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