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AD7450:  Differential Input, 1 MSPS, 12-BIT SAR ADC

Product Details

The AD7450 is a 12-bit, high speed, low power, successive-approximation (SAR) analog-to-digital converter featuring a fully differential analog input. It operates from a single 3 V or 5 V power supply and features throughput rates up to 833 kSPS or 1 MSPS respectively.

This part 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 for the AD7450 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.

The conversion process and data acquisition are controlled using CS and the serial clock allowing the device to interface with Microprocessors or DSPs. The input signals are sampled on the falling edge of CS and the conversion is also initiated at this point. The SAR architecture of this part ensures that there are no pipeline delays.

The AD7450 uses advanced design techniques to achieve very low power dissipation at high throughput rates.


  • Fast Throughput Rate: 1 MSPS
  • Specified for VDD of 3 V and 5 V
  • Low Power at max Throughput Rate:
    - 3.75 mW max at 833 kSPS with 3 V Supplies
    - 9 mW max at 1MSPS with 5 V Supplies
  • Fully Differential Analog Input
  • Flexible Power/Serial Clock Speed Management
  • Variable Reference Input
  • Wide Input Bandwidth: 70dB SINAD at 300kHz Input Frequency
  • No Pipeline Delays
  • High Speed Serial Interface
    - SPI®/QSPI™/MicroWire™/DSP
  • Powerdown Mode: 1µA max

Functional Block Diagram for AD7450

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Title Content Type File Type
AD7450: Differential Input, 1 MSPS 12-Bit ADC in µSOIC-8 and SO-8 Data Sheet  (Rev A, 09/2010) (pdf, 368 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
RAQs index Rarely Asked Questions HTML
Glossary of EE Terms Glossary HTML

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Price, packaging, availability

AD7450 Model Options
Model Package Pins Temp.
Price*(100-499) Price*1000 pcs RoHS View PCN/ PDN Check Inventory/
AD7450ARMZ Status: Production 8 ld MSOP 8 Ind Tube, 50 $4.77 $4.05 Y  Material Info PCN Purchase Sample
AD7450ARMZ-REEL7 Status: Production 8 ld MSOP 8 Ind Reel, 1000 - $4.05 Y  Material Info PCN Purchase
AD7450ARZ Status: Production 8 ld SOIC 8 Ind Tube, 98 $4.77 $4.05 Y  Material Info PCN Purchase Sample
AD7450ARZ-REEL Status: Last Time Buy 8 ld SOIC 8 Ind Reel, 2500 - $4.05 Y  Material Info PCN/PDN Purchase
AD7450ARZ-REEL7 Status: Production 8 ld SOIC 8 Ind Reel, 1000 - $4.05 Y  Material Info PCN Purchase
AD7450BRMZ Status: Production 8 ld MSOP 8 Ind Tube, 50 $5.18 $4.40 Y  Material Info PCN Purchase
AD7450BRZ Status: Production 8 ld SOIC 8 Ind Tube, 98 $5.18 $4.40 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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