Dual Differential 16-Bit, 1 MSPS PulSAR 12.0 mW in QSOP

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Part Details
Part Models 2
1ku List Price Starting From $17.66
  • 16-bit resolution with no missing codes
  • Throughput: 1 MSPS
  • Low power dissipation
    7.0 mW at 1 MSPS (VDD1 and VDD2 only)
    12.0 mW at 1 MSPS (total)
    140 µW at 10 kSPS
  • INL: ±0.5 LSB typical, ±2.0 LSB maximum
  • True differential analog input range: ±VREF
    0 V to VREF with VREF between 2.4 V to 5.1 V
    Allows use of any input range
    Easy to drive with the ADA4941-1
  • SINAD: 93.5 dB at 1 kHz
  • THD: −112 dB at 1 kHz
  • No pipeline delay
  • Single-supply 2.5 V operation with 1.8 V/2.5 V/3 V/5 V logic interface
  • Serial interface SPI/QSPI/MICROWIRE/DSP compatible
  • 20-lead QSOP package
  • Wide operating temperature range: −40°C to +125°C
Additional Details
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The AD7903 is a dual 16-bit, successive approximation, analog-to-digital converter (ADC) that operates from a single power supply, VDDx, per ADC. It contains two low power, high speed, 16-bit sampling ADCs and a versatile serial interface port. On the CNVx rising edge, the AD7903 samples the voltage difference between the INx+ and INx− pins. The voltages on these pins usually swing in opposite phases between 0 V and VREF. The externally applied reference voltage of the REFx pins (VREF) can be set independently from the supply voltage pins, VDDx. The power of the device scales linearly with throughput.

Using the SDIx inputs, the SPI-compatible serial interface can also daisy-chain multiple ADCs on a single 3-wire bus and provide an optional busy indicator. It is compatible with 1.8 V, 2.5 V, 3 V, or 5 V logic, using the separate VIOx supplies.

The AD7903 is available in a 20-lead QSOP package with operation specified from −40°C to +125°C.


  • Battery-powered equipment
  • Communications
  • Automated test equipment (ATE)
  • Data acquisition
  • Medical instrumentation
  • Redundant measurement
  • Simultaneous sampling
Part Models 2
1ku List Price Starting From $17.66

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Software & Part Ecosystem

Software & Part Ecosystem

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Evaluation Kit

Evaluation Kits 1

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AD7903 Evaluation Board



AD7903 Evaluation Board

AD7903 Evaluation Board

Product Detail

The EVAL-AD7903SDZ is an evaluation board designed to demonstrate the low power AD7903 performance and to provide an easy to understand interface for a variety of system applications. The AD7903 is a dual differential 16-bit, 1 MSPS PulSAR® ADC. A full description of the AD7903 is available in the AD7903 data sheet and should be consulted when using this evaluation board.

The evaluation board is ideal for use with the Analog Devices, Inc., system demonstration platform (SDP) board, EVAL-SDP-CB1Z. The evaluation board interfaces to the SDP board via a 120-pin connector. SMA Connectors J6, J7, J10, and J15 are provided to connect a low noise analog signal source.


The user PC software executable controls the evaluation board over the USB through the SDP board, EVAL-SDP-CB1Z.


On-board components include the following:

ADR435: high precision, buffered band gap 5.0 V reference

AD8031: reference buffer

ADA4841-1: signal conditioning circuit with op amps

ADP7104 and ADP2301: regulators to derive necessary voltage levels on board

Tools & Simulations

Tools & Simulations 2

Reference Designs

Reference Designs 1

Simplified Receiver Subsystem for Magnitude and Phase Measurements

RF-to-Bits Solution Offers Precise Phase and Magnitude Data to 6 GHz

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RF-to-Bits Solution Offers Precise Phase and Magnitude Data to 6 GHz


Circuits from the lab

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RF-to-Bits Solution Offers Precise Phase and Magnitude Data to 6 GHz

Features and Benefits

  • Precise Magnitude and Phase Measurements to 6GHz
  • Small PCB Footprint
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Design & Integration Tools

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