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AD7934-6:  4-Channel, 625 kSPS, 12-Bit Parallel ADC with a Sequencer

Product Details

The AD7934-6 is a 12-bit, high speed, low power, successive approximation (SAR) analog-to-digital converter (ADC). The part operates from a single 2.7 V to 5.25 V power supply and features throughput rates up to 625 kSPS. The part contains a low noise, wide bandwidth, differential track-and-hold amplifier that handles input frequencies up to 50 MHz.

The AD7934-6 features four analog input channels with a channel sequencer that allows a preprogrammed selection of channels to be converted sequentially. This part can accept either single-ended, fully differential, or pseudo differential analog inputs.

Data acquisition and conversion are controlled by standard control inputs that allow for easy interfacing to microprocessors and DSPs. The input signal is sampled on the falling edge of CONVST, which is also the point where the conversion is initiated.

The AD7934-6 has an accurate on-chip 2.5 V reference that can be used as the reference source for the analog-to-digital conversion. Alternatively, this pin can be overdriven to provide an external reference.

The AD7934-6 uses advanced design techniques to achieve very low power dissipation at high throughput rates. The part also features flexible power management options. An on-chip control register allows the user to set up different operating conditions, including analog input range and configuration, output coding, power management, and channel sequencing.

Product Highlights

  • High throughput with low power consumption.
  • Four analog inputs with a channel sequencer.
  • Accurate on-chip 2.5 V reference.
  • Single-ended, pseudo differential, or fully differential analog inputs that are software selectable.
  • No pipeline delay.
  • Accurate control of the sampling instant via a CONVST input and once-off conversion control.


  • Throughput rate: 625 kSPS
  • Specified for VDD of 2.7 V to 5.25 V
  • Power consumption
    3.6 mW maximum at 625 kSPS with 3 V supplies
    7.5 mW maximum at 625 kSPS with 5 V supplies
  • Software-configurable analog inputs
    4-channel single-ended inputs
    2-channel fully differential inputs
    2-channel pseudo differential inputs
  • 4 analog input channels with a sequencer
  • Accurate on-chip 2.5 V reference ±0.2% maximum @ 25°C, 25 ppm/°C maximum
  • 70 dB SINAD at 50 kHz input frequency
  • No pipeline delays
  • High speed parallel interface—word/byte modes
  • Full shutdown mode: 2 μA maximum
  • 28-lead TSSOP package

Functional Block Diagram for AD7934-6


Title Content Type File Type
AD7934-6: 4-Channel, 625 kSPS, 12-Bit Parallel ADC with a Sequencer Data Sheet  (Rev B, 02/2007) (pdf, 704 kB) Data Sheets PDF
MS-2210: Designing Power Supplies for High Speed ADC  (pdf, 327 kB) Technical Articles PDF
RAQs index Rarely Asked Questions HTML
Glossary of EE Terms Glossary HTML

Evaluation Kits & Symbols & Footprints

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 AD7934-6

  • For a single-ended input drive, we recommend the AD8021 or the dual AD8022.
Recommended External Voltage References for the AD7934-6
  • For a precision 2.5V/3.0V reference, we recommend the AD780.
  • For a precision 2.5V reference, we recommend the ADR421.
  • For a precision 2.048V reference, we recommend the ADR420.
Recommended Power Solutions
  • For selecting voltage regulator products, use ADIsimPower.

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Price, packaging, availability

AD7934-6 Model Options
Model Package Pins Temp.
Price*(100-499) Price*1000 pcs RoHS View PCN/ PDN Check Inventory/
AD7934BRUZ-6 Status: Production 28 ld TSSOP 28 Ind Tube, 50 $5.47 $4.66 Y  Material Info PCN Purchase Sample
AD7934BRUZ-6REEL7 Status: Production 28 ld TSSOP 28 Ind Reel, 1000 - $4.66 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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