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

Small, True Bipolar Input, 18-Bit SAR ADC with Internal Reference

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
Bipolar VIN (±V) (max) 5
INL (±LSB) 2.7
Package/Pins UMAX/10
Budgetary
Price (See Notes)
17.7
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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
Bipolar VIN (±V) (max) 5
INL (±LSB) 2.7
Package/Pins UMAX/10
Budgetary
Price (See Notes)
17.7

Key Features

  • High DC/AC Accuracy Improves Measurement Quality
    • 18-Bit Resolution with No Missing Codes
    • 500ksps Throughput Rates Without Pipeline Delay/Latency
    • 93.7dB SNR and -100.0dB THD at 10kHz
    • 2.0 LSBRMS Transition Noise
    • ±0.5 LSB DNL (typ) and ±2.7 LSB INL (typ)
  • Highly Integrated ADC Saves Cost and Space
    • ±7ppm/°C Internal Reference
    • Internal Reference Buffer
  • Wide Supply Range and Low Power Simplify Power-Supply Design
    • 5V Analog Supply
    • 2.3V to 5V Digital Supply
    • 38mW Power Consumption at 500ksps
    • 10µA in Shutdown Mode
  • Multi-Industry Standard Serial Interface and Small Package Reduces Size
    • SPI/QSPI™/MICROWIRE®/DSP-Compatible Serial Interface
    • 3mm x 5mm Tiny 10-Pin µMAX Package

Applications/Uses

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

Description

The MAX11158 is an 18-bit, 500ksps, SAR ADC offering excellent AC and DC performance with true bipolar input range, internal reference, and small size. The MAX11158 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 MAX11158 integrates a low drift reference with internal buffer, saving the cost and space of an external reference.

This ADC achieves 93.7dB SNR and -100.0dB THD. The MAX11158 guarantees 18-bit no-missing codes and ±2.7 LSB INL (typ).

The MAX11158 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 for multichannel applications and provides a busy indicator option for simplified system synchronization and timing.

The MAX11158 is offered in a 10-pin, 3mm x 5mm, μMAX® package and is specified over the -40°C to +85°C temperature range.

Simplified Block Diagram

MAX11158: Typical Operating Circuit MAX11158: 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 .