AD7823:  2.7 V to 5.5 V, 4.5 ms, 8-Bit ADC in 8-Lead microSOIC/DIP

The AD7823 is a high speed, low power, 8-bit A/D converter that operates from a single 2.7 V to 5.5 V supply. The part contains a 4.5 µs successive approximation A/D converter, inherent track-and-hold ...More

AD7823:  2.7 V to 5.5 V, 4.5 ms, 8-Bit ADC in 8-Lead microSOIC/DIP

Product Description

The AD7823 is a high speed, low power, 8-bit A/D converter that operates from a single 2.7 V to 5.5 V supply. The part contains a 4.5 µs successive approximation A/D converter, inherent track-and-hold functionality (with a pseudo differential input) and a high speed serial interface that interfaces to most microcontrollers. AD7823 is fully specified over a temperature range of -40°C to +125°C.

By using a technique that samples the state of the CONVST (convert start) signal at the end of a conversion, the AD7823 may be used in an automatic power-down mode. When used in this mode, the AD7823 powers down automatically at the end of a conversion and "wakes up" at the start of a new conversion. This feature significantly reduces the power consumption of the part at lower throughput rates. The AD7823 can also operate in a high speed mode where the part is not powered down between conversions. In this high speed mode of operation, the conversion time of the AD7823 is 4.5 µs. The maximum throughput rate is dependent on the speed of the serial interface of the microcontroller.

The part is available in a small, 8-pin 0.3" wide, plastic dual-in-line package (mini-DIP); in an 8-lead, small outline IC (SOIC); and in an 8-lead microSOIC package.

Features

  • 8-Bit ADC with 4 µs Conversion Time
  • Small Footprint 8-Lead microSOIC Package
  • Specified Over a –40°C to +125°C Temperature Range
  • Inherent Track-and-Hold Functionality
  • Operating Supply Range: 2.7 V to 5.5 V
  • Specifications at 2.7 V to 5.5 V and 5 V ± 10%
  • Microcontroller Compatible Serial Interface
  • Optional Automatic Power-Down
  • Low Power Operation:
    570 µW at 10 kSPS Throughput Rate
    2.9 mW at 50 kSPS Throughput Rate
  • Analog Input Range: 0 V to VREF
  • Reference Input Range: 0 V to VDD
  • "Drop In" Upgrade to 10 Bits Available (AD7810)

Diagrams

AD7823 Diagram
Functional Block Diagram for AD7823

Specifications

Resolution (Bits) 8bit
T-Put Rate 200kSPS
# Chan 1
Supply V Single(+3),Single(+3.3),Single(+5)
Pwr Diss 17.5mW
Interface Ser
Ain Range (Vref) p-p,Uni (Vref)
SNR (dB) 48dB
Pkg Type DIP,SOIC,SOP

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Part# Bits Throughput Rate # of Inputs Operating Pwr Diss
AD7478 8 1MSPS 1 17.5mW
AD7478A 8 1.2MSPS 1 17.5mW
AD7468 8 200KSPS 1 570µW
AD7819 8 200KSPS 1 17.5mW
AD7823 8 200KSPS 1 17.5mW
AD7477 10 1MSPS 1 17.5mW
AD7477A 10 1MSPS 1 17.5mW
AD7467 10 200KSPS 1 630µW
AD7440 10 1MSPS 1 9mW
AD7470 10 1.75MSPS 1 12mW
AD7910 10 250KSPS 1 15mW
Pricing, Packaging & Availability

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Model
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Status
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  • Pre-Release: The model has not been released to general production, but samples may be available.
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  • 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
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Sample availability may be better than production availability. Please enter samples into your cart to check sample availability.

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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.

*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.

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