General Description
The MAX1146–MAX1149 low-power, 14-bit, multichannel, analog-to-digital converters (ADCs) feature an internal track/hold (T/H), voltage reference, and clock. The MAX1146/MAX1148 operate from a single +4.75V to +5.25V supply, and the MAX1147/MAX1149 operate from a single +2.7V to +3.6V supply. All analog inputs are software configurable for unipolar/bipolar and single-ended/differential operation.
The 4-wire serial interface connects directly to SPI™/QSPI™/MICROWIRE™ devices without external logic. The serial strobe output (SSTRB) allows convenient connection to digital signal processors. The MAX1146–MAX1149 use an internal clock or an external serial-interface clock to perform successive-approx-imation analog-to-digital conversions.

FEATUREs
♦ 8-Channel Single-Ended or 4-Channel Differential Inputs (MAX1148/MAX1149)
♦ 4-Channel Single-Ended or 2-Channel Differential Inputs (MAX1146/MAX1147)
♦ Internal Multiplexer and T/H
♦ Single-Supply Operation
   4.75V to 5.25V Supply (MAX1146/MAX1148)
   2.7V to 3.6V Supply (MAX1147/MAX1149)
♦ Internal Reference
   +4.096V (MAX1146/MAX1148)
   +2.500V (MAX1147/MAX1149)
♦ 116ksps Sampling Rate
♦ Low Power
   1.1mA (116ksps)
   120µA (10ksps)
   12µA (1ksps)
   300nA (Power-Down Mode)
♦ SPI-/QSPI-/MICROWIRE Compatible
♦ 20-Pin TSSOP

APPLICATIONs
  Portable Data Logging
  Data Acquisition
  Medical Instruments
  Battery-Powered Instruments
  Process Control