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 ...続きを見る

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

製品概要

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.

Features

  • 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

Diagrams

AD7262 Diagram
Functional Block Diagram for AD7262

仕様

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 (max) 175mW
Interface Ser,SPI
Ain Range (2Vref) p-p,5V p-p
SNR (dB) 73dB
Pkg Type CSP,QFP

その他の製品を探す

AD9230-11 - 11-Bit, 200 MSPS, 1.8 V Analog-to-Digital Converter

AD7352 - Differential Input, Dual, Simultaneous Sampling, 3 MSPS, 12-Bit, SAR ADC

AD7699 - 16-Bit, 8-Channel, 500 kSPS PulSAR ADC

AD7190 - 4.8 kHz Ultra-Low Noise 24-Bit Sigma-Delta ADC with PGA

新製品情報のRSSフィードを取得 続きを見る
Part# Res Throughput Rate # of Inputs Operating Pwr Diss
AD7262 12 1MSPS 2 175mW
AD7352 12 3MSPS 2 45mW
AD7356 12 5MSPS 2 59mW
AD7922 12 1MSPS 2 15mW
AD9237-20 12 20MSPS 1 120mW
AD7276 12 3MSPS 1 19.8mW
AD9223 12 3MSPS 1 130mW