MAX11905

20-Bit, 1.6Msps, Low-Power, Fully Differential SAR ADC

Fastest and Lowest Power 20-Bit SAR ADC


Please check latest availability status for a specific part variant.

Description

The MAX11905 is a 20-bit, 1.6Msps, single-channel, fully differential SAR ADC with internal reference buffers. The MAX11905 provides excellent static and dynamic performance with best-in-class power consumption that directly scales with throughput. The device has a unipolar differential ±VREF input range. Supplies include a 3.3V supply for the reference buffers, a 1.8V analog supply, a 1.8V digital supply, and a 1.5V to 3.6V digital interface supply.

This ADC achieves 98.3dB SNR and -123dB THD, guarantees 20-bit resolution with no-missing codes and 6 LSB INL (max).

The MAX11905 communicates data using a SPI-compatible serial interface. The MAX11905 is offered in a 20-pin, 4mm x 4mm, TQFN package and is specified over the -40°C to +85°C operating temperature range.

MAX11905: Functional Diagram MAX11905: Functional Diagram Enlarge+

Key Features

  • High DC/AC Accuracy Provides Better Measurement Quality
    • 20-Bit Resolution with No Missing Codes
    • ±6 LSB INL and ±1 LSB DNL Maximum at 20 Bits
    • 98.3dB SNR and 98.1dB SINAD at fIN = 10kHz
    • -123dB THD at fIN = 10kHz
  • High Sampling Rate SAR Architecture Enables Fast Settling and Acquisition
    • 1.6Msps Throughput with No Pipeline Delay
  • Integration Simplifies Design
    • Integrated Reference Buffers, VREF = 2.5V to 3.6V
    • ±VREF Unipolar Differential Analog Input Range
  • Scalable Ultra-Low Power Supply Reduces Power Consumption
    • 9mW at 1.6Msps
  • Flexible Low-Voltage Supplies Save Cost
    • 1.8V Analog and Digital Core Supply
    • 1.5V to 3.6V Digital Interface Supply
    • 3.3V REFVDD Reference Buffer Supply
  • Flexible, Industry-Standard Serial Interface and Small Package Reduce Size
    • SPI-/QSPI-/MICROWIRE®/DSP-Compatible
    • 20-Pin, 4mm x 4mm, TQFN Package

Applications/Uses

  • Automatic Test Equipment
  • Battery-Powered Equipment
  • Data Acquisition Systems
  • Medical Instrumentation
  • Process Control and Industrial Automation
  • Telecommunications
  • Test and Measurement
Part NumberResolution
(bits)
Input Chan.Conv. Rate
(ksps)
ADC ArchitectureData BusDiff/S.E. InputExternal VREF
(V)
External VREF
(V)
Unipolar VIN
(V)
SNR
(dB)
THD
(dB)
INL
(±LSB)
Package/PinsBudgetary
Price
ADCmaxminmaxmaxSee Notes
MAX11905 2011600SAR
DSP-Compatible Serial
Microwire
QSPI
SPI
Diff. Only2.53.63.698.3-1236
TQFN/20
$29.90 @1k
See All Precision ADCs (< 5Msps) (470)
Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.


MAX11905EVKIT: Evaluation Kit for the MAX11900, MAX11901, MAX11902, MAX11903, MAX11904, and MAX11905
MAX11905DIFEVKIT: Evaluation Kit for the MAX11905

CAD Symbols and Footprints

  • MAX11905ETP+
  • MAX11905ETP+T
  • Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C  

    Note : The failure rates are summarized by technology and mapped to the associated material part numbers. The failure rates are highly dependent on the number of units tested.

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