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AD7920:  250 kSPS, 12- Bit ADC in 6 Lead SC70

Product Details


The AD7910/AD7920 are 10-bit and 12-bit, high speed, low power, successive-approximation ADCs respectively. The parts operate from a single 2.35 V to 5.25 V power supply and feature throughput rates up to 250 kSPS. The parts contain a low-noise, wide bandwidth track/hold amplifier, which can handle input frequencies in excess of 6 MHz.

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

The AD7910/AD7920 use advanced design techniques to achieve very low power dissipation at high throughput rates.

The reference for the part is taken internally from VDD. This allows the widest dynamic input range to the ADC. Thus the analog input range for the part is 0 to VDD. The conversion rate is determined by the SCLK.

FEATURES and BENEFITS

  • Throughput Rate: 250 kSPS
  • Specified for VDD of 2.35 V to 5.25 V
  • Low Power:
    - 3 mW typ at 250 KSPS with 3 V Supplies
    - 12.5 mW typ at 250 KSPS with 5 V Supplies
  • Wide Input Bandwidth:
    - 70 dB SNR at 100 kHz Input Frequency
  • No Pipeline Delays
  • Flexible Power/Serial Clock Speed Management
  • High Speed Serial Interface SPI®/QSPI™/MICROWIRE™/DSP Compatible
  • Standby Mode: 1 µA max
  • 6-Lead SC70 Package
  • 8-Lead µSOIC Package

Functional Block Diagram for AD7920

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Documentation

Title Content Type File Type
AD7910/AD7920: 250 kSPS, 10-/12-Bit ADCs in 6 Lead SC70 Data Sheet  (Rev C, 09/2005) (pdf, 486 kB) Data Sheets PDF
CN-0241: High-Side Current Sensing with Input Overvoltage Protection  (pdf, 354 kB) Circuit Note PDF
MS-2210: Designing Power Supplies for High Speed ADC  (pdf, 327 kB) Technical Articles 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

Design Tools,Models,Drivers & Software

Title Content Type File Type
BeMicro FPGA Project for CN0241 with Nios driver FPGA HDL HTML
CN0241 FMC-SDP Interposer & Evaluation Board / Xilinx KC705 Reference Design FPGA HDL HTML
AD7920 - Microcontroller No-OS Driver 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

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Companion Products

Suggested Companion Products


Recommended Input Buffer Amplfiers for the AD7920

  • For high performance, high speed applications, we recommend the AD8021 or the ADA4899-1.
  • For high performance, lower speed applications, we recommend the ADA4000-1 or the ADA4627.
Recommended Precision References for the AD7920
  • For a low power, 5V supply source, we recommend the REF195.
  • For a low power, 3V supply source, we recommend the REF193.
Recommended Power Solutions
  • For selecting voltage regulator products, use ADIsimPower.

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Price, packaging, availability

AD7920 Model Options
Model Package Pins Temp.
Range
Packing,
Qty
Price*(100-499) Price*1000 pcs RoHS View PCN/ PDN Check Inventory/
Purchase/Sample
AD7920AKSZ-500RL7 Status: Production 6 ld SC70 6 Ind Reel, 500 $2.44 $2.07 Y  Material Info PCN Purchase Sample
AD7920AKSZ-REEL7 Status: Production 6 ld SC70 6 Ind Reel, 3000 - $2.07 Y  Material Info PCN Purchase
AD7920BKSZ-500RL7 Status: Production 6 ld SC70 6 Ind Reel, 500 $3.05 $2.59 Y  Material Info PCN Purchase Sample
AD7920BKSZ-REEL Status: Production 6 ld SC70 6 Ind Reel, 10000 - $2.59 Y  Material Info PCN Purchase
AD7920BKSZ-REEL7 Status: Production 6 ld SC70 6 Ind Reel, 3000 - $2.59 Y  Material Info PCN Purchase
AD7920BRMZ Status: Production 8 ld MSOP 8 Ind Tube, 50 $3.05 $2.59 Y  Material Info PCN Purchase Sample
AD7920BRMZ-REEL Status: Last Time Buy 8 ld MSOP 8 Ind Reel, 3000 - $2.59 Y  Material Info PCN/PDN Purchase
AD7920BRMZ-REEL7 Status: Production 8 ld MSOP 8 Ind Reel, 1000 - $2.59 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.


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