MAX1402:+5V、18位、低功耗、多通道、过采样(Σ-Δ) ADC

+5V工作,具有最高线性度的18位Σ-Δ

The MAX1402 low-power, multichannel, serial-output analog-to-digital converter (ADC) features matched 200µA current sources for sensor excitation. This ADC uses a sigma-delta modulator with a digital decimation filter to achieve 16-bit accuracy. The digital filter’s user-selectable decimation factor allows the conversion resolution to be reduced in exchange for a higher output data rate. True 16-bit performance is achieved at an output data rate of up to 480sps. In addition, the modulator sampling frequency may be optimized for either lowest power dissipation or highest throughput rate. The MAX1402 operates from a +5V supply. This device offers three fully differential input channels that may be independently programmed with a gain between +1V/V and +128V/V. Furthermore, it can compensate an input-referred DC offset up to 117% of the selected full-scale range. These three differential channels may also be configured to operate as five pseudo-differential input channels. Two additional, fully differential system-calibration channels are provided for gain and offset error correction. The MAX1402 may be configured to sequentially scan all signal inputs and provide the results via the serial interface with minimum communications overhead. When used with a 2.4576MHz or 1.024MHz master clock, the digital decimation filter can be programmed to produce zeros in its frequency response at the line frequency and associated harmonics, ensuring excellent line rejection without the need for further post-filtering. The MAX1402 is available in a 28-pin SSOP package.

关键特性
  • 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) for Sensor Excitation
  • 3 Fully Differential or 5 Pseudo-Differential Signal Input Channels
  • 2 Additional, Fully Differential Calibration Channels/Auxiliary Input Channels
  • Programmable Gain and Offset
  • Fully Differential Reference Inputs
  • Converts Continuously or On Command
  • Automatic Channel Scanning and Continuous Data Output Mode
  • Operates with +5V Analog Supply and +3V or +5V Digital Supply
  • 3-Wire Serial Interface—SPI™/QSPI™ Compatible
  • 28-Pin SSOP Package
MAX1402:功能框图
MAX1402:功能框图
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
数据手册DataSheet
语言下载文件备注
英文MAX1402.pdfRev 2; 03/2007
关键参数
Part NumberResolution
(bits)
Input Chan.Conv. Rate
(ksps)
ADC ArchitectureData BusDiff/S.E. InputExternal VREF
(V)
External VREF
(V)
Unipolar VIN
(V)
Bipolar VIN
(±V)
INL
(±LSB)
Package/PinsBudgetary
Price
ADCmaxminmaxmaxmaxSee Notes
MAX14021854.8Sigma-DeltaSPIDiff. Only02.52.52.53.93216SSOP/28$12.14 @1k
开发工具
技术资料
质量和环境数据
相关产品
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  • MAX1400:+5V、18位、低功耗、多通道、过采样(Σ-Δ) ADC
订购型号
型号状况推荐替代产品封装温度RoHS/无铅
MAX1402CAI停止供货MAX1402CAI+SSOP,;28引脚;81.6mm²0°C至+70°C参考数据资料
MAX1402CAI+生产中SSOP,;28引脚;81.6mm²0°C至+70°CRoHS/无铅:无铅
MAX1402CAI+T生产中SSOP,;28引脚;81.6mm²0°C至+70°CRoHS/无铅:无铅
MAX1402CAI-T停止供货MAX1402CAI+TSSOP;28引脚0°C至+70°C参考数据资料
MAX1402EAI停止供货MAX1402EAI+SSOP,;28引脚;81.6mm²-40°C至+85°C参考数据资料
MAX1402EAI+生产中SSOP,;28引脚;81.6mm²-40°C至+85°CRoHS/无铅:无铅
MAX1402EAI+T生产中SSOP,;28引脚;81.6mm²-40°C至+85°CRoHS/无铅:无铅
MAX1402EAI-T停止供货MAX1402EAI+TSSOP;28引脚-40°C至+85°C参考数据资料
MAX1402.pdf MAX1402
MAX1402.pdf MAX1402
MAX1402.pdf MAX1402
Reduce the Chances of Human Error: Part 2, Super Amps and Filters for Analog Interface MAX5492
Specifying Quartz Crystals MAX1414
3V/5V DACs Support Intelligent Current Loop MAX6520
MAX1402.pdf MAX1402
MAX1402.pdf MAX1402