A5191HRT

更新时间： 2024-10-29 06:35:15

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A5191HRT 数据手册

A5191HRT

HART Modem

1.0 Key Features

• Can be used in designs presently using the SYM20C15

• Single-chip, half-duplex 1200 bits per second FSK modem

• Bell 202 shift frequencies of 1200Hz and 2200Hz

• 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 460.8kHz crystal or ceramic resonator

• Meets HART physical layer requirements

• Industrial temperature range of -40°C to +85°C

• Available in 28-pin PLCC and 32-pin LQFP packages

2.0 Description

The A5191HRT 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 A5191HRT is pin-

compatible with the SYM20C15. See the Pin Description and Functional Description sections for details on pin compatibility with the

SYM20C15.

The A5191HRT uses phase continuous frequency shift keying (FSK) at 1200 bits per second. To conserve power the receive circuits

are disabled during transmit operations and vice versa. This provides the half-duplex operation used in HART communications.

Figure 1: 28-Pin PLCC Pin Out Diagrams (Green & Non-Green)

May 2008 – Rev. 3

Publication Order Number:

A5191HRT/D

12 3 4 5 6 7...13

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型号	品牌	获取价格	描述	数据表
A5191HRT_11	ONSEMI	获取价格	HART Modem
A5191HRTL	ONSEMI	获取价格	1.2kbps DATA, MODEM, PQFP32, LQFP-32
A5191HRTLG	ONSEMI	获取价格	1.2kbps DATA, MODEM, PQFP32, GREEN, LQFP-32
A5191HRTLG	AMI	获取价格	Modem, 1.2kbps Data, CMOS, PQFP32, GREEN, LQFP-32
A5191HRTLG-XTD	ONSEMI	获取价格	HART Modem
A5191HRTLG-XTP	ONSEMI	获取价格	HART Modem
A5191HRTL-XTP	AMI	获取价格	Modem,
A5191HRTNG-XTD	ONSEMI	获取价格	HART Modem
A5191HRTNG-XTP	ONSEMI	获取价格	HART Modem
A5191HRTP	ONSEMI	获取价格	1.2kbps DATA, MODEM, PQCC28, PLASTIC, LCC-28