General Description
The MAX127/MAX128 are multirange, 12-bit data acquisition systems (DAS) that require only a single +5V supply for operation, yet accept signals at their analog inputs that may span above the power-supply rail and below ground. These systems provide eight analog input channels that are independently software programmable for a variety of ranges: ±10V, ±5V, 0 to +10V, 0 to +5V for the MAX127; and ±VREF, ±VREF/2, 0 to +VREF, 0 to +VREF/2 for the MAX128.

Features
♦ 12-Bit Resolution, 1/2 LSB Linearity
♦ +5V Single-Supply Operation
♦ I2C-Compatible, 2-Wire Serial Interface
♦ Four Software-Selectable Input Ranges
   MAX127: 0 to +10V, 0 to +5V, ±10V, ±5V
   MAX128: 0 to +VREF, 0 to +VREF/2, ±VREF,
      ±VREF/2
♦ 8 Analog Input Channels
♦ 8ksps Sampling Rate
♦ ±16.5V Overvoltage-Tolerant Input Multiplexer
♦ Internal 4.096V or External Reference
♦ Two Power-Down Modes
♦ 24-Pin Narrow DIP or 28-Pin SSOP Packages

Applications
   Industrial Control Systems
   Data-Acquisition Systems
   Robotics
   Automatic Testing
   Battery-Powered Instruments
   Medical Instruments