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


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说明

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.
MAX1402:功能框图 MAX1402:功能框图 放大+

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

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
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
MAX1402 1854.8Sigma-DeltaSPIDiff. Only02.52.52.53.93216
SSOP/28
$12.14 @1k
查看所有Precision ADCs (< 5Msps) (464)
Pricing Notes:
价格仅供参考,用于同类产品的比较。所提供报价为美元,需要依汇率折合成人民币。该价格将因当地关税、税率和汇率而异。有关特定订购量和指定版本的报价和供货问题,请参考:价格与供货网站或与指定代理商联系。


MAX1400EVKIT: MAX1400和MAX1402评估板/评估系统
MAX1402EVC16: MAX1400和MAX1402评估板/评估系统
MAX1402EVKIT: MAX1400和MAX1402评估板/评估系统

CAD Symbols and Footprints

  • MAX1402CAI
  • MAX1402CAI+
  • MAX1402CAI+T
  • MAX1402CAI-T
  • MAX1402EAI
  • MAX1402EAI+
  • MAX1402EAI+T
  • MAX1402EAI-T
  • 型号   生产流程   工艺   样本量   不合格   FIT @ 25°C   FIT @ 55°C  

    备注: 通过技术手段对故障率进行汇总,并映射到相关的材料部件号。 故障率与被测件的数量密切相关。

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