General Description
●The MAX1270/MAX1271 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 can 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 MAX1270; ±VREF, ±VREF/2, 0 to VREF, 0 to VREF/2 for the MAX1271. This range switch ing increases the effective dynamic range to 14 bits and provides the flexibility to interface 4–20mA, ±12V, and ±15V powered sensors directly to a single +5V system.
●Features
●♦ 12-Bit Resolution, 0.5 LSB Linearity
●♦ +5V Single-Supply Operation
●♦ SPI/QSPI and MICROWIRE-Compatible 3-Wire Interface
●♦ Four Software-Selectable Input Ranges
● MAX1270: 0 to +10V, 0 to +5V, ±10V, ±5V
● MAX1271: 0 to VREF, 0 to VREF/2, ±VREF, ±VREF/2
●♦ Eight Analog Input Channels
●♦ 110ksps Sampling Rate
●♦ ±16.5V Overvoltage-Tolerant Input Multiplexer
●♦ Internal 4.096V or External Reference
●♦ Two Power-Down Modes
●♦ Internal or External Clock
●♦ 24-Pin Narrow PDIP or 28-Pin SSOP Packages
●Applications
● Industrial Control Systems
● Data-Acquisition Systems
● Battery-Powered
● Instruments
● Automatic Testing
● Robotics
● Medical Instruments
