content here.
content here.

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

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. ...More

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

Product Description

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.

RESOURCES & TOOLS

What is your task? Try Lead the Way AdvisorTM BETA
Eb

EVALUATION BOARDS & DEVELOPMENT KITS

  • 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
  • Resolution (Bits): 24bit
  • T-Put Rate: 16kSPS
  • # Chan: 2
  • Supply V: Multi(±5, +5 logic)
  • Pwr Diss: 96mW
  • Interface: Byte,Ser
  • Ain Range: Bip 2.25V/(PGA Gain)
  • SNR (dB): 120dB
  • Pkg Type: LCC

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.

Similar Products

arrow View Full Interactive Product Selection Table
Part# Bits Throughput Rate # of Inputs Operating Pwr Diss
AD9874 24 541.5KSPS 1 79.5mW
AD7766 24 128KSPS 1 18mW
AD7767 24 128KSPS 1 18mW
AD7357 14 4.25MSPS 2 36mW
AD7367-5 14 500KSPS 2 54.5mW
AD9251-20 14 20MSPS 2 86.5mW
AD7366-5 12 500KSPS 2 54.5mW
AD7321 13 500KSPS 2 17mW
AD7922 12 1MSPS 2 15mW
AD7322 13 1MSPS 2 30mW
AD7352 12 3MSPS 2 45mW
back to top

Pricing, Packaging & Availability

Print Table
back to top

Help

Model
The model number is a specific version of a generic that can be purchased or sampled.

Status
Status indicates the current lifecycle of the product. This can be one of 4 stages:
  • Pre-Release: The model has not been released to general production, but samples may be available.
  • Production: The model is currently being produced, and generally available for purchase and sampling.
  • Last Time Buy: The model has been scheduled for obsolescence, but may still be purchased for a limited time.
  • Obsolete: The specific part is obsolete and no longer available. Other models listed in the table may still be available (if they have a status that is not obsolete).
Package Description
The package for this IC (i.e. DIP, SOIC, BGA). An Evaluation Board is a board engineered to show the performance of the model, the part is included on the board.

For detailed drawings and chemical composition please consult our  Package Site

Pin Count
Pin Count is the number of pins, balls, or pads on the device. Pin-out diagrams & pin function descriptions may be found in the datasheet.

Temperature Range
This is the acceptable operating range of the device. The various ranges specified are as follows:
  • Commercial: 0 to +70 degrees Celsius
  • Military : -55 to +125 degrees Celsius
  • Industrial: Temperature ranges may vary by model. Please consult the datasheet for more information.
  • Automotive: -40 to +125 degrees Celsius
Price
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.

Production Availability
This is the date Analog Devices, Inc. anticipates that the product will ship from the warehouse. Most orders ship within 48 hours of this date.Once an order has been placed, Analog Devices, Inc. will send an Order Acknowledgement email to confirm your delivery date. It is important to note the scheduled dock date on the order entry screen. We do take orders for items that are not in stock, so delivery may be scheduled at a future date. Also, please note the warehouse location for the product ordered. We have warehouses in the United States, Europe and Southeast Asia. Transit times from these sites may vary.
Sample availability may be better than production availability. Please enter samples into your cart to check sample availability.

RoHS Compliant
Due to environmental concerns, ADI offers many of our products in lead-free versions. For more information about lead-free parts, please consult our Pb (Lead) free information page.

View PCN
This is the list of Product Change Notifications (PCN) published on the web for this model. Click on the link to access PCN Information.Only select pre-2009 PCN�s are available on-line. To obtain a pre-2009 PCN, contact your ADI Sales Rep. For more information on ADI's PCN process, please visit our PCN Policy Statement page

*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.