Maxim 公司的MAX11359A智能数据收罗系统(DAS)是基于16位sigma-delta模拟数据转换器(ADC),集成了ADC,DAC,运算放大器,可选择的基准电压,温度传感器,模拟开关, 32kHz振荡器,带告警功能的实时时钟,高频锁相还(FLL),四个可编程I/O,中断发生器,以及1.8V和2.7V电压监督器,主要用在以电池为能源和手提设备,电化学和光学传感器,医疗设备,工业控制和数据收罗系统.本文先容了MAX11359A的主要特点,方框架图以及各种应用电路,包罗带双LED和单个光电二极管的光反射计应用电路, 带两个遥控传感器的温度赔偿电路,可编增益仪表放大器, LCD 对比度调解应用电路和单端和差分压电蜂鸣器驱动电路等. The MAX11359A smart data-acquisition system (DAS) is based on a 16-bit, sigma-delta analog-to-digital converter (ADC) and system-support functionality for a microprocessor(μP)-based system. The device integrates an ADC, DAC, operational amplifiers, internal selectable reference, temperature sensors, analog switches, a 32kHz oscillator, a real-time clock (RTC) with alarm, a high-frequency-locked loop (FLL) clock,four user-programmable I/Os, an interrupt generator, and 1.8V and 2.7V voltage monitors in a single chip. The MAX11359A has dual 10:1 differential input multiplexers (muxes) that accept signal levels from 0 to AVDD. An on-chip 1x to 8x programmable-gain amplifier (PGA) measures low-level signals and reduces external circuitry required. The MAX11359A operates from a single +1.8V to +3.6V supply and consumes only 1.4mA in normal mode and only 6.1μA in sleep mode. The MAX11359A has one DAC with two uncommitted op amps. The serial interface is compatible with either SPI™/QSPI™ or MICROWIRE™, and is used to power up, configure, and check the status of all functional blocks. The MAX11359A is available in a space-saving 40-pin TQFN package and is specified over the commercial (0℃ to +70℃) and the extended (-40℃ to +85℃) temperature ranges. MAX11359A主要特点: +1.8V to +3.6V Single-Supply Operation Multichannel 16-Bit Sigma-Delta ADC 10sps to 512sps Programmable Conversion Rate Self and System Offset and Gain Calibration PGA with Gains of 1, 2, 4, or 8 Unipolar and Bipolar Modes 10-Input Differential Multiplexer 10-Bit Force-Sense DAC Uncommitted Op Amps Dual SPDT Analog Switches Selectable References 1.251V, 1.996V, and 2.422V Internal Charge Pump System Support Real-Time Clock and Alarm Register Internal/External Temperature Sensor Internal Oscillator with Clock Output User-Programmable I/O and Interrupt Generator VDD Monitors SPI/QSPI/MICROWIRE, 4-Wire Serial Interface Space-Saving (6mm x 6mm x 0.8mm) 40-Pin TQFN Package MAX11359A应用: Battery-Powered and Portable Devices Electrochemical and Optical Sensors Medical Instruments Industrial Control Data-Acquisition Systems 详情请复制打开此衔接地址: |