content here.
content here.

AD7922:  2-Channel, 2.35 V to 5.25 V, 1 MSPS, 12-Bit A/D Converter

The AD7912/AD7922 are 10-bit and 12-bit, high speed, low power, 2-channel, 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 1 MSPS. 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 ...More

AD7922:  2-Channel, 2.35 V to 5.25 V, 1 MSPS, 12-Bit A/D Converter

Product Description

The AD7912/AD7922 are 10-bit and 12-bit, high speed, low power, 2-channel, 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 1 MSPS. 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 pipeline delays associated with the part.

The channel to be converted is selected through the DIN pin and the mode of operation is controlled by CS. The serial data stream from the DOUT pin has a channel identifier bit and a mode identifier bit, which provide information about the channel converted and the current mode of operation.

As a result of the Daisy Chain mode of operation, several AD7912/AD7922 can be connected together in Daisy Chain configuration. The Daisy Chain mode allows the user to read the conversion result from the ADCs contained in the chain.

The AD7912/AD7922 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 signal.

RESOURCES & TOOLS

What is your task? Try Lead the Way AdvisorTM BETA
Eb

EVALUATION BOARDS & DEVELOPMENT KITS

  • Fast Throughput Rate: 1 MSPS
  • Specified for VDD of 2.35 V to 5.25 V
  • Low Power:
    4.8 mW typ at 1 MSPS with 3 V Supplies
    15.5 mW typ at 1 MSPS with 5 V Supplies
  • Wide Input Bandwidth:
    71.4 dB min SNR at 100 kHz Input Frequency
  • Flexible Power/Serial Clock Speed Management
  • No Pipeline Delays
  • High Speed Serial Interface SPI®/QSPI™ /MICROWIRE™ /DSP Compatible
  • Standby Mode: 1 µA max
  • Daisy Chain Mode
  • 8-Lead TSOT Package
  • 8-Lead MSOP Package
  • Resolution (Bits): 12bit
  • T-Put Rate: 1MSPS
  • # Chan: 2
  • Supply V: Single(+2.5),Single(+3),Single(+3.3),Single(+5)
  • Pwr Diss: 15mW
  • Interface: Ser,SPI
  • Ain Range: Uni Vdd
  • SNR (dB): 72.5dB
  • Pkg Type: SOP,SOT

Functional Block Diagram for AD7922

AD7922 Diagram
Functional Block Diagram for AD7922

Of Note ...

For samples and technical information, please contact the ADC Development Group. Please include your name, company, address and a brief description of your application.

Similar Products

arrow View Full Interactive Product Selection Table
Part# Bits Throughput Rate # of Inputs Operating Pwr Diss
AD7922 12 1MSPS 2 15mW
AD7492 12 1MSPS 1 15mW
AD7495 12 1MSPS 1 13mW
AD7450A 12 1MSPS 1 9mW
AD7451 12 1MSPS 1 9.25mW
AD7472 12 1.5MSPS 1 12mW
AD7450 12 1MSPS 1 9mW
AD7475 12 1MSPS 1 10.5mW
AD7924 12 1MSPS 4 13.5mW
AD7912 10 1MSPS 2 15mW
AD7928 12 1MSPS 8 13.5mW
back to top

Pricing, Packaging & Availability

Print Table
back to top

Help

Model
The model number is a specific version of a generic that can be purchased or sampled.

Status
Status indicates the current lifecycle of the product. This can be one of 4 stages:
  • Pre-Release: The model has not been released to general production, but samples may be available.
  • Production: The model is currently being produced, and generally available for purchase and sampling.
  • Last Time Buy: The model has been scheduled for obsolescence, but may still be purchased for a limited time.
  • Obsolete: The specific part is obsolete and no longer available. Other models listed in the table may still be available (if they have a status that is not obsolete).
Package Description
The package for this IC (i.e. DIP, SOIC, BGA). An Evaluation Board is a board engineered to show the performance of the model, the part is included on the board.

For detailed drawings and chemical composition please consult our  Package Site

Pin Count
Pin Count is the number of pins, balls, or pads on the device. Pin-out diagrams & pin function descriptions may be found in the datasheet.

Temperature Range
This is the acceptable operating range of the device. The various ranges specified are as follows:
  • Commercial: 0 to +70 degrees Celsius
  • Military : -55 to +125 degrees Celsius
  • Industrial: Temperature ranges may vary by model. Please consult the datasheet for more information.
  • Automotive: -40 to +125 degrees Celsius
Price
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.

Production Availability
This is the date Analog Devices, Inc. anticipates that the product will ship from the warehouse. Most orders ship within 48 hours of this date.Once an order has been placed, Analog Devices, Inc. will send an Order Acknowledgement email to confirm your delivery date. It is important to note the scheduled dock date on the order entry screen. We do take orders for items that are not in stock, so delivery may be scheduled at a future date. Also, please note the warehouse location for the product ordered. We have warehouses in the United States, Europe and Southeast Asia. Transit times from these sites may vary.
Sample availability may be better than production availability. Please enter samples into your cart to check sample availability.

RoHS Compliant
Due to environmental concerns, ADI offers many of our products in lead-free versions. For more information about lead-free parts, please consult our Pb (Lead) free information page.

View PCN
This is the list of Product Change Notifications (PCN) published on the web for this model. Click on the link to access PCN Information.Only select pre-2009 PCN�s are available on-line. To obtain a pre-2009 PCN, contact your ADI Sales Rep. For more information on ADI's PCN process, please visit our PCN Policy Statement page

*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.
**Sample availability may be better than production availability. Please enter samples into your cart to check sample availability.