MAX191BCWG+

The MAX191BCWG+ is a low power, 12bit sampling analogue to digital converter (ADC) with internal reference and power-down in 24 pin WSOIC package. It uses an successive approximation and input track/hold (T/H) circuitry to convert an analogue input signal to a 12bit digital output. Flexible control logic provides easy interface to microprocessors (μPs) so most applications require only the addition of passive components. No external hold capacitor is required for the T/H. It operates from a single supply or from dual supplies allowing ground-referenced bipolar input signals. The device features a logic power-down input which reduces 3mA VDD supply current to 50μA (max) including the internal-reference current. It provides 3 interface modes, two 8bit parallel modes and a serial interface mode that is compatible with SPI, QSPI and MICROWIRE serial interface standards. It is used in PC pen digitizers, electromechanical systems, automatic testing systems and telecommunications.

• Supply voltage range is 4.75V to 5.25V
• Operating temperature range from 0°C to 70°C
• Minimum conversion time of 7.5μs & maximum acquisition time is 2μs
• Operates with either an external reference or an internal reference
• Internal reference features an adjustment input for trimming system gain errors
• Tested sampling rate of 100Ksps
• Low power of 3mA operating mode and 20μA power-down mode
• Integral nonlinearity is ±1LSB and differential nonlinearity is ±1LSB
• SINAD of 70dB & THD of -80dB at 1KHz input signal, TA = +25°C

注释

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