MAX1270ACNG
数据手册.pdf多量程， + 5V，8通道，串行12位ADC Multirange, +5V, 8-Channel, Serial 12-Bit ADCs
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
