MAX197AEAI+

The MAX197AEAI+ is a multi range (±10V, ±5V, +10V, +5V), 12bit data acquisition system (DAS) with 8+4 bus interface in 28 pin SSOP package. It requires only single +5V supply for operation and accepts signals at its analogue inputs that may span both above the power supply rail and below ground. This system provides 8 analogue input channels that are independently software programmable for variety of ranges including ±10V, ±5V, 0V to +10V or 0V to +5V. This increases effective dynamic range to 14bits and provides the user flexibility to interface 4mA to 20mA, ±12V and ±15V powered sensors to a single +5V system. In addition, the converter is overvoltage tolerant to ±16.5V. A fault condition on any channel does not affect the conversion result of the selected channel. The MAX197A also includes 5MHz bandwidth track/hold, 100Ksps throughput rate, software selectable internal or external clock and acquisition, 8+4 parallel interface and an internal 4.096V or an external reference.

• Supply voltage range from 4.75V to 5.25V
• Operating temperature range from -40°C to 85°C
• Integral nonlinearity (INL) of ±1/2LSB and differential nonlinearity (DNL) of ±1LSB
• Internal or external acquisition control
• Conversion time of 6μs (external CLK) and 7.7μs (internal CLK, CCLK = 100pF)
• Two power down modes
• Offset error of ±3LSB (unipolar) and ±5LSB (bipolar)
• Gain error of ±7LSB (unipolar) and ±7LSB (bipolar)
• Throughput rate of 100Ksps (external CLK) and 62Ksps (internal CLK, CCLK = 100pF)
• Power supply rejection ratio of ±1/2LSB (external reference = 4.096V) and ±1/2 (internal reference)

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