低功耗、12位采样ADC，内置电压基准及关断模式

 

器件号	Replacement	Explanation

说明

创建原理图或仿真器件，请使用EE-Sim^®:

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 V_DD supply 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.

MAX191：功能框图 放大+

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 Rate
• Serial and 8-Bit Parallel µP Interface
• 24-Pin Narrow DIP and Wide SO Packages

应用

• 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