MAX1415, MAX1416 pdf datasheet

The MAX1415/MAX1416 low-power, 2-channel, serialoutputanalog-to-digital converters (ADCs) use a sigmadeltamodulator with a digital filter to achieve 16-bitresoluTIon with no missing codes. These ADCs are pincompaTIbleupgrades to the MX7705/AD7705. TheMAX1415/MAX1416 feature an internal oscillator (1MHzor 2.4576MHz), an on-chip input buffer, and a programmablegain amplifier (PGA). The devices offer an SPI™-/QSPI™-/MICROWIRE™-compaTIble serial interface.The MAX1415 requires a single 2.7V to 3.6V supply, andthe MAX1416 requires a single 4.75V to 5.25V supply.The operaTIng supply current is 400μA (max) with a 3Vsupply. Power-down mode reduces the supply current to2μA (typ). When operating with a supply of 3V, the powerdissipation is less than 1.44mW, making the MAX1415ideal for battery-powered applications.Self-calibration and system calibration allow theMAX1415/MAX1416 to correct for gain and offset errors.Excellent DC performance (±0.0015% FSR INL) and lownoise (700nV in unbuffered mode) make the MAX1415/MAX1416 ideal for measuring low-frequency signals witha wide dynamic range. These devices accept fully differentialbipolar/unipolar inputs. An internal input bufferallows for input signals with high source impedances. Anon-chip digital filter, with a programmable cutoff and outputdata rate, processes the output of the sigma-deltamodulator. The first notch frequency of the digital filter ischosen to provide 150dB rejection of common-mode50Hz or 60Hz noise and 98dB rejection of normal-mode50Hz or 60Hz noise. A PGA and digital filtering allow signalsto be directly acquired with little or no signal-conditioningrequirements.The MAX1415/MAX1416 are available in 16-pin PDIP,SO, and TSSOP packages.ApplicationsIndustrial Instruments Weigh ScalesStrain-Gauge MeasurementsLoop-Powered SystemsFlow and Gas MetersMedical InstrumentationPressure TransducersThermocouple MeasurementsRTD Measurements