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AD7923:  4-Channel 200 kSPS, 12-Bit A/D Converter with Sequencer in 16-Lead TSSOP

Product Details


The AD7923 is a 12-bit, high speed, low power, 4-channel, successive-approximation (SAR) ADC. It operates from a single 2.7 V to 5.25 V power supply and features throughput rates up to 200 kSPS. It contains a low noise, wide bandwidth track-and-hold amplifier that can handle input frequencies in excess of 8 MHz.

The conversion process and data acquisition are controlled by CS and the serial clock signal, allowing the device to easily interface with microprocessors or DSPs. The input signal is sampled on the falling edge of CS and conversion is also initiated at this point.

The AD7923 uses advanced design techniques to achieve very low power dissipation at maximum throughput rates. At maximum throughput rates, it consumes 1.2 mA maximum with 3 V supplies and 1.5 mA maximum with 5 V supplies.

Through the configuration of the control register, the analog input range can be selected as 0 V to REFIN or 0 V to 2 × REFIN, with either straight binary or twos complement output coding. The AD7923 features four single-ended analog inputs with a channel sequencer to allow a preprogrammed selection of channels to be converted sequentially.

The conversion time for the AD7923 is determined by the serial clock, SCLK, frequency, since this is used as the master clock to control the conversion. The conversion time can be as short as 800 ns with a 20 MHz SCLK.

FEATURES and BENEFITS

  • Fast Throughput Rate: 200 kSPS
  • Specified for VDD of 2.7 V
    to 5.25 V
  • Low Power:
    - 3.6 mW max at 200 kSPS with 3 V supply
    - 7.5 mW max at 200 kSPS with 5 V supply
  • Four (Single Ended) Inputs with Sequencer
  • Flexible Power/Serial Clock Speed Management
  • Wide Input Bandwidth: 69.5 dB SNR at 50 kHz Input Frequency
  • No Pipeline Delays
  • High Speed Serial Interface SPI® /QSPI™ /MICROWIRE™ /DSP Compatible
  • Shutdown Mode: 0.5 µA max
  • 16-Pin TSSOP Package
  • Qualified for automotive applications

AD7923-EP Supports defense and aerospace applications (AQEC)

  • Download AD7923-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

Functional Block Diagram for AD7923

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Documentation

Title Content Type File Type
AD7923: 4-Channel, 200 kSPS, 12-Bit ADC with Sequencer in 16-Lead TSSOP Data Sheet (Rev D, 06/2013) (pdf, 417 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
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
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
Brochure: Monitor and Control Solutions for Communications Systems Overview HTML
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
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 Driver Amplifiers for the AD7923
  • 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, low cost, single supply, we recommend the AD8605 or the AD8615.
Recommended Precison References - 2.5V for the AD7923
  • 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 Digital Isolators for the AD7923
  • For a 4-channel, 10Mbps data rate, we recommend the ADuM1411.

  • For a 4- channel, 90Mbps data rate, we recommend the ADuM1401.
Recommended Power Solutions
  • For selecting voltage regulator products, use ADIsimPower.

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Price, packaging, availability

AD7923 Model Options
Model Package Pins Temp.
Range
Packing,
Qty
Price*(100-499) Price*1000 pcs RoHS View PCN/ PDN Check Inventory/
Purchase/Sample
AD7923BRU Status: Production 16 ld TSSOP 16 Ind Tube, 96 $3.51 $2.98 N  Material Info PCN Purchase Sample
AD7923BRUZ Status: Production 16 ld TSSOP 16 Comm. Tube, 96 $3.04 $2.58 Y  Material Info PCN Purchase Sample
AD7923BRUZ-REEL Status: Production 16 ld TSSOP 16 Comm. Reel, 2500 - $2.58 Y  Material Info PCN Purchase
AD7923BRUZ-REEL7 Status: Production 16 ld TSSOP 16 Comm. Reel, 1000 - $2.58 Y  Material Info PCN Purchase
AD7923SRU-EP Status: Production TSSOP 4.4 MM 16 Comm. Tube, 96 $30.40 $25.80 N  Material Info Notify Me Purchase Sample
AD7923SRU-EP-RL7 Status: Production TSSOP 4.4 MM 16 Comm. Reel, 1000 - $25.80 N  Material Info Notify Me Purchase Sample
AD7923WYRUZ-REEL7 Status: Production TSSOP 4.4 MM 16 Ind Reel, 1000 - $2.76 Y  Material Info PCN 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.


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