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AD7739:  8-Channel, 4 kHz, 24-Bit Sigma-Delta A/D Converter

Product Status:Production
Data
Sheet
AD7739 Data Sheet Rev 0, 05/2003 (pdf 380kB)

Product Details

Product Status:Production
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The AD7739 is a high precision, high throughput analog front end. True 16-bit peak-to-peak resolution is achievable with a total conversion time of 250 µs (4 kHz channel switching) making it ideally suitable for high resolution multiplexing applications.

The AD7739 is based on a sigma-delta architecture and features up to 24 bits of no missing codes performance. The part can be configured via a simple digital interface, which allows users to balance the noise performance against data throughput up to a 15.4 kHz conversion rate. The analog front end features 8 single-ended or 4 fully differential input channels with unipolar or bipolar 625 mV, 1.25 V and 2.5 V input ranges and accepts a common mode input voltage from 200 mV above AGND to AVDD-300 mV. The ADC supports per channel system calibration options.

The digital serial interface can be configured for three-wire operation and is compatible with microcontrollers and digital signal processors. All interface inputs are Schmitt triggered.

The part is specified for operation over the extended industrial temperature range of -40ºC to +105ºC and is available in 24-lead TSSOP package.

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FEATURES and BENEFITS

  • High resolution ADC
    - 24 bits no missing codes
    - ±0.0015% Nonlinearity
  • Optimized for Fast Channel Switching
    - 18-Bits p-p Resolution (21 Bits Effective) at 500 Hz
    - 16-Bits p-p Resolution (19 Bits Effective) at 4 kHz
    - On-Chip Per Channel System Calibration
  • Configurable Inputs 8 Single-Ended or 4 Fully Differential
  • Input Ranges
    - +625 mV, ±625 mV, +1.25 V, ±1.25 V, +2.5 V, ±2.5 V
  • 3-Wire Serial Interface SPI®, QSPI™, MICROWIRE™ and DSP Compatible
    - Schmitt Trigger on Logic Inputs
  • Single-Supply Operation
    - 5 V Analog Supply
    - 3 V or 5 V Digital Supply
  • Package: 24-Lead TSSOP

Functional Block Diagram for AD7739

AD7739 Diagram

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Documentation

Title Content Type File Type
AD7739: 8-Channel,High Throughput, 24-Bit ∑-∆ ADC Data Sheet  (Rev 0, 05/2003) (pdf, 380 kB) Data Sheets PDF
AN-607: Selecting a Low Bandwidth (<15 kSPS) Sigma-Delta ADC  (pdf, 222 kB) Application Notes PDF
AN-663: AD7732/AD7734/AD7738/AD7739 Calibration Registers  (pdf, 96 kB)
This application note concentrates on the AD7739 but is also applicable to the AD7732,AD7734,and AD7738. The purpose of this application note is to explore the calibration registers in more detail than is found on the data sheets. 		Application Notes PDF
AN-664: AD7732/AD7734/AD7738/AD7739 in Low Power Applications  (pdf, 131 kB)
This application note refers only to the AD7739, but is also generally applicable to the AD7732,AD7734 and AD7738. The purpose of this application note is to explain how to optimize the use of these parts in power sensitive applications. 		Application Notes PDF
MS-2210: Designing Power Supplies for High Speed ADC  (pdf, 327 kB) Technical Articles PDF
Delta-Sigma Rocks RF, As ADC Designers Jump On Jitter
(Electronic Design, 1/12/06) 		Technical Articles HTML
Sigma Delta ADCs (< 15 kSPS) Product Selection Guide HTML
RAQs index Rarely Asked Questions HTML
Glossary of EE Terms Glossary HTML

Design Tools,Models,Drivers & Software

Title Content Type File Type
Sigma-Delta ADC Tutorial
An interactive illustration showing the behavior of an idealized sigma-delta A/D converter. 		Utilities and Conversions HTML
AD7732/34/38/39 Codeword Tool
A tool to calculate codewords from voltages in the AD7732/34/38/39 Sigma-Delta ADCs. 		Design Calculators 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.

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Price, packaging, availability

AD7739 Model Options
Model Package Pins Temp.
Range 		Packing,
Qty 		Price*(100-499) Price*1000 pcs RoHS View PCN/ PDN Check Inventory/
Purchase/Sample
AD7739BRU Status: Production 24 ld TSSOP 24 Ind Tube, 62 $10.52 $8.95 N  Material Info PCN Purchase
AD7739BRU-REEL Status: Production 24 ld TSSOP 24 Ind Reel, 2500 - $8.95 N  Material Info PCN Purchase
AD7739BRUZ Status: Production 24 ld TSSOP 24 Ind Tube, 62 $9.11 $7.74 Y  Material Info PCN Purchase Sample
AD7739BRUZ-REEL7 Status: Production 24 ld TSSOP 24 Ind Reel, 1000 - $7.74 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.

AD7739 Evaluation Kit
Model Description Price RoHS View PCN/ PDN Check Inventory/
Purchase/Sample
EVAL-AD7739EBZ Status: Production Evaluation Board $59.00 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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