Features and Benefits

  • Fourth Order Σ-Δ Modulator
  • Large Dynamic Range
    116 dB Min, 120 dB Typical @ 1 ms
    117 dB Typical @ 0.5 ms
  • Low Input Noise: 80 nV rms @ 4 ms with Gain of 34,128
  • Low Distortion: –111 dB Max, –120 dB Typical
  • Low Intermodulation: 122 dB
  • Sampling Rate at 256 kSPS
  • Very High Jitter Tolerance
  • No External Antialias Filter Required
  • Programmable Gain Front End
  • Input Range: ±2.25 V
  • Robust Inputs
  • Gain Settings: 1, 2.5, 8.5, 34, 128

Product Details

The AD1555 is a complete sigma-delta modulator, combined with a programmable gain amplifier, intended for low frequency, high dynamic range measurement applications. The AD1555 outputs a ones-density bit stream proportional to the analog input. When used in conjunction with the AD1556 digital filter/decimator, the industry's highest performance ADC at a bandwidth of 1+ kHz is realized.

The continuous-time analog modulator input architecture avoids the need for an external anti-alias filter. The programmable gain front end simplifies system design, extends the dynamic range, and reduces system board area. Low operating power and standby modes makes the AD1555 ideal for remote battery-powered data acquisition systems.

Product Lifecycle icon-recommended 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.

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.

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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.

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