: ADA4627-1, ADA4000-2, ADA4610-2.
Recommended External Voltage References - 2.5V
Design Resources
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal.
PCN-PDN Information
Support & Discussions
AD7266 Discussions
RE: ADRV9002 Kernel Module Support
8 week(s) ago in Linux Software Drivers
Sample & Buy
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Evaluation Boards
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Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.