AD7641:  18-Bit, 2 MSPS SAR ADC

The AD7641 is a 18-bit, 2 MSPS, charge redistribution SAR, fully differential analog-to-digital converter that operates from a single 2.5 V power supply. The part contains a high-speed 18-bit sampling ...More

AD7641:  18-Bit, 2 MSPS SAR ADC

Product Description

The AD7641 is a 18-bit, 2 MSPS, charge redistribution SAR, fully differential analog-to-digital converter that operates from a single 2.5 V power supply. The part contains a high-speed 18-bit sampling ADC, an internal conversion clock, an internal reference buffer, error correction circuits, and both serial and parallel system interface ports. It features a very high sampling rate mode (Warp) and a fast mode (Normal) for asynchronous conversion rate applications.

The AD7641 is hardware factory calibrated and comprehensively tested to ensure ac parameters such as signal-to-noise ratio (SNR) and total harmonic distortion (THD) in addition to the more traditional dc parameters of gain, offset and linearity.

Operation is specified from −40°C to +85°C.

Applications

  • Medical instruments
  • High dynamic data acquisition
  • Instrumentation
  • Spectrum analysis
  • ATE

Features

  • 18-bit resolution with no missing codes
  • 2.5 V internal low drift reference
  • Throughput:
    2 MSPS (Warp mode)
    1.5 MSPS (Normal mode)
  • Differential input range: ± VREF
    (VREF up to 2.5 V)
  • INL: ±2 LSB typical
  • No pipeline delay ( SAR architecture )
  • Parallel (18-, 16-, or 8-bit bus)
  • Serial 5 V/3.3 V/2.5 V interface
  • SPI®/QSPI™/MICROWIRE™/DSP compatible
  • On-board low drift reference with buffer and temperature sensor

Diagrams

AD7641 Diagram
Functional Block Diagram for AD7641

Specifications

Resolution (Bits) 18bit
T-Put Rate 2MSPS
# Chan 1
Supply V Single(+2.5)
Pwr Diss 92mW
Interface Byte,Par,Ser,SPI
Ain Range (2Vref) p-p
SNR (dB) 93.5dB
Pkg Type CSP,QFP

AD7357 - Differential Input, Dual, Simultaneous Sampling, 4.25 MSPS, 14-Bit, SAR ADC

AD7949 - 14-Bit, 8-Channel, 250 kSPS PulSAR® ADC

AD7781 - 20-Bit, Pin-Programmable, Ultralow Power Sigma-Delta ADC

AD7780 - 24-Bit Pin-Programmable Low Power Σ−Δ ADC

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Part# Bits Throughput Rate # of Inputs Operating Pwr Diss
AD7641 18 2MSPS 1 92mW
AD7621 16 3MSPS 1 86mW
AD7622 16 2MSPS 1 85mW
AD7400 16 10MSPS 1 90mW
AD7484 14 3MSPS 1 90mW
AD7482 12 3MSPS 1 90mW
AD7276 12 3MSPS 1 19.8mW
AD7277 10 3MSPS 1 19.8mW
AD7278 8 3MSPS 1 19.8mW
AD7822 8 2MSPS 1 60mW
AD775 8 20MSPS 1 85mW
Pricing, Packaging & Availability

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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.

*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.

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