在工业测控领域中，需要采集各种模拟信号，经常会使用模数转换器，由于Linear公司的芯片功能强大，稳定可靠，在这里我给大家推荐一款 芯片LTC2404/ LTC2408。
LTC2404/ LTC2408是24bit adc，模拟输入通道4/8，采样频率小于60赫兹， mcu通过 spi通信接口访问LTC2404/ LTC2408，工作电压Single Supply 2.7V to 5.5V ，参考电压0.1v到vcc电源,用于称重、温度等工业仪表领域。
附件的英文手册详细介绍特点 The LTC®2404/LTC2408 are 4-/8-channel 2.7V to 5.5V micropower 24-bit A/D converters with an integrated oscillator, 4ppm INL and 0.3ppm RMS noise. They use delta-sigma technology and provide single cycle digital filter settling time (no latency delay) for multiplexed applications. The first conversion after the channel is changed is always valid. Through a single pin the LTC2404/LTC2408 can be configured for better than 110dB rejection at 50Hz or 60Hz ±2%, or can be driven by an external oscillator for a user defined rejection frequency in the range 1Hz to 120Hz. The internal oscillator requires no external frequency setting components. The converters accept any external reference voltage from 0.1V to VCC. With their extended input conversion range of –12.5% VREF to 112.5% VREF the LTC2404/LTC2408 smoothly resolve the offset and overrange problems of preceding sensors or signal conditioning circuits. The LTC2404/LTC2408 communicate through a flexible 4-wire digital interface which is compatible with SPI and MICROWIRE™ protocols.
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