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