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18-Bit, 500ksps, ±5V SAR ADC with Internal Reference in TDFN

Industry's Smallest, True Bipolar ±5V, 18-Bit ADC

Product Details

Key Features

Parametric specs for Precision ADCs (< 5Msps)
Resolution (bits) (ADC) 18
# Input Channels 1
Conv. Rate (ksps) (max) 500
Data Bus DSP-Compatible Serial
Microwire
QSPI
SPI
ADC Architecture SAR
Diff/S.E. Input Both
Internal VREF (V) (nominal) 4.096
External VREF (V) (min) 2.5
External VREF (V) (max) 4.25
Bipolar VIN (±V) (max) 5
INL (±LSB) 2.5
Package/Pins TDFN/12
Budgetary
Price (See Notes)
20.7
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Simplified Block Diagram

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Parameters

Parametric specs for Precision ADCs (<u><</u> 5Msps)
Resolution (bits) (ADC) 18
# Input Channels 1
Conv. Rate (ksps) (max) 500
Data Bus DSP-Compatible Serial
Microwire
QSPI
SPI
ADC Architecture SAR
Diff/S.E. Input Both
Internal VREF (V) (nominal) 4.096
External VREF (V) (min) 2.5
External VREF (V) (max) 4.25
Bipolar VIN (±V) (max) 5
INL (±LSB) 2.5
Package/Pins TDFN/12
Budgetary
Price (See Notes)
20.7

Key Features

  • High DC/AC Accuracy Improves Measurement Quality
    • 18-Bit Resolution with No Missing Codes
    • 500ksps Throughput Rates without Pipeline Delay/Latency
    • 94.6dB SNR and -101.4dB THD at 10kHz
    • 1.6 LSBRMS Transition Noise
    • ±0.5 LSB DNL (typ) and ±2.8 LSB INL (typ)
  • Highly Integrated ADC Saves Cost and Space
    • 6ppm/°C Internal Reference
    • Internal Reference Buffer
    • ±5V Bipolar Analog Input Range
  • Wide Supply Range and Low Power Simplify Power-Supply Design
    • 5V Analog Supply
    • 2.3V to 5V Digital Supply
    • 25.8mW Power Consumption at 500ksps
    • 10µA in Shutdown Mode
  • Multi-Industry Standard Serial Interface and Small Package Reduce Size
    • SPI/QSPI™/MICROWIRE®/DSP-Compatible Serial Interface
    • 3mm x 3mm Tiny 12-Pin TDFN Package

Applications/Uses

  • Automatic Test Equipment
  • Data Acquisition Systems
  • Industrial Control Systems/Process Control
  • Medical Instrumentation

Description

The MAX11156 18-bit, 500ksps, SAR ADC offers excellent AC and DC performance with true bipolar input range, small size, and internal reference. The MAX11156 measures a ±5V (10VP-P) input range while operating from a single 5V supply. A patented charge-pump architecture allows direct sampling of high-impedance sources. The MAX11156 integrates an optional internal reference and buffer, saving additional cost and space.

This ADC achieves 94.6dB SNR and -101.4dB THD (typ). The MAX11156 guarantees 18-bit no-missing codes and ±2.8 LSB INL (typ).

The MAX11156 communicates using an SPI-compatible serial interface at 2.5V, 3V, 3.3V, or 5V logic. The serial interface can be used to daisy-chain multiple ADCs in parallel for multichannel applications and provides a busy indicator option for simplified system synchronization and timing.

The MAX11156 is offered in a 12-pin, 3mm x 3mm, TDFN package and is specified over the -40°C to +85°C temperature range. 

Simplified Block Diagram

MAX11156: Typical Operating Circuit MAX11156: Typical Operating Circuit 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 .