HART Modem
SmarResearch
TechnologySource
HART® Fieldbus Profibus Intrinsic Safety Configuration Tools Semiconductors Training Custo...
Description
SmarResearch
TechnologySource
HART® Fieldbus Profibus Intrinsic Safety Configuration Tools Semiconductors Training Custom Design
HART Modem
HT2015
DataSheet
Features
Can be used in designs presently using the SYM20C15 or equivalent type chip
Single-chip, half-duplex 1200 bits per second FSK modem Bell 202 shift frequencies of 1200 Hz and 2200 Hz 3.3V-5.0V power supply Transmit-signal wave shaping Receive band-pass filter Low power: optimal for intrinsically safe applications CMOS compatible Internal oscillator requires 460.8 kHz crystal or ceramic resonator Meets HART physical layer requirements Industrial temperature range of -40 °C to +85 °C Available in a 28-pin PLCC and 32-pin LQFP packages
(LQFP pictured)
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1 HT2015DS - 0303
HT2015 General Description
General Description
The HT2015 is a single-chip, CMOS modem for use in Highway Addressable Remote Transducer (HART) field instruments and masters. The modem and a few external passive components provide all of the functions needed to satisfy HART physical layer requirements including modulation, demodulation, receive filtering, carrier detect and transmit-signal shaping. The HT2015 is pin-compatible with the SYM20C15. See the Pin Description and
Functional Description sections for details on pin compatibility with the SYM20C15.
The HT2015 uses Phase Continuous Frequency Shift Keying (FSK) at 1200 bits per second. To conserve power the receive circuits are disabled duri...
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