Flex Dual Channel ADC 14 Bit 2 MSPS
Flex Dual Channel ADC 14 Bit 2 MSPS
Anabit's Flex Dual Channel ADC is an open-source reference design that delivers a high-speed, 14-bit precision unipolar dual channel ADC with three different precision voltage reference options: 2.5V, 3.3V, and 4.096V. The Flex design uses a Successive-Approximation Register (SAR) ADC architecture. The ADC is preceded by a 2 channel MUX that is easily controlled by a digital logic pin and allows you to control what channel the ADC is sampling from.
The Flex Dual Channel ADC features a front end design that contains anti-aliasing filters and high speed op amps that drive the ADC input to support the maximum sampling rate of 2MSPS. The Flex employs a negative bias voltage generator to ensure the input op amps do not saturate at input analog signals close to or at ground potential (0V).
Example Use Cases for the Flex Dual Channel ADC
- Monitor dynamic sensors like vibration industrial condition monitor and predictive maintenance applications
- Monitoring dynamic process variables like flow, pressure, or light levels
- Measure dynamic current signals using precision shunts for power optimization designs
- Instrumentation and data acquisition applications
- Educational labs – an open-source platform for exploring ADC and op amp circuit design principals
Product features
Product features
--> Two channel 14-bit SAR ADC with up to 2MSPS throughput.
--> Front end high speed op amp buffers with anti-aliasing RC filters on both channels
--> Negative bias generator for op amp negative supply input for true ground-level or 0V operation
--> Access to the voltage reference for calibration purposes or to use for external circuits
--> Optional separate digital I/O voltage, if analog supply voltage does not match digital logic levels
--> Integrated power supply filtering for improved noise performance
Specifications
Specifications
--> Measurement accuracy of ADC + front end + reference voltage: ±(0.051% of reading + 3.3 LSB) — typical for either channel
--> By employing a simple two point calibration, each channel can achieve a calibrated accuracy: ±(0.01% of reading + 1.3 LSB) — typical
--> Internal reference voltage can be accessed from pin "VREF" current range of reference for external use is -5mA to 5mA.
--> With the 2.5V voltage reference option, the input power voltage range (VIN) is 3.3V to 5V. With either the 3.3V or 4.096V voltage reference options the input power voltage range (VIN) is 5V.
--> Max current consumption (analog and digital) is ~10mA. Just digital current is about 3mA.
--> An optional digital supply input for the SPI communication can be added if the digital logic voltage is different than the analog voltage supply, range: 1.8V to 5V.
--> Front end input circuit includes 1Mohm input termination, ~750kHz anti-alias filter, buffer amp to drive ADC input, and charge bucket filter to prevent measurement glitches
Bulk Pricing and Discount Information
Bulk Pricing and Discount Information
Discount for large orders
5% discount for quantities of 10 or above, automatically applied at checkout. Contact Anabit for bulk pricing on quantities of 50 or more.
Resources
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Tutorials
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