MAX191BCNG Datasheet

Data Acquisition - Analog to Digital Converters (ADC)


The MAX191BCNG is a monolithic, CMOS, 12-bit analog-todigitalconverter (ADC) featuring differential inputs,track/hold (T/H), internal voltage reference, internal orexternal clock, and parallel or serial μP interface. TheMAX191 has a 7.5μs conversion time, a 2μs acquisitiontime, and a guaranteed 100ksps sample rate.The MAX191BCNG operates from a single +5V supply or fromdual ±5V supplies, allowing ground-referenced bipolarinput signals. The device features a logic power-downinput, which reduces the 3mA VDD supply current to50μA max, including the internal-reference current.Decoupling capacitors are the only external componentsneeded for the power supply and reference. ThisADC operates with either an external reference, or aninternal reference that features an adjustment input fortrimming system gain errors.The MAX191BCNG provides three interface modes: two 8-bitparallel modes, and a serial interface mode that is compatiblewith SPITM, QSPITM, and MICROWIRETM serialinterfacestandards. MAX191BCNG Features • 12-Bit Resolution, 1/2LSB Linearity• +5V or ±5V Operation• Built-In Track/Hold• Internal Reference with Adjustment Capability• Low Power: 3mA Operating Mode20μA Power-Down Mode• 100ksps Tested Sampling Rate• Serial and 8-Bit Parallel μP Interface• 24-Pin Narrow DIP and Wide SO Packages MAX191BCNG Applications • Battery-Powered Data Logging• PC Pen Digitizers• High-Accuracy Process Control• Electromechanical Systems• Data-Acquisition Boards for PCs• Automatic Testing Systems• Telecommunications• Digital Signal Processing (DSP)


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