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19-0283; Rev 5; 11/98

General Description

The MAX110/MAX111 analog-to-digital converters(ADCs) use an internal auto-calibration technique toachieve 14-bit resolution plus overrange, with no exter-nal components. Operating supply current is only550µA (MAX110) and reduces to 4µA in power-downmode, making these ADCs ideal for high-resolution bat-tery-powered or remote-sensing applications. A fastserial interface simplifies signal routing and opto-isola-tion, saves microcontroller pins, and offers compatibilitywith SPI , QSPI , and MICROWIRE . The MAX110

operates with ±5V supplies, and converts differentialanalog signals in the -3V to +3V range. The MAX111operates with a single +5V supply and converts differ-ential analog signals in the ±1.5V range, or single-ended signals in the 0V to +1.5V range.

____________________________Features

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Single +5V Supply (MAX111)Two Differential Input Channels

14-Bit Resolution Plus Sign and Overrange0.03% Linearity (MAX110)0.05% Linearity (MAX111)Low Power Consumption:550µA (MAX110)640µA (MAX111)

4µA Shutdown CurrentUp to 50 Conversions/sec50Hz/60Hz RejectionAuto-Calibration Mode

No External Components Required16-Pin DIP/SO, 20-Pin SSOP

MAX110/MAX111

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Internal calibration allows for both offset and gain-errorcorrection under microprocessor (µP) control. BothOrdering Information

devices are available in space-saving 16-pin DIP andSO packages, as well as an even smaller 20-pin SSOPpackage.

________________________Applications

Process ControlWeigh ScalesPanel Meters

Data-Acquisition SystemsTemperature Measurement

*Contact factory for dice specifications.

Pin Configurations

SPI and QSPI are trademarks of Motorola, Inc. MICROWIRE is a trademark of National Semiconductor Corp.

________________________________________________________________Maxim Integrated Products

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