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12-Bit, Multichannel ADCs/DACs with FIFO, Temperature Sensing, and GPIO Ports

Product Details

Key Features

Parametric specs for Precision ADCs (< 5Msps)
Resolution (bits) (ADC) 12
# Input Channels 16
Conv. Rate (ksps) (max) 300
Data Bus SPI
ADC Architecture SAR
Diff/S.E. Input Both
Internal VREF (V) (nominal) 4.096
External VREF (V) (min) 1
External VREF (V) (max) 5.25
Unipolar VIN (V) (max) 4.096
Bipolar VIN (±V) (max) 2.048
INL (±LSB) 0.5
Package/Pins TQFN/48
Budgetary
Price (See Notes)
16.14
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Simplified Block Diagram

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Parameters

Parametric specs for Precision ADCs (<u><</u> 5Msps)
Resolution (bits) (ADC) 12
# Input Channels 16
Conv. Rate (ksps) (max) 300
Data Bus SPI
ADC Architecture SAR
Diff/S.E. Input Both
Internal VREF (V) (nominal) 4.096
External VREF (V) (min) 1
External VREF (V) (max) 5.25
Unipolar VIN (V) (max) 4.096
Bipolar VIN (±V) (max) 2.048
INL (±LSB) 0.5
Package/Pins TQFN/48
Budgetary
Price (See Notes)
16.14

Key Features

  • Reduce Parts Count and Board Space with Fully Integrated System Monitor and Controller
    • Monitors 8 (MAX1220) or 16 Voltages (MAX1257/MAX1258) Using 12-Bit, 225ksps ADC
    • Controls 8 Output Voltage Level with 12-Bit, Octal, 2µs Settling DAC with Ultra-Low Glitch Energy (4n x VS)
    • Measures Temperature with Internal ±1°C Accurate Temperature Sensor
    • Options for Using Either Internal 2.5V (MAX1257) Reference, 4.096V (MAX1220/MAX1258) Reference or External Reference
    • Includes 4 (MAX1220) or 12 (MAX1257/1258) GPIOs
  • Lower Processor Requirements and Minimize Power Consumption and Heat Dissipation
    • On-Chip FIFO, Channel-Scan Mode and Data Averaging
    • Autoshutdown Between Conversions
    • Low-Power ADC
      • 2.5mA at 225ksps
      • 22µA at 1ksps
    • Low-Power DAC: 1.5mA
    • TQFN Package with Exposed Pad
  • Enable Maximum Dynamic Range with Availability of 2 Analog Power Supply Options: +2.7V to +3.6V (MAX1257) or +4.75V to +5.25V (MAX1220/MAX1258)

Applications/Uses

  • Base-Station Control Loops
  • Controls for Optical Components
  • Data Acquisition Systems
  • System Supervision and Control

Description

The MAX1220/MAX1257/MAX1258 is a highly integrated system monitoring and control solution which includes a 16-channel (MAX1257/MAX1258) or 8-ch (MAX1220) 12-bit Analog to Digital Converter (ADC), twelve 12-bit Digital to Analog Converters (DACs), an internal reference, an internal temp sensor, a 4-bit (MAX1220) or 12-bit (MAX1257/MAX1258) GPIO port, and a 25MHz SPI-/QSPI™-/MICROWIRE®- compatible serial interface.

The MAX1220 is available in a 36-pin TQFN package. The MAX1257/MAX1258 are available in 48-pin TQFN package. All devices are specified over the -40°C to +85°C temperature range.

Simplified Block Diagram

MAX1220, MAX1257, MAX1258: Functional Diagram MAX1220, MAX1257, MAX1258: Functional 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 .