概述
The MAX191 is a monolithic, CMOS, 12-bit analog-to-digital converter (ADC) featuring differential inputs, track/hold (T/H), internal voltage reference, internal or external clock, and parallel or serial µP interface. The MAX191 has a 7.5µs conversion time, a 2µs acquisition time, and a guaranteed 100ksps sample rate.
The MAX191 operates from a single +5V supply or from dual ±5V supplies, allowing ground-referenced bipolar input signals. The device features a logic power-down input, which reduces the 3mA VDDsupply current to 50µA max, including the internal-reference current.
Decoupling capacitors are the only external components needed for the power supply and reference. This ADC operates with either an external reference, or an internal reference that features an adjustment input for trimming system gain errors.
The MAX191 provides three interface modes: two 8-bit parallel modes, and a serial interface mode that is compatible with SPI™, QSPI™, and MICROWIRE™ serial-interface standards.数据资料
现备有评估板:MAX191EVKIT
关键特性
12-Bit Resolution, 1/2 LSB Linearity
+5V or ±5V Operation
Built-In Track/Hold
Internal Reference with Adjustment Capability
Low Power:
3mA Operating Mode
20µA Power-Down Mode
100ksps Tested Sampling RateSerial and 8-Bit Parallel µP Interface24-Pin Narrow DIP and Wide SO Packages
应用/使用
自动测试设备(ATE)
电池供电数据记录
数据采集
数字
信号处理(DSP)
机电系统
高精度过程控制
PC笔输入量化器
电信
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