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 PDIP or 28-Pin SSOP Packages

Applications

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