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AD7490:  16-Channel, 1MSPS, 12-Bit ADC with Sequencer in 28-Lead TSSOP

Product Details


The AD7490 is a 12-bit high speed, low power, successive- approximation ADC. The part operates from a single 2.7 V to 5.25 V power supply and features throughput rates up to 1 MSPS. The part contains a low-noise, wide bandwidth track/hold amplifier that can handle input frequencies in excess of 1 MHz.

The conversion process and data acquisition are controlled using CS and the serial clock, allowing the device to interface with microprocessors or DSPs. The input signal is sampled on the falling edge of CS and conversion is also initiated at this point. There are no pipeline delays associated with the part.

The AD7490 uses advanced design techniques to achieve very low power dissipation at high throughput rates. For maximum throughput rates, the AD7490 consumes just 1.8 mA with 3 V supplies, and 2.5 mA with 5 V supplies. By setting the relevant bits in the control register, the analog input range for the part can be selected to be a 0 V to REFIN input or a 0 V to 2 × REFIN input, with either straight binary or twos complement output coding. The AD7490 features 16 single-ended analog inputs with a channel sequencer to allow a preprogrammed selection of channels to be converted sequen-tially. The conversion time is determined by the SCLK or twos complement output coding. The AD7490 features 16 single-ended analog inputs with a channel sequencer to allow a preprogrammed selection of channels to be converted sequen-tially. The conversion time is determined by the SCLK.

The AD7490-EP supports defense and aerospace applications (AQEC)

FEATURES and BENEFITS

  • Fast Throughput Rate: 1 MSPS
  • Specified for VDD of 2.7 V-5.25 V
  • Low power at maximum throughput rates
    5.4 mW maximum at 870 kSPS with 3 V supplies
    12.5 mW maximum at 1 MSPS with 5 V supplies
  • 16 (single-ended) inputs with sequencer
  • Wide input bandwidth 69.5 dB SNR at 50 kHz input frequency
  • See data sheet for additional features

AD7490-EP Supports defense and aerospace applications (AQEC)

  • Download AD7490-EP Data Sheet (pdf)
  • Military temperature range
    (−55°C to +125°C)
  • Controlled manufacturing baseline
  • One assembly/test site
  • One fabrication site
  • Enhanced product change notification
  • Qualification data available on request
  • V62/12635 DSCC Drawing Number

Functional Block Diagram for AD7490

Documentation

Title Content Type File Type
AD7490: 16-Channel, 1MSPS, 12-Bit ADC with Sequencer in 28-Lead TSSOP Data Sheet (Rev D, 12/2012) (pdf, 2255 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
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
UG-446: Evaluating the AD7490 Successive Approximation ADC  (pdf, 1902 kB) User Guides 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
12-Bit ADC From Analog Devices Addresses Communications and Data Acquisition Needs For Higher Speed and Increased Channel Count  (htm)
... 1 MSPS, lowest power ADC developed for high-channel count applications. (ChipCenter Product Review, Chosen as Product of the Week)
Product Reviews HTM
A/D Converter Mantra: Customize
(EE Times Product Review, 1/9/2003)
Product Reviews 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
Optical and High Speed Networking  (pdf, 2236 kB)
Analog Devices’ optical and high speed networking ICs solve a depth and breadth of challenges faced by today’s designers of datacom and telecom systems, optical modules, and subsystems. Analog Devices products address a wide range of networking applications from O/E/O conversion, clock recovery, and backplane transmission to monitoring and control of optical power, power management, and clock generation and distribution.
Overview PDF
RAQs index Rarely Asked Questions HTML
Glossary of EE Terms Glossary HTML

Design Tools,Models,Drivers & Software

Title Content Type File Type
BeMicro FPGA Project for AD7490 with Nios driver FPGA HDL HTML
AD7490 FMC-SDP Interposer & Evaluation Board / Xilinx KC705 Reference Design Device Drivers 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 AD7490
  • For low frequency and low bias current, we recommend the ADA4627-1.
  • For low distortion, low noise, dual supplies, we recommend the AD8599.
  • For precision, low noise, single supply, we recommend the AD8605 family of operational amplifiers.
  • For single supply, high speed, low power, we suggest the AD8031 or ADA4841-1.
Recommended External Voltage References for the AD7490
  • For applications requiring best accuracy, low noise, low drift, we recommend the ADR421, ADR4525 or the AD780.
  • For low noise, high output current applications, we recommend the ADR431.
  • For wide supply applications, we recommend the ADR03 or AD780.

Recommended Digital Isolators for the AD7490
  • For a 4-channel, 150Mbps data rate, we recommend the ADuM3441.
  • For a 4- channel, 90Mbps data rate, we recommend the ADuM1401.
  • For a 3-channel, 90 Mbps data rate, we recommend the ADuM1301.
Recommended Power Solutions
  • For selecting voltage regulator products, use ADIsimPower.

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Price, packaging, availability

AD7490 Model Options
Model Package Pins Temp.
Range
Packing,
Qty
Price*(100-499) Price*1000 pcs RoHS View PCN/ PDN Check Inventory/
Purchase/Sample
AD7490BCPZ Status: Production 32 ld LFCSP (5x5mm CP-32-2) 32 Ind Tray, 490 $7.08 $6.02 Y  Material Info PCN Purchase Sample
AD7490BCPZ-REEL7 Status: Production 32 ld LFCSP (5x5mm CP-32-2) 32 Ind Reel, 1500 - $6.02 Y  Material Info PCN Purchase
AD7490BRU Status: Production 28 ld TSSOP (4.4mm) 28 Ind Tube, 50 $8.18 $6.96 N  Material Info PCN Purchase
AD7490BRU-REEL7 Status: Contact ADI 28 ld TSSOP (4.4mm) 28 Ind Reel, 1000 - - N  Material Info PCN Contact ADI
AD7490BRUZ Status: Production 28 ld TSSOP (4.4mm) 28 Ind Tube, 50 $7.08 $6.02 Y  Material Info PCN Purchase Sample
AD7490BRUZ-REEL Status: Production 28 ld TSSOP (4.4mm) 28 Ind Reel, 2500 - $6.02 Y  Material Info PCN Purchase
AD7490BRUZ-REEL7 Status: Production 28 ld TSSOP (4.4mm) 28 Ind Reel, 1000 - $6.02 Y  Material Info PCN Purchase
AD7490SRU-EP-RL7 Status: Production 28 ld TSSOP (4.4mm) 28 Mil Reel, 1000 - $11.84 N  Material Info Notify Me Purchase Sample
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.

AD7490 Evaluation Board
Model Description Price RoHS View PCN/ PDN Check Inventory/
Purchase/Sample
EVAL-AD7490SDZ Status: Production Evaluation Board $59.00 Yes -
EVAL-SDP-CB1Z Status: Production Evaluation Controller Board $99.00 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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