ADX122AQFN10
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Ultra-Small, Ultra-Low-Power, 20-Bit, High-Precision Sigma-Delta (SD) ADC with Internal Reference and Oscillator
Product details
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Parameters
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Characteristics
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Package
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Description
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• Ultra-Compact QFN Package
2mm × 1.5mm × 0.4mm
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• Wide Supply Voltage Range
2V~5.5V
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• Low Current Consumption
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– Continuous Mode
Only 150µA
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– Single-Shot Mode
Auto Shutdown
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• Programmable Output Data Rate up to 3571 SPS
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QFN10 2mm × 1.7mm
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• Integrated Power-Line Frequency Rejection Filter (50Hz, 60Hz, 50Hz & 60Hz)
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• Single-Cycle Stable
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• External Sensor Detection
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• Internal Low-Drift Reference Voltage
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• Internal Oscillator
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• SPI™ Interface
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• Four Single-Ended or Two Differential Inputs
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• Operating Temperature Range
–40°C~125°C
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The ADX122(Q) is a precision, low-power, 20-bit resolution analog-to-digital converter (ADC) that is compatible with the SPI interface. Available in QFN-10 and MSOP-10 packages, the ADX122(Q) integrates several functional modules, including a low-drift voltage reference, oscillator, programmable gain amplifier (PGA), power-line frequency rejection filter, and digital comparator, to simplify system design complexity and cost. The device features an input multiplexer (MUX) that supports two differential or four single-ended input measurements. The PGA offers an input range from ±256mV to ±6.144V, enabling precise measurement of both large and small signals. The internal digital filter of the ADX122(Q) provides flexible output data rates, ranging from 10 SPS to 3571 SPS. The power-line frequency rejection filter can be configured for 50Hz or 60Hz rejection, or for simultaneous rejection of both 50Hz and 60Hz interference. The ADX122(Q) operates in either continuous conversion mode or single-shot mode. The internal filter is single-cycle stable in both modes. After a single conversion in single-shot mode, the device automatically powers down, significantly reducing power consumption during idle periods. ADC conversion results are transmitted via the SPI™ interface. The ADX122(Q) can operate over a wide supply voltage range, making it highly suitable for sensor measurement applications with power and space constraints.
