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DS8500
HART调制解调器

极少的外部元件和小尺寸20引脚TQFN封装,有效降低系统成本和尺寸


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概述
完整的数据资料 (PDF, 116kB)
英文 Download this datasheet in PDF format下载

The DS8500 is a single-chip modem with Highway Addressable Remote Transducer (HART) capabilities and satisfies the HART physical layer requirements. The device integrates the modulation and demodulation of the 1200Hz/2200Hz FSK signal, has very low power consumption, and needs only a few external components due to the integrated digital signal processing. The input signal is sampled by an analog-to-digital converter (ADC), followed by a digital filter/demodulator. This architecture ensures reliable signal detection in noisy environments. The output digital-to-analog converter (DAC) generates a sine wave and provides a clean signal with phase-continuous switching between 1200Hz and 2200Hz. Low power is achieved by disabling the receive circuits during transmit and vice versa. The DS8500 is ideal for low-power process control transmitters.

关键特性   应用/使用
  • Single-Chip, Half-Duplex, 1200bps FSK Modulation and Demodulation
  • Digital Signal Processing Provides Reliable Input Signal Detection in Noisy Conditions
  • Sinusoidal Output Signal with Lowest Harmonic Distortion
  • Few External Components Enable a Space-Saving Solution
  • Standard Component 3.6864MHz Crystal
  • Complies to HART Physical Layer Requirements
  • 2.7V to 3.6V Operating Voltage
  • 285µA (max) Current Consumption
  • Space-Saving, 5mm x 5mm x 0.8mm, 20-Pin TQFN Package

 
  • 4mA到20mA环路供电变送器,用于温度、压力、流量及电平测量
  • HART调制解调器接口连通
  • HART多路复用器

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    2008-10-21
    本页最后一次更新: 2008-11-21



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