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AD7440:  Differential Input, 1 MSPS, 12- (AD7450A) & 10-Bit (AD7440) ADCs

Product Details

The AD7450A/AD7440 are respectively 12- and 10-bit, high speed, low power, successive-approximation (SAR) analog-to-digital converters that feature a fully differential analog input. These parts operate from a single 3 V or 5 V power supply and feature throughput rates up to 1 MSPS.

The parts contains a low-noise, wide bandwidth, differential track and hold amplifier (T/H), which can handle input frequencies in excess of 1 MHz with the –3 dB point being 20 MHz typically. The reference voltage is applied externally to the VREF pin and can be varied from 100 mV to 3.5 V depending on the power supply and what suits the application. The value of the reference voltage determines the common mode voltage range of the part. With this truly differential input structure and variable reference input, the user can select a variety of input ranges and bias points.

MICROWIRE is a trademark of National Semiconductor Corporation.

SPI and QSPI are trademarks of Motorola, Inc.


  • Fast Throughput Rate: 1 MSPS
  • Specified for VDD of 3 V and 5 V
  • Low Power at Max Throughput Rate:
    - 4 mW max at 1 MSPS with 3 V Supplies
    - 9.25 mW max at 1 MSPS with 5 V Supplies
  • Fully Differential Analog Input
  • Flexible Power/Serial Clock Speed Management
  • Wide Input Bandwidth: 70 dB SINAD at 100 kHz Input Frequency
  • No Pipeline Delays
  • High Speed Serial Interface
    - SPI®/QSPI™/MICROWIRE™/ DSP Compatible
  • Power-Down Mode: 1 µA max
  • 8 Lead SOT-23 and µSOIC Packages

Functional Block Diagram for AD7440

Similar Products

Low Resolution - Single Channel Unipolar/Bipolar 8/10/12-Bit PulSAR ADCs


Title Content Type File Type
AD7440/AD7450A: Differential Input, 1MSPS, 10-Bit and 12-Bit ADCs in 8-lead SOT-23 Data Sheet  (Rev C, 09/2005) (pdf, 777 kB) Data Sheets PDF
MS-2210: Designing Power Supplies for High Speed ADC  (pdf, 327 kB) Technical Articles PDF
Maximize Performance When Driving Differential ADCs
... Converting a single-ended signal to a differential signal before the analog-to-digital conversion can improve the performance of your data-acquisition system. By Sally Paterson, Analog Devices (EDN, 6/12/2003)
Technical Articles HTML
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 AD7440

  • For ultra low distortion, low power differential amplifier, we recommend the ADA4940-1.
  • For low noise, low cost, precision amplifier, we recommend the AD8655 or the dual AD8656.
Recommended Precision Voltage References for the AD7440
  • For a 2.5V/3V reference, we recommend the AD780.
  • For a 2.5V reference, we recommend the ADR421 or the ADR441.
  • For a 2.048V reference, we recommend the ADR420 or the ADR440.
Recommended Power Solutions
  • For selecting voltage regulator products, use ADIsimPower.

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Price, packaging, availability

AD7440 Model Options
Model Package Pins Temp.
Price*(100-499) Price*1000 pcs RoHS View PCN/ PDN Check Inventory/
AD7440BRM-REEL7 Status: Last Time Buy 8 ld MSOP 8 Ind Reel, 1000 - $2.66 N  Material Info PCN/PDN Purchase
AD7440BRMZ Status: Production 8 ld MSOP 8 Ind Tube, 50 $2.98 $2.53 Y  Material Info PCN Purchase Sample
AD7440BRTZ-R2 Status: Production 8 ld SOT-23 8 Ind Reel, 250 $2.98 $2.98 Y  Material Info PCN Purchase
AD7440BRTZ-REEL7 Status: Production 8 ld SOT-23 8 Ind Reel, 3000 - $2.53 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.

AD7450A Evaluation Board
Model Description Price RoHS View PCN/ PDN Check Inventory/
EVAL-AD7450ASDZ 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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