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A5191HRT_16 Datasheet, PDF (1/14 Pages) ON Semiconductor – HART Modem | |||
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A5191HRT
HART Modem
Description
The A5191HRT is a singleâchip, 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 transmitâsignal shaping.
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 halfâduplex operation used in HART communications.
Features
⢠Singleâchip, Halfâduplex 1200 Bits per Second FSK Modem
⢠Bell 202 Shift Frequencies of 1200 Hz and 2200 Hz
⢠3.0 V â 5.5 V Power Supply
⢠Transmitâsignal Wave Shaping
⢠Receive Bandâpass Filter
⢠Low Power: Optimal for Intrinsically Safe Applications
⢠Compatible with 3.3 V or 5 V Microcontroller
⢠Internal Oscillator Requires 460.8 kHz Crystal or Ceramic Resonator
⢠Meets HART Physical Layer Requirements
⢠Industrial Temperature Range of â40°C to +85°C
⢠Available in 28âpin PLCC, 32âpin QFN and 32âpin LQFP Packages
⢠These are PbâFree Devices
Applications
⢠HART Multiplexers
⢠HART Modem Interfaces
⢠4 â 20 mA Loop Powered Transmitters
www.onsemi.com
PLCCâ28
P SUFFIX
CASE 776AA
QFNâ32
N SUFFIX
CASE 488AM
LQFPâ32
L SUFFIX
CASE 561AB
MARKING DIAGRAMS
(Top Views)
1 28
A5191HRTPG
AWLYYWW
A5191
HRTL
AWLYYWWG
32
1
1
A5191
HRTNG
AWLYYWW
G
A5191HRTxx = Specific Device Code
xx
= P (PLCC), L (LQFP) or N (QFN)
A
= Assembly Location
WL = Wafer Lot
YY
= Year
WW = Work Week
G or G = PbâFree Package
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 14 of this data sheet.
© Semiconductor Components Industries, LLC, 2014
1
September, 2016 â Rev. 9
Publication Order Number:
A5191HRT/D
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