Microchip MCP3564八路53．6 kSPS 24位Delta－Sigma ADC解决方案

Microchip公司的MCP3561/2/4是一/二/八路取样速率53.6 kSPS的24位Delta-Sigma模数转换器(ADC),可编数据速率高达153.6 kSPS.具有集成的特性如内部振荡器,温度传感器和断线传感器检测,从而降低系统元件数量和总体解决方案成本.MCP3561/2/4 ADC采用从32到98304的过取样比(OSR)和1/3X 到64X增益进行完全配置,分辨率24位,SINAD为106.7dB,THD为-116 dBc,SFDR(增益= 1X,4800 SPS)为120dBc,失调误差漂移为4/增益nV/℃(AZ_MUX = 1),增益误差漂移为0.5 ppm/℃(增益 = 1X),低噪音为90 nVRMS (增益= 16X,12.5 SPS),RMS ENOB高达23.3位,20MHz SPI兼容接口,AVDD为2.7V-3.6V,DVDD为1.8V-3.6V,工作温度-40℃到+125℃.主要用在精密传感器换能器和发送器如压力,应力,流量和力测量,工厂自动化和过程控制,手持仪表和温度测量.本文介绍了MCP3561/2/4系列主要特性,功能框图,应用案例以及用于PIC32 MCU的MCP3564 ADC评估板ADM00583主要特性,电路图,材料清单和PCB设计图.
Two/Four/Eight-Channel, 153.6 kSPS, Low-Noise 24-Bit Delta-Sigma ADCs
The MCP3561/2/4 are 1/2/4-channel, 24-bit,Delta-Sigma Analog-to-Digital Converters (ADCs), withprogrammable data rate of up to 153.6 kSPS. Theyoffer integrated features such as internal oscillator,temperature sensor and burnout sensor detection, inorder to reduce system component count and totalsolution cost.
The MCP3561/2/4 ADCs are fully configurable withOversampling Ratio (OSR) from 32 to 98304 and gainfrom 1/3X to 64X. These devices include an internalsequencer (SCAN mode) with multiple monitorchannels and a 24-bit timer to be able to automaticallycreate conversion loop sequences without needingMCU communications. Advanced security featuressuch as CRC and register map lock, can ensureconfiguration locking and integrity as well ascommunication data integrity for secure environments.
These devices come with a 20 MHz SPI-compatibleserial interface. Communication is largely simplifiedwith 8-bit commands, including various ContinuousRead/Write modes and 24/32-bit multiple data formatsthat can be accessed by the Direct Memory Access(DMA) of an 8-bit, 16-bit or 32-bit MCU.
The MCP3561/2/4 are available in an ult...