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AD7665:  16-Bit 570 kSPS Bipolar PulSAR® ADC

Product Status:Production
Data
Sheet
AD7665 Data Sheet Rev C, 02/2011 (pdf 612kB)

Product Details

Product Status:Production
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Based on the Pulsar core, the AD7665 is a 16-bit, 570 kSPS, 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 scalar, which allows various input ranges, an internal conversion clock, error correction circuits, and both serial and parallel system interface ports. The AD7665 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) and, for asynchronous conversion rate applications, a fast mode (Nor-mal) 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 with operation specified from -40°C to +85°C.

APPLICATIONS

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

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FEATURES and BENEFITS

  • Throughput
    570 kSPS (Warp Mode)
    500 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 @ 180 kHz
  • THD: –100 dB Typ @ 180 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
  • 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
    64 mW Typical
    15 µW @ 100 SPS

Functional Block Diagram for AD7665

AD7665 Diagram

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Documentation

Title Content Type File Type
AD7665: 16-Bit, 570 kSPS CMOS ADC Data Sheet  (Rev C, 02/2011) (pdf, 612 kB) Data Sheets 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-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-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
MS-2210: Designing Power Supplies for High Speed ADC  (pdf, 327 kB) Technical Articles PDF
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
High Speed, High Accuracy 14-Bit, 16-Bit, and 18-Bit PulSAR ADCs  (pdf, 3826 kB)
A PulSAR Family Brochure (6/2006) 		Overview PDF
When high performance and low power make the design, ADI converters make the difference. Overview HTML
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
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 Input Buffer Amplifiers for the AD7665

  • For high speed, low noise and low distortion, we recommend the AD8021, or the ADA4899-1.
  • For low frequency, low noise and low distortion, we recommend the AD8597 or the ADA4627.
Recommended Precison References - 2.5V for the AD7665
  • 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 wide supply applications, we recommend the AD780.
  • For cost sensitive applications, we suggest the AD1582 or the ADR391.
Recommended Voltage Regulators for the AD7665
  • For low dropout regulators with inputs up to 5V, we recommend the low noise ADP151 or the low power ADP160.
  • For high current switching regulators with inputs up to 5V, we recommend the low noise ADP2114.
Recommended Power Solutions

  • For selecting voltage regulator products, use ADIsimPower.
  • For selecting supervisor products, use the Supervisor Parametric Search.

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    Price, packaging, availability

    AD7665 Model Options
    Model Package Pins Temp.
    Range         		Packing,
    Qty         		Price*(100-499) Price*1000 pcs RoHS View PCN/ PDN Check Inventory/
    Purchase/Sample
    AD7665ACPZ Status: Production 48 ld LFCSP 7x7mm (5.25EP) 48 Ind Tray, 260 $21.26 $19.23 Y  Material Info Notify Me Purchase
    AD7665ACPZRL Status: Production 48 ld LFCSP 7x7mm (5.25EP) 48 Ind Reel, 2500 - $19.23 Y  Material Info Notify Me Purchase
    AD7665ASTZ Status: Production 48 ld LQFP 48 Ind Tray, 250 $21.26 $19.23 Y  Material Info PCN Purchase Sample
    AD7665ASTZRL Status: Production 48 ld LQFP 48 Ind Reel, 2000 - $19.23 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.

    AD7665 Evaluation Kit
    Model Description Price RoHS View PCN/ PDN Check Inventory/
    Purchase/Sample
    EVAL-AD7665EDZ 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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