Top

18-Bit, 1Msps, Low-Power, Fully Differential SAR ADC

Fast and Low-Power 18-Bit SAR ADC with Reference Buffer

Product Details

Key Features

Parametric specs for Precision ADCs (< 5Msps)
Resolution (bits) (ADC) 18
# Input Channels 1
Conv. Rate (ksps) (max) 1000
Data Bus DSP-Compatible Serial
Microwire
QSPI
SPI
ADC Architecture SAR
Diff/S.E. Input Diff. Only
External VREF (V) (min) 2.5
External VREF (V) (max) 3.6
Unipolar VIN (V) (max) 3.6
INL (±LSB) 1.5
Package/Pins TQFN/20
Budgetary
Price (See Notes)
20.91
View Less

Simplified Block Diagram

Technical Docs

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .

Sampling:
Selecting the Sample button above will redirect to the third-party ADI Sample Site. The part selected will carry over to your cart on this site once logged in. Please create a new account there if you have never used the site before. Contact SampleSupport@analog.com with any questions regarding this Sample Site.

Parameters

Parametric specs for Precision ADCs (<u><</u> 5Msps)
Resolution (bits) (ADC) 18
# Input Channels 1
Conv. Rate (ksps) (max) 1000
Data Bus DSP-Compatible Serial
Microwire
QSPI
SPI
ADC Architecture SAR
Diff/S.E. Input Diff. Only
External VREF (V) (min) 2.5
External VREF (V) (max) 3.6
Unipolar VIN (V) (max) 3.6
INL (±LSB) 1.5
Package/Pins TQFN/20
Budgetary
Price (See Notes)
20.91

Key Features

  • High DC/AC Accuracy Provides Better Measurement Quality
    • 18-Bit Resolution with No Missing Codes
    • ±1.5 LSB INL and ±0.5 LSB DNL Maximum at 18 Bits
    • 98.9dB SNR and 98.8dB SINAD at fIN = 10kHz
    • -125dB SFDR and -123dB THD at fIN = 10kHz
  • High Sampling Rate SAR Architecture Enables Fast Settling and Acquisition
    • 1Msps Throughput with No Pipeline Delay
  • Integration Simplifies Design
    • Integrated Reference Buffers
    • ±VREF Unipolar Differential Analog Input Range
  • Scalable Ultra-Low Power Supply Reduces Power Consumption
    • 6.7mW at 1Msps
    • Scale as 6.7µW/ksps
  • 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

Description

The MAX11902 is an 18-bit, 1Msps, single-channel, fully differential SAR ADC with internal reference buffers. The MAX11902 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 98.9dB SNR and -123dB THD, guarantees 18-bit resolution with no-missing codes and 1.5 LSB INL (max).

The MAX11902 communicates data using a SPI-compatible serial interface. The MAX11902 is offered in a 20-pin, 4mm x 4mm, TQFN package and is specified over the -40°C to +85°C* operating temperature range.

Simplified Block Diagram

MAX11902: Application Diagram MAX11902: Application Diagram Zoom icon

Technical Docs

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .

Sampling:
Selecting the Sample button above will redirect to the third-party ADI Sample Site. The part selected will carry over to your cart on this site once logged in. Please create a new account there if you have never used the site before. Contact SampleSupport@analog.com with any questions regarding this Sample Site.