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MAX1284, MAX1285, MAX1285B
400ksps/300ksps, Single-Supply, Low-Power, Serial 12-Bit ADCs with Internal Reference


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Status
Active: In Production.

Description
FULL DATA SHEET (PDF, 292kB)
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The MAX1284/MAX1285 12-bit analog-to-digital converters (ADCs) combine a high-bandwidth track/hold (T/H), a serial interface with high conversion speed, an internal +2.5V reference, and low power consumption. The MAX1284 operates from a single +4.5V to +5.5V supply; the MAX1285 operates from a single +2.7V to +3.6V supply.

The 3-wire serial interface connects directly to SPI™/QSPI™/MICROWIRE™ devices without external logic. The devices use an external serial-interface clock to perform successive-approximation analog-to-digital conversions.

Low power, ease of use, and small package size make these converters ideal for remote-sensor and data-acquisition applications or for other circuits with demanding power consumption and space requirements. The MAX1284/MAX1285 are available in 8-pin SO packages.

These devices are pin-compatible, higher-speed versions of the MAX1240/MAX1241; for more information, refer to the respective data sheets.

An evaluation kit is available:  MAX1284EVC16, MAX1284EVKIT  

Key Features   Applications/Uses
  • Single-Supply Operation
    • +4.5V to +5.5V (MAX1284)
    • +2.7V to +3.6V (MAX1285)
  • ±1 LSB (max) DNL, ±1 LSB (max) INL
  • 400ksps Sampling Rate (MAX1284)
  • Internal Track/Hold
  • Internal +2.5V Reference
  • Low Power: 2.5mA (400ksps)
  • SPI/QSPI/MICROWIRE 3-Wire Serial Interface
  • Pin-Compatible, High-Speed Upgrades to MAX1240/MAX1241
  • 8-Pin SO Package

 
  • Battery-Powered Applications
  • Data Acquisition
  • Medical Instruments
  • Pen Digitizers
  • Portable Data Logging
  • Process Control

    Key Specifications:  Precision ADCs (< 5Msps)
    Part Number Resolution
    (bits)
    Input Chan. Conv. Rate
    (ksps)
    Conv. Time
    (µs)
    Data Bus
    (bits)
    Ref.
    (V)
    Diff. Inputs VSUPPLY
    (V)
    ICC
    (mA)
    Power
    (mW)
    Standby Mode Package/Pins Price
    ADC max typ typ See Notes
    MAX1284  12 1 400 2.5 Serial Int.+2.5 No 5 2.5 13.75 No
    SOIC(N)/8
    $4.85 @1k
    MAX1285  300
    3
    3.3
    SOIC(N)/8
    $4.85 @1k
    See All Precision ADCs (< 5Msps) (377)

    Diagram
    MAX1284, MAX1285, MAX1285B: Typical Operating Circuit
    Typical Operating Circuit

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    Document Ref.: 19-1687; Rev 1; 2001-12-07
    This page last modified: 2009-10-27


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