MAX1402 - +5V、18位、低功耗、多通道、过采样(Σ-Δ) ADC

MAX1402是Maxim美信半导体公司的一款数据转换器和采样-保持电路产品，MAX1402是+5V、18位、低功耗、多通道、过采样(Σ-Δ) ADC，本站介绍了MAX1402的封装应用图解、特点和优点、功能等，并给出了与MAX1402相关的Maxim元器件型号供参考。

MAX1402 - +5V、18位、低功耗、多通道、过采样(Σ-Δ) ADC - 数据转换器和采样-保持电路 - +5V工作，具有最高线性度的18位Σ-Δ - 美信半导体

产品概述

The MAX1402 low-power, multichannel, serial-outputanalog-to-digital converter (ADC) features matched200µA current sources for sensor excitation. This ADCuses a sigma-delta modulator with a digital decimationfilter to achieve 16-bit accuracy. The digital filter’s user-selectabledecimation factor allows the conversion resolutionto be reduced in exchange for a higher outputdata rate. True 16-bit performance is achieved at anoutput data rate of up to 480sps. In addition, the modulatorsampling frequency may be optimized for eitherlowest power dissipation or highest throughput rate.The MAX1402 operates from a +5V supply.

This device offers three fully differential input channelsthat may be independently programmed with a gainbetween +1V/V and +128V/V. Furthermore, it can compensatean input-referred DC offset up to 117% of theselected full-scale range. These three differential channelsmay also be configured to operate as five pseudo-differentialinput channels. Two additional, fullydifferential system-calibration channels are provided forgain and offset error correction.

The MAX1402 may be configured to sequentially scan allsignal inputs and provide the results via the serial interfacewith minimum communications overhead. Whenused with a 2.4576MHz or 1.024MHz master clock, thedigital decimation filter can be programmed to producezeros in its frequency response at the line frequency andassociated harmonics, ensuring excellent line rejectionwithout the need for further post-filtering.

The MAX1402 is available in a 28-pin SSOP package.

关键特性

以下关键特性由Maxim美信半导体提供：

18-Bit Resolution, Sigma-Delta ADC

16-Bit Accuracy with No Missing Codes to 480sps

Low Quiescent Current

250µA (operating mode)

2µA (power-down mode)

Matched On-Board Current Sources (200µA) forSensor Excitation

3 Fully Differential or 5 Pseudo-Differential SignalInput Channels

2 Additional, Fully Differential CalibrationChannels/Auxiliary Input Channels

Programmable Gain and Offset

Fully Differential Reference Inputs

Converts Continuously or On Command

Automatic Channel Scanning and ContinuousData Output Mode

Operates with +5V Analog Supply and +3V or +5VDigital Supply

3-Wire Serial Interface—SPI™/QSPI™ Compatible

28-Pin SSOP Package

热门应用

环路供电系统

便携式工业仪表

便携式称重仪

压力传感器与变送器

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