MAX1403EAI+

The MAX1403EAI+ is a +3V, 18bit, low power, multichannel, oversampling (sigma-delta) ADC in 28 pin SSOP package. This ADC uses a sigma-delta modulator with a digital decimation filter to achieve 16bit accuracy at an output data rate of 480sps. The digital filter’s user-selectable decimation factor allows the conversion resolution to be reduced in exchange for a higher output data rate. The modulator sampling frequency may be optimized for either lowest power dissipation or highest throughput rate. The MAX1403 operates from +3V. It offers three fully differential input channels that may be independently programmed with a gain between +1V/V and +128V/V. It can compensate an input-referred DC offset up to 117% of the selected full-scale range. This three differential channels may also be configured to operate as five pseudo differential input channels. Two additional, fully differential system-calibration channels are provided for gain and offset error correction.

• Supply voltage range is 2.7V to 3.6V
• Operating temperature range from -40°C to 85°C
• Low quiescent current of 250μA in operating mode and 2μA in power-down mode
• SPI/QSPI compatible 3wire serial interface
• Automatic channel scanning and continuous data output mode

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