Top

Fault-Protected, 12-Bit ADCs with Software-Selectable Input Range

Fault-Protected, 12-Bit ADCs with Software-Selectable Input Range

Product Details

Key Features

Parametric specs for Precision ADCs (< 5Msps)
Resolution (bits) (ADC) 12
# Input Channels 1
Conv. Rate (ksps) (max) 87
Data Bus SPI
ADC Architecture SAR
Diff/S.E. Input S.E. Only
Internal VREF (V) (nominal) 4.096
External VREF (V) (min) 2.4
External VREF (V) (max) 4.18
Unipolar VIN (V) (max) 10
Bipolar VIN (±V) (max) 10
INL (±LSB) 0.3
Package/Pins UMAX/8
Budgetary
Price (See Notes)
3.78
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) 12
# Input Channels 1
Conv. Rate (ksps) (max) 87
Data Bus SPI
ADC Architecture SAR
Diff/S.E. Input S.E. Only
Internal VREF (V) (nominal) 4.096
External VREF (V) (min) 2.4
External VREF (V) (max) 4.18
Unipolar VIN (V) (max) 10
Bipolar VIN (±V) (max) 10
INL (±LSB) 0.3
Package/Pins UMAX/8
Budgetary
Price (See Notes)
3.78

Key Features

  • Four Software-Selectable Input Ranges
    • MAX1272: 0 to 10V, 0 to 5V, ±10V, ±5V
    • MAX1273: 0 to VREF, 0 to VREF / 2, ±VREF, ±VREF / 2
  • 12-Bit Resolution, No Missing Codes
  • 5V Single-Supply Operation
  • SPI/QSPI/MICROWIRE-Compatible 3-Wire Interface
  • 87ksps Sampling Rate
  • ±12V Fault-Protected Analog Input (MAX1272)
  • Internal (4.096V) or External (2.4V to 4.18V) Reference
  • Low Power
    • 1.5mA at 87ksps
    • 0.4mA at 10ksps
    • 0.2mA at 1ksps
  • Four Power-Down Modes
  • 8-Pin PDIP Package

Applications/Uses

  • Automatic Testing
  • Battery-Powered Instruments
  • Data Acquisition Systems
  • Industrial Control Systems
  • Medical Instruments
  • Robotics

Description

The MAX1272/MAX1273 multirange 12-bit data-acquisition systems (DAS) operate with a single 5V supply. The software-programmable analog input accepts a variety of voltage ranges: ±10V, ±5V, 0 to 10V, 0 to 5V for the MAX1272; ±VREF, ±VREF / 2, 0 to VREF, 0 to VREF / 2 for the MAX1273. The software-selectable extended analog input range increases the effective dynamic range to 14 bits and provides the flexibility to interface 4-20mA powered sensors directly to a single 5V system. In addition, the MAX1272 provides fault protection to ±12V. Other features include a 5MHz track/hold (T/H) bandwidth, 87ksps throughput rate, and internal (4.096V) or external (2.40V to 4.18V) reference.

The MAX1272/MAX1273 serial interfaces connect directly to SPI/QSPI™/MICROWIRE®-compatible devices without any external logic.

Four software-programmable power-down modes (delayed standby, immediate standby, delayed full power-down, and immediate full power-down) provide low-current shutdown between conversions. In standby mode, the internal reference buffer remains active, thus eliminating startup delay.

The MAX1272/MAX1273 are available in an 8-pin µMAX® package. Both devices are available in the extended (-40°C to +85°C) temperature range.

Simplified Block Diagram

MAX1272, MAX1273: Typical Operating Circuit MAX1272, MAX1273: 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 .

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.