MAX1138EEE+

The MAX1138EEE+ is a low power, 12-channel, 2-wire serial 10bit analogue to digital converter (ADC) in 16 pin QSOP package. The device includes internal track/hold, voltage reference, clock and high speed I2C compatible 2-wire serial interface (400KHz fast mode, 1.7MHz high speed mode). It operates from 4.5V to 5.5V single supply and requires only 670μA at maximum sampling rate of 94.4Ksps. Supply current falls below 230μA for sampling rates under 46Ksps. AutoShutdown powers down the device between conversions by reducing supply current to less than 1μA at low throughput rates. The fully differential analogue inputs are software configurable for unipolar/bipolar and single ended/differential operation. The full scale analogue input range is determined by internal reference or by an externally applied reference voltage ranging from 1V to VDD. The MAX1138 is used in battery powered test equipments, solar powered remote systems, system supervision and received signal strength indicators.

• Internal FIFO with channel scan mode
• Operating temperature range from -40°C to 85°C
• Internal reference voltage of 4.096V and internal clock
• 12-channel single ended or 6-channel fully differential inputs
• Full power bandwidth of 3MHz (SINAD <gt/> 57dB) and full linear bandwidth of 5MHz (-3dB point)
• INL of ±1LSB and DNL of ±1LSB (no missing codes over temperature)
• Offset error of ±1LSB and gain error of ±1LSB
• Power supply rejection ratio of ±0.01LSB/V
• Serial clock frequency of 400KHz

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