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AD7262:  1 MSPS, 12-Bit, Simultaneous Sampling SAR ADC with PGA and Four Comparators

The AD7262/AD7262-5 are dual, 12-bit, high speed, low power, successive approximation ADCs that operate from a single 5 V power supply. The AD7262 features throughput rates of up to 1 MSPS per on-chip ADC. The AD7262-5 features throughput rates of up to 500 kSPS. Two complete ADC functions allow simultaneous sampling and conversion of two channels. Each ADC is preceded by a true differential ...More

AD7262:  1 MSPS, 12-Bit, Simultaneous Sampling SAR ADC with PGA and Four Comparators

Product Description

The AD7262/AD7262-5 are dual, 12-bit, high speed, low power, successive approximation ADCs that operate from a single 5 V power supply. The AD7262 features throughput rates of up to 1 MSPS per on-chip ADC. The AD7262-5 features throughput rates of up to 500 kSPS. Two complete ADC functions allow simultaneous sampling and conversion of two channels. Each ADC is preceded by a true differential analog input with a PGA. There are 14 gain settings available: ×1, ×2, ×3, ×4, ×6, ×8, ×12, ×16, ×24, ×32, ×48, ×64, ×96, and ×128.

The AD7262/AD7262-5 contain four comparators. Comparator A and Comparator B are optimized for low power, while Compara-tor C and Comparator D have fast propagation delays. The AD7262/AD7262-5 feature a calibration function to remove any device offset error and programmable gain adjust registers to allow for input path (for example, sensor) offset and gain compensation. The AD7262/AD7262-5 have an on-chip 2.5 V reference that can be disabled if an external reference is preferred.

The AD7262/AD7262-5 are ideally suited for monitoring small amplitude signals from a variety of sensors. They include all the functionality needed for monitoring the position feedback signals from a variety of analog encoders used in motor control systems.

Product Highlights

  1. Integrated PGA with a variety of flexible gain settings to allow detection and conversion of low level analog signals.
  2. Each PGA is followed by a dual simultaneous sampling ADC, featuring throughput rates of 1 MSPS per ADC for the AD7262. The conversion results of both ADCs are simultaneously available on separate data lines or in succes-sion on one data line if only one serial port is available.
  3. Four integrated comparators that can be used to count signals from pole sensors in motor control applications.
  4. Internal 2.5 V reference.

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EVALUATION BOARDS & DEVELOPMENT KITS

  • Dual simultaneous sampling 12-bit, 2-channel ADC
  • True differential analog inputs
  • Programmable gain stage:
    ×1, ×2, ×3, ×4, ×6, ×8, ×12, ×16, ×24, ×32, ×48, ×64, ×96, ×128
  • Throughput rate per ADC
    1 MSPS for AD7262
    500 kSPS for AD7262-5
  • Analog input impedance: >1 GΩ
  • Wide input bandwidth
    −3 dB bandwidth: 1.7 MHz at gain = 2
  • 4 on-chip comparators
  • Please see data sheet for additional features
  • Resolution (Bits): 12bit
  • T-Put Rate: 1MSPS
  • # Chan: 2
  • Supply V: (+5An, +5Dig, +3.0Drv),(+5An, +5Dig, +3.3Drv),(+5An, +5Dig, +5Drv),Single(+5)
  • Pwr Diss: 120mW
  • Interface: Ser,SPI
  • Ain Range: (2Vref) p-p,5V p-p
  • SNR (dB): 73dB
  • Pkg Type: CSP,QFP

Functional Block Diagram for AD7262

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AD7352 12 3MSPS 2 45mW
AD7482 12 3MSPS 1 90mW
AD7492 12 1MSPS 1 15mW
AD7492-5 12 1.25MSPS 1 16.5mW
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AD9235-20 12 20MSPS 1 110mW
AD7476 12 1MSPS 1 17.5mW
AD7450 12 1MSPS 1 9mW
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*The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.
**Sample availability may be better than production availability. Please enter samples into your cart to check sample availability.