LTC2421CMS#PBF

LINEAR TECHNOLOGY  LTC2421CMS#PBF  模数转换器, 20 bit, 7.5 SPS, 单, 2.7 V, 5.5 V, MSOP

The is a 1-channel micropower 20-bit Analog-to-digital Converter ADC with an integrated oscillator. This ultra-small device uses delta-sigma technology and a new digital filter architecture that settles in a single cycle. This eliminates the latency found in conventional sigma-delta converter and simplifies multiplexed applications. Through a single pin, the ADC can be configured for better than 110dB rejection at 50/60Hz±2% or can be driven by an external oscillator for user defined rejection frequency in the range 1 to 120Hz. The internal oscillator requires no external frequency setting components. This converter accepts an external reference voltage from 0.1V to VCC. With an extended input conversion range of -12.5% to 112.5%VREF, the ADC smoothly resolves the offset and over-range problems of preceding sensors or signal conditioning circuits. It communicates through a 2/3-wire digital interface that is compatible with SPI and MICROWIRE™ protocols.

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Low supply current and auto shutdown

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Automatic channel selection Ping-Pong

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No latency - digital filter settles in a single conversion cycle

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Zero scale and full scale set for reference and ground sensing

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Internal oscillator - no external components required

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Pin compatible with LTC2401/LTC2402