Overview
The A5191HRTLG-XTP, produced by onsemi, is a single-chip, CMOS modem designed for use in Highway Addressable Remote Transducer (HART) field instruments and masters. This modem integrates all the necessary functions to satisfy HART physical layer requirements, including modulation, demodulation, receive filtering, carrier detection, and transmit-signal shaping. It operates using phase-continuous frequency shift keying (FSK) at a data rate of 1200 bits per second.
Key Specifications
| Parameter | Min | Typ | Max | Units |
|---|---|---|---|---|
| Ambient Temperature (TA) | -40 | 85 | °C | |
| Supply Voltage (VDD) | 3.0 | 5.5 | V | |
| Data Rate | 1200 | 1200 | bps | |
| Shift Frequencies | 1200 Hz, 2200 Hz | Hz | ||
| Input Voltage, Low (VIL) | 0.3 * VDD | V | ||
| Input Voltage, High (VIH) | 0.7 * VDD | V | ||
| Output Voltage, Low (VOL) | 0.4 | V | ||
| Output Voltage, High (VOH) | 2.4 | V | ||
| Power Supply Current (IDDA) | 150 | 600 | μA | |
| Package Type | 32-pin LQFP |
Key Features
- Single-chip, half-duplex 1200 bits per second FSK modem
- Bell 202 shift frequencies of 1200 Hz and 2200 Hz
- 3.0 V to 5.5 V power supply range
- Transmit-signal wave shaping and receive band-pass filtering
- Low power consumption, optimal for intrinsically safe applications
- Compatible with 3.3 V or 5 V microcontrollers
- Internal oscillator requires a 460.8 kHz crystal or ceramic resonator
- Meets HART physical layer requirements
- Industrial temperature range of -40°C to +85°C
- Pb-free devices available in 28-pin PLCC, 32-pin QFN, and 32-pin LQFP packages
Applications
- HART multiplexers
- HART modem interfaces
- 4-20 mA loop-powered transmitters
Q & A
- What is the primary function of the A5191HRTLG-XTP?
The A5191HRTLG-XTP is a single-chip modem designed for use in HART field instruments and masters, providing modulation, demodulation, and other necessary functions for HART communication.
- What is the data rate of the A5191HRTLG-XTP?
The data rate is 1200 bits per second.
- What are the operating voltage ranges for the A5191HRTLG-XTP?
The device operates within a supply voltage range of 3.0 V to 5.5 V.
- What types of packages are available for the A5191HRTLG-XTP?
The device is available in 28-pin PLCC, 32-pin QFN, and 32-pin LQFP packages.
- What is the temperature range for the A5191HRTLG-XTP?
The device operates within an industrial temperature range of -40°C to +85°C.
- Is the A5191HRTLG-XTP compatible with 3.3 V microcontrollers?
- What type of modulation does the A5191HRTLG-XTP use?
The device uses phase-continuous frequency shift keying (FSK) modulation.
- What are the shift frequencies used by the A5191HRTLG-XTP?
The shift frequencies are 1200 Hz and 2200 Hz.
- Does the A5191HRTLG-XTP require external components for operation?
- What is the purpose of the carrier detect feature in the A5191HRTLG-XTP?
The carrier detect feature indicates the presence of a valid HART signal.
- Is the A5191HRTLG-XTP Pb-free?
