Industrial HART-protocol modem

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Overview

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.

  • Highway Addressable Remote Transducer (HART) field instruments and masters
  • Instrumentation terminals and measurement devices
  • Low power
  • Bell 202 shift frequencies of 1200 Hz and 2200 Hz
  • Single-chip, half-duplex 1200 bits per second FSK modem
  • Transmit-signal wave shaping
  • Receive band-pass filter
  • Meets HART physical layer requirements
  • CMOS compatible

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ECAD Models

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Pricing ($/Unit)

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A5191HRTNG-XTP

Active

Pb

A

H

P

QFN-32

3

260

REEL

5000

Y

HART

1200 baud

1

1

3

5.5

0.02

670

5.0E-4

$2.1505

More Details

A5191HRTLG-XTD

Active

Pb

A

H

P

LQFP-32

3

260

JTRAY

250

Y

HART

1200 baud

1

1

3

5.5

0.02

670

5.0E-4

$4.439

More Details

A5191HRTLG-XTP

Active

Pb

A

H

P

LQFP-32

3

260

REEL

2500

Y

HART

1200 baud

1

1

3

5.5

0.02

670

5.0E-4

$4.2665

More Details

A5191HRTPG-XTP

Active

Pb

A

H

P

PLCC-28

3

260

REEL

750

Y

HART

1200 baud

1

1

3

5.5

0.02

670

5.0E-4

$4.2665

More Details

A5191HRTPG-XTD

Active

Pb

A

H

P

PLCC-28

3

260

TUBE

37

Y

HART

1200 baud

1

1

3

5.5

0.02

670

5.0E-4

$4.2619

More Details

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