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

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.

Applications

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

* 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