MAX110BCPE+

The MAX110BCPE+ is one member of the MAX110 series.The MAX110 analog-to-digital converters(ADCs) use an internal auto-calibration technique to achieve 14-bit resolution plus overrange, with no external components. Operating supply current is only 550A (MAX110) and reduces to 4A in power-down mode, making these ADCs ideal for high-resolution battery- powered or remote-sensing applications. A fast serial interface simplifies signal routing and opto-isolation,saves microcontroller pins, and offers compatibility with SPI™, QSPI™, and MICROWIRE™. The MAX110 operates with ±5V supplies, and converts differential analog signals in the -3V to +3V range. The MAX111 operates with a single +5V supply and converts differential analog signals in the ±1.5V range, or singleended signals in the 0V to +1.5V range.

Features of the MAX110BCPE+ are:(1)two differential input channels; (2)14-bit resolution plus sign and overrange; (3)0.03% linearity (MAX110); (4)low power consumption:550A (MAX110); (5)up to 50 conversions/sec; (6)50Hz/60Hz rejection; (7)auto-calibration mode; (8)no external components required; (9)16-pin DIP/SO, 20-pin SSOP.The up/down counter clocks data in from the comparator at the oversampling clock rate and averages the pulse-width-modulated (PWM) square wave to produce the conversion result. A 16-bit static shift register stores the result at the end of the conversion.

The absolute maximum ratings of the MAX110BCPE+ can be summarized as:(1)Vdd to GND:+6V;(2)storage temperature range:-65 to 160;(3)lead temperature:300;(4)continuous power dissipation:842mW;(5)operating temperature ranges:0 to 70.Stresses beyond those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.The shortest conversion time resulting in maximum simultaneous rejection of both 60Hz and 50Hz line frequencies is 100ms. When using the MAX111, use a 200ms conversion time for maximum 60Hz and 50Hz rejection and optimum performance. For either device,select the appropriate oversampling clock frequency and either an 81,240 or 102,400 clock cycles per conversion(CCPC) ratio. Table 6 suggests the possible configurations.