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AD1555:  24-Bit, 121 dB typical SNR, Sigma-Delta A/D converter with Integrated PGA

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.

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

Functional Block Diagram for AD1555

Of Note ...

ADI does not recommend this part for new designs. The recommended replacement parts are AD7766 and AD7767.
Customer Notice: If ordering the evaluation board for the AD1555 or AD1556 (Eval-AD1555/56EB), please note that software is only compatible with Windows 95 and 98.

Documentation

Title Content Type File Type
AD1555/AD1556: 24-Bit Sigma-Delta ADC Data Sheet  (Rev B, 05/2002) (pdf, 429 kB) Data Sheets PDF
AN-101: Cross Plot Generator Allows Quick A/D Converter Evaluation  (pdf, 280 kB) Application Notes PDF
AN-347: Shielding and Guarding  (pdf, 688 kB)
How to Exclude Interference-Type Noise. What to do and Why to do it-A Rational Approach
Application Notes PDF
AN-214: Ground Rules for High Speed Circuits  (pdf, 356 kB)
Layout and Wiring Are Critical in Video Converter Circuits.
Application Notes PDF
AN-566: A Geophone/Hydrophone Acquisition Reference Design  (pdf, 211 kB)
The AD1555/AD1556 24-Bit Sigma-Delta ADC Chipset Provides for Direct Acquisition of High Dynamic Range Sensors.
Application Notes PDF
MS-2210: Designing Power Supplies for High Speed ADC  (pdf, 327 kB) Technical Articles PDF
RAQs index Rarely Asked Questions HTML
Glossary of EE Terms Glossary HTML

Evaluation Kits & Symbols & Footprints

Symbols and Footprints— Analog Devices offers Symbols & Footprints which are compatible with a large set of today’s CAD systems for broader and easier support.

SampleSample & Buy

Price, packaging, availability

AD1555 Model Options
Model Package Pins Temp.
Range
Packing,
Qty
Price*(100-499) Price*1000 pcs RoHS View PCN/ PDN Check Inventory/
Purchase/Sample
AD1555AP Status: Production PLCC:PLASTIC LEAD CHIP CAR 28 Ind Tube, 39 $100.11 $90.48 N  Material Info PCN Purchase
AD1555APRL Status: Last Time Buy PLCC:PLASTIC LEAD CHIP CAR 28 Ind Reel, 750 - $90.48 N  Material Info PCN/PDN Purchase
AD1555APZ Status: Production PLCC:PLASTIC LEAD CHIP CAR 28 Ind Tube, 39 $82.54 $74.61 Y  Material Info Notify Me Purchase
AD1555APZRL Status: Last Time Buy PLCC:PLASTIC LEAD CHIP CAR 28 Ind Reel, 750 $82.54 $74.61 Y  Material Info PDN Purchase
AD1555BP Status: Production PLCC:PLASTIC LEAD CHIP CAR 28 Ind Tube, 39 $130.40 $117.89 N  Material Info PCN Purchase
AD1555BPZ Status: Production PLCC:PLASTIC LEAD CHIP CAR 28 Ind Tube, 39 $107.53 $97.20 Y  Material Info Notify Me Purchase
AD1555BPZRL Status: Last Time Buy PLCC:PLASTIC LEAD CHIP CAR 28 Ind Reel, 750 $107.53 $97.20 Y  Material Info PDN Purchase
Price Table Help

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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