MAX1285B

 

Part Number	Replacement	Explanation

Description

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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.

MAX1284, MAX1285, MAX1285B: Typical Operating Circuit Enlarge+

Key Features

• 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

Applications/Uses

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