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AD7671:  16-Bit, 1 MSPS CMOS ADC

Product Details


The AD7671 is a 16-bit, 1 MSPS, charge redistribution SAR, analog-to-digital converter that operates from a single 5 V power supply. It contains a high speed 16-bit sampling ADC, a resistor input scaler that allows various input ranges, an internal conversion clock, error correction circuits, and both serial and parallel system interface ports.

The AD7671 is hardware factory-calibrated and is comprehensively tested to ensure such ac parameters as signal-to-noise ratio (SNR) and total harmonic distortion (THD), in addition to the more traditional dc parameters of gain, offset, and linearity.

It features a very high sampling rate mode (Warp), a fast mode (Normal) for asynchronous conversion rate applications, and, for low power applications, a reduced power mode (Impulse) where the power is scaled with the throughput.

It is fabricated using Analog Devices’ high performance, 0.6 micron CMOS process and is available in a 48-lead LQFP and a tiny 48-lead LFCSP, with operation specified from –40°C to +85°C.

Product Highlights

  1. Fast Throughput
    The AD7671 is a very high speed (1 MSPS in Warp Mode and 800 kSPS in Normal Mode), charge redistribution, 16-bit SAR ADC.
  2. Single-Supply Operation
    The AD7671 operates from a single 5 V supply, dissipates only 112 mW typical, even lower when a reduced throughput is used with the reduced power mode (Impulse) and a powerdown mode.
  3. Superior INL
    The AD7671 has a maximum integral nonlinearity of 2.5 LSB with no missing 16-bit code.
  4. Serial or Parallel Interface
    Versatile parallel (8 bits or 16 bits) or 2-wire serial interface arrangement compatible with both 3 V or 5 V logic.

Applications

  • Data Acquisition
  • Communication
  • Instrumentation
  • Spectrum Analysis
  • Medical Instruments
  • Process Control

FEATURES and BENEFITS

  • Chinese data sheet available
  • Throughput
    1 MSPS (Warp Mode)
    800 kSPS (Normal Mode)
  • INL: ±2.5 LSB Max (±0.0038% of Full Scale)
  • 16-Bit Resolution with No Missing Codes
  • S/(N+D): 90 dB Typ @ 250 kHz
  • Analog Input Voltage Ranges Bipolar: ±10 V, ±5 V, ±2.5 V
    Unipolar: 0 V to 10 V, 0 V to 5 V, 0 V to 2.5 V
  • THD: –100 dB Typ @ 250 kHz
  • Both AC and DC Specifications
  • No Pipeline Delay
  • Parallel (8/16 Bits) and Serial 5 V/3 V Interface
  • SPI®/QSPI™/MICROWIRE™/DSP Compatible
  • Single 5 V Supply Operation
  • Power Dissipation
    112 mW Typical
    15 µW @ 100 SPS

Functional Block Diagram for AD7671

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Documentation

Title Content Type File Type
AD7671: 16-Bit, 1 MSPS CMOS ADC Data Sheet  (Rev C, 04/2012) (pdf, 660 kB) Data Sheets PDF
AN-1141: Powering a Dual Supply Precision ADC with Switching Regulators  (pdf, 640 kB) Application Notes PDF
AN-931: Understanding PulSAR ADC Support Circuitry  (pdf, 299 kB)
This application note discusses in general the pitfalls that occur regularly when using SAR ADCs and, more importantly, how to easily prevent them.
Application Notes PDF
AN-932: Power Supply Sequencing  (pdf, 95 kB) Application Notes PDF
AN-877: Interfacing to High Speed ADCs via SPI  (pdf, 1594 kB) Application Notes PDF
AN-935: Designing an ADC Transformer-Coupled Front End  (pdf, 363 kB) Application Notes PDF
AN-742: Frequency Domain Response of Switched-Capacitor ADCs  (pdf, 401 kB) Application Notes PDF
AN-594: Modifying the Input Voltage Range of the AD7663, AD7665 or AD7671 PulSAR 16-Bit ADCs  (pdf, 141 kB)
These ADCs handle other input voltage ranges not described in the data sheet.
Application Notes PDF
The Data Conversion Handbook Design Handbooks HTML
MT-031: Grounding Data Converters and Solving the Mystery of  (pdf, 144 kB) Tutorials PDF
MT-002: What the Nyquist Criterion Means to Your Sampled Data System Design  (pdf, 152 kB) Tutorials PDF
MT-001: Taking the Mystery out of the Infamous Formula, "SNR=6.02N + 1.76dB," and Why You Should Care  (pdf, 94 kB) Tutorials PDF
MS-2210: Designing Power Supplies for High Speed ADC  (pdf, 327 kB) Technical Articles PDF
MS-2022: Seven Steps to Successful Analog-to-Digital Signal Conversion (Noise Calculation for Proper Signal Conditioning)  (pdf, 277 kB) Technical Articles PDF
MS-2124: Understanding AC Behaviors of High Speed ADCs  (pdf, 276 kB) Technical Articles PDF
Nine Often Overlooked ADC Specifications  (pdf, 445 kB)
Analog-to-digital converters (ADCs) have many specifications; some are more important for a given application than others. Understanding these specifications and controlling external devices affecting the ADC will lead to better performance.
Technical Articles PDF
The 1 MSPS Successive Approximation Register A/D Converter
by Bhaskar Banerjee
...Combining a higher sampling rate and lower power consumption, this 16-bit A/D converter is turning heads in the data acquisition market.
(Sensors, December 2001)
Technical Articles HTML
Analog Devices Introduces Industry's Fastest 16-Bit SAR Converter Offering Unparalleled Speed And Precision  (htm)
by Paul O'Shea
(ChipCenter, June 20, 2001)
Technical Articles HTM
Sampling ADC Breaks Speed Barrier Without Compromising Power
by Ashok Bindra
...An innovative comparator helps this 16-bit successive-approximation-register ADC set a conversion speed record at 1 Msample/s
(Electronic Design, May 21, 2001)
Technical Articles HTML
High Speed Op Amp Drives a 16-Bit, 1-MSPS Differential-Input A/D Converter
(Analog Dialogue, Vol. 36, No. 6, November/December 2002)
Analog Dialogue HTML
Ask the Applications Engineer-27: What problems am I most likely to run into when instrumenting an industrial system?
(Analog Dialogue, Vol. 33, No. 2, February, 1999)
Analog Dialogue HTML
SAR ADC & Driver Quick-Match Guide  (pdf, 251 kB)
Find drivers for ADI's most popular single-ended and differential SAR ADCs based on your specific application conditions.
Product Selection Guide PDF
8- to 18-Bit SAR ADCs ... From the Leader in High Performance Analog  (pdf, 1885 kB)
8- to 18-Bit SAR ADCs with Sample Rates up to 3 MSPS -- The latest additions to ADI’s ADC portfolio offer unrivaled functionality in terms of channel count and power supply voltage, optimal power/speed ratios, and the smallest packages to meet the demands of any data acquisition application, including portable, industrial, medical, wireless, and communications.
Overview PDF
High Speed, High Accuracy 14-Bit, 16-Bit, and 18-Bit PulSAR ADCs  (pdf, 3826 kB)
A PulSAR Family Brochure (6/2006)
Overview PDF
RAQs index Rarely Asked Questions HTML
Glossary of EE Terms Glossary HTML

Evaluation Kits & Symbols & Footprints

Evaluation Boards & KitsView the Evaluation Boards and Kits page for documentation and purchasing

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.

Product Recommendations & Reference Designs

Companion Products

Suggested Companion Products


Recommended Driver Amplifiers for the AD7671 Recommended External Voltage References for the AD7671
  • For applications requiring the lowest noise performance and output trim adjust, we recommend the ADR441.
  • For high output current applications, we recommend the ADR431 or the REF192.
  • For cost sensitive applications, we suggest the AD1582 or the ADR391.
Recommended Power Solutions

  • For selecting voltage regulator products, use ADIsimPower.

Were these recommendations helpful?

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Price, packaging, availability

AD7671 Model Options
Model Package Pins Temp.
Range
Packing,
Qty
Price*(100-499) Price*1000 pcs RoHS View PCN/ PDN Check Inventory/
Purchase/Sample
AD7671ACPZ Status: Production 48 ld LFCSP 7x7mm (5.25EP) 48 Ind Tray, 260 $31.29 $28.29 Y  Material Info PCN Purchase Sample
AD7671ASTZ Status: Production 48 ld LQFP 48 Ind Tray, 250 $31.29 $28.29 Y  Material Info PCN Purchase Sample
AD7671ASTZRL Status: Production 48 ld LQFP 48 Ind Reel, 2000 - $28.29 Y  Material Info PCN 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.

AD7671 Evaluation Board
Model Description Price RoHS View PCN/ PDN Check Inventory/
Purchase/Sample
EVAL-AD7671EDZ Status: Production Evaluation Board $99.00 Yes -
EVAL-CED1Z Status: Production Evaluation Controller Board $249.00 Yes -

Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.

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