描述The ADC10154 and ADC10158 are CMOS 10-bit plus sign successive approximation A/D converters with versatile analog input multiplexers, track/hold function and a 2.5V band-gap reference. The 4-channel or 8-channel multiplexers can be software configured for single-ended, differential or pseudo-differential modes of operation. The input track/hold is implemented using a capacitive array and sampled-data comparator. Resolution can be programmed to be 8-bit, 8-bit plus sign, 10-bit or 10-bit plus sign. Lower-resolution conversions can be performed faster. The variable resolution output data word is read in two bytes, and can be formatted left justified or right justified, high byte first.特性4- or 8- channel configurable multiplexer Analog input track/hold function 0V to 5V analog input range with single +5V power supply -5V to +5V analog input voltage range with ±5V supplies Fully tested in unipolar (single +5V supply) and bipolar (dual ±5V supplies) operation Programmable resolution/speed and output data format Ratiometric or Absolute voltage reference operation No zero or full scale adjustment required No missing codes over temperature Easy microprocessor interface Key Specifications Resolution 10-bit plus sign Integral linearity error ±1 LSB (max) Unipolar power dissipation 33 mW (max) Conversion time (10-bit + sign) 4.4 µs (max) Conversion time (8-bit) 3.2 µs (max) Sampling rate (10-bit + sign) 166 kHz Sampling rate (8-bit) 207 kHz Band-gap reference 2.5V ±2.0% (max)